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Section 2.2 PROPERTIES of Sound
properties of sound
10
Science
6th Grade
02/01/2013

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Term
pitch
Definition
a measure of how high or low a sound seems to be.
Term
Doppler Effect
Definition
causes a sound in front of a moving sound source to seem to have a higher pitch and frequency.
Term
loudness
Definition
a measure of how well a sound can be heard.
Term
decibel
Definition
the most common unit used to measure loudness (symbol, dB)  Sounds with 120 of these can be painful.
Term
Hertz
Definition
units for expressing frequency
Term
ultrasonic
Definition
sounds that have a frequency too high for people to hear.
Term
rarefactions
Definition
represented by the troughs on a graph from an oscilloscope, spread apart in a wave.
Term
medium
Definition
speed of sound varies from one to another, (solid, liquid, or gas.)
Term
amplitude
Definition
When it is larger, the sound is louder.
Term
oscilloscope
Definition
used to graph representations of sound wave.
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