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How far must you be from a 110 W speaker to have a sound level of...

How far must you be from a 110 W speaker to have a sound level of 70.0 dB? (Hint: What is the intensity there?) (Treat the speaker as a point source) Unit = m
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Answer #1

Power of the speaker = P = 110 W

Distance from the speaker = R

Sound level at this distance from the speaker = = 70 dB

Sound intensity at this distance from the speaker = I

The power of the speaker is distributed equally in a spherical manner.

R = 935.6 m

Distance from the 110 W speaker to have a sound level of 70 dB = 935.6 m

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