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  2. Ray J - Wikipedia

    en.wikipedia.org/wiki/Ray_J

    Sanctuary. Atlantic. Elektra. EastWest. Musical artist. Website. rayj .com. William Ray Norwood Jr. (born January 17, 1981), [1] known professionally as Ray J, is an American R&B singer, songwriter, television personality, and actor. Born in McComb, Mississippi, and raised in Carson, California, he is the younger brother of singer and actress ...

  3. Stenomask - Wikipedia

    en.wikipedia.org/wiki/Stenomask

    A stenomask is a hand-held microphone built into a padded, soundproof enclosure that fits over the speaker's mouth or nose and mouth. Some lightweight versions may be fitted with an elastic neck strap to hold them in place while freeing the user's hands for other tasks. The purpose of a stenomask is to allow a person to speak without being ...

  4. Stereophonic sound - Wikipedia

    en.wikipedia.org/wiki/Stereophonic_sound

    The format was a widescreen process featuring three separate 35 mm motion picture films plus a separate sound film running in synchronization with one another at 26 fps, adding one picture panel each to the viewer's left and right at 45-degree angles, in addition to the usual front and center panel, creating a truly immersive panoramic visual ...

  5. Infrasound - Wikipedia

    en.wikipedia.org/wiki/Infrasound

    Close-cell polyurethane foam has been found to serve the purpose well. In the proposed test, test parameters will be sensitivity, background noise, signal fidelity (harmonic distortion), and temporal stability. The microphone design differs from that of a conventional audio system in that the peculiar features of infrasound are taken into account.

  6. Measurement microphone calibration - Wikipedia

    en.wikipedia.org/wiki/Measurement_microphone...

    A pistonphone is an acoustical calibrator (sound source) that uses a closed coupling volume to generate a precise sound pressure for the calibration of measurement microphones. The principle relies on a piston mechanically driven to move at a specified cyclic rate, pushing on a fixed volume of air to which the microphone under test is coupled.

  7. Audio analyzer - Wikipedia

    en.wikipedia.org/wiki/Audio_Analyzer

    An audio analyzer is a test and measurement instrument used to objectively quantify the audio performance of electronic and electro-acoustical devices. Audio quality metrics cover a wide variety of parameters, including level, gain, noise, harmonic and intermodulation distortion, frequency response, relative phase of signals, interchannel ...

  8. Hydrophone - Wikipedia

    en.wikipedia.org/wiki/Hydrophone

    Hydrophone. A hydrophone ( Ancient Greek: ὕδωρ + φωνή, lit. 'water + sound') is a microphone designed to be used underwater for recording or listening to underwater sound. Most hydrophones are based on a piezoelectric transducer that generates an electric potential when subjected to a pressure change, such as a sound wave.

  9. 3D sound localization - Wikipedia

    en.wikipedia.org/wiki/3D_sound_localization

    3D sound localization. 3D sound localization refers to an acoustic technology that is used to locate the source of a sound in a three-dimensional space. The source location is usually determined by the direction of the incoming sound waves (horizontal and vertical angles) and the distance between the source and sensors.

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