基于声强测量的近场声全息及其在水下声源声辐射分析中的应用

Nearfield acoustic holography based on intensity measurement and application in radiating analysis of underwater sound sources

基于声强测量的宽带声全息（ＢＡＨＩＭ）是一种新的有效的声场重建技术，在获得了测量面（全息面）上两个切向声强分量后，利用ＢＡＨＩＭ可以预报声源的辐射场及噪声源定位。本文给出了不同声源和参数下ＢＡＨＩＭ数值分析结果，井利用自行研制的双通道自动扫描声强测量系统进行了水下声源近场声辐射的ＢＡＨＩＭ实验，结果证实了该方法的有效性，它增强了分析和识别噪声源的能力。

Broadband acoustic holography based on intensity measurement (BAHIM) is a new andpowerful field reconstruction technique. It allows one to predict the sound radiating field from a sourceand locate sound noise sources by measuring the nearfield sound intensity distribution on a measurementplane (hologram). In this paper, numerical analysis for different sources and parameters of the hologramat sample are given. Moreover, by the automated scanning two-hydrophones sound intensity measurementsystems, the experiment is carried out and the BAHIM method is applied to sound field analysis ofsubmerged spherical sound source. The results demonstrate the effectiveness of BAHIM. As a technique,the BAHIM can greatly enhance the ability for us to analyze and discern noise sources.