Practice_Exam_2 - Note Since the practice exam is being...

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Note: Since the practice exam is being published ~ 1 week before the exam there may be a few additional topics covered on the actual exam which are not in the practice exam. The number of questions covering certain topics will change. 1. Sound is actually detected in which part of the human ear? A. The outer ear (Pinna) B. The eardrum (Tympanic membrane) C. Middle ear (Hammer, Anvil and Stirrup) D. Cochlea (Basilar membrane) 2. Many commercial inset repellers are based on the claim that many insects are sensitive to high-frequency sounds in the range of 30,000-50,000 Hz. How would these sound waves be classified? A. Supersonic B. Audible C. Infrasonic D. Ultrasonic 3. You are standing 3 meters from a loudspeaker, and hear a certain sound intensity. If you move to a spot that is only 1 meter away from the loudspeaker, the sound intensity you hear will be A. 3 times as much as before. B. 9 times as much as before. C. only 1/3 as before. D. only 1/9 as before. 4. The bending of a wave (sound or light) because of a speed change as it goes from one medium to another is called A. refraction. B. reflection. C. diffraction. D. Doppler effect. 5. If thunder is heard 3 seconds after lightening is seen, how far way did it originate? Assume the speed of sound = 343 m/s and 1,600 m = 1 mile. A. 0.64 miles B. 1.03 miles C. 6.4 miles D. 1029 miles 6. The walls of a room are covered with some soft material. This will A. reduce the reflections or echoes of sound. B. result in a long reverberation time for the room. C. have no effect on the room acoustics. D. increase the reflections or echoes of sound.
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7. At the beginning of the halftime show, a lone trumpeter stands at center field and begins to play. In the front row of the stands, you register a sound intensity level of 60 dB. The soloist repeats the opening melody, but is now joined by nine more trumpeters, each playing with the same intensity as the soloist (who is still playing at the same intensity as before). What is the intensity level when the soloist is joined by his/her colleagues? A.
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This note was uploaded on 05/08/2011 for the course P SC 105 taught by Professor Lee during the Spring '10 term at Ohio University- Athens.

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Practice_Exam_2 - Note Since the practice exam is being...

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