sound-energy flux

2.69  sound-energy flux. Time-average of the time rate of flow of sound energy through a specified area. Unit, watt (W); symbol,...

spectrum density

2.46  spectrum density. Limit, as the bandwidth approaches zero, of the quotient of mean-square value of an acoustic variable by bandwidth....

wave number

2.28  wave number. (a) 2π divided by the wavelength of a periodic wave. (b) Angular frequency divided by speed of sound. Unit, reciprocal meter (1/m); symbol k =...

wavelength

2.27  wavelength. For a simple harmonic wave in an isotropic medium, perpendicular distance between two wavefronts in which the displacements have a difference in phase of 2π radians. Unit, meter (m); symbol λ,  λ = c /...

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