sound attenuation News

  • ASTM E336 - 11 standard test method for measurement of airborne sound attenuation between rooms in buildings

    The main part of this standard uses procedures originally developed for laboratory measurements of the transmission loss of partitions. These procedures assume that the rooms in which the measurements are made have a sound field that reasonably approximates a diffuse field. Sound pressure levels in such rooms are reasonably uniform throughout the ...


    By ASTM International

  • 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

  • NGWA offers course on advanced techniques for evaluating and quantifying natural attenuation

    The National Ground Water Association is offering a two-day course, “Advanced Techniques for Evaluating and Quantifying Natural Attenuation,” on November 5-6 in Denver, Colorado.Monitored natural attenuation (MNA) has become widely accepted as a remediation alternative for solute plumes in groundwater. The use of MNA requires a sound understanding of natural attenuation mechanisms and their ...

  • ASTM E1179 - 11 Standard Specification for Sound Sources Used for Testing Open Office Components and Systems

    This specification states the requirements for sound sources used for measuring the speech privacy between open offices or for measuring the laboratory performance of acoustical components. The sound source shall be a loudspeaker enclosed in a box that has a maximum dimension of 0.30 m (1 ft) on a side, to reduce spurious sound reflections. The measurements shall be carried out in a free ...


    By ASTM International

  • ASTM E1110 - 06(2011) Standard Classification for Determination of Articulation Class

    Each weighting factor given in Table 1 represents the fraction of overall speech intelligence contained within the associated one-third octave frequency band. The weighting factors in Table 1 are obtained by multiplying each individual one-third octave band weighting factor of ANSI S3.5-1969 by 300. Articulation class (AC) values are ...


    By ASTM International

  • ASTM E1374 - 06(2011) Standard Guide for Open Office Acoustics and Applicable ASTM Standards

    This guide is intended for the use of architects, engineers, office managers, and others interested in designing, specifying, or operating open offices. It is not intended to be applied to other than office environments, for example, open plan schools. While this guide attempts to clarify the many interacting variables that influence ...


    By ASTM International

  • Cleaning Up Emissions with New CleanAIR Filter/Silencer

    Santa Fe, NM – Leading emissions control manufacturer, CleanAIR Systems introduces a new addition to their line of diesel particulate filter products, the PERMIT Filter/Silencer, designed to reduce exhaust emissions from prime power and emergency generators. Facilities using gensets for power generation are already familiar with silencers installed to lessen engine noise. With the enforcement of ...


  • Noise Impact Assessment Africa

    WKC is proud to announce that it has been awarded a contract to deliver a noise impact assessment for a new 200MW wind farm in East Africa. Wind power capacity in the region is expected to increase by around 12 gigawatts by 2040. The project will convert wind into useful energy utilising an array of highly efficient land based wind turbines. The first phase of the project entails a noise ...


    By WKC Group

  • NGWA offers course on low-cost remediation strategies

    The National Ground Water Association is offering the course, “Low-cost Remediation Strategies for Contaminated Soil and Groundwater,” February 2-4 in Denver, Colorado. Numerous low-cost technologies for remediating soil and groundwater contaminated with organic contaminants have been developed. This course provides practical, technologically sound guidelines on how to select the ...

  • Dynaflow`s latest USB based low-cost version of the ABS Acoustic Bubble Spectrometer

    Dynaflow, Inc. recently announced a USB based low-cost model of its Acoustic Bubble Spectrometer (ABS), a system used to measure and monitor the distribution of bubble sizes and void fractions in liquids. The low-cost USB version is equipped with a 1.25MHz data acquisition card, a signal generation card, received-signal amplifier, and the recently released ABS 6.0 software which allows the user ...


    By Dynaflow, Inc.

  • Griffin`s non-clog pumps built to aid in the rehabbing of America`s aging sewer infrastructure pumping sewage

    These pumps are capable of delivering flow over 17,000 gpm and head capacities of 240 ft. or more. Griffin non-clog pumps are an ideal solution for sewer bypasses, flood control, sumping, or any other application requiring high volume and the ability to move trash laden effluent(water with debris).Features:•Available in flows from a few gallons per minute to over 17,000 gallons per ...


    By Griffin Dewatering

  • Release of noise 3D online website

    SCI is announcing the release of the web enabled noise calculation solution noise 3D online, a first in noise web development. Noise 3D enables commercial and industrial users to assess noise levels with the latest available propagation programs, without having to purchase expensive software. Instead, the 3D modeling software Trimble Navigation SketchUp or Google Earth (Pro) are used as ...

  • BBA Pumps wins photo contest!

    As a company, BBA Pumps has devoted itself to building mobile pumping equipment for a variety of applications. Offering a wide range of pumps, for a wide range of applications, we build diesel driven pumps on a day-to-day basis. Over the years, we have designed, built and supplied a wide variety of pumps. Most of these have been completely standard, some of these however are completely custom ...


    By BBA Pumps

  • Wildlife Acoustics Announces its Song Meter™ SM2 Night Flight Call Package for Monitoring Migratory Birds

    Cost effective and weatherproof package sets a new standard for acoustically monitoring birds in flight PITTSBURGH - Ecological Society of America Annual Meeting -- Wildlife Acoustics, the leading supplier of acoustic monitoring systems for endangered and threatened wildlife species around the world, today announced the availability of the new Song Meter SM2 Night Flight Call ...


    By Wildlife Acoustics, Inc.

  • 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 ...

  • Noise Impact Assessment Africa

    WKC is proud to announce that it has been awarded a contract to deliver a noise impact assessment for a new 200MW wind farm in East Africa. Wind power capacity in the region is expected to increase by around 12 gigawatts by 2040. The project will convert wind into useful energy utilising an array of highly efficient land based wind turbines. The first phase of the ...


    By WKC Group

  • Zero Vibration Damper for Thomas OEM pumps

    Portable and stationary devices for medical, analytical and other applications require an extremely low sound and low vibration level of all functional parts. In the past individual adaptions have been created by customers in cooperation with the component manufacturers. Big efforts were necessary to generate a satisfying solution and many different taylored mounting brackets have been ...


    By Gardner Denver Thomas GmbH

  • 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 ...

  • AAF International to Close Hutchins, TX Plant

    American Air Filter Co., Inc. d/b/a AAF International, announced today it will be closing its 340,000 square foot Hutchins, TX plant. The closing is scheduled to be complete by the end of September 2012 and will result in the elimination of a majority of the jobs in the Hutchins plant. AAF customers purchasing from the Hutchins plant will be supplied from other AAF plants and distribution ...


    By AAF International

  • Thompson Pump to host second annual pump workshop

    Thompson Pump & Manufacturing Co., Inc., in partnership with Daytona State College, announces their second annual one-day pump workshop approved by the Florida Board of Professional Engineers, the Construction Industry Licensing Board and the Florida Rural Water Association. The one-day workshop scheduled to take place at Daytona State College in Daytona Beach, FL on Thursday, November 7, ...


    By Thompson Pump

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