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Sound Study Guide

Learn these key terms to help you prepare for the test.

TermDefinition
Echo A reflected sound wave.
Elasticity Ability of a material to bounce back once disturbed
Density Unit of mass per volume
Loudness the perception of energy of sound
intensity the amount of energy a sound wave carries per second.
Decibel unit that measures loudness of a sound
Pitch how high or low a sound seems
Ultrasound Sound waves with frequencies above the normal human range of hearing
Infrasound Sounds with frequencies below the human range of hearing.
Doppler Effect The change in frequency of a wave as its source moves in relation to an observer
Music a set of notes that combine in patterns that are pleasing.
Fundamental Tone The lowest natural frequency of an object
Overtone The object’s higher natural frequencies
Acoustics study of how sounds interact with each other and the environment.
ear canal narrow area that leads to the ear drum
ear drum a small, tightly stretched, drumlike membrane
cochlea a fluid-filled cavity shaped like a snail shell
echolocation the use of reflected sound waves to determine distances or to locate objects.
Sonar A system that uses reflected sound waves to detect and locate objects underwater
Created by: MrCscience