Sound Flashcards
Waves carry ______ from one location to another.
energy
True or False: Sound is a mechanical wave in which particles in a medium move
True
Define acoustic propagation properties
Effects of medium upon sound wave
What is an example of an acoustic propagation property?
Attenuation
Define Biological effects (bioeffects)
The effects of the sound wave on the tissue
True or False: Sound can travel through a vaccum
False
Sound waves require a ______.
medium
When molecules are squeezed together they are ________.
compressed
When molecules are stretched apart they are _______.
rarified
Sound travels in a _______ line.
straight
True or False: Sound waves are longitudinal waves
True
Define Acoustic Variables
Changes that occur within a medium as a result of sound propagation
Sound waves are also known as ______ waves.
acoustic
Name the three acoustic variables?
pressure, density, distance (particle motion)
Define pressure and its units
Concentration of force in an area; pascals (Pa)
Define density and its units
Concentration of mass in a volume; kg/cm^3
Define distance and its units
Measure of particle motion; cm, feet, mile
How many acoustic variables are required to be considered a sound wave?
One
What is used to describe a sound wave?
Acoustic parameters
Why are transverse waves not diagnostic?
Particles move in a direction that is perpendicular to the direction of wave propagation
In a longitudinal wave, particles move in the ______ direction that the wave propagates.
same
In-phase waves have peaks and troughs that occur at ______ time.
same
Out of phase waves have peaks and troughs that occur at _____ times.
different
The combination of sound waves is called?
interference
When waves have constructive interference, the final amplitude is ______ .
greater
When waves have destructive interference, the final amplitude is ______.
smaller
In what type of interference do waves completely cancel each other out?
Complete destructive interference
