Due to a point isotropic sonic source, loudness at a point is L = 40 dB. If density of air is `r = 15//11 kg m^(-3) ` and velocity of sound in air, u `= 330 ms^(-1)` , calculate.
(i) pressure oscillation amplitude at the point of observation, and
(ii) ratio oscillation amplitude of particle of medium to wavelength of sonic waves.