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ID: 1294593 • Letter: L
Question
LON- x C My Q x C Home x VE (4135 x 3 the fil x WE (4135 x Imag x VE Sound x Physio x Wolf LON LON https: c/46/92f45af4bf 1977 19e77 b5222 32 fd21b2c0d 50e93 c639foa6e9 367acb4d9d97d57e46a48 9doc 30101b3 d7a 8318920810402 87c8e 25307 Messages Courses Help Logout Joseph Raymond Zajac v Stud section: 730) PHY 233B Fall 2014. Main Menu l contents Grades Due in: 0 d 00:33:56 Timer Notes Evaluate Feedback Print Course Contents Exam #3 (Online 11/25 Tu between 11 AM and 11 PM) q 08 What is the sound level of a sound with an intensity of I 1.00x10-6 W/m2? Give your answer in dB units A: 10.84 B: 14.42 O C: 19.18 D: 25.50 OE: 33.92 F: 45.11 G: 60.00 H: 79.80 Sub Answer Answer Submitted: Your final submission will be graded when the time limit is reached Tries 1/12 Previous Tries Now the intensity of this sound is increased to a value of 29.0 times of its original intensity, What is the new increased sound level? Give your answer in dB units OAR 51.72OBB 58,44IOCR 66.04 ODR 74.62OER 84.33OF 95.29 OGB 107,67OHR 121.67 Sub Answer Tries 0/12 Communication Blocked Send Feedback 3:06 PM 25/2014Explanation / Answer
Intensity = 10*log(I/Io)
= 10*log1e-6/1e-12
= 60 dB
OPTION H
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I1 = 29*I
intensity = 10*log29 + 10*log e6
= 14.62 + 60 = 74.62 dB
OPTION D
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