عنوان مقاله [English]
In order to estimate the distance between the transmitter and receiver placement of transmitting audio (at a frequency of 50 kHz) in a stratified environment (three layers of different densities) used in laboratory conditions. Experiments in a glass tank with a length of 300 cm and a width of 50 cm and depth of 100 cm is conducted. is water, we recorded the noises contained in data Batrvs removed using a filter. Receivers, sound passing through each layer due to the speed of sound changes due to the density difference between layers with a time lag receives. By comparing this Akhtlafzmany there when passing through an environment resulting from changes in the speed of sound layering, and a homogeneous environment (tank full of water) and changes in peak-to-peak signal, received signal power and strength to help in moments of sound transmission techniques. compressed pulse we calculate the distance between the sensors.