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  2. Modulated ultrasound - Wikipedia

    en.wikipedia.org/wiki/Modulated_ultrasound

    For this reason, most underwater "telephones" either operate in "baseband" mode (at the same frequency as the voice and is basically a loudspeaker), in a "UQC-1" mode (as defined in MIL-C-15240D) with a modulated carrier of 7,500 Hz, or in "UQC-2" mode (as defined in MIL-C-22509) from around 8,500 hertz to approximately 12,000 hertz, or in the ...

  3. Audio frequency - Wikipedia

    en.wikipedia.org/wiki/Audio_frequency

    An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is audible to the average human. The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch. [1] The generally accepted standard hearing range for humans is 20 to 20,000 Hz.

  4. Daniel Hertz S.A. - Wikipedia

    en.wikipedia.org/wiki/Daniel_Hertz_S.A.

    Daniel Hertz S.A. is a high-performance audio company based in Switzerland. The company makes high-efficiency loudspeakers, power amplifiers, pre-amplifiers, integrated amplifiers, and audio processing software. Daniel Hertz provides consulting services to major companies like LG Electronics of Korea and semiconductor firm Intersil of the USA.

  5. SpeakerCraft - Wikipedia

    en.wikipedia.org/wiki/SpeakerCraft

    SpeakerCraft is an American [1] manufacturer of custom-installed audio/video and home theater products based in Petaluma, California.Founded in 1976 by Edward Haase, Ken Humphreys, and Eugene Humphreys, the company evolved from a retail stereo store and original equipment manufacturer to a designer and installer of custom audio systems.

  6. Infinity Systems - Wikipedia

    en.wikipedia.org/wiki/Infinity_Systems

    Infinity Systems is an American manufacturer of loudspeakers founded in Los Angeles in 1968 and headquartered in Stamford, Connecticut. [1] Since 1983, Infinity has been part of Harman International Industries , which became a subsidiary of Samsung Electronics in 2017.

  7. Audio power - Wikipedia

    en.wikipedia.org/wiki/Audio_power

    Audio power is the electrical power transferred from an audio amplifier to a loudspeaker, measured in watts.The electrical power delivered to the loudspeaker, together with its efficiency, determines the sound power generated (with the rest of the electrical power being converted to heat).

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