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9 Cards in this Set

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  • Back
sound level
because of the wide range in pressure variations that humans can detect, these amplitudes are measured on a logarithmic scale
decibels (db)
measurement of sound level
pitch
frequency of a sound wave
Doppler Shift
a change in sound frequency due to the relative motion of either the source or the detector
sound waves
they move through air, cuz a vibrating source produces regular oscillations in air pressure, air molecules collide, transmitting the pressure variations away from source of sound
sound
longitudinal, motion of air molecules is parallele to direction of motion of waves
speed of sound
depends on temperature of air
echoes
sound waves reflected off of walls
loudness
measured by the amplitude (amplitude measures variation in pressure along a wave)