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Sound
Vocabulary for Chpt 21 - Sound
10
Science
7th Grade
01/19/2012

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Term
Doppler effect
Definition
Change in frequency or pitch of a sound that occurs when the sound source and the listner are in motion relative to each other.
Term
Eardrum
Definition
Membrane stretching across the ear canal that vibrates when sound waves reach the middle ear.
Term
Echo
Definition
A reflected sound wave.
Term
Fundamental frequency
Definition
Lowest natural frequency that is produced by a vibrating object.
Term
Loudness
Definition
The human perception of how much energy a sound wave carries.
Term
Natural frequency
Definition
Frequency at which a musical instrument or other object vibrates when it is struck or disturbed; relative to its size, shape, and the material it is made from.
Term
Overtones
Definition
Multiples of the fundamental frequency.
Term
Pitch
Definition
How high or low a sound is.
Term
Resonance
Definition
Sound amplification that occurs when an object is vibrated at its natural frequency by absorbing energy from a sound wave or other object vibrating at this frequency.
Term
Reverberation
Definition
Repeated echoes of sounds.
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