The loudness level of a sound, D, in decibels, is given by the formula
where I is the intensity of the sound, in watts per
Decibel levels range from 0, a barely audible sound, to 160, a sound resulting in a ruptured eardrum. Use the formula to solve Exercises 91 -92.
The sound of a blue whale can be heard 500 miles away, reaching an intensity of
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