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A deer horn, or deer whistle, is a whistle mounted on automobiles intended to help prevent collisions with deer. Air moving through the device produces sound (ultrasound in some models), intended to warn deer of a vehicle's approach. Deer are highly unpredictable, skittish animals whose normal reaction to an unfamiliar sound is to stop, look ...
Hearing range describes the frequency range that can be heard by humans or other animals, though it can also refer to the range of levels. The human range is commonly given as 20 to 20,000 Hz, although there is considerable variation between individuals, especially at high frequencies, and a gradual loss of sensitivity to higher frequencies ...
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.
However, humans have some limitations in an area called the "cone of confusion," meaning it is difficult to tell if a sound is coming from the right or left when it is just in front or behind us.
Elephants possess a pharyngeal pouch associated with their larynx and hyoid apparatus, and their roars can also be modified by the nostrils in their trunks. [5] Male elephant seals and saiga antelopes have an enlarged and inflated proboscis, which also affects resonance. Saiga nevertheless roar with their mouths closed and produce a "nasal roar ...
Signature whistles, which are in a higher frequency range than humans can hear, have an important role in facilitating mother–calf contact. [86] In the Sarasota Dolphin Research Program's library of recordings were 19 female common bottlenose dolphins producing signature whistles both with and without the presence of their calf. [86]
For people who haven’t experienced this firsthand, a fresh layer of snow on the ground can sound similar to when you’re wearing a thick pair of headphones with nothing playing.
Alarm calls have been studied in many species, such as Belding's ground squirrels. Characteristic 'ticking' alarm call of a European robin, Erithacus rubecula. In animal communication, an alarm signal is an antipredator adaptation in the form of signals emitted by social animals in response to danger.