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  2. The Mosquito - Wikipedia

    en.wikipedia.org/wiki/The_Mosquito

    The Mosquito or Mosquito alarm is a machine used to deter loitering by emitting sound at high frequency. In some versions, it is intentionally tuned to be heard primarily by younger people. Nicknamed "Mosquito" for the buzzing sound it plays, the device is marketed as a safety and security tool for preventing youths from congregating in ...

  3. Hypersonic effect - Wikipedia

    en.wikipedia.org/wiki/Hypersonic_effect

    Numerous other studies have contradicted the portion of the results relating to the subjective reaction to high-frequency audio, finding that people who have "good ears" [8] listening to Super Audio CDs and high resolution DVD-Audio recordings [9] on high fidelity systems capable of reproducing sounds up to 30 kHz [10] cannot tell the ...

  4. Electromagnetically induced acoustic noise - Wikipedia

    en.wikipedia.org/wiki/Electromagnetically...

    The hissing of high voltage transmission lines is due to corona discharge, not magnetism. The phenomenon is also called audible magnetic noise, [ 1 ] electromagnetic acoustic noise, lamination vibration [ 2 ] or electromagnetically induced acoustic noise, [ 3 ] or more rarely, electrical noise, [ 4 ] or "coil noise", depending on the application.

  5. Ringtone - Wikipedia

    en.wikipedia.org/wiki/Ringtone

    A ringtone maker is an application that converts a user chosen song or other audio file for use as a ringtone of a mobile phone. The ringtone file is installed in the mobile phone either by direct cable connection, Bluetooth, text messaging, or e-mail. On many websites, users may create ringtones from digital music or audio.

  6. Ringing tone - Wikipedia

    en.wikipedia.org/wiki/Ringing_tone

    Also known as caller tunes in some countries, such as India, [6] [better source needed] ringback music is a service offered by mobile network operators that allows subscribers to select a melody, music, tone, song or even personalized recorded sounds as a Ring-Back tone for all of their callers.

  7. Vehicle audio - Wikipedia

    en.wikipedia.org/wiki/Vehicle_audio

    Mobile players for physical media have been provided for vinyl records, 8-track tapes, cassette tapes, compact discs, and MP3s.The increased sophistication of the vehicle audio system to accommodate such media has made the audio unit a common target of car break-ins, so these are equipped with anti-theft systems too.

  8. Active sound design - Wikipedia

    en.wikipedia.org/wiki/Active_sound_design

    Active noise cancelling (ANC) is a software process that uses existing in-vehicle infotainment hardware to eliminate undesirable noise within the interior of a vehicle. This elimination technique is known as harmonic order reduction, where unwanted audio signals are identified by sensors and filtered out of the overall interior vehicle sound. [3]

  9. MUSIC (algorithm) - Wikipedia

    en.wikipedia.org/wiki/MUSIC_(algorithm)

    A modified version of MUSIC, denoted as Time-Reversal MUSIC (TR-MUSIC) has been recently applied to computational time-reversal imaging. [11] [12] MUSIC algorithm has also been implemented for fast detection of the DTMF frequencies (Dual-tone multi-frequency signaling) in the form of C library - libmusic [13] (including for MATLAB ...