A point A is located at a distance r = 1.5 m from a point isotropic source of sound of frequency = 600 Hz. The sonic power of the source is P = 0.80 W. Neglecting the damping of the waves and assuming the velocity of sound in air to be equal to v = 340 m/s, find at the point A:
(a) The pressure oscillation amplitude (∆p)m and its ratio to the air pressure;
(b) The oscillation amplitude of particles of the medium; compare it with the wavelength of sound.