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Chapter 16

SOUND Vocabulary

TermDefinition
Echo A reflected sound wave
Elasticity The ability of a material to bounce back after being disturbed
Density How much matter, or mass, there is in a given amount of space, or volume
Loudness Describes your perception of the energy of a sound
Intensity The amount of energy a sound wave carries per second through a unit area
Decibel (dB) The loudness of different sounds compared
Pitch The description of how high or low the sound seems to a person
Ultrasound Sound waves with frequencies above the normal human range of hearing
Infrasound Sounds with frequencies below the human range of hearing
Larynx Where you vocal cords are located
Doppler Effect The change in frequency of a wave as its source moves in relation to an observer
Causes of the Doppler Effect When a sound source moves, the frequency of the waves changes because the motion of the source adds to the motion of the waves
Causes of a Sonic Boom A shock wave forms as the sound waves overlap, which causes the shock wave to release a huge amount of energy.
Fundamental Tone The lowest natural frequency of an object
Overtone The object's higher natural frequencies
Acoustics The study of how sounds interact with each other and the environment
Reverberation The echoes of a sound are heard after the sound source stops producing sound waves
Ear Canal It collects sound waves and directs them into a narrow region (ear canal)
Eardrum A small, tightly stretched, drum like 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 under water
Sonogram The device uses the reflected ultrasound waves to create a picture
Created by: Swilson588
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