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2. 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 ...

3. 5 Items From the 1970s That Are Worth a Lot of Money - AOL

   www.aol.com/5-items-1970s-worth-lot-170007423.html

   Home & Garden. Lighter Side. Medicare. News. Science & Tech. Shopping. Sports. Weather. 5 Items From the 1970s That Are Worth a Lot of Money. Caitlyn Moorhead. December 20, 2024 at 3:00 PM.

4. Cushion - Wikipedia

   en.wikipedia.org/wiki/Cushion

   A cushion is a soft bag of some ornamental material, usually stuffed with wool, hair, feathers, polyester staple fiber, non-woven material, cotton, or even paper torn into fragments. It may be used for sitting or kneeling upon, or to soften the hardness or angularity of a chair or couch. [ 1 ]

5. Acoustic foam - Wikipedia

   en.wikipedia.org/wiki/Acoustic_foam

   A close-up image of acoustic foam. Acoustic foam is an open celled foam used for acoustic treatment. It attenuates airborne sound waves, reducing their amplitude, for the purposes of noise reduction or noise control. [1] The energy is dissipated as heat. [2] Acoustic foam can be made in several different colors, sizes and thickness. [3]

6. What 'secret' loudspeaker codes mean at department stores - AOL

   www.aol.com/news/2010-10-13-what-secret...

   If you've been shopping in a big box retail store you've probably heard an announcement on the loudspeaker such as, "code yellow toys, code yellow toys." This "code" is one of many innocuous ...

7. Acoustic quieting - Wikipedia

   en.wikipedia.org/wiki/Acoustic_quieting

   Sound reflections: by limiting the reflection using many methods, e.g. by using acoustic absorption (deadening) materials, trapping the sound, opening a "window" to let sound out, etc. By analyzing the entire sequence of events, from the source to the observer, an acoustic engineer can provide many ways to quieten the machine.