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Noise Control Applications

  • For Sports Facilities

    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.

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

  • Noise and vibration pollution control for wind power industry

    As a major source of renewable energy, wind turbines are continuing to experience exponential growth, with a production capacity that is doubling every three years. Reliability and the optimisation of maintenance have become major economic challenges for wind turbine operators.

    By ACOEM based in Limonest, FRANCE.

  • Noise monitoring for railways and trains

    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.

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

  • Noise monitoring for industrial sites

    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.

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

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    Noise monitoring solutions for Pass-by noise testing

    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.

  • System Integration Noise Solutions

    Environmental noise monitors that connect directly to process measurement and control systems. Many industrial plants have a variety of process sensors strategically placed around their site so that safety, environmental impact and efficiency can be monitored and managed, in real time, from one or more control rooms.

    By Cirrus Environmental based in Peterborough, UNITED KINGDOM.

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    Noise monitoring solutions for material testing

    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.

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    Noise monitoring solutions for urban noise

    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.

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    Geotextiles solutions for retaining structures areas

    In infrastructure projects in which space has to be saved or land acquisition minimized, TenCate Geosynthetic soil reinforcement technology has been used in the design and construction of steep slopes or walls. The use of this technology increases the stability of such structures.

    By TenCate Geosynthetics Netherlands bv based in AE in Nijverdal, NETHERLANDS.

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    2-Channel sound insulation for building acoustics

    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 and vibration monitoring for race circuit monitoring

    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.

    By ACOEM based in Limonest, FRANCE.

  • Pulsar noise testing equipment for workplace sector

    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.

    By Pulsar Instruments plc based in Filey, UNITED KINGDOM.

  • Noise and vibration monitoring for the construction site

    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.

    By ACOEM based in Limonest, FRANCE.

  • Noise and vibration pollution control for paper industry

    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.

    By ACOEM based in Limonest, FRANCE.

  • Variable frequency drive controls AC motors

    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.

    By Variable Frequency Drives based in NSW, AUSTRALIA.

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    Noise monitoring solutions for occupational health

    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.

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    Sound Insulation solutions for building acoustics

    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.

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