Chapter 21: Sound. Pages 532 - 557. Sound is a form of energy produced by the vibration of matter. Sound is a compressional or longitudinal wave Ex. Spring Sound is transmitted through solids, liquids, and gases. Sound is transmitted better through solids and liquids. Why? More dense
Chapter 21: Sound
Pages 532 - 557
vibrates ear drum
amplified by bones
converted to nerve impulses in cochlea
Ultrasonic: higher than 20,000 Hz
Uses: clean jewelry, medical applications
Infrasonic: lower than 20 Hz
Found: in the atmosphere and in the crust when plates move; also an indication motion sickness
“Sound Navigation and Ranging”
can hear them.
Constructive - louder
Destructive - softer
Anechoic chamber - designed to eliminate reverberation.