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声波在浅海中传播时,声压振幅随传播距离呈一定规律衰减。对衰减后的声信号进行处理时,往往需要利用时变增益放大器对扩散损失进行补偿。本文基于数字电位器和基本运放电路对球面扩散声波进行了增益补偿,对柱面扩散声波以及介于柱面扩散和球面扩散两者之间的补偿模型进行了理论上的探索,最后提出一种对未知传播衰减规律的声波扩散损失的补偿办法,旨在压缩信号的动态范围以满足A/D转换的要求。
Acoustic wave propagation in the shallow sea, the sound pressure amplitude with the propagation distance showed a certain attenuation. When processing the attenuated acoustic signal, it is often necessary to compensate for the diffusion loss using a time-varying gain amplifier. In this paper, based on the digital potentiometer and the basic op amp circuit spherical diffusion sounding gain compensation, the cylindrical diffusion sound waves and between the cylindrical diffusion and spherical diffusion between the two models for a theoretical exploration, and finally proposed a The compensation for acoustic diffusion losses of unknown propagation attenuation is designed to compress the dynamic range of the signal to meet the A / D conversion requirements.