PSYCH 3A03 Lecture Notes - Otoacoustic Emission, Spatial Gradient, Afferent Nerve Fiber

• School: McMaster University
• Department: Psychology
• Course: PSYCH 3A03
• Professor: Paul Faure

Document Summary

Reflect sounds made my the speaker and the ear. Otoacoustic emissions are sounds that are generated by the auditory system. Sounds reflected off of the tympani are recorded in addition to other sounds. Reflected sound measured by the expected time delay giving us the approximate delay. Recorded sound is similar to outgoing sound but the time delay is to long. Sounds are significantly more damped in the reflected wave. Sounds emitted by the ear are spontaneous and are very weak sounds. Playing amplitude modulated stimulus: different frequencies, which peak at the same amplitude. Recorded waves are similar to stimulus and another peak which occurs at 2f1 f2 and has a lower amplitude. Expected from a non linear summation of f1 and f2 evidence that the ear produces a sounds due to the distortion product (nonlinear summation of the stimulus) Mechano- to neurotransduction mechanism probably similar as what is observerd in ihc.