Physics-Ch. 2 Flashcards
Sound is what type of wave?
Mechanical
What is a longitudinal wave?
Sound waves
Acoustic propagation properties
The effects of the medium upon the sound wave
What are the biological effects?
The effects of the sound wave upon the biological tissue through which it passes.
Sound waves are identified by?
Acoustic variables
Name the three acoustic variables
Pressure
Density
Distance
What is pressure and the unit of pressure?
Concentration of force in an area
Pascals (pa)
What is density and the unit?
Concentration of mass in a volume
Kg/ cm^3
What is distance and the unit?
Measure of particle motion
Cm, feet, mile
What describes the waves features and how many are there?
Acoustic Parameters
Seven
What are the seven acoustic parameters?
Period Frequency Amplitude Power Intensity Wavelength Propagation speed
What kind of wave moves perpendicular to the direction that the wave propagates?
Transverse
What kind of wave moves in the same direction that the wave propagates?
Longitudinal wave
Which wave has their peaks occur at the same time and at the same location?
In phase wave
“In step”
What waves have their peaks occur at different times?
Out of phase
Out of step wave
When multiple beams arrive at an identical location at exactly the same time and waves lose their individual characteristics at that moment and combine to for a single wave is?
Interference
When a pair of in phase waves results in the formation of a single wave of greater amplitude than either of its components & the resulting wave is larger than either of the components is what?
Constructive interference
A pair of out of phase waves results in the formation of a single wave of lesser amplitude than at least one of its components & the resulting wave is smaller than one of its components it’s called?
Destructive interference
