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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. Noise, vibration, and harshness - Wikipedia

    en.wikipedia.org/wiki/Noise,_vibration,_and...

    In contrast, when the phenomenon being considered occurs at relatively high frequency – for example, above 1 kHz – a statistical energy analysis (SEA) model may be a better approach. For the mid-frequency band, various methodologies exist, such as vibro-acoustic finite element analysis, and boundary element analysis. The structure can be ...

  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. Audio equipment testing - Wikipedia

    en.wikipedia.org/wiki/Audio_equipment_testing

    Objectivists claim that digital sound can have higher fidelity than analog sound because it lacks clicks, pops, wow, flutter, audio feedback, degradation, generational loss, and rumble, has a higher signal-to-noise ratio, has a wider dynamic range, has less total harmonic distortion, and has a flatter and more extended frequency response.

  7. Electric vehicles don’t need to sound like the future ... - AOL

    www.aol.com/finance/future-driving-sounds...

    Other brands like the Nissan Leaf and Chevrolet Bolt, have opted for high-pitched, UFO-like sound options. And I understand why: Driving a car that sounds futuristic or unique can feel cool.

  8. 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.

  9. ITU-R 468 noise weighting - Wikipedia

    en.wikipedia.org/wiki/ITU-R_468_noise_weighting

    Developments in the 1960s, in particular the spread of FM broadcasting and the development of the compact audio cassette with Dolby-B Noise Reduction, alerted engineers to the need for a weighting curve that gave subjectively meaningful results on the typical random noise that limited the performance of broadcast circuits, equipment and radio circuits.