A point isotropic source generates sound oscillations with frequency v = 1.45 kHz. At a distance ro = 5.0 m from the source the displacement amplitude of particles of the medium is equal to a o = 50μm, and at the point A located at a distance r = 10.0 m from the source the displacement amplitude is η = 3.0 times less than ao. Find:
(a) The damping coefficient of the wave;
(b) The velocity oscillation amplitude of particles of the medium at the point A.