Question: A loudspeaker on a pole is radiating 100 W of sound energy in all directions. You are walking directly toward the speaker at 0.80 m/s.

A loudspeaker on a pole is radiating 100 W of sound energy in all directions. You are walking directly toward the speaker at 0.80 m/s.
When you are 20 m away, what are

(a) The sound intensity level and

(b) The rate (dB/s) at which the sound intensity level is increasing?

Use the chain rule and the relationship log₁₀x = ln x/ln 10.

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