M[dB] 26 dB 20 dB 10 dB 6 dB 0 0.1 I 100 1000 w (rad/s) Figure P9.21: Bode magnitude diagram for Problem 9.21.
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- The pan flute is a musical instrument consisting of a number of closed-end tubes of different lengths. When the musician blows over the open ends, each tube plays a different note. The longest pipe is 0.33 m long. What is the frequency of the note it plays?The n vs. f graph below is for a newly discovered material. Please note that the metric prefix "T" represents "tera-", 1 THz = 10¹ Hz. n vs. f GRAPH n 201 1.9 1.8 1.7 1.6 500 600 700 f (THz) 800 In this material, which frequency has the greatest speed? 800 THE In this material, which frequency has the lowest speed?The softest sound a human ear can hear is at 0 dB (Io = 10-12 W/m2). Sounds above 130 dB cause pain. A particular student's eardrum has an area of A = 51 mm^2. a. What is the most power, in watts, the ear can receive before the listener feels pain? b. What is the smallest power, in watts, the ear can detect?
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