The possibility of passive acoustic monitoring of a Scuba Diver

The problem of controlling the state and location of scuba divers is of importance. This work consider the possibility to use for this purpose a low-frequency noise of a scuba diver. The noise of a scuba diver under a dry swimming suite near the trachea and in the water at a distance of 50 m was recorded.It wa shown that both sygnals are characterized by the presence of quasi-periodic components induced by the amplitude modulation of wide-band breathing noises by the brething rhythms of a scuba diver. The quasi-periodic componentss distinguished can be used to evaluate the physiological parameters of the state of a scuba diver and to establish his location.