APPLICATION OF DEVICES FOR RELAYING SIGNALS DURING HYDROACOUSTIC MEASUREMENTS

The use of repeaters in hydroacoustic experiments makes it possible to increase the accuracy of measured parameters such as the speed of an object, its scattering force, and propagation losses. The paper discusses the use of a frequency-shifted repeater when emitting hydroacoustic signals in continuous and pulsed modes. A technique has been tested for determining the speed of a moving object using a repeater based on a compact 3D LF — a low-frequency hydroacoustic transducer of the longitudinal-bending type with a complex shape of the radiating shell. It is shown that the proposed technique provides modulation of the backlight signal in real time as well as simulation of signals reflected by large moving objects. The results of the experiments are consistent with preliminary calculations and confirm, within the framework of the proposed methodology, the possibility of using signals (including continuous signals) of various shapes for the acoustic diagnosis of anomalies in the marine environment.