Physics, 12.08.2020 08:01 cupcake20019peehui

At a rock concert, a dB meter registered 131 dB when placed 2.6 m in front of a loudspeaker on the stage. The intensity of the reference level required to determine the sound level is 1.0×10−12W/m2. 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 86 dB?

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At a rock concert, a dB meter registered 131 dB when placed 2.6 m in front of a loudspeaker on the s...