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17 Cards in this Set

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Doppler effect
the change in frequency (and pitch) as a source of sound moves toward or away from you
echolation
the finding of an object by using reflected sound
echo
a reflected sound wave
quality
the difference you hear in two sounds of the same loudness and pitch
sound wave
a vibration that spreads away from a vibrating object
matter
anything that has mass and takes up space
vibration
a back-and-forth movement
compression
the part of a sound wave where molecules are crowded together
rarefaction
the part of a sound wave where molecules are spread apart
overtone
one of a series of pitches that blend to give a sound its quality
pitch
how high or low a sound is
fundamental frequency
the lowest frequency at which an object vibrates
frequency
the number of times an object vibrates per second
hertz
a unit for measuring frequency
absorption
the disappearance of a sound wave into a surface
decibel
a unit for measuring loudness
reflection
the bouncing of a sound wave off a surface