A 60-dB sound wave strikes an eardrum whose area is 5.0 x 105 m². The intensity of the reference level required to determine the sound level is 1.0 x 10-12 W/m². 1 yr 3.156 x 107 s. How much energy is absorbed by the eardrum per second? Express your answer to two significant figures. 1977 ΑΣΦ P= 11

A 60-dB sound wave strikes an eardrum whose area is 5.0 x 105 m². The intensity of the reference level required to determine the sound level is 1.0 x 10-12 W/m². 1 yr 3.156 x 107 s. How much energy is absorbed by the eardrum per second? Express your answer to two significant figures. 1977 ΑΣΦ P= 11

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter17: Sound Waves

Section: Chapter Questions

Problem 17.20P: The area of a typical eardrum is about 5.00 X 10-5 m2. (a) (Calculate the average sound power...

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Some studies suggest that the upper frequency limit of hearing is determined by the diameter of the eardrum. The wavelength of the sound wave and the diameter of the eardrum are approximately equal at this upper limit. If the relationship holds exactly, what is the diameter of the eardrum of a person capable of hearing 20 000 Hz? (Assume a body temperature of 37.0C.)
(a) What is the speed of sound in a medium where a 100kHz frequency produces a 5.96cm wavelength? (b) Which substance in Table 17.1 is this likely to be?
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