OSHA, the Occupational Safety and Health Administration, has established standards for workplace exposure to noise. According to OSHA's Hearing Conservation Standard, the permissible noise exposure per day is 95.0 dB for 4 hours or 105 dB for 1 hour. Assuming the eardrum is 9.5 mm in diameter; find the energy absorbed by the eardrum

(a) With 95.0 dB for 4 hours and

(b) With 105 dB for 1 hour.

(c) Is OSHA's safety standard simply a measure of the amount of energy absorbed by the ear? Explain.