Asound wave in air has a pressure amplitude equal to 3.92 x 103 n/m2. calculate the displacement amplitude of the wave at a frequency of 9.2 khz. (note: use the 1.20 kg/m3; the speed of sound in air is v 343 m/s. pressure variations ap are measured relative to following values, as needed. the equilibrium density of air is p atmospheric pressure, 1.013 x 105 pa.)