Question: (a) A novice hunter becomes lost in a large open area, and he begins to call for help. The acoustic power level of his

(a) A novice hunter becomes lost in a large open area, and he begins to call for help. The acoustic power level of his frantic voice is 98.6 dB at a frequency of 105 Hz. The ambient air is at 20C with a relative humidity of 10%. The desperate hunter has a directivity factor of Q = 1. A. spherical source of sound produces an acoustic pressure of 2 Pa at a distance of 1.20 m from the source in air at 25C and 101.3 kPa. i. Determine the rms acoustic particle velocity, the acoustic energy density and the frequency of the sound wave is 525 Hz. ii. Acoustic intensity for the sound wave at 1.20 m from the source and at a distance of 2.50 m from the source.

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