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Physics Midterm

What is the literal meaning of Sonography? writing with sound
What two things must a transducer know to create an image? location(origin) and strength of returning echoes
Brightness is determined by ___? echo strength
Location is determined by? direction of travel, distance from transducer, and time for round trip travel(time=propagation speed)
propagation speed how fast sound travels through a medium
Doppler effect change in frequency of sound wave
Sound is a _____, _____, _____ wave. mechanical, longitudinal, compressional
Longitudinal vs transverse waves Longitudinal=parallel Transverse=perpendicular
Compression areas of high pressure (max)
Rarefaction areas of low pressure (min)
Properties of a mechanical wave Must travel though matter, cannot go through a vacuum, carries energy and inofrmation
Describes how many complete cycles occur in one second Frequency (Hertz); Typical Diagnostic range: 2-10MHz
Created by: tatheerr