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Ms. Smiley's Science
Light and Sound Ch 2
Question | Answer |
---|---|
vibration | the complete back-and-forth motion of an object |
sound wave | a longitudinal wave caused by vibrations |
cochlea | part of the inner ear that changes vibrations into electical signals sent to the brain |
eardrum | a membrane that is the entrance to the middle ear |
pitch | a measure of how high or low a sound seems to be |
Doppler effect | the observed change in frequency of a wave when the source or observer is moving |
decibel | the most common unit used to measure loudness |
echo | a reflected sound wave |
interference | the combination of two or more waves that results in a single wave |
noise | any sound that is a random mix of frequencies or pitches |