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14.5 When the volume knob is turned up, the sound level changes from 50 dB to...

14.5 When the volume knob is turned up, the sound level changes from 50 dB to 87 dB. What is the ratio of the intensities in W/m2 ?

14.6 If the sound intensity level in decibels at a location 42 m from a spherical source is 37 dB, what is the power output of the source?

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