If the bell is placed on the patient, the vibrations of the skin directly produce acoustic pressure waves traveling up to the listener's ears.
12.
If the diaphragm is placed on the patient, body sounds vibrate the diaphragm, creating acoustic pressure waves which travel up the tubing to the listener's ears.
13.
"' Sound pressure "'or "'acoustic pressure "'is the local pressure deviation from the ambient ( average, or equilibrium ) atmospheric pressure, caused by a sound wave.
14.
Acoustic pressure fluctuations ( sound waves ) created by air turbulence alter the speed of light locally, he says, which slightly changes the laser beam's transit time.
15.
The superheated air pulses across the metal at 100 times per second with a pounding acoustic pressure that packs twice the power per inch of Hurricane Andrew.
16.
The physical quantity may be a variable electric current or voltage, the intensity, phase or electromagnetic field, acoustic pressure, the magnetization of a magnetic storage media, etcetera.
17.
"' Acoustic impedance "'and "'specific acoustic impedance "'are measures of the opposition that a system presents to the acoustic flow resulting of an acoustic pressure applied to the system.
18.
Sound pressure levels can go up to 150 dBSPL . Acoustic tests are used to verify the mechanical resistance of the satellite and its elements to acoustic pressures generated.
19.
Where \ nabla ^ 2 is the Laplace operator, p is the acoustic pressure ( the local deviation from the ambient pressure ), and where c is the speed of sound.
20.
Several researchers have also extended the model to include the nonlinear effects of finite amplitude acoustic propagation ( propagation in cases where sound speed is not constant but is dependent upon the instantaneous acoustic pressure ).
