Question

(a) A spherical source of radius a is operated in water at a frequency for which ka = 1. Evaluate the specific acoustic impedance at the source radius for this frequency. Find the error in calculating the acoustic intensity by the formula valid for ka << 1. (b) If the source strength of a small (ka << 1) spherical source is kept constant, find the frequency dependence of the radiated power. If this small source is operated with constant acceleration amplitude, find the frequency dependence of the radiated power.

Answer 1

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