A bir is singing on a tree and a man is ...

A bir is singing on a tree and a man is hearing at a distance `r` from the bird. Calculate the displacement of the man towards the bird so that the loudness heard by man increases by `20dB`. [Assume that the motion of man is along the joining the bird and the man].

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A bir is singing on a tree and a man is hearing at a distance `r` from the bird. Calculate the displacement of the man towards the bird so that the loudness heard by man increases by `20dB`. [Assume that the motion of man is along the joining the bird and the man].

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