An Acoustic Signal Enhancer Based on Parameter Excitation

Abstract

The invention discloses an acoustic signal enhancer based on parameter excitation, which belongs to the field of artificial acoustic devices. In particular, it relates to an acoustic signal enhancer capable of manipulating and amplifying acoustic energy, specifically amplifying a weak target acoustic signal by utilizing the parametric excitation resonance effect. The acoustic signal intensifier is composed of a control circuit providing an alternating electric field and a traveling wave tube filled with a polar dielectric, including a dielectric liquid layer with controllable sound velocity. The invention controls and amplifies the target acoustic signal by combining the frequency and amplitude of the parameter excitation introduced, and ensures that the target acoustic signal of any frequency is processed by regulating the frequency of the parameter excitation. At the same time, it solves the problem that the existing acoustic signal booster has a weak ability to amplify signals in the underwater acoustic frequency band, and can improve the detection distance and target recognition accuracy of the sonar system.

Description

technical field [0001] The invention relates to an acoustic signal intensifier based on parameter excitation, belonging to the field of artificial acoustic devices. In particular, it relates to an acoustic signal intensifier capable of manipulating and amplifying acoustic energy. Background technique [0002] The electronic triode is a semiconductor device that can amplify electrical signals; thanks to the appearance of the electronic triode, large-scale integrated circuits have developed rapidly and brought great changes to human society. Electricity and sound are different forms of energy carriers, and there are many similarities in their properties and applications. In the field of acoustics, the research of acoustic signal booster will have great historical significance and practical application value. Especially for underwater target detection, underwater long-distance communication, medical ultrasound and other fields that require precise control of sound energy, it ...

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Problems solved by technology

[0004] However, this acoustic signal booster has certain requirements on the frequency of the signal wave. If this theoretical model is used to make an acoustic signal booster, it can only amplify some high-frequency signal waves; and the underwater target signal frequency is generally Low frequency acoustic signals less than 3kHz, so this acoustic signal booster is not effective at manipulating and amplifying underwater target signals

At the same time, the acoustic wave amplification gain of this acoustic signal intensifier is related to the nonlinear parameters of the nonlinear medium layer and the intensity of the pumping wave, but there is no linear relationship with the nonlinear parameters and the intensity of the pumping wave, so it is difficult to control the nonlinear parameter , The strength of the pumping wave to precisely control the amplification gain of the sound wave

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