sound absorbing News

  • ASTM C1482 - 11 standard specification for polyimide flexible cellular thermal and sound absorbing insulation

    This specification covers the composition and physical properties of lightweight, flexible open-cell polyimide foam insulation intended for use as thermal and sound-absorbing insulation for a certain temperature range in commercial and industrial environments. The insulations are classified into the following types: Types I, II, III, IV, V, and VI. Polyimide foam shall be manufactured from the ...


    By ASTM International

  • Rising carbon dioxide and ‘acidified` waters in puget sound

    Scientists have discovered that the water chemistry in the Hood Canal and the Puget Sound, US, main basin is becoming more "acidified," or corrosive, as the ocean absorbs more carbon dioxide from the atmosphere. These changes could have considerable impacts on the region"s shellfish industry over the next several decades. The study, co-sponsored by NOAA, the University of Washington Applied ...

  • Green walls show promise as sound barriers for buildings

    Green walls, designed so they are covered in vegetation, could help cut the amount of noise that enters buildings, a new study has found. In lab. tests, researchers found that a modular green wall system reduced sound levels by 15 decibels (dB). This leads them to believe that it is a promising sound reduction device that could improve quality-of-life for city residents. Green walls and green ...

  • Unique surfacing adds sound and feel to the Pentagon Memorial

    On September 11, 2008, seven years after the terrorist attacks at the Pentagon, The Pentagon Memorial was dedicated to the people who lost their lives. The Memorial is structured chronologically based on the ages of the victims, with the 184 individual Memorials placed along Age Lines parallel to the trajectory of American Airlines Flight 77. While the Memorial Units themselves are the central ...


    By Invisible Structures, Inc.

  • Make sure your products sound right!

    Products that sound wrong can annoy your customers or could indicate a product defect.  Detecting such irregularities before shipping is important, because customers judge the product quality based on these sounds. NTi Audio provides solutions to check the sound quality of your products fast and reliably in an end-of-line test. The best solution uses the FX100 Audio Analyzer ...


    By NTi Audio AG

  • Officials: “Emergency Phase” of Puget Sound Energy Diesel Spill Near Crystal Mountain is Over…Long-Term Cleanup Continues

    (Seattle, Wash.) -- Officials from the U.S. Environmental Protection Agency (EPA), U.S. Forest Service (USFS), Washington Department of Ecology (Ecology) and Puget Sound Energy (PSE) today announced the end of the emergency phase of cleanup operations for the 18,000 gallon diesel spill discovered in early November at the PSE back-up electric generator located near the Crystal Mountain Ski Area. ...

  • ASTM E1414 / E1414M - 11a standard test method for airborne sound attenuation between rooms sharing a common ceiling plenum

    Modern offices and other multipurpose buildings commonly have suspended acoustical ceilings installed over room dividing partitions. The test facility prescribed in this test method is useful for providing ceiling attenuation data on the relevant ceiling/partition elements and ...


    By ASTM International

  • EPA’s proposed stormwater permit for JBLM incorporates low impact development to protect Puget Sound

    Due to its size, population and proximity to Puget Sound, Joint Base Lewis-McChord has received a proposed Municipal Stormwater discharge permit from the U.S. Environmental Protection Agency. The permit, when final, is expected to help guide how stormwater is managed across nearly 142 square miles of base property over the next decade and beyond. Located just south of Tacoma, JBLM is recognized ...

  • Announcement: 2nd International FINE!Dust-Free Congress

    2nd International FINE!Dust-Free Congress in Klagenfurt on Lake Wörthersee (A), 1 - 2.10.2009 Early registration discount only till 30.6.2009! The programme will focus on the new EU Air Quality Directive, costs, causes and the health impacts of fine-dust pollution. Douglas Dockery from the Harvard School of Public Health - one of the most renowned fine-dust experts and author of numerous ...


  • Fine dust (or particulate matter): Top speaker from Europe and the USA will take the floor.

    2nd International Congress in Klagenfurt on Lake Wörthersee (A), 1 to 2 October 2009 The programme will focus on the new EU Air Quality Directive, costs, causes and the health impacts of fine-dust pollution. Douglas Dockery from the Harvard School of Public Health - one of the most renowned fine-dust experts and author of numerous publications - will present the latest medical findings on ...


  • Microsoft breaks record for quietest place on earth

    Microsoft® has broken a Guinness World Record to become officially recognised as home to the quietest room on Earth. Staff at the company’s Redmond, Washington campus in the USA, beat the standing record of minus 13 dB(A), earlier this month, after the company’s anechoic chamber proved to have an ambient background noise level as low as minus 20 dB(A). Tests were carried out with ...

  • Announcement: 2nd International FINE!Dust-Free Congress

    2nd International FINE!Dust-Free Congress in Klagenfurt on Lake Wörthersee (A), 1 - 2.10.2009 Early registration discount only till 30.6.2009! The programme will focus on the new EU Air Quality Directive, costs, causes and the health impacts of fine-dust pollution. Douglas Dockery from the Harvard School of Public Health - one of the most renowned fine-dust experts and author of numerous ...


  • Urban greening reduces noise pollution

    Green roofs have the potential to significantly reduce road traffic noise in the urban environment, according to a new study. The results suggest that greening of roofs and walls with materials suitable for growing plants softens the urban environment keeping sound levels low, whereas hard, manmade structures tend to amplify traffic noise. The Environmental Noise Directive (2002/49/EC)1 ...

  • Brüel & Kjær sponsors aerospace laboratory at Virginia Tech

    The laboratory is part of Virginia Tech’s new National Institute of Aerospace (NIA) Research and Innovation Laboratories in Hampton, Virginia. It contains state-of-the-art instrumentation and equipment for measuring and analyzing vibration and sound, and is sponsored by Brüel & Kjær. NIA’s labs are directed by Christopher R. Fuller, who is Virginia Tech's Samuel Langley ...

  • Silencing wind turbines - active damping system developed to cut noise

    Wind power is one of the world's fastest growing energy technologies and proponents say the electricity generated by wind turbines is clean and environmentally friendly. But opponents are quick to point out a number of drawbacks including noise pollution. Due to the humming noises they emit, these turbines operate partially to keep residents happy. Partial use, however, cuts power output. A group ...

  • New Regufoam – Regupol vibration control products

    New Regufoam & Regupol types are available in Greek & Cypiot Market. ALPHA Acoustiki as the exclusive partner of BSW-Berleburg for Regufoam & Regupol Impact Sound Insulation & Vibration isolation is happy to announce that the new product types. Additionally as a consequence Vibration control product that uses Regufoam ...


    By ALPHA ACOUSTIKI Ltd.

  • Fuel Distributors Should Consider Their Safety Response Plans For 2014

    It’s thanks to the popularity of the car that entire professions for fuel distributors and lubricant distributors exist. However, the transportation and distribution of fuel and lubricants certainly features its own challenges. What sorts of challenges? Mostly to do with the health and safety of employees, as well as balancing a solid business model with the required federal regulations for ...

  • `Anti-noise` silences wind turbines

    If wind energy converters are located anywhere near a residential area, they must never become too noisy even in high winds. Most such power units try to go easy on their neighbors' ears, but even the most careful design cannot prevent noise from arising at times: One source is the motion of the rotor blades, another is the cogwheels that produce vibrations in the gearbox. These are relayed to ...

  • Keeping cool in Australia using the summer heat

    The leader of the Flagship’s solar cooling research project, Dr Stephen White, says significant greenhouse gas savings can be achieved in air conditioning by using energy from the sun. “Solar cooling utilises heat from solar thermal collectors to generate cooling for building air-conditioning,” he says. “Most conventional mechanical air conditioners use high-emission electricity derived from ...

  • MobilePro, the self-cleaning fume extractor for the professional welder

    Plymovent is proud to present the MobilePro; the mobile welding fume extractor for professional welders that need a flexible solution. This unit is designed to remove welding fumes on-site in confined spaces and spaces that are difficult to reach by fixed welding fume extraction systems, for example in the middle of a workshop or reversely, in an outer corner of a facility. This ...


    By Plymovent Group BV

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