Camouflaged and hidden underwater sound source device and method using whale sound and simulating sounding characteristics of whale

Abstract

The invention belongs to the field of signal detection and aims to improve the camouflaging and hiding capabilities of a sound source. The technical scheme adopted by the invention is that a camouflaged and hidden underwater sound source device using whale sound and simulating sounding characteristics of the whale is characterized by comprising a command control interface, a whale sound generator, a power amplifier and a sounding sensor, wherein the whale sound generator consists of a control module and a storage module; a whale sound database is stored in the storage module and contains sounding rule data of whales of different kinds under the conditions of different sea areas, different seasons and different hydrological environments; the control module is used for controlling the storage module to output the whale sound matched with corresponding sea area, season, hydrology and other environments to the power amplifier according to a command from the command control interface; the sounding sensor is used for receiving a whale sound signal outputted by the power amplifier and transmitting the whale sound signal. The camouflaged and hidden underwater sound source device disclosed by the invention is mainly applied to signal detection.

Description

technical field [0001] The invention belongs to the field of signal detection; specifically, it relates to a device and method for camouflaging and concealing an underwater sound source by utilizing the sound of a whale and imitating its sounding characteristics. technical background [0002] The acoustic waveforms emitted by conventional sound source systems mainly include single pulse waveforms, pulse train waveforms, chirp pulse waveforms, frequency coded waveforms, etc. These signals have some common characteristics: (1) The signal envelope is a pulse rectangle, (2) The modulation signal in the envelope is a single-frequency sine wave or a sine wave with a linear frequency change. (3) The time-frequency characteristics of these signals are simple, and they are easy to distinguish, identify and classify; the above three points lead to the fact that conventional sound source signals are easy to be detected by the enemy The system detects, identifies, and tracks, and become...

AI Technical Summary

Problems solved by technology

Whale sound signals are composed of different types of "clicks" (see literature [1]), these whale sounds are usually divided into 4 categories, namely: "usual clicks", "creaks", "codas", and "slow clicks" , and these whale sounds have the following characteristics: (1) the signal envelope changes randomly without fixed rules, (2) the modulation signal in the envelope is a complex broadband signal, (3) the whale sound signal is a non-stationary signal, (4 ) The time-frequency characteristics of the whale sound signal are complex; the above four points lead to the fact that the whale sound signal is not easy to be detected on the one hand, and on the other hand, even if the whale sound signal is detected, the sound recognition system will regard it as the sound of the whale rather than the active one. The sound of the sonar sound source (see literature [2-3]) and filter out

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