strength of a simple source
2.79 strength of a sound source; strength of a simple source. Maximum instantaneous rate of volume displacement produced by a source when emitting a sound wave with sinusoidal time variation. Unit, cubic meter per second (m3/s). Annotation “Strength” is properly applicable only to sources of dimensions small with respect to the wavelength.
strength of a sound source
2.79 strength of a sound source; strength of a simple source. Maximum instantaneous rate of volume displacement produced by a source when emitting a sound wave with sinusoidal time variation. Unit, cubic meter per second (m3/s). Annotation “Strength” is properly applicable only to sources of dimensions small with respect to the wavelength.
omnidirectional sound source
2.78 simple sound source; omnidirectional sound source. Source that radiates sound uniformly in all directions under acoustic free-field conditions. Annotation See 5.08 for definition of free field.
simple sound source
2.78 simple sound source; omnidirectional sound source. Source that radiates sound uniformly in all directions under acoustic free-field conditions. Annotation See 5.08 for definition of free field.
fall time
2.77 fall time. Time for a physical quantity to fall from 90% of its initial value to 10% of its initial value. Annotation For an exponentially decaying quantity the fall time is approximately 2.1972 times the time constant.