PSY280H1 Lecture Notes - Lecture 8: Stapes, Otosclerosis, Ototoxicity

• School: UTSG
• Department: Psychology
• Course: PSY280H1
• Professor: Dirk Bernhardt- Walther

Document Summary

This class: chapters 9, 10: no class next week. Sound properties: auditory system anatomy and function, intensity, loudness, hearing loss, sound localization. Vi(cid:271)ratio(cid:374)s of a(cid:374) o(cid:271)je(cid:272)t (cid:272)ause (cid:373)ole(cid:272)ules i(cid:374) the o(cid:271)je(cid:272)t"s surrou(cid:374)di(cid:374)g (cid:373)ediu(cid:373) to (cid:448)i(cid:271)rate as (cid:449)ell, (cid:449)hi(cid:272)h causes pressure changes in the medium. Sound is thus the propagation of pressure changes in the air. This wave propagates through --> no air actually moves though. Example: speed of sound through air is about 340 meters/second, but speed of sound through water is 1500 meters/second. 5 times faster in water because of the higher density of water. Light travels a million times faster than sound. Frequency: for sound, the number of times per second that a pattern of pressure repeats. Hertz (hz): a unit of measure for frequency. Amplitude: the magnitude of displacement of a sound pressure wave. Intensity: the amount of sound energy falling on a unit area.