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  2. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    To cancel the lower-frequency portions of the noise, noise-cancelling headphones use active noise control. A microphone captures the targeted ambient sounds, and a small amplifier generates sound waves that are exactly out of phase with the undesired sounds. When the sound pressure of the noise wave is

  3. Active noise control - Wikipedia

    en.wikipedia.org/wiki/Active_noise_control

    The patent described how to cancel sinusoidal tones in ducts by phase-advancing the wave and canceling arbitrary sounds in the region around a loudspeaker by inverting the polarity. [3] In the 1950s Lawrence J. Fogel patented systems to cancel the noise in helicopter and airplane cockpits. In 1957 Willard Meeker developed a working model of ...

  4. Noise cancelling - Wikipedia

    en.wikipedia.org/?title=Noise_cancelling&redirect=no

    This page was last edited on 17 December 2006, at 08:07 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  5. Noise cancelling technology - Wikipedia

    en.wikipedia.org/?title=Noise_cancelling...

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  6. Noise-canceling microphone - Wikipedia

    en.wikipedia.org/wiki/Noise-canceling_microphone

    The internal electronic circuitry of an active noise-canceling mic attempts to subtract noise signal from the primary microphone. The circuit may employ passive or active noise canceling techniques to filter out the noise, producing an output signal that has a lower noise floor and a higher signal-to-noise ratio .

  7. List of Bose headphones - Wikipedia

    en.wikipedia.org/wiki/List_of_Bose_headphones

    In 2019, Bose released the Noise Cancelling Headphones 700, also known as the NCH 700, a new high-end product positioned above the QC 35. [13] [14] The headphones have a stainless steel band and are controlled using a mix of buttons and touch-sensitive areas on the cups.

  8. Category:Noise reduction - Wikipedia

    en.wikipedia.org/wiki/Category:Noise_reduction

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  9. Category:Noise control - Wikipedia

    en.wikipedia.org/wiki/Category:Noise_control

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