Dog whistle - wikipedia Dog whistle For the use of political code words, see Dog - whistle politics. 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 people can not hear but some other animals can, including dogs and domestic cats, and is used in their training. It was invented in 1876 by Francis Galton and is mentioned in his book Inquiries into Human Faculty and its Development, in which he describes experiments to test the range of frequencies that could be heard by various animals, such as a house cat. The maximum upper range of human hearing is about 20 kHz for children, declining to 15 -- 17 kHz for middle - age adults. The top end of a dog 's hearing range is about 45 kHz, while a cat 's is 64 kHz. 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. The frequency of most dog whistles is within the range of 23 to 54 kHz, so they are above the range of human hearing, although some are adjustable down into the audible range. To human ears, a dog whistle makes only a quiet hissing sound. The advantage of the dog whistle is that it does n't produce a loud irritating noise for humans that a normal whistle would produce, so it can be used to train or command animals without disturbing nearby people. Some dog whistles have adjustable sliders for active control of the frequency produced. Trainers may use the whistle simply to gather a dog 's attention, or to inflict pain for the purpose of behaviour modification. In addition to lung - powered whistles, there are also electronic dog whistle devices that emit ultrasonic sound via piezoelectric emitters. The electronic variety are sometimes coupled with bark - detection circuits in an effort to curb barking behaviour. This kind of whistle can also be used to determine the hearing range for people and for physics demonstrations requiring ultrasonic sounds. See also Ultrasound References Wikimedia Commons has media related to Dog whistles. Jump up ^ Galton, Francis ( 1883 ). Inquiries into Human Faculty and its Development, p. 26 - 27 Jump up ^ `` Frequency Range of Human Hearing ''. The Physics Factbook. ^ Jump up to : Krantz, Les ( 2009 ). Power of the Dog : Things Your Dog Can Do That You Ca n't. MacMillan. pp. 35 -- 37. ISBN 0312567227. Jump up ^ Strain, George M. ( 2010 ). `` How Well Do Dogs and Other Animals Hear ? ''. Prof. Strain 's website. School of Veterinary Medicine, Louisiana State University. Retrieved July 21, 2012. Jump up ^ Caroline Coile, D. ; Bonham, Margaret H. ( 2008 ), `` Why Do Dogs Like Balls ? : More Than 200 Canine Quirks, Curiosities, and Conundrums Revealed '', Sterling Publishing Company, Inc : 116, ISBN 9781402750397, retrieved 2011 - 08 - 07 Jump up ^ Weisbord, Merrily ; Kachanoff, Kim ( 2000 ). Dogs with Jobs : Working Dogs Around the World. Simon & Shuster. pp. xvi -- xvii. ISBN 0671047353. Whistles and whistling Apito Boatswain 's call Dog Eagle - bone Hand flute Language Monopipe Pyzhatka Shepherd 's Steam Train Wolf Alfred De Courcy Fox 40 J Hudson & Co James Dixon & Sons W Dowler & Sons Henry Arthur Ward Retrieved from `` https://en.wikipedia.org/w/index.php?title=Dog_whistle&oldid=781079597 '' Categories : Dog equipment Whistles Dog training and behavior Hidden categories : All articles with unsourced statements Articles with unsourced statements from July 2013 Talk About Wikipedia Čeština Deutsch Français Frysk Nederlands 日本 語 Norsk nynorsk Edit links This page was last edited on 18 May 2017, at 22 : 48. Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia ® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. About Wikipedia

Question: what does a silent dog whistle sound like
Answer: a quiet hissing sound