A Stereo Listening Method for Sonar Targets

Abstract

The invention discloses a sonar target stereo listening method, which mainly includes the following steps: using sonar single-beam time-domain data and its arrival azimuth as input; calling the head-related transfer function HRTF database of the listener; Query the HRTF of the binaural ears at this position from the head-related transfer function HRTF database of the listener, and use the impulse response function HRIR corresponding to the HRTF to filter the listening beam data to obtain the left and right channel listening signals respectively to form stereo signal; the stereo signal is played using stereo earbuds, the left earbud plays the left sound channel, and the right earbud plays the right sound channel. The invention can convert the sonar target listening signal from single-channel listening to stereo listening, and the listening signal carries the signal space and orientation signal, which is closer to the natural signal, more matching the auditory sensory system of the human ear, and increasing the accuracy of listening judgment .

Description

technical field [0001] The invention relates to the field of underwater acoustic signal processing, in particular to a stereo listening method for a sonar target. Background technique [0002] Sonar is currently the main equipment for naval vessels of various countries to realize underwater early warning and detection. Due to the complexity and variability of the actual ocean environment, interference and the diversity of types of targets at sea, target recognition is still a constraint on whether ship sonar can achieve efficient underwater detection. The key technology of target detection. And with the development of sonar in the direction of low frequency, broadband, large aperture and high power, the working distance of active and new low-frequency active sonar has been greatly improved, and more and more targets can be found within the working distance. The development of sonar equipment The demand for object recognition technology is becoming more and more prominent. ...

AI Technical Summary

Problems solved by technology

[0004] The accuracy of listening judgment is not only strongly related to the training quality of sonar soldiers, but also the quality of audio signals directly affects the accuracy of listening. Active sonar single-channel listening signals are not conducive to listening and judgment

In the design process of active sonar, the target listening is designed as a single-channel signal listening. After the target noise or echo signal is extracted, it is directly sent to the human ear for listening through the earplugs. The left and right channel signals are the same, and the signal heard by the human ear is an unnatural signal. Signal, that is, the signal has no directionality, and has no scattering modulation effect from the external structure of the human external auditory canal and human head

Due to long-term training, the human ear is better at perceiving and discriminating three-dimensional natural signals. The single-channel listening designed by the active sonar makes the signal training time longer, and the auditory recognizability is poor, which is not good for listening judgment.

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