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1 Ch - Phy Sc M 9B

Physics - Waves & Sounds (Apologia Physical Science M 9B)

QuestionAnswer
supersonic speed any speed that is faster than the speed of sound in the medium of interest
Mach speed unit measuring in terms of the speed of sound
sonic boom the thunder-like sound produced as a result of an object traveling at or above Mach 1
intensity the rate at which a wave's energy flows through a given area
decibels (dB) measurement of sound intensity
pitch an indication of how high or low a sound is, which is primarily determined by the frequency of the sound wave
Sound waves with low pitch have low frequency.
Sound waves with high pitch have high frequency.
sonic waves longitudinal waves which are able to be detected by human ears, generally between 20 Hz and 20,000 Hz
ultrasonic waves waves with a frequency higher than 20,000 Hz
infrasonic waves waves with a frequency lower than 20 Hz
Doppler effect a change in sound frequency caused by the motion of the sound's source, motion of the listener, or both
sonar emits ultrasonic waves and then uses sensors to detect the reflected portions of those waves and create an image of any obstruction in their path
Created by: MrsHough
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