(II) (a) Estimate the power output of sound from a person
Chapter 12, Problem 20P(choose chapter or problem)
Problem 20P(II) (a) Estimate the power output of sound from a person speaking in normal conversation. Use Table 12–2. Assume the sound spreads roughly uniformly over a sphere centered on the mouth. (b) How many people would it take to produce a total sound output of 60 W of ordinary conversation? [Hint: Add intensities, not dBs.]
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