水声换能器的随机噪声绝对校准

本文利用Ｐｒｏｎｙ参数模型进行水声换能器随机噪声绝对校准技术的研究。在研究Ｐｒｏｎｙ参数估计的基础上利用一定带宽的滤波器进行换能器校准的模拟实验，结果表明了利用随机噪声互相关的方法可以有效地排除水声换能器校准过程中由水域边界引起的反射干扰，突破由水域有限尺寸引起的可校准的低频限。最后进行换能器实际校准研究，表明了随机噪声校准技术是换能器低频绝对校准的一种有效方法。

Absolute Calibration of Acoustic Transducers with Pseudorandom Signals

We introduce the technique of absolute calibration of underwater acoustictransducers with Pseudorandom signals, utilizing the Prony's method of parameter estimation. The result of a simulated experiment shows that the reflections from the boundary canbe expelled by applying the Prony's method to the correlation of Pseudorandom signals,andthe low-ferquency limit of free-field calibration in confined water tank be largely reduced.The effectiveness of the technique is demonstrated in the real experiment.