7 A bird is singing on a tree and a man is hearing at a

Last updated: 6/21/2023

7 A bird 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 the man increases by 20 dB 1 3 9r 10 3r 5 2 4 r 10 4r 5