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2. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   The wavelength in air of sinusoidal noise at approximately 800 Hz is double the distance of the average person's left ear to the right ear; [1] such a noise coming directly from the front will be easily reduced by an active system but coming from the side will tend to cancel at one ear while being reinforced at the other, making the noise ...

3. FAIST Anlagenbau GmbH - Wikipedia

   en.wikipedia.org/wiki/FAIST_Anlagenbau_GmbH

   FAIST Anlagenbau GmbH is one of the biggest manufacturer of noise control facilities and aero-acoustic wind tunnel treatment. The company which is located in Niederraunau (Bavaria, Germany) manufactures and installs noise control installations, noise control enclosures as well as acoustic test chambers and aero-acoustic wind tunnels worldwide.

4. Sound attenuator - Wikipedia

   en.wikipedia.org/wiki/Sound_attenuator

   A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces.

5. These Noise-Cancelling Headphones Are All on Sale for Black ...

   www.aol.com/weather/best-noise-cancelling...

   If you’re trying to find some peace and quiet when working from home, at the office, at school or during your morning commute, then a great pair of wireless noise-cancelling headphones can work ...

6. Noise control - Wikipedia

   en.wikipedia.org/wiki/Noise_control

   A large secondary market of homemade and home use acoustic panels, bass trap, and similar constructed products has developed resulting from this demand, with many small companies and individuals wrapping industrial and commercial-grade insulations in fabric for use in home recording studios, theatre rooms, and music practice spaces.

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

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

   Sennheiser PXC 550-II $289.99 at Amazon. Sennheiser PXC 550-II $299.99 at Walmart. True Wireless Sony WF-1000XM4. The WF-1000XM4 is the latest in Sony’s line of noise-canceling true wireless ...