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Physics Exam II: Sound Waves

Across
_____ frequency transducers provide improved penetration
The number of complete cycles of an acoustic variable
Determined by the sound source and the medium
It's propagation speed of sound is 1540 m/sec
The frequency (in MHz) of a transducer with a 0.25 usec period
The time of a single cycle of sound
Reciprocal of frequency
Typical unit for power
Sound is a _____ mechanical wave
Wavelength's relationship to US frequency
Sound is a _____ longitudinal wave
Common US unit for frequency
Sound frequencies from 20 to 20 kHz
Sound frequencies below 2 Hz
Cause of the decrease of the 3 "bigness" prametersofsound
Down
Sound frequencies above 20 kHz
Directly related to the square root of the US power
The change between the average value and the maximum value of an acoustic variable
Location of the highest intensity within the US beam
The concentration of power over a specific area
Determines the period of US
_____ speed is the how fast US energy travels through a medium
Common unit for US period
The time at which work is done
Determines the propagation speed of US
Typical unit for US wavelength
Directly related to US power
An increase in this results in an increase in propagation speed of US
US power will _____ with increasing imaging depths