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  2. Collar (animal) - Wikipedia

    en.wikipedia.org/wiki/Collar_(animal)

    Dogs can hear much higher pitches than humans. This collar sends an unpleasant pitch when the dog barks. This collar is tested for each dog to ensure that the pitch is perfectly tuned. [4] Vibration These collars often feature both sound and vibration. Instead of using sonic, they use a low pitched beep when barking begins.

  3. Dog whistle - Wikipedia

    en.wikipedia.org/wiki/Dog_whistle

    [3] [4] It is thought that the wild ancestors of cats and dogs evolved this higher hearing range in order to hear high-frequency sounds made by their preferred prey, small rodents. [3] The frequency of most dog whistles is within the range of 23 to 54 kHz, [ 5 ] so they are above the range of human hearing, although some are adjustable down ...

  4. Bark (sound) - Wikipedia

    en.wikipedia.org/wiki/Bark_(sound)

    There is no precise, consistent, and functional acoustic definition for barking, but researchers classify barks according to several criteria. [3] Researchers at the University of Massachusetts Amherst and Hampshire College have defined a bark as a short, abrupt vocalization that is relatively loud and high-pitched, changes in frequency, and often repeats rapidly in succession.

  5. Shepherd's whistle - Wikipedia

    en.wikipedia.org/wiki/Shepherd's_whistle

    This space acts as a sound box; the sound resonates in it. Blowing over the lip of a bottle or jug also makes resonances by blowing across an opening. Unlike typical, single-tone whistles, the shepherd's whistle can emit a range of pitches, by using the tongue and mouth to change the shape and size of the "sound box".

  6. List of onomatopoeias - Wikipedia

    en.wikipedia.org/wiki/List_of_onomatopoeias

    This is an accepted version of this page This is the latest accepted revision, reviewed on 14 January 2025. This is a list of onomatopoeias, i.e. words that imitate, resemble, or suggest the source of the sound that they describe. For more information, see the linked articles. Human vocal sounds Achoo, Atishoo, the sound of a sneeze Ahem, a sound made to clear the throat or to draw attention ...

  7. Hearing range - Wikipedia

    en.wikipedia.org/wiki/Hearing_range

    As dogs hear higher frequency sounds than humans, they have a different acoustic perception of the world. [24] Sounds that seem loud to humans often emit high-frequency tones that can scare away dogs. Whistles which emit ultrasonic sound, called dog whistles, are used in dog training, as a dog will respond much better to such levels. In the ...

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