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sound level

A logarithmic scale that measures amplitudes; depends on the ratio of the pressure variation of a particular sound wave to the pressure variation in the most faintly heard sound; unit of measurement is the decibel. dB.

decibel

a logarithmic unit of sound intensity

pitch

the property of sound that varies with variation in the frequency of vibration

Doppler Shift

change in the apparent frequency of a wave as observer and source move toward or away from each other

closed-pipe resonator

a resonating tube with one end closed to air; its resonant frequencies are odd-numbered multiples of the fundamental

open-pipe resonator

a resonating tube with both ends open that also will resonate with a sound source; its resonant frequencies are whole number multiples of the fundamental

timbre

quality of a musical tone produced by a musical instrument (which distinguishes it from others of the same pitch)

fundamental

the lowest tone of a harmonic series

harmonic

A component of a complex tone; one of a series of tones whose frequency is a multiple of the fundamental frequency. In music theory, also known as an overtone

dissonance

harsh, inharmonious, or discordant sounds

consonance

the property of sounding harmonious

octave

a musical interval of eight tones

beat

produce a rhythm by striking repeatedly

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