PSY 3108 Lecture Notes - Lecture 5: Transverse Wave, Sound, Wave
23 Oct 2018
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Chapter 5: the auditory system i sound and the ear. Sound waves: objects make sound by moving back and forth rapidly, 20 - 2000 times/second through a medium (air) Like a dog whistle we can hear it: the cycle of this process creates alternating high-and low-pressure regions that travel through the air. In this case its the pressure not he air. Linear vs transverse waves: transverse wave, water or light, moving to the right but waving up and down. Longitudinal wave: looking at one molecules is just moving back and form, diaphragm bumps one molecule then that bumps another, creating areas of high pressure that travel, sound. Slow: low frequency, about 500 hz tone, you can see that the diagram is moving back and forth slowly. Fast: high frequency, higher the pitch of the sound, the diagram is moving back and forth twice as fast, getting more waves per second.
