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College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Suppose that when a certain sound intensity level (in dB) increases by a factor of 8, the sound intensity (in W/m2) also increases by the same factor. Determine this sound intensity level.
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- Two sound waves have intensities of 1 times 10 to the -5 W/m2 and 5 times 10 to the -4 W/m2. What is the difference in their intensities levels (db)? I0 = 10 to the -12 W/m2.arrow_forwardProblem 4. A point source emits sound waves uniformly in all directions. At distance 90.0 m from the source the sound intensity level is 15 dB. At what distance from the source is the sound intensity level 35 dB?arrow_forwardWhat is the decibel level of a sound that has an intensity of 10.4 x 10-5 W/m2? Assume the standard dB level scale where the reference intensity is 1 x 10-12 W/m2arrow_forward
- The higher frequency limit for human hearing is 23.9 kHz. If the air temperature is 12.2 °C, the corresponding wavelength (mm; millimeter) of the sound is:arrow_forwardA noise has an intensity of 2.4×10-8 W/m2. If the threshold of human hearing is I0 = 1.0×10-12 W/m2, calculate the sound intensity level in dB. Use two digits of precision for your answer.arrow_forward(a) The intensity of the sound from a certain MP3 player (without earbuds) is 4.1 × 10−5 W/m2. Find the intensity level in decibels. (Round your answer to the nearest whole number.) dB(b) The intensity of the sound of the MP3 player in part (a) with earbuds is 5.0 × 10−3 W/m2. Find the intensity level in decibels. (Round your answer to the nearest whole number.) dBarrow_forward
- By measurement you determine that sound waves are spreading out equally in all directions from a point source and that the intensity is 2.9x10-2 W/m² at a distance of 4.0 m from the source.arrow_forwardThe intensity of a certain sound wave is 4.0 x 10-4 W/m2. If the intensity level of the sound increases by 30 dB, the intensity has increased to which of the following: 1.2 x 10-2 W/m2 4.0 x 10-2 W/m2 4.0 x 10-1 W/m2 1.33 x 10-1 W/m2arrow_forward
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