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Ch 16 Sound Vocab

3.Ewan.Bentley Ch 16

echo A reflected sound wave
elasticity The ability of a material to bounce back after being disturbed
density How much matter is in an object
loudness The human perception of the energy of sound
intensity The amount of energy per second carried through a unit area by a wave
decibel A unit used to compare the loudness of different sounds
pitch Perception of the frequency of a sound.
ultrasound Sound waves with frequencies above 20,000 Hz.
infrasound Sound waves with frequencies below 20 Hz.
larynx 2 folds of tissue that make up the human voice box
Doppler effect The change in frequency of a wave as its source moves in a relation to an observer.
music A set of tones and overtones combined in ways that are pleasing.
fundamental tone The lowest natural frequency of an object.
overtone an natural frequency that is an multiple of the fundamental tones frequency
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 A narrow region leading from the outside of the human ear to the eardrum.
ear drum A small, tiny tightly stretched, drumlike membrane in the ear.
cochlea a fluid filled cavity in the inner ear that is shaped like an snail shell
echolocation The use of reflected sound waves to determine distances or to locate objects.
sonar an system that uses reflected sound waves to detect and locate objects underwater.
sonogram The device that uses reflected ultrasound waves coming from the body.