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2. Sound transmission class - Wikipedia

   en.wikipedia.org/wiki/Sound_transmission_class

   The Outdoor–Indoor Transmission Class (OITC) is a standard used for indicating the rate of sound transmission from outdoor noise sources into a building. It is based on the ASTM E-1332 Standard Classification for Rating Outdoor-Indoor Sound Attenuation. [ 37 ]

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. Acoustic panel - Wikipedia

   en.wikipedia.org/wiki/Acoustic_panel

   Acoustic panel installation in a conference room, to reduce office ceiling echo Soundproofing in a studio isolation booth. Acoustic panels (also sound absorption panels, soundproof panels or sound panels) are sound-absorbing fabric-wrapped boards designed to control echo and reverberation in a room. [1]

5. Soundproofing Against Outdoor Noise - AOL

   www.aol.com/news/2010-08-02-how-to-beat-outdoor...

   Scott Warrick of Bloomington, Ind. has a noise problem outside his house: jackhammers. "I'm enduring three months of daily jackhammering as they tear down a local school." Excessive noise entering ...

6. Buy Quiet - Wikipedia

   en.wikipedia.org/wiki/Buy_Quiet

   Buy Quiet programs seek to minimize the impact of noise on communities and help companies comply with OSHA and other noise regulation requirements as well. Additionally, Buy Quiet concepts may reduce the long-term costs of audiometric testing, personal protective equipment, and workers’ compensation.

7. Best noise-canceling headphones, according to Consumer Reports

   www.aol.com/news/best-noise-canceling-headphones...

   The Sennheiser PXC 550-II is one of the highest-scoring headphones in our ratings, with superb sound quality and noise canceling. The PXC 550-II is as much as $300 cheaper than many competitors.