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Sound Vocabulary

Chapter 16 Sound Vocabulary

TermDefinition
Sound A disturbance that travels through a medium as a longitudinal wave
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 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) A unit that compares the loudness of different sounds
Pitch A 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 waves with frequencies below the normal human range of hearing
Larynx Voice box
Doppler Effect The change in frequency of a wave at its source moves in relation to an observer
What causes 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
What causes a Sonic Boom? When a shock wave releases a huge amount of energy, the loud noise people hear is a sonic boom.
Fundamental Tone The lowest 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 echos of a sound are heard after the sound source stops producing sound waves
Ear Canal The narrow region in an ear that sound waves pass through
Ear Drum A small, tightly stretched, drum-like membrane
Cochlea A fluid-filled cavity shaped like a snail shell
Echolation The use of reflected sounds to determine distances or to locate objects
Sonar A system that uses reflected sound waves to detect and locate objects underwater
Sonogram The picture created from the reflected ultrasound
Created by: aveberry