PSYC 2220 Lecture Notes - Lecture 3: Inner Ear, Hair Cell, Tonotopy

• School: York University
• Department: Psychology
• Course: PSYC 2220
• Professor: Alistair Mapp

Document Summary

Example: airborne sound; it decreases and increases in air pressure. Imagine the speakers are off and we put an instrument to measure it. As the speaker is turned on, the air pressure in the diaphone increases until it reaches the max and then, it decreases until it reaches its lowest. Looking at the video physical and psychological property of sound, we"ll hear different kind of sounds. There are two neuro code that we"ll look into: pitch and where sound are coming from: soundwaves created by pure tone. Made with one nice sound frequency, making a smooth curve called sine waves. However, sound is more complex than what we hear. Rather than being nice and smooth, it"s more like rough, bumpy curves. Looking at the complex sound that are broken down into nice, smooth sine waves mathematically; it"s called the fourier analysis. We count by the numbers of peaks. Human can hear from 20 20,000 hz.