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  2. Acoustic quieting - Wikipedia

    en.wikipedia.org/wiki/Acoustic_quieting

    Sound isolation: Noise isolation is isolating noise to prevent it from transferring out of one area, using barriers like deadening materials to trap sound and vibrational energy. Example: In home and office construction, many builders place sound-control barriers (such as fiberglass batting ) in walls to deaden the transmission of noise through ...

  3. Soundproofing - Wikipedia

    en.wikipedia.org/wiki/Soundproofing

    A pair of headphones being tested inside an anechoic chamber for soundproofing. Soundproofing is any means of impeding sound propagation.There are several methods employed including increasing the distance between the source and receiver, decoupling, using noise barriers to reflect or absorb the energy of the sound waves, using damping structures such as sound baffles for absorption, or using ...

  4. Noise control - Wikipedia

    en.wikipedia.org/wiki/Noise_control

    Pathway alterations include physical materials, such as foam, absorb sound and walls to provide a sound barrier that modifies existing systems that decrease hazardous noise. Sound dampening enclosures for loud equipment and isolation chambers from which workers can remotely control equipment can also be designed.

  5. 11 photos of America's fighter jets breaking the sound barrier

    www.aol.com/article/2016/03/07/11-photos-fighter...

    At a speed of about 767 miles per hour, depending on temperature and humidity, a moving object will break the sound barrier. It was not until World War II, when aircraft started to reach the ...

  6. Sound barrier - Wikipedia

    en.wikipedia.org/wiki/Sound_barrier

    The sound barrier or sonic barrier is the large increase in aerodynamic drag and other undesirable effects experienced by an aircraft or other object when it approaches the speed of sound. When aircraft first approached the speed of sound, these effects were seen as constituting a barrier, making faster speeds very difficult or impossible.

  7. Environmental impact of pharmaceuticals and personal care ...

    en.wikipedia.org/wiki/Environmental_impact_of...

    Water treatment facilities use different processes in order to minimize or eliminate these pollutants. This is done by using sorption where suspended solids are removed by sedimentation . [ 17 ] Another method used is biodegradation , and through this method microorganisms, such as bacteria and fungi , feed on or break down these pollutants ...

  8. Noise barrier - Wikipedia

    en.wikipedia.org/wiki/Noise_barrier

    Noise barriers have been built in the United States since the mid-twentieth century, when vehicular traffic burgeoned. I-680 in Milpitas, California was the first noise barrier. [1] In the late 1960s, analytic acoustical technology emerged to mathematically evaluate the efficacy of a noise barrier design adjacent to a specific roadway. By the ...

  9. Brightwater Treatment Plant - Wikipedia

    en.wikipedia.org/wiki/Brightwater_Treatment_Plant

    A 13-mile (21 km), 17.5-foot-diameter (5.3 m) [3] tunnel was built by several tunnel boring machines from the treatment plant to a marine outfall nearly due west on Puget Sound. [4] The outfall is 600 feet (180 m) below the surface. [5] Construction delays were incurred due to unexpected soil conditions causing damage to the boring machines. [3]