sound vocabulary grade 5
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SOUND UNIT VOCABULARY
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SOUND WAVES
Vibrations that spreads away from a
vibrating object• Drop a pebble into a pond the
waves go away from where the pebble was dropped
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RAREFACTION
Part of a sound wave where molecules are spread
out
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HERTZ
how frequency is measured (one vibration/second
is one hertz Hz)• Unit of measure
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VOLUME
how loud or soft something is (depends on the
amount of energy in the sound wave)
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DECIBEL
how volume is measured (dB) F 59 Chart of
decibels
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ECHO
reflected sound wave (singing in the shower)
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ECHOLOCATION
finding things or navigating using sonar (bats,
whales, dolphins use this) Echolocation
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DOPPLER EFFECT
change in frequency and pitch as a sound moves
towards or away from you (named for scientist
Christian Doppler who discovered it)
Doppler
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QUALITY
what makes a sound different from another sound
of same volume and pitch (2 singers same note,
same pitch, one is better)
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FUNDAMENTAL
main or basic (fundamental frequency is the lowest
frequency something vibrates, guitar string after it is
strummed)
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OVERTONE
vibrating at a higher frequency (more times) than
the fundamental
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RESONANCE
a fullness and richness of sound, build up of
vibration (it “resonates” with you)
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MICROPHONE-
an instrument that amplifies sound
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ABSORPTION
disappearance of a sound wave into a surface
(think of a towel absorbing) hard surfaces sounds
bounce off, soft ones it absorbs