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59. ·OIP BIO Standing Waves in the Human Ear The human ear: canal is much like an organ pipe that is closed at one end (at the tympanic membrane or eardrum) and open at theo Figure 14-38). A typical ear canal has a length of about 2.4 (a) What is the fundamental frequency and wavelength of canal? (b) Find the frequency and wavelength of the ear third harmonic. (Recall that the third harmonic in this cas standing wave with the second-lowest frequency.) (c) Suppose person has an ear canal that is shorter than 24 cm. Is the fund mental frequency of that persons ear canal greater than, les than, or the same as the value found in part (a)? Explain. N that the frequencies found in parts (a) and (b) correspon closely to the frequencies of enhanced sensitivity in Figure 141 (see . Outer ear Middle ear Inner ear Auditory Oval ossicles window Semicircular canals Nerves (to brain Cochle Vestilb comp Round windo Ear canal Tympanic membrane Internal jugular vein Eustac tube A FIGURE 14-38 Problem 59

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