PSYO 1021 Lecture Notes - Lecture 12: Group C Nerve Fiber, Ossicles, Olfactory Nerve
24 Dec 2015
School
Department
Course
Professor
Document Summary
Frequency: # of cycles (hz) per second, determines pitch, amount of compression and expansion of molecules. Aka change in pressure: related to loudness" we perceive. Frequency range of animals: humans can hear a range of 20 20, 000 hz. Declines with aging (usually to 12, 000 hz: dogs 40 60, 000 hz. Why do instruments (and people) sound different from each: even at the same pitch and loudness, a trumpet and a guitar sound different . The quality of sound is frequently known as timbre or sometimes colour or tone quality : this is the overall pattern caused by multiple simultaneous sound waves. In actuality most sounds produce multiple sound waves at a time: the fundamental (or dominant one, and supporting harmonics, combined together it gives a sound its distinct timbre. A cross section of the ear shows the structures that transmit sound waves from the auditory canal to the cochlea.
