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2. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Simplified graphical depiction of active noise reduction. To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control or ANC.A microphone captures the targeted ambient sounds, and a small amplifier generates sound waves that are exactly out of phase with the undesired sounds.

3. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   In 1957 Willard Meeker developed a working model of active noise control applied to a circumaural earmuff. This headset had an active attenuation bandwidth of approximately 50–500 Hz, with a maximum attenuation of approximately 20 dB. [3] By the late 1980s the first commercially available active noise reduction headsets became available.

4. Noise-canceling microphone - Wikipedia

   en.wikipedia.org/wiki/Noise-canceling_microphone

   The primary microphone is closer to the desired source (like a person's mouth). A second mic receives ambient noise. In a noisy environment, both microphones receive noise at a similar level, but the primary mic receives the desired sounds more strongly. Thus if one signal is subtracted from the other (in the simplest sense, by connecting the ...

5. The 7 best OTC hearing aids for seniors, according to ... - AOL

   www.aol.com/lifestyle/the-7-best-otc-hearing...

   Extra features: Many hearing aids offer additional features such as rechargeable batteries, directional microphones, wind noise reduction, extended battery life, and advanced noise cancellation ...

6. Best Noise-Cancelling Headphones: Here’s Where To Get Bose ...

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

   Bose Headphones 700, Noise Cancelling Bluetooth Over-Ear Wireless Headphones with Built-In Microphone for Clear Calls and Alexa Voice Control, Black. Price: $379 $299 . Buy On Amazon . Best For ...

7. Audiologists Say These Are the Best Over-The-Counter Hearing Aids

   www.aol.com/lifestyle/audiologists-best-over...

   Of note, Sarow says that users appreciate the app features which allow for directional microphone adjustments that help block out background noise, in addition to an instant fine-tuning tool that ...