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MarineBio
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Homework Statement
A bird watcher is hoping to add a particular song bird to the list of species she has seen. If a person, only 2.11 m from the bird, hears the sound with an intensity of 2.5 x 10^-6 W/m2, how far could the bird watcher be from the bird and still hear it? Assume no reflections or absorption of the bird's sound and that the faintest sound that can be heard has an intensity of 10^-12 W/m2.
Homework Equations
Speed of sound: 343 m/s
The Attempt at a Solution
Ok so I've determined that 2.5 x 10^-6 W/m^2 is 63.979 dB
and...
10^-12 W/m^2 is 10 dB
Now the problem is, I don't know if dB is even relevant to solving this equation, and what is worse: I don't even know what kind of equation to use in order to approach this problem :(