The size of your eardrum (the tympanum; see Fig. 1 in Insight 14.2, The Physiology and Physics of the Ear and Hearing) partially determines the upper frequency limit of your audible region, usually between 16 000 Hz and 20 000 Hz. If the wavelength is on the order of twice the diameter of the eardrum and the air temperature is 20 oC, how wide is your eardrum? Is your answer reasonable?
Answer to relevant QuestionsOn hiking up a mountain that has several over-hanging cliffs, a climber drops a stone at the first cliff to determine its height by measuring the time it takes to hear the stone hit the ground. (a) At a second cliff that is ...(a) If the distance from a point sound source triples, the sound intensity will be (1) 3, (2) 1/3, (3) 9, (4) 1/9 times the original value. Why? (b) By how much must the distance from a point source be increased to reduce ...The intensity levels of two people holding a conversation are 60 dB and 70 dB, respectively. What is the intensity of the combined sounds? If the distance to a sound source is halved, (a) Will the sound intensity level change by a factor of (1) 2, (2) 1/2, (3) 4, (4) 1/4, or (5) none of the preceding? Why? (b) What is the change in the sound intensity level? An office in an e-commerce company has fifty computers, which generate a sound intensity level of 40 dB (from the keyboards). The office manager tries to cut the noise to half as loud by removing twenty-five computers. Does ...
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