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2. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   Active noise control ( ANC ), also known as noise cancellation ( NC ), or active noise reduction ( ANR ), is a method for reducing unwanted sound by the addition of a second sound specifically designed to cancel the first. The concept was first developed in the late 1930s; later developmental work that began in the 1950s eventually resulted in ...

3. Noise-canceling microphone - Wikipedia

   en.wikipedia.org/wiki/Noise-canceling_microphone

   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 microphones out of phase) much of the noise is canceled while the desired sound is retained.

4. List of discontinued Bose headphones - Wikipedia

   en.wikipedia.org/wiki/List_of_discontinued_Bose...

   The "QuietComfort 15" (QC15) over-ear headphones were sold from 2009 until 2015. [32] Compared with its predecessor, the QuietComfort 2, the QC15 had microphones on the inside and outside of each unit and revised foam padding. Like the QuietComfort 2, the QC15 was powered by a single AAA-sized battery. [33]

5. Signal-to-noise ratio (imaging) - Wikipedia

   en.wikipedia.org/wiki/Signal-to-noise_ratio...

   Signal-to-noise ratio ( SNR) is used in imaging to characterize image quality. The sensitivity of a (digital or film) imaging system is typically described in the terms of the signal level that yields a threshold level of SNR. Industry standards define sensitivity in terms of the ISO film speed equivalent, using SNR thresholds (at average scene ...

6. Why the Inflation Reduction Act is called what it is [Video]

   www.aol.com/finance/why-inflation-reduction-act...

   Oil prices have dropped by more than $30 per barrel since peaking in June. Gasoline prices have followed those down, declining by more than a dollar, to a national average of $3.95. The main ...

7. Noise-cancelling headphones - Wikipedia

   en.wikipedia.org/wiki/Noise-cancelling_headphones

   Noise -cancelling headphones alongside a carry case. Noise-cancelling headphones are headphones which suppress unwanted ambient sounds using active noise control. This is distinct from passive headphones which, if they reduce ambient sounds at all, use techniques such as soundproofing . Noise cancellation makes it possible to listen to audio ...

8. How noise cancelling headphones work - AOL

   www.aol.com/news/noise-cancelling-headphones...

   Noise cancellation technology is becoming more common in headphones, but it still tends to add a bit of a price premium. Below, we run you through what you need to know about noise cancellation ...

9. A new anti-DEI catchphrase shows how confused people are ...

   www.aol.com/finance/anti-dei-catchphrase-shows...

   Good morning! There’s a new phrase permeating the anti-DEI spaces online. “MEI,” an acronym for “merit, excellence, and intelligence” was coined earlier this month by Alexandr Wang ...