Sound Flashcards
All waves carry ___ from one location to another.
energy
Sound pulses created by a transducer travel through biologic tissue called
media
Sound waves are described as _____ and longitudinal.
mechanical
Term that describes molecules being squeezed together
compression
Term that describes molecules being stretched apart
rarefaction
The effects of the medium upon the sound wave
acoustic propagation properties
effects of sound wave upon medium
biologic effects
three acoustic variables that identify sound waves
pressure
density
distance
units of pressure
pascals
units of density
kg/cm cubed
units of distance
cm
mm
concentration of force in an area
pressure
concentration of mass in a volume
density
measurement of particle motion
distance
acoustic parameters that describe sound waves
intensity power amplitude frequency period wavelength speed
particle motion in a transverse wave
perpendicular
particle motion in a longitudinal wave
parallel
a pair of waves are considered ____ when their peaks occur at the same time and at the same location
in-phase
when two waves are _____ their peaks occur at different times and so do their troughs
out-of-phase
when waves lose their individual characteristics and combine to form a single wave
interference
interference of a pair of in-phase waves results in the formation of a single wave of greater amplitude called
constructive interference
when two out-of-phase waves combine to form a single wave of lesser amplitude
destructive interference
when two out-of-phase waves are of equal amplitude, this may occur
complete destructive interference
when waves of different frequencies interfere, what type of interference occurs
both constructive and destructive interference occur
