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**Unformatted text preview: **Physics 198 Exam 2 Fall 2011 21. What is the range of hearing? A) 1 Hz – 1 KHz B) 10 Hz – 10 KHz C) 20 Hz – 20 KHz D) 40 Hz – 40 KHz E) 220 Hz – 1200 Hz 22. Where is the Basilar membrane located? A) Positioned inside outer ear B) Positioned inside middle ear C) Separates middle ear and outer ear D) Separates outer ear and middle ear E) Positioned inside cochlear 23. Assume that the outer ear canal is a cylindrical pipe 2.50 cm long, closed at one end by the eardrum. Calculate the resonant frequency of this pipe. (For speed of sound use 343m/s.) A) 1830 HZ B) 2840 HZ C) 3430 Hz D) 4250 Hz E) 5158 Hz Solution: Hz m s m L v v f L 3430 025 . 4 / 343 4 4 = ⋅ = = = = λ λ 24. Which equation is correct? ) A 2 log 3 ) 2000 log( + = ) ) ) ) E D C B 1000 log 2 ) 2000 log( 3 log 2 ) 2000 log( 2 log 3 ) 2000 log( 3 log 2 ) 2000 log( = = = + = Page 1 of 7 Physics 198 Exam 2 Fall 2011 Solution: ( 29 [ ] 2 log 3 ) 2 log( ) 1000 log( 1000 ) 2 ( log ) 2000 log( + = + = ⋅ = 25. According to Fechner law, as stimuli are increased by multiplication, sensation increases by A) Multiplication B) Addition (logarithmic scale) C) Exponentially (as a power of stimuli) D) At low frequencies by multiplication, and at high frequencies by addition E) None of the above 26. If the force applied to a linear system is doubled, what happens with response? A) Response is multiplied by log2 B) Response is doubled C) Response is quadrupled D) All of the above answers are correct E) None of the above answers are correct 27. Suppose that the sound from a speaker is emitted with equal intensity in all directions. If the sound power, W , emitted from the speaker is 12.57 watts, what is the sound intensity, , emitted from the speaker is 12....

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