ANSC 4100 Lecture Notes - Lecture 9: Infrasound, Noise, Startle Response

• School: University of Guelph
• Department: Animal Science
• Course: ANSC 4100
• Professor: Vern Osborne

Document Summary

Tune into your livestock fi(cid:374)di(cid:374)g you(cid:396) a(cid:374)i(cid:373)al"s f(cid:396)e(cid:395)ue(cid:374)(cid:272)y. Convert physical vibration into an encoded nervous impulse which is then processed by the central auditory pathways of the brain. Sound waves short wavelength = high frequency high pitched sounds long wavelength = low frequency low pitched sounds. Animal vs. human hearing audio = frequencies capable of being heard by humans ultrasonic = frequencies higher than audio infrasonic = frequencies below audio. Bats use ultrasound for echo location while in flight. Dogs a(cid:396)e a(cid:271)le to hea(cid:396) ult(cid:396)asou(cid:374)d, (cid:449)hi(cid:272)h is the p(cid:396)i(cid:374)(cid:272)iple of (cid:862)sile(cid:374)t(cid:863) dog (cid:449)histles. Snakes sense infrasound through their bellies, and whales, giraffes and elephants use it for communication noise- an unwanted sound, either chronic or intermittent, from a variety of sources in the environment. What elicits a fear response? suddenness: novelty, unexpected nature of the sound. Fear response factors depend on breed and temperament. Does(cid:374)"t apply to elepha(cid:374)ts who are excellent, accurate localizers: type of habitat.