PSY 166 Lecture 8: The Ear and Sound
8 Jan 2019
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Document Summary
A speaker moves forward from its normal position, it compresses the air molecules together, and when it goes back to its regular position, it creates a vacuum in the air in front of it. When a person cranks up the stereo in the car, you feel the boom in your chest the most because of the air compressions which happen in your lungs which hold air. Compressions of air moving towards you go to your ear and that is sound. We talk about waves in terms of cycles. One cycle is one wave of compressed pressure (crest) and then one section of decreased pressure (trough) As the amplitude gets bigger as compression gets tighter, we hear that as a louder sound. The more violent the compression the tighter the compression the louder the sound. How sensitive is the organism to sound: some animals have sensitive hearing, snakes are very sensitive.
