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  2. 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 ...

  3. Noise-cancelling headphones - Wikipedia

    en.wikipedia.org/wiki/Noise-cancelling_headphones

    Several airlines provide noise-cancelling headphones in their business and first-class cabins. Bose started supplying American Airlines with noise-cancelling headphones in 1999 and started offering the "Quiet Comfort" line for the general consumer in 2000. Noise cancelling is particularly effective against aircraft engine noise. [citation ...

  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...

    Pages for logged out editors learn more. Contributions; Talk; Noise cancelling technology

  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. Noise control - Wikipedia

    en.wikipedia.org/wiki/Noise_control

    An effective model for noise control is the source, path, and receiver model by Bolt and Ingard. [9] Hazardous noise can be controlled by reducing the noise output at its source, minimizing the noise as it travels along a path to the listener, and providing equipment to the listener or receiver to attenuate the noise.

  8. Uchu Sentai Kyuranger - Wikipedia

    en.wikipedia.org/wiki/Uchu_Sentai_Kyuranger

    Kyuranger is considered the fifth space-themed series [a] whose primary motifs are constellations and Greco-Roman mythology, and it is also the first Super Sentai series to introduce nine regular members in the beginning instead of five or fewer like previous installments. The team later gains three additional members, increasing the number to ...

  9. Category:Noise reduction - Wikipedia

    en.wikipedia.org/wiki/Category:Noise_reduction

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