Solution Found!
Solved: (a) Estimate the power output of sound from a
Chapter 13, Problem 13P(choose chapter or problem)
(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 \(100 \mathrm{~W}\) of ordinary conversation? [Hint: Add intensities, not dB's.]
Questions & Answers
QUESTION:
(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 \(100 \mathrm{~W}\) of ordinary conversation? [Hint: Add intensities, not dB's.]
ANSWER:Step 1 of 3
(a)
The expression for the output power is given by;
Here is the power, is the intensity and is the area.
The surface area of the sphere is . So the output power of the sound wave can be taken as