Question

At a rock concert, a dB meter registered 130 dB when placed 2.2 m in front of a loudspeaker on the stage. a. What was the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in the air? b. How far away would the sound level be a somewhat reasonable 95 dB ? answer with units

Name: at a rock concert a db meter registered 130 db when placed 22 m in front of a loudspeaker on the stage a what was the power output of the speaker assuming uniform spherical spreading of the 38308
Uploaded: 2022-07-27T13:32:03-08:00
Duration: 3 min 9 s
Channel: Timothy James
Description: at a rock concert a db meter registered 130 db when placed 22 m in front of a loudspeaker on the stage a what was the power output of the speaker assuming uniform spherical spreading of the 38308

          At a rock concert, a dB meter registered
130 dB when placed 2.2 m in front of a
loudspeaker on the stage.
a. What was the power output of the speaker, assuming
uniform spherical spreading of the sound and neglecting absorption
in the air?
b. How far away would the sound level be a somewhat
reasonable 95 dB ? answer with units

Added by Hector G.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Timothy James

07/27/2022

Step 1

Given: - Sound level (dB) = 130 dB - Distance from speaker (d) = 2.2 m Using the formula for sound intensity in decibels: \[ 130 = 10 \log_{10} \left( \frac{I}{I_0} \right) \] \[ 13 = \log_{10} \left( \frac{I}{10^{-12}} \right) \] \[ 10^{13} = \frac{I}{10^{-12}} Show more…

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At a rock concert, a dB meter registered 130 dB when placed 2.2 m in front of a loudspeaker on the stage. a. What was the power output of the speaker, assuming uniform spherical spreading of the sound and neglecting absorption in the air? b. How far away would the sound level be a somewhat reasonable 95 dB ? answer with units