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Ms. Smiley's Science

Light and Sound Ch 2

QuestionAnswer
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
Created by: mwalstro