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6th Grade - Chapter 2 Sound

Terms in this set (16)

decibel
The most common unit used to express loudness
Doppler effect
An observed change in the frequency of a wave when the source or observer is moving.
Echo
A reflected sound wave.
Echolocation
The process of using reflected sound waves to find objects.
Interference
The combination of two or more waves that result in a single wave
Longitudinal
A wave in which the particles of the medium vibrate parallel to the direction of the wave motion.
Loudness
The extent to which a sound can be heard.
Pitch
A measure of how high or low a sound is perceived to be , depending on the frequency of the sound wave.
Resonance
A phenomenon that occurs when two objects naturally vibrate at the same frequency.
Sonar
A system that uses acoustic signals and returned echoes to determine the location of objects, or to communicate.
Soundwave
A longitudinal wave that is caused by vibrations and that travels through a material medium.
Ultrasound
Sound waves with frequencies above 20,000 Hz.
Wavelength
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Amplitude
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Crest
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Trough
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