Noise Control Applications

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  • Category: Air & Climate ×

  • Subcategory: Noise Control ×

Noise monitoring for industrial sites

by Larson Davis, a division of PCB Piezotronics     based in Depew, NEW YORK (USA)

Industrial noise generated from plants, mills, refineries, shipping docks, utilities, and more, impact the quality of the surrounding community.  By controlling and monitoring this noise a community and industry can establish a working relationship that will benefit all.  An effective noise monitoring program will allow an industrial site to understand the noise sources and time periods that are causing concerns and then develop a plan for mitigation.

For Sports Facilities

by Troy Acoustics Corporation     based in Brunswick, GEORGIA (US) (USA)

Troy Acoustics and its personnel have been involved in the Broadcasting, Movie and Recording industries for well over thirty years. Troy Acoustics has designed and installed acoustical treatments for dozens of facilities, for both new and updating purposes. The Troy System products, designs and installation techniques have provided quality, noise free, environments for all types of facilities where original programming is produced, enhanced or modified.

Noise monitoring solutions for Pass-by noise testing

by Brüel & Kjær Sound & Vibration Measurement A/S     based in Nærum, DENMARK

Traditional Field Pass-by measurements are still the only way to certify a vehicle for exterior noise emission during operation, but Indoor Pass-by provides an extremely powerful and repeatable method of troubleshooting exterior vehicle noise in the controlled environment ofan anechoic chamber.

Noise monitoring solutions for material testing

by Brüel & Kjær Sound & Vibration Measurement A/S     based in Nærum, DENMARK

With today`s growing focus on noise control issues and the emergence of sound quality as an important aspect of product design, acoustic material testing is becoming increasingly relevant to engineers, designers and manufacturers from a broad range of industries. Acoustic material testing is the process by which the acoustic characteristics of materials are determined in terms of absorption, reflection, impedance, and admittance, including transmission loss.

Noise monitoring solutions for urban noise

by Brüel & Kjær Sound & Vibration Measurement A/S     based in Nærum, DENMARK

The sounds in a city are central to our quality of life. Constant exposure to noise effects both our physical and psychological health, and our ability to learn and communicate.

2-Channel sound insulation for building acoustics

by Brüel & Kjær Sound & Vibration Measurement A/S     based in Nærum, DENMARK

Façade sound insulation is measured like sound insulation between rooms, except that one `room` is actually open space. The sound level is measured inside the receiving room and outside the façade of the building. The level difference is then corrected for the influence of the reverberation time and background noise level in the receiving room. Finally a single-number index is calculated by averaging over all the frequency bands. A loudspeaker source can be used for the measurement, giving a choice of sound incidence angle. But in practice, placing the loudspeaker and getting a high enough sound level can be difficult.

Noise monitoring for railways and trains

by Larson Davis, a division of PCB Piezotronics     based in Depew, NEW YORK (USA)

Controlling and monitoring railway and train noise in residential and urban areas is a critical function of a railway. The noise generated can be dependent upon the engine, rail cars, rail construction, train speed, and the horn. Modern high speed trains have also created new levels of high frequency noise that create an acoustic disturbance that sounds like an aircraft going by.

Noise and vibration monitoring for race circuit monitoring

by ACOEM     based in Limonest, FRANCE

Certain leisure activities, and motor sports in particular, are a source of elevated noise levels. They cause significant disturbance for nearby residents, particularly as such sites are being developed in increasingly densely populated urban areas.

Noise and vibration monitoring for the construction site

by ACOEM     based in Limonest, FRANCE

By implementing a noise and vibration monitoring system, the impact of construction site activities can be managed by: Complying with legal requirements relating to public health sanctioning the absence of appropriate precautions to limit abnormally high levels of noise and vibrations. Taking environmental quality considerations into account (HQE approach). Limiting noise and vibration pollution with the comfort of neighbouring residents in mind. Enabling companies in the public works and construction industry to adopt a transparent approach to communication with local residents, in order to avoid resistance and instead gain their support for a given project. Providing the site manager with reliable and official data, should it be required. 01dB offers solutions for construction professionals to suit the requirements of each building site. It provides them with metrological systems (such as the certified DUO sound level meter, dB4 and MR2002) with 01dB WebMonitoring services to ensure optimal control of noise & vibration impact of the construction work, using as well communication tools intended for the general public.

Pulsar noise testing equipment for workplace sector

by Pulsar Instruments plc     based in Filey, UNITED KINGDOM

Workplace noise monitoring is an interesting subject that can appear complex, but it is always worth remembering what you are trying to achieve. This can be summarised as: ““Minimising or avoiding the risk of noise-induced hearing loss in the workplace to comply with local, noise-based, legislation”” Such legislation is usually based on a European Directive that is then modified to suit the needs of each particular country. For example, in the United Kingdom, the ‘The Control of Noise at Work Regulations 2005’ are based on the European Union Directive 2003/10/EC; usually called “The physical agents (noise)” directive and expanded upon by the Health & Safety Executive.

Noise monitoring solutions for occupational health

by Brüel & Kjær Sound & Vibration Measurement A/S     based in Nærum, DENMARK

Occupational Safety and Health is a major concern throughout the world. Problems such as a broken limb, the loss of an eye or persistent backache have to be dealt with and measures taken to minimise the risk of these things happening at the workplace.

Noise and vibration pollution control for paper industry

by ACOEM     based in Limonest, FRANCE

The paper industry depends upon a continuous industrial process in which the paper machine is the central factor. This system is based on several variable speed rollers mounted on roller-bearing blocks, and damage to a single block can be enough to shut down production for several hours.

Sound Insulation solutions for building acoustics

by Brüel & Kjær Sound & Vibration Measurement A/S     based in Nærum, DENMARK

Sound energy does not remain in the room where it is produced, but propagates throughout the building by any available path, intruding into other rooms as noise. Each country has its own standards of sound insulation in buildings, but it is measured in the same way all over the world. The noise levels in the two rooms under investigation are measured and subtracted, and the level difference is corrected for the influence of the reverberation time and background noise level in the receiving room. The measurements and calculations are made in 1/1- or 1/3-octave bands and averaged over a number of positions in the rooms. Finally a single-number index is calculated by averaging over all the frequency bands.

Variable frequency drive controls AC motors

by Variable Frequency Drives     based in NSW, AUSTRALIA

Consider integrating a variable frequency drive. It often can optimize energy efficiency by enabling you to match motor speed to the demands of the system. Look for opportunities, for example, to replace throttle valves or dampers used to restrict flow. However, a variable frequency drive may not make sense if the load on the motor is relatively small and constant — because speed changes will occur infrequently and any benefits from varying the speed will be negligible. So, thoroughly assess the system load profile to determine the scale and frequency of required speed changes before deciding about installing a variable frequency drive.

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