  The primary contribution of this paper is to characterize the propagation of
acoustic signal carrying information through any medium and the interaction of
the travelling acoustic signal with the surrounding medium. We will use the
concept of damped harmonic oscillator to model the medium and Milne's
oscillator technique to map the interaction of the acoustic signal with the
medium. The acoustic signal itself will be modelled using the one-way wave
equation formulated in terms of acoustic pressure and velocity of acoustic
waves through the medium. Using the above-mentioned concepts, we calculated the
effective signal strength, phase shift and time period of the communicated
signal. Numerical results are generated to present the evolution of signal
strength and received signal envelope in underwater environment.
