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Chapter 21 vocab
vocab chapter 10
14
Science
8th Grade
02/14/2013

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Term
Sound Wave
Definition
A longitudinal wave caused by vibrations and carried throughout a substance.
Term
Medium
Definition
Substance through which a wave can travel.
Term
Pitch
Definition
How low or high a sound seems to be.
Term

Doppler Effect

 

Definition
is the apparent change in frequency of a sound caused by the motion of either the listener or the source of the sound.
Term

Loudness 

 

Definition
extent to which a sound can be heard.
Term
Decibel (dB)
Definition
Unit used to express loudness.
Term
Echo
Definition
a reflected sound wave
Term
Echolocation
Definition
the process of using reflected sound waves to find an object.
Term
Interferance
Definition
when two waves overlap.
Term
Sonic Boom B-)
Definition
Is the explosive sound of a shock wave as it reaches your ear.
Term
Standing Wave
Definition
is the pattern of vibration that looks like a wave that is standing still.
Term
Resonance
Definition
happens when an object vibration or near a resonant frequency of a second object causing it to vibrate.
Term
Sound Quality
Definition
the result of the blending of several pitches through interference.
Term
Noise
Definition
A sound that consists of a random mix of frequencies.
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