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  2. The Best Emotional Support Dogs for People with Anxiety ... - AOL

    www.aol.com/lifestyle/best-emotional-support...

    Mike Ko/EyeEm/Getty Images. Height: 21-24 inches Weight: 55-75 pounds Personality: Friendly, Devoted Activity Level: Moderate to High Shedding Factor: High Life Expectancy: 10-12 years ...

  3. Dog whistle - Wikipedia

    en.wikipedia.org/wiki/Dog_whistle

    Dog whistles (left) adjustable, (right) fixed frequency Galton whistle, the first "dog whistle" A dog whistle (also known as silent whistle or Galton's whistle ) is a type of whistle that emits sound in the ultrasonic range, which humans cannot hear but some other animals can, including dogs and domestic cats , and is used in their training .

  4. Shepherd's whistle - Wikipedia

    en.wikipedia.org/wiki/Shepherd's_whistle

    Two 3-D-printed shepherd's whistles, with and without handles. Shepherd's whistles can be more traditionally made from a piece of folded metal. [1] A shepherd's whistle is a specialized, modulatable, variable-pitch whistle used to train and transmit commands to working dogs and other animals. Unlike other whistles, they are placed inside the mouth.

  5. 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 ...

  6. Psychiatric assistance dog - Wikipedia

    en.wikipedia.org/wiki/Psychiatric_assistance_dog

    A psychiatric assistance dog or psychiatric service dog is a sub-category of assistance dog trained to assist their handler with a psychiatric disability or a mental disability, such as obsessive-compulsive disorder, post-traumatic stress disorder, schizophrenia, depression, anxiety, and bipolar disorder. [1] [2]

  7. Talk:Dog whistle - Wikipedia

    en.wikipedia.org/wiki/Talk:Dog_whistle

    I've read that a dog's hearing range extends up to 45 kHz, so I would guess an ultrasonic dog whistle would have a frequency of somewhere between 20kHz and 45kHz. Interesting question. The dog article quotes these numbers for hearing (which numbers vary depending on my source; I'm going to re-edit that section of the article)): dogs hear in the ...