General implications of noise control in industrial environments

Industrial noise considerations and solutions

Industrial businesses can be a primary cause of noise pollution to the environment, which is why it is important to install acoustic systems into the building. Having appropriate soundproofing solutions within the complex can reduce the loud noises that heavy equipment can emit.

Introduction

Industrial processes are often very noisy as the operations and equipment to process and produce industrial outcomes often include heavy machinery with limited barriers to restrict equipment noise from carrying beyond the confines of the installations.

The introduction of stringent health, safety, and environmental regulations has led to an increase in importance when considering noise control around industrial processes.

The aim of these regulations is to ensure that a worker’s hearing is protected by preventing them from being subject to high levels of noise which could cause long-term hearing damage.

From an environmental point of view, these regulations have been put in place to keep industrial facilities’ property sound levels below the required noise levels that vary by zoning.

Why do you need industrial soundproofing

There are various reasons as to why you might need to have noise control in your industrial premises. External and internal noise levels need to be kept to an acceptable level, and industrial soundproofing products offer solutions to excessive noise problems for both the environment and workers.

Some plants operate within residential areas, so it’s important to keep external noise to a minimum in order to prevent noise complaints and upset from the local community. Other industrial complexes use loud machinery that goes above the acceptable noise level, this can cause problems internally. Such issues need to be addressed as best as possible, which is why industrial noise control is a necessary asset to have.

Failure to comply with noise mitigation control could see the owner’s fighting legal battles and compensation claims.

Industrial Soundproofing Considerations

There are three basic elements in any noise control system:

  • The source of the sound
  • The path through which the sound travels
  • The receiver of the sound

In many situations, of course, there are several sources of sound, various paths for the sound, and more than one receiver, but the basic principles of noise control would be the same as for the more simple case. The objective of most noise control programs is to reduce the noise at the receiver. This may be accomplished by making modifications to the source, the path, or the receiver, or to any combination of these elements.

The purpose of the noise control procedure may be to prevent hearing loss for personnel, to allow effective face-to-face communication or telephone conversation, or to reduce noise so that neighbors of the facility will not become intensely annoyed with the sound emitted by the plant. The engineering approach is often different in each of these cases.

 

Noise control solutions

At the source

Modifications at the source of sound are usually considered to be the best solution for a noise control problem either being the most difficult approach. The noise at the source strictly depends on the design process the machinery has been through and in some cases, on its maintenance as well. For example, excessive noise from a roller bearing in a machine may indicate wear failure in one of the rollers in the bearing or, there may be areas, such as panel coverings, that vibrate excessively on a machine.

To determine whether this approach is feasible, the engineers would need in-depth information about the process in which the equipment is taking place and on the machine itself.

On the transmission path

Modifying the path through which the noise is propagated is often used when modification of the noise source is not possible, not practical, or not economically feasible. For noise sources located outdoors or indoors, the transmission path may be modified by placing a wall or barrier between the source and receiver. The use of a barrier will not be effective in noise reduction indoors when the sound transmitted directly from the source to the receiver is much less significant than the sound transmitted indirectly to the receiver through reflections on the room surfaces. In this case, A very effective noise control procedure is to place an acoustic enclosure around the sound source or to arrange the receiver in a soundproofed cabin. The exhaust noise from engines, fans, and turbines is instead controlled by using mufflers or silencers in the exhaust line for the device.

At the receiver

The human ear is the usual ‘‘receiver’’ for noise, and there is a limited amount of modification that can be done for the person’s ear. One possible approach to limit the noise exposure of a worker to industrial noise is to limit the time during which the person is exposed to high noise levels. In other cases, to reduce the sound level to which the workers are exposed, hearing protectors (earplugs or acoustic muffs) can be effective, preventing noise-induced hearing loss in industrial environments.

Conclusions

What are the benefits to apply soundproofing solutions to your industrial facility?

  • Provide a safe work environment by helping to reduce accidents caused by poor communication
  • Prevent hearing loss
  • Increase productivity by decreasing distractions
  • Reduce complaints from neighboring businesses and residents

Soundproofing comes in many forms and does a great deal of work to create an environment conducive to productivity, effective communication, and privacy. No matter the industry, taking the time to factor the sonic landscape of a property into your plans will pay dividends in the future.

Industrial plants are often complex facilities, requiring individualized noise control solutions. For every reason why you would need to solve for each of the many different types of industrial noise, there exists a solution. As such, it’s important to consult experts in the field of industrial acoustics to solve for each individually.

Stopson Italiana has worked nationally and internationally for 50+ years with plant processing engineers and their consulting teams to provide accurate and cost-efficient, site-wide noise assessments and mitigation solutions for industrial sectors across many industries.

 

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Engineering Noise reduction for Hydroelectric power plant

Steps that can be taken to help mitigate excessive noise in the hydroelectricity industries

Since the amount of machinery, such as turbines, air compressors, and rotors associated with each generating unit, noise production in Hydroelectric power plants is high.

Introduction

The human body has few resources to defend itself from noise. This alteration can create many effects on the human organism including contemporary stress that changes working behavior, produces low productivity, high rates of absences from work and obviously hearing loss.

Hydroelectric Power Plants generate lots of power and sometimes excessive noise. Among hydropower plants, there are some built more than half a century ago, and the noise was not factored into plant design. To confirm that, most power plants have hard concrete walls that magnify sound. What happens is that energy doesn’t go anywhere, it just bounces off the walls. And that tends to increase the noise levels even way above the source.

To capture the noise profile and target even the subtlest reverberations, Soundproofing experts must perform acoustic surveys using cutting-edge analytical equipment to isolate hazardous noise sources.


HYDROELECTRIC POWER PLANTS NOISE AND THE CONNECTION WITH THE MARINE SECTOR

“In marine vessels and submarines stationed across the globe, noise suppression technologies have been successfully used in engine rooms since the 1970s. They’ve put a lot of effort into making sure that a marine vessel is very quiet, so their engine rooms are really similar to a hydropower plant, with thick walls, and water all around. There may be a connection, relationship there and sure enough, it was. So, choosing a partner with strong expertise in the marine sector will help to solve noise concerns in these peculiar power plants.” LEARN MORE


Soundproofing Hydroelectric Plant

To mitigate noise, soundproofing experts must analyze and design solutions for treating the noise at the source (if possible), but, due to plant complexity, frequently the plan involves treating the transmission path to the receiver.

While designing soundproofing solutions, maintenance considerations must be taken into account in suggesting noise control techniques for hydroelectric power plants. Materials and methods need to be as maintenance-free as possible and still able to achieve the desired noise reduction level. Used materials also need to meet safety regulations for fire, smoke, and toxicity.

Here are some examples of soundproofing solutions for Hydroelectric stations:

  • Damping

Damping is a term used to describe applying a viscoelastic material to a structure to reduce the vibration of that structure. Since noise (acoustical energy) can be generated by a structure that vibrates and is an efficient radiator, reducing the surface velocity due to damping will also reduce noise.

  • Sound Absorption

Silencers are the most well-known example for absorbing energy to reduce noise. By adjusting the specifications of the silencers, acoustical energy at certain frequencies will be “trapped” within the silencer body and will dissipate.

  • Acoustic Barriers

The concept behind an acoustic barrier is simple. By placing a solid wall (barrier) between the sound source and the receiver, the acoustical energy gets reflected back to the source and will not reach the receiver, thus reducing overall noise. Acoustic enclosures and barriers are ideal for spaces where frequent access is required, yet a significant reduction in the transmission of acoustical energy is desired, such as a turbine pit.


CASE STUDY: ENEL GREEN POWER

Included in the supply are the previous surveys, the design, the construction, the installation, and the photometric measurements of an acoustic booth…(READ MORE)


Conclusion

Because of the variety of contributing noise sources in Hydroelectric plants, there is no one-size-fits-all solution. Due to the complexity of the acoustical challenges this sector faces, a tailored solution is required to ensure the deployment of effective noise control systems.

Following an initial consultation path with a leading industrial and environmental noise control manufacturer, is the quickest and most effective way to solve complex noise mitigation challenges.

Stopson Italiana has worked internationally with plant processing engineers and their consulting teams to provide accurate and cost-efficient, site-wide noise assessments and mitigation solutions of industrial sectors such as petrochemical complexes both large and small.

CONTACT US!






Industrial Soundproofing for Marine Engines

Marine noise considerations and solutions

Safety first, safety always. The primary purpose of installing industrial sound proofers in marine engines is to ensure minimal exposure of people (personnel to noise hazards).

By effectively applying sound proofers to marine engines, chronic hazards like partial deafness, tinnitus, threshold shift in hearing, and noise-induced hearing loss can be effectively avoided.

The maritime industry bears certain similarities to the aviation industry regarding compliance with full safety regulations by local and international regulatory bodies. This may be attributed to the high risks involved and the nature of their operations.
Special noise safety laws and regulations have been provided and reviewed as deemed fit within the industry over the past couple of years. Expectedly, strict implementation of these laws is expected from the employers and employees in the maritime business. This implies that compliance with these regulatory standards is a moral responsibility for all shareholders.

Industrial soundproofing of marine engines is one of the many recommendations by noise hazard safety experts adopted into the maritime standards and policies. Marine engines generate excessive noise above the acceptable limit of sound (< 85 decibels). It has necessitated the design of marine engines with soundproofs and the need for alterations to allow for the installation of soundproofs in marine engines originally lacking soundproofing.

Sounds and an excess of it (noise) results primarily from the amphibious engines and secondarily from engines in onboard mechanical or electro-mechanical systems. Both noises are undesired and require the development of methodologies to mitigate them.

How to Mitigate Yacht Sound Pollution with Soundproofing

Experts of noise management and several organizations have developed and mastered containing noise from yacht engines. Some of the most effective noise management techniques are:

  1. Usage of soundproofing barriers:

An adhesive-like material that can easily be fitted like a chewed gum is placed on a body of a plastic pipe. These soundproofing barriers are installed inside the yacht cabins and engine rooms to mitigate the resulting noises.

  1. Use of noise isolation systems:

Noise isolation systems are technological products designed to mitigate potentially harmful noises produced within an area drastically. These devices are strategically positioned and are more effective with an area to a number of device ratio.

  1. Sound Dampening Materials:

Since vibrations from moving parts of marine engines are a major notorious mechanical phenomenon that produces noise, experts use sound dampening materials to lag engine parts, sittings of these engines, nuts, and screw meet points.

  1. Anti-drumming mats:

Excessive noise and vibrations from yacht occupants and engines are managed by using anti-drumming mats made by heavy acoustic foil. These specially made mats are placed at doorways to help curb excessive noise pollution.

  1. Fabrication:

An age-long system of noise control for marine engines is an engineering control that involves the design, fabrication, and installation of a sound-proof cage-like structure around the engine (primarily) and sound-proofing walls of the yacht engine room.

  1. Complete Soundproofed Exhaust system:

Dry and Wet custom exhaust systems are probably the most effective way to soundproof marine engines. Made from Stainless Steel or GRP (Glass Reinforced Polymer).

The difference between Dry and Wet exhaust system

  • Dry Exhaust:

Compare a dry exhaust to the exhaust pipe of the car: a pipe with a flexible connecting piece on the exhaust manifold, discharging the exhaust gases directly to the outside air. A dry muffler is often required to muffle the noise. Cooling water from the engine is added to the exhaust system either externally or at a much later stage. The tubes and pipes are often made of steel to prevent them from melting due to the high temperature. It is a simple system, but with two major drawbacks: it emits intense heat of up to 600°C at the source, and it produces more noise.

  • Wet Exhaust:

It is recognizable by the manifold that is mounted on the engine. This is often custom-made from GRP (Glass Reinforced Polymer). The heated cooling water in the engine is around 60-90°C when it leaves the engine, so it can be perfectly used to cool the 600°C exhaust gases. Water and gases are often not yet mixed in the first section of the exhaust pipe. That is to prevent the water from entering and blocking the gases from exiting the engine. Gases must be able to exit the engine smoothly so as not to compromise the engine performance. At a short distance from the engine, the gases and liquids come together and exit the engine.

To find your best-fitting complete exhaust system to soundproof your engine you might want to take advantage of the experienced industry-leading company SilencERmarine.

SilencERmarine develops, manufactures, and market throughout the world stainless steel and GRP (Glass Reinforced Polymer) silencers, complete exhaust systems (R.I.Na. – Italian Naval Registry, D.N.V., and Lloyd’s Register approved as well as any other approvals required), and all components and accessories needed to install these.

Benefits of Soundproofing

It is important to note that failure to effectively soundproof onboard engines can rack up serious consequences. Some of these consequences may include the deteriorating health of the crew, who are often the first victims of sound pollution to occupational hazards due to longer exposure to noise emanating from onboard engines.

The resultant effect may see yacht owners paying litigation and compensation fees. In addition, non-compliance to regulatory noise limit aboard could incur strict penalties and fines from respective authorities.

The benefits of soundproofing a typical yacht outweighs putting up with the noise encountered during sails. Some of these advantages are:

  1. Improved reputation for yacht owners which is good for business.
  2. Increased ROI by implementing reliable soundproof materials such as Steel dry silencers.
  3. Compliance with regulatory standards thanks to top-tier industry GRP silencers and separators.
  4. Easy detection of mechanical or operational anomalies due to the absence of noise.

Methodologies and Materials to Mitigate Noise in Onboard Engines

The application of these soundproof materials is largely dependent on the design and location of the yacht engine. Since onboard engines could be integrated inside or in the outer parts of the yacht, the preferred application of soundproof materials varies. IMO (International Maritime Organization), the custodian of the Safety At Sea (SAS) internationally, does not compromise its stance regarding maritime safety. For more specificity, noise control is not given less attention.

Sanctions are often meted on violators in a bid to ensure reduced safety challenges on the seas. To avoid such sanctions and penalties from regulatory bodies such as IMO, simply ensure to install sound proofers around marine engine parts and even the yacht’s cabins. If you need expert advice on your soundproofing needs, you can contact www.silencermarine.com

Ultimately, maritime investors, yacht owners, captains, staff crew, visitor crew, and other stakeholders are expected to report cases of noise pollution to relevant authorities as this may be injurious to the health and well-being of the occupants. The health and safety of those on board should be considered as primary and most important. Industrial soundproofing for marine engines is fundamental and should be encouraged internationally and otherwise.

National policymakers should consider creating regulations that border around efficient soundproofing practices.

Turbines and Noise Control

Gas and Steam Turbines noise considerations and solutions

Electrical power consumption has increased rapidly in the past years and consequently, the need for many large power plants has increased. A form of power generation that has emerged is the gas turbine, which has a wide range of applications such as pipeline transmissions of fuels (gas compressors and liquid pumpers), process power plants, peak load electrical power generation, and more recently baseload electrical power generation utilizing a combined cycle of steam and gas. Parallel to this rapid industrial growth and in reaction against it, concern for the protection of the environment has grown, manifesting itself through the issuance of ordinances and recommendations on local, national, and international levels.

Turbines generated noise types

In a standard modular unit, there are various noise sources, here classified into 5 groups according to the location where they are generated: Aerodynamic, Magnetic, Mechanical, Combustion, and Hydraulic:

  1. AERODYNAMIC

The origin of this noise is the direct excitation of the air or gas by a flowing medium or the interaction of the flow with fixed or movable obstacles within the turbines themselves. This type of noise usually comes from:

  • Flange-to-Flange
  • Vent
  • Gas Valves
  1. MAGNETIC

Although these noises do not always constitute a major source in the overall noise generated by a power station, their presence is not tolerated because of the pure tone at 100 Hz of their sound power. These noises result from alternating magnetic forces due to electrical current and involve in general the generator and the transformer.

  1. MECHANICAL

The mechanical noise that does occur results from a slight unbalance bearing friction, rotational impulses, and torque transmission, in the case of load gear. However, due to the quality of the rotating components and the precision manufacturing required for gas turbines, low sound emissions are generated.
The average low vibration levels measured at the installations underscore the general manufacturing quality of this equipment.

  1. COMBUSTION

Combustion noises, rich in low frequencies, depending on different turbine’s assets: the quantity of the heat released, the geometry of the flame, the nature of the fuel, and the type of fuel nozzle used.

  1. HYDRAULIC

The generation mechanism of this type of noise is the same as for aerodynamic noises with the additional problem of possible cavitation. The high-pressure fuel pump and the flow divider constitute point power sources close to 110 dBA. At some representative complexes, it was observed that their noise was conducted along with the fuel piping, which acted as a line source.

 

The large number and variety of noise sources force plant operators to face hard challenges when trying to find a comprehensive solution for noise coming from gas (or steam) turbines.

Soundproofing your Turbine

The easiest solution would be to wrap the equipment with an acoustic enclosure and solve the problem right at the source. It might not be as easy as it sounds, acoustic enclosures are not standard products and are often customized on clients/equipment needs. Not just that, noise control plans are inclined to be comprehensive for the operation complex as a whole and not just for the turbine itself.

Due to the vast amount of noise sources within the turbine and the variety of noise types that they spring, the most cost-effective approach is a comprehensive noise program, to take place with a specialized partner able to provide custom and complete soundproofing solutions.

Selecting a trustable partner that is specialized in specific products in the field of power plant noise reduction is the ideal answer to the challenges you are facing. Approaching the consultation path with a leading industrial and environmental noise control manufacturer is the quickest and most effective way to solve complex noise mitigation challenges.

Stopson Italiana has worked nationally and internationally for 50+ years with plant processing engineers and their consulting teams to provide accurate and cost-efficient, site-wide noise assessments and mitigation solutions for industrial sectors such as Power Generation plants.

 

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Stopson Italiana solutions

 

Stopson Italiana represents an A-Z solution to control noise in Power plants. Innovative engineering and design solutions deal with practical challenges when implementing our soundproofing systems.

Working on-site with HSE, Operation, and Plant Managers, we believe that effective noise control is a cooperative process between Stopson Italiana and our clients. From initial assessment and noise sources identification to the final result, we provide tailor-made noise control solutions that fulfill the needs of our customers and their industries.

 

⟶ For More Information about Stopson Italiana soundproofing offer click HERE 

Soundproofing for Manufacturing Facilities

What are the challenges for sound insulation in industrial buildings and facilities?

Sound insulation in industrial buildings and factories has two main goals: to reduce noise for employees in the facility and soundproofing for the outside.
This should prevent noise from becoming a problem for neighbors and residents.

Noise in Manufacturing Processes

Soundproofing for large manufacturing factories and facilities is a challenging task mostly because there are several noisy types of equipment that usually run at the same time within the complex:

  • Vibrating panels
  • Fans
  • Air-flow
  • Impact processes
  • Engines
  • Processors
  • Other manufacturing equipment

The large number and variety of equipment within the plant force plant operators to face unique challenges when trying to find a comprehensive solution for noise mitigation.

This combination of different noise sources can contribute to the overall noise levels. But it is not only the numerous sound sources in the facility that influence the selection of the right sound insulation elements but also the structural features of the environment in which the source takes place. For example, Sound-reflecting surfaces, e.g. concrete, stone, or metal, along with high ceilings and wide rooms, can cause strong reverberation and long reverberation times.

Sound Insulation for Manufacturing

How the noise is controlled is dependent on the source. For instance, external noise caused by HVAC units or process pumps is assessed and treated differently to internal noise sources such as plant machinery.

There are several possibilities for soundproofing in manufacturing facilities. Noise can be dampened, for example, by using soundproofing solutions on individual machines and devices such as acoustic enclosures or different types of silencers.

Because of the variety of contributing noise sources in this kind of facility, there is no one-size-fits-all solution. Due to the complexity of the acoustical challenges this sector face, a tailored solution is required to ensure the deployment of effective noise control systems.

Following an initial consultation path with a leading industrial and environmental noise control manufacturer, is the quickest and most effective way to solve complex noise mitigation challenges.

Stopson Italiana has worked internationally with plant processing engineers and their consulting teams to provide accurate and cost-efficient, site-wide noise assessments and mitigation solutions of industrial sectors such as petrochemical complexes both large and small.

 

 CONTACT US!






 

 

Stopson Italiana solutions for Manufacturing plants

 

Stopson Italiana provides a complete solution to help our customers control manufacturing complex’s noise concerns. Innovative engineering and design solutions deal with practical challenges when implementing our soundproofing systems.

Working on-site with HSE, Operation, and Plant Managers, we believe that effective noise control is a cooperative process between Stopson Italiana and our clients. From initial assessment and noise sources identification to the final result, we provide tailor-made noise control solutions that fulfill the needs of our customers and their industries.

Our offer includes:

  • SILENCERS
    Absorptive for cold and hot gases, reactive for engines or small boilers exhaust, combined absorptive and reactive for venting systems. Circular or rectangular shape, atmospheric or pressurized for any gas, temperature range, and applications, providing sound attenuation up to 70 dB and reduce residual noise to a sustainable level. → KNOW MORE

 

  • BARRIERS & ENCLOSURES
    Shaped around noisy equipment, indoor or outdoor, on-base or off-base, designed to provide optimum noise attenuation in any critical environment. Made of modular acoustic panels and linings for sound isolation while ensuring equipment maintenance, ventilation, weather protection, and fire safety.KNOW MORE

 

⟶ For More Information about Stopson Italiana soundproofing solutions click HERE 

Noise reduction in Petrochemical plants

Tackling Noise Containment in Petrochemical facilities: Concept, Principle and Challenges

Oil and gas infrastructure, from extraction, to refining and processing, to pipeline transmission and distribution make use of some of the largest, most powerful, and noisy equipment within the whole industrial sector.

Processes such as hydro-cracking, distillation, liquefaction, and regasification involve large scale compressors, furnaces, gas-turbines, fan-cooled heat exchangers, and large-scale evaporative cooling systems are well known to be noisy.

Acoustical challenges in petrochemical processes

Petrochemical plants face complex acoustical engineering challenges. Petrochemical processes operate largely outdoors, these operations, which include pumps, compressors, blowers, agitators, and coolers, run out in the open, with limited barriers in place to restrict equipment noise from going beyond the confines of the plant.

These plants, as we said, include large numbers of industrial tools and often moving high volumes of air or gas while operating at really high pressures and temperatures. All these combined means that such areas can be exceptionally noisy. Moreover, the large number and variety of equipment within the plant force plant operators to face unique challenges when trying to find a comprehensive solution for noise mitigation.

With noise control and environmental legislation becoming more stringent and the employee health and safety that stay at the forefront of all processing practices, ensuring that noise is effectively mitigated has become a key concern for process plant operators across the petrochemical and chemical processing sector.

Solutions

Plant operators across the industry should be considering that soundproofing installations are not the same twice, careful consideration must be given to each system’s function, permitted noise levels, and much more to determine the most effective noise control solution for the application. As a result, when it comes to specifying what is the perfect noise mitigation product for on-site equipment in such environments, there is no one-size-fits-all solution and several factors must be analyzed.

Noise control measures for such industrial plant items can be particularly complex to design from an acoustic perspective, given a large number of noise sources. Besides, any housings or anything else that is fitted around the equipment can present significant challenges for the ventilation of the analyzed equipment.

Following an initial consultation path with a leading industrial and environmental noise control manufacturer, is the quickest and most effective way to solve complex noise mitigation challenges.

Stopson Italiana has worked internationally with plant processing engineers and their consulting teams to provide accurate and cost-efficient, site-wide noise assessments and mitigation solutions of industrial sectors such as petrochemical complexes both large and small.

 

 CONTACT US!






 

 

Stopson Italiana solutions for Petrochemical plants

 

Stopson Italiana approach focuses on providing an optimal acoustic response, which satisfies functional requirements with the best price/performance ratio.

Our offer includes:

  • SILENCERS
    Absorptive for cold and hot gases, reactive for engines or small boilers exhaust, combined absorptive and reactive for venting systems. Circular or rectangular shape, atmospheric or pressurized for any gas, temperature range, and applications, providing sound attenuation up to 70 dB and reduce residual noise to a sustainable level. → KNOW MORE

 

  • BARRIERS & ENCLOSURES
    Shaped around noisy equipment, indoor or outdoor, on-base or off-base, designed to provide optimum noise attenuation in any critical environment. Made of modular acoustic panels and linings for sound isolation while ensuring equipment maintenance, ventilation, weather protection, and fire safety.KNOW MORE

 

⟶ For More Information about Stopson Italiana soundproofing solutions click HERE 

Noise containment in Cogeneration plants

Despite its efficiency and environmental advantages, CHP still has its issues, most notably the excessive noise levels it can produce.

The benefits of cogeneration are well known, with these systems typically cutting costs by around 20% compared to the other existing solutions. CHP can also significantly reduce emissions cost-effectively due to the possibility to be applied to existing energy equipment. Such benefits, combined with the short ROI they can bring, have seen a rise in cogeneration installations.

Due to the increasing spread of CHP plants, noise mitigation has been a key point to meet regulatory and environmental noise requirements.

What are the noise sources?

There are a few components within and connected to the CHP system that can cause noise:

  • Engine
  • Boiler
  • Exhaust system
  • Ventilation systems
  • Fans or radiators
  • Vibration from equipment

A responsible supplier will look at all the various elements in the system to identify the noise source and therefore mitigate that noise. Your supplier should have options for noise attenuation across the system that can adapt to specific equipment needs. Health and safety compliance is paramount as workers need to be in a safe environment that operates to the safest noise levels.
Assigning the entire CHP plant (or at least the main equipment) noise abatement study to a single provider will facilitate a one-stop-shop solution for either the vendor and the operator with the aim of a total peace-of-mind targeted approach.

Noise reduction in CHP systems

When specifying the right noise control products and installations methods for CHP, detailed consideration of the specific system’s functions, location and permitted noise levels, as well as other pertinent factors, is required.

CHP systems should always be paired with some kind of acoustic enclosure which provides total protection against noise by isolating the source. It is important to be aware that the enclosure allows access for maintenance of the CHP unit, which will not compromise any noise mitigation.

Engine

Different engines have different noise profiles and designs so noise reduction must be balanced to that. Your Soundproofing partner should advise you with the noise reduction systems best designed to mitigate either the in-duct and the break-out noise to the targeted residual level at the desired measurement point.

Boiler

Industrial plants, where boilers are used, need an effective degree of soundproofing.
Continuous and intermittent Vents to the atmosphere have to be silenced to the desired residual SPL, but sometimes due to their big dimension and the high Sound Power Level, the boiler structure itself has to be sound-proofed.

Exhaust

Similar consideration must be done for the exhaust system that should be implemented with a separate silencer located in the proximity of the flue. These exhaust silencers must meet the system requirements, without creating an excessive pressure drop as this can affect the CHP performance and efficiency.

Ventilation systems

Noise from the ventilation systems should be reduced by the use of a Silencer. Solutions as Ventilation & Duct Silencers reduce the generator In-duct noise and should be designed specifically for the application and to meet the customer needs.

Fan or Radiators (Auxiliary equipment)

For other equipment such as fans or radiators, often located near the CHP, the soundproofing solution need to be selected appropriately for the target noise rating required.

 

Stopson Italiana solutions for CHP

With an increasing demand for CHP systems across many sectors, stringent noise legislation, together with a general non-acceptance of environmental noise from industrial facilities, the implementation of soundproofing solutions is now a necessity for companies looking to significantly reduce their noise output.

However, as every plant installation is unique, there is no one-size-fits-all solution. Due to the need for detailed analysis, complex custom design, the variability of possible solutions and the regulatory requirements the necessity of a certified and experienced soundproofing supplier has emerged.

Stopson Italiana approach focuses on providing an optimal acoustic response, which satisfies functional requirements with the best price/performance ratio.

 

  • VENT SILENCERS
    Circular or rectangular shape, atmospheric or pressurized for any gas, temperature range, 
and applications, providing sound attenuation up to 70 dB and reduce residual noise to a sustainable level. → KNOW MORE

 

  • EXHAUST SILENCERS
    Conceived for engine exhaust these silencers are designed to be used on diesel and gas engines and, in certain cases, on industrial low/middle power gas turbines. Developed in our research Lab and tested on numerous industrial applications, our exhaust silencers are based on absorption and/or resonance sound wave attenuation principle. → KNOW MORE

 

  • VENTILATION & DUCT SILENCERS
    Ventilation and Duct Silencers, both of rectangular or cylindrical shape, have been designed to reduce noise level through the duct generated by any sound source, such as fans, conditioning units, etc. Low/high flow rates and available pressure drops can be achieved, depending on the type of source. → KNOW MORE

 

  • BARRIERS & ENCLOSURES
    Shaped around noisy equipment, indoor or outdoor, on-base or off-base, designed to provide optimum noise attenuation in any critical environment. Made of modular acoustic panels and linings for sound isolation while ensuring equipment maintenance, ventilation, weather protection, and fire safety. → KNOW MORE

 

⟶ For More Information about Stopson Italiana soundproofing solutions click HERE 

Can noise affect workers’ productivity and accuracy?

Loud noise levels in the offshore oil industry torment workers with hearing damage and tinnitus.

Many workplaces have noise levels that are too loud for the human ear. In the long term, a loud working environment can consequently be damaging to your hearing health, therefore it affects workers’ productivity and accuracy.

Offshore oil rigs and platforms are examples of such noisy workplaces. In 2001, more than 800 workers in Norway reported hearing damage or tinnitus as a result of their line of work.

A study from 2009-2011 by PSA, the Petroleum Safety Authority of Norway, shows that 37% of workers in offshore oil productions are affected by damage to their hearing.

The importance of prevention

The National Association of Hearing Impaired in Norway, HLF, underlines the importance of hearing damage prevention and suggests lowering the noise level through usage of acoustic enclosures and silencers.

Organizations need to carefully think about the design of their workplace and how to manage noise levels. The negative effects of noise on employees can have financial impacts comparable with the positive impact of investing in acoustic improvements. Therefore, it makes good business sense to invest.

The impact of noise on performance

The British Journal of Psychology published a study that asked workers to perform two tasks, firstly tested without noise and then with a recording of general noise. The test with noise showed a decrease in the accuracy of their work by almost 67%. This test was made introducing noise at levels there are very low compared to offshore plants’ noise, it’s logic to predict that this percentage would increase when speaking of high-noise environments such as power generation plant or offshore platform.

Noise is very stressful and it can leave workers physically and mentally shaken. Prolonged exposure to loud noises can trigger physiologic stress responses in our bodies, including high blood pressure and an increased heart rate.

Studies show that workers are almost 65% less productive in a noisy work environment than employees who work in much quieter workplaces.

Moreover, HLF underlines that a person with reduced hearing is more likely to become physically exhausted at the end of a workday.

Acoustic solutions to mitigate noise

Stopson Italiana has been present for decades in the world market of soundproofing as one of the leading producers of acoustic enclosure, control cabins, and silencers.

Soundproofing solutions reduce noise pollution due to various sources and efficiently respond to any client’s needs.

  • SILENCERS
    Absorptive for cold and hot gases, reactive for engines or small boilers exhaust, combined absorptive and reactive for venting systems. Circular or rectangular shape, atmospheric or pressurized for any gas, temperature range, and applications, providing sound attenuation up to 70 dB and reduce residual noise to a sustainable level.
  • BARRIERS & ENCLOSURES
    Shaped around noisy equipment, indoor or outdoor, on-base or off-base, designed to provide optimum noise attenuation in any critical environment. Made of modular acoustic panels and linings for sound isolation while ensuring equipment maintenance, ventilation, weather protection, and fire safety.

On-Site tests to make facilities/plants compliant

Together with its soundproofing products, Stopson Italiana provides on-site services making sure to fulfill the customer needs and meet the highest quality standards.

⟶ For More Information about Stopson Italiana soundproofing solutions click HERE 

Fundamentals of noise control in Power Generation plant

The science behind the sound mitigation solution applied to power plants.

Soundproofing refers to the processes involved in checking the sound from entering or leaving a specified area by absorbing and/ or mitigating the sound. Soundproofing mechanisms can be employed in several situations, especially industries notorious for sound pollution mostly attributed to the use of heavy-duty machinery, Power Generation plants are part of these.

 

Noise pollution source in power generation plants

There are numerous main sources of noise within a power plant and only a few of the major causes are taken in the exam here.

The sound power level from equipment can spread from about 120 dB to over 155 dB depending on the size and type of machine. There is no easy method to generally categorize one unit as being noisier than another, in fact, the amount of MWs turbine produce does not directly affect the noise they produce. However, diesel engines are more predictable, and generally, the higher the horsepower or kilowatt rating, the higher the noise level because more cylinders and fuel are needed.

Here is a list of some of the common noise source in power plants:

  • Combustion turbine (CT)
  • Heat recovery steam generator
  • Diesel engine
  • Superchargers on diesel engines
  • Steam generators, regulators, by-pass and control valves and piping
  • Air-cooled condensers (ACC)
  • Cooling towers, produce fan and gearbox noises
  • Fuel gas pressure regulating, metering and valve stations
  • Main step-up transformers
  • Condensate pumps, condenser units, and associated piping
  • Piping and pipe hangers not acoustically isolated from structures
  • Blow-off and venting processes
  • Remote water-pumping stations.

The sound emissions from power generation equipment can be reduced by applying noise control devices.

 

Sound Field Definition

To analyze noise from equipment, we need to define the sound field – that is, how the sound will propagate from the equipment or the sources of noise. Near field, far field, free field, and reverberant field are frequently mentioned. These are regions that describe certain characteristics of sound propagation as illustrated in the Figure.

Descriptions according to ISO 12001:2009

  • Near field
    • The near field of a source is the region close to a source where the sound pressure and acoustic particle velocity are not in phase.
  • Far field
    • The far field of a source begins where the near field ends and extends to infinity. Note that the transition from near to far field is gradual in the transition region. In the far field, the direct field radiated by most machinery sources will decay at the rate of about 6 dB each time the distance from the source is doubled.
  • Free field
    • The free field is a region in space where sound may propagate free from any form of obstruction.
  • Reverberant field
    • The reverberant field of a source is defined as that part of the sound field radiated by a source that has experienced at least one reflection from a boundary of the room or enclosure containing the source.

Fundamentals of Noise Control

Noise control or mitigation involves several steps, and the amount of noise reduction is driven by having to meet an environmental noise limit or some regulatory limit, not to mention workers’ safety. A simple model using the classical approach to noise control (shown below) allows the examination of the options for effective and economical noise control:

source of noise → path of noise →received noise

Solutions

Applying noise control involves affecting one of these three elements. Most often it is the ‘path of noise’ that is controlled by the use of acoustic enclosures, barrier walls, silencers, and other similar noise control treatments. This method is the most widely used as the degree of noise control can be tailored depending upon the noise requirements and generally it is the more economical approach. The control on the ‘source of noise’ can be expensive because it may require a complete redesign and retooling process which takes time and money.

For new plants, examine the structure arrangement and locate the noisiest equipment or operations away from noise-sensitive areas. Grouping smaller sources together can be beneficial in that a common noise barrier or enclosure can solve a lot of small problems.

 

Stopson Italiana Soundproofing Solutions

Enclosures and Barriers

Shaped around noisy equipment, indoor or outdoor, on-base or off-base, designed to provide optimum noise attenuation in any critical environment. Made of modular acoustic panels and linings for sound isolation while ensuring equipment maintenance, ventilation, weather protection, and fire safety.

  • Noise abatement by 15dB(A) to 50dB(A)+
  • Vibration absorbers, anti-shock systems with noise control settings
  • Combustion air intake Unit with optional air filtration
  • Exhaust gas removal for combustion engines
  • Indoor/Outdoor Applications

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Silencer and other solutions are available at Stopson Italiana, Check-out all the soundproofing products.

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10 Steps to choose the right Soundproofing Materials

Soundproofing Materials: 10 Steps to choose the right one and how to test their effectiveness in the Industrial context.

 

Soundproofing refers to the processes involved in checking the sound from entering or leaving a specified area by absorbing and/ or mitigating the sound. Soundproofing mechanisms can be employed in a number of situations, some of which may include private homes, religious centers, offices, studios, and most especially industries notorious for sound pollution mostly attributed to the use of heavy-duty machinery.

Over the years, it has been discovered that noise pollution has the potential of causing damage to our health than we initially conceived. And as a result of these findings, employers of labor owe their employees good working conditions and a safe working environment, which typically involves a working area that dissipates noise levels below standardized noise thresholds. 

What’s more, it’s common knowledge that a noisy environment negatively affects concentration and attentiveness, and would drastically reduce productivity and the quality of service.

More negative effects

Noise pollution doesn’t stop there, it also targets the psychological health of its victims and can trigger health issues such as high blood pressure, hearing impairments, stress, and insomnia. In truth, the list is inexhaustible. 

Most industries the world over understand the importance of the health of employees, yet cannot afford to get rid of such heavy-duty machinery due to a lack of quieter alternatives. To solve this problem, it is best to lock in the noise that these machines produce by the installation of quality soundproofing materials.

 

Soundproofing Materials and How They Work

As was earlier stated, soundproofing simply refers to mitigating the noise within a certain area. This is achievable by installing certain materials (insulators) that trap sound and absorb them. 

There exist different types of soundproofing materials and you’d need to consider a lot of factors like the kind of building to be soundproofed and the intensity of noise to be absorbed among many other factors.

Here are a few soundproofing materials used in for industrial soundproofing applications:

 

  • Mineral Wool (Rockwool Rockboard)
  • Soundproof Fiberglass (Owens Corning 703)
  • Acoustic Fiberglass.
  • Acoustic Foam Panels.
  • Echo Absorber™ Acoustic Cotton.
  • Fabric Wrapped Acoustic Panels.
  • Fire Rated Foam. 

 

Ten Steps towards choosing the right soundproofing material

 

There are no wrong materials when it comes to soundproofing, it really just depends on what you aim to achieve. We have, however, come up with 10 guidelines to be followed when choosing soundproofing materials in order to get the best out of soundproofing.

 

 

 

  • The level/Source of Noise: The level of noise that is to be locked out or in, goes a long way in deciding the kind of materials to use. For minimal noise, soft, specially designed foams can help to absorb the noise, but for noise emanating from heavy-duty machinery, more advanced noise insulators may be adopted.

 

  • Propagation of Noise: Noise can either be airborne or structure-borne. To get the best materials for soundproofing, you would need to first determine how the noise travels from the original source to the receiver. This is because some insulators are suited for airborne noise transmission and may be quite ineffective for noise that is structured-based and vice versa.

 

  • What are these materials are made of: Some soundproofing materials are more eco-friendly than others, and should generally influence the choice of materials. Some others may include flammable agents which may not be suitable for certain applications.

 

  • Thermal Insulation: Some soundproofing materials carry with them some thermal insulation features, which helps to reduce heat also. It is advisable to get these types of soundproofing materials for cost-effectiveness and the added advantage, especially in an industrial setting.

 

  • Ease of Installation and Maintenance: When choosing soundproofing materials, it’s advisable that opt for the ones that are easier to install for time maximization. For example, when decoupling walls and ceilings to keep sound front traveling through them, it is best to make use of the resilient sound clips instead of resilient channels because they are easier to install.

 

  • Why are you soundproofing? In choosing the right materials, you must understand the purpose for which you are soundproofing in the first place. If the aim is to lock sound in, you should not consider soundproofing materials like the mass loaded vinyl which is specifically designed to keep sound out.

 

  • Additional soundproofing: If you are looking to cover the loopholes that may remain after general soundproofing, you should consider getting additional soundproofing such as the under door draft stopper as it seals the small gap between the bottom of the door and the floor, and ensures that there are no under-door spaces that could let noise penetrate or escape.

 

  • What parts of the area are most important? You should also determine what parts of the noise prone workspace you want to focus on when soundproofing, as this will help to decide the kind of materials to look out for. For example, the weather stripping can only be used to seal gaps around doors and windows, hence it should not be considered for soundproofing walls.

 

  • The best material wins: It is of paramount importance to purchase the best quality materials affordable. You can seek expert opinion in deciding what materials are of the best quality based on your proposed applications. Low-quality materials will only bring you discomfort in the long run and in some cases a potential industrial hazard.

 

  • Soundproofing windows: When soundproofing windows, the use of double-glazed windows may fail miserably to effectively mitigate noise pollution, hence, you may opt for thick glass as a more functional alternative. The thicker the glass, the better the results. 

 

How to Test the Effectiveness of Your Soundproofing Materials 

To ensure that you are purchasing the best and most effective soundproofing materials for your industry, it is best to run a series of tests. Here are some methods to employ in testing the effectiveness of soundproofing materials:

  • Making use of Impedance tools: The impedance tube is pretty much a tube with circular ends. There are different types based on size, shape, and material used in making it. This tube can be used in free field situations to test the transfer of sound in a bid to understand the specific soundproofing needs.

 

  • The impact insulation class: This is used to test sound-blocking floor soundproofing products. There are other products such as the impact insulation class that test other soundproofing efficiency of other parts of a workspace. 

 

  • If your industry related noise challenges require that you test how effective sound-blocking materials are for ceilings and walls, you may use the CAC and STC respectively.

 

  • For sound absorption material testing, the NRC is your best method. NRC is the comparing of different sound absorption levels through the use of speakers and microphones.

Stopson Italiana produces customized solutions according to the client’s needs. The main soundproofing solutions can be collected in 2 categories:

Silencers

Absorptive for cold and hot gases, reactive for engines or small boilers exhaust, combined absorptive and reactive for venting systems. Circular or rectangular shape, atmospheric or pressurized for any gas, temperature range 
, and applications providing sound attenuation up to 70 dB and reduce residual noise to a sustainable level.

→Read more

Enclosures and Barriers

Shaped around noisy equipment, indoor or outdoor, on-base or off-base, designed to provide optimum noise attenuation in any critical environment. Made of modular acoustic panels and linings for sound isolation while ensuring equipment maintenance, ventilation, weather protection, and fire safety.

→Read more