Answer 6_3_5
(a) 10-12 W/m2. This occurs in the range 1000 to 3500 Hz
(b) The region of discomfort is at intensities of about 10 W/m2 to about 100 W/m2. Pain occurs at any intensity above this. It is not frequency dependent.
(c) At 10-6 W/m2 the hearing limits are from about 50 Hz to 15000 Hz.