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  2. Low Frequency Analyzer and Recorder - Wikipedia

    en.wikipedia.org/wiki/Low_Frequency_Analyzer_and...

    A working model of the Low Frequency Analyzer and Recorder was delivered in May 1951 which operated with real time analysis of a frequency band of 1 to 1/2 Hz. Along with the working model was a proposal for hydrophones, cables, processing systems and beamforming so that a hydrophone array could present multiple azimuthal beams to be displayed.

  3. Occupational noise - Wikipedia

    en.wikipedia.org/wiki/Occupational_noise

    Occupational noise, or industrial noise, is often a term used in occupational safety and health, as sustained exposure can cause permanent hearing damage. Occupational noise is considered an occupational hazard traditionally linked to loud industries such as ship-building , mining , railroad work, welding , and construction , but can be present ...

  4. Dolby noise-reduction system - Wikipedia

    en.wikipedia.org/wiki/Dolby_noise-reduction_system

    A Dolby noise-reduction system, or Dolby NR, is one of a series of noise reduction systems developed by Dolby Laboratories for use in analog audio tape recording. [1] The first was Dolby A, a professional broadband noise reduction system for recording studios that was first demonstrated in 1965, but the best-known is Dolby B (introduced in 1968), a sliding band system for the consumer market ...

  5. Cockpit voice recorders only record 2 hours at a time. The ...

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  6. dbx (noise reduction) - Wikipedia

    en.wikipedia.org/wiki/Dbx_(noise_reduction)

    The dbx K9 noise reduction card was designed to fit into the pro dolby-A series A-361 frames, already in wide use in pro reel-to-reel recording studios of the time. The full designation of the card is K9-22, which is a dog vs. cat joke.

  7. Zoom Corporation - Wikipedia

    en.wikipedia.org/wiki/Zoom_Corporation

    Zoom Corporation was founded in Tokyo in 1983 and in 2004, established ZOOM HK LTD as a logistics base in Hong Kong. In 2009, it set up ZOOM Dongguan Corporation (China) as a quality control operation; [3] 2013, formed ZOOM North America, LLC (US) as a distribution base; 2017, listed on Tokyo Stock Exchange JASDAQ (Standard); [4] [5] In 2018, acquired shares of Mogar Music S.p.A. (Italy ...