【作者】 刘玉财； 陈毅； 易文胜；

【Author】 LIU Yucai;CHEN Yi;YI Wensheng;Hangzhou Applied Acoustics institute;

【机构】 杭州应用声学研究所；

【摘要】 针对浅水域环境水声设备振动噪声量级评估精度较差的问题,提出采用基于声学逆频响矩阵法的声源级估计方法,该方法将多途信道传输函数表示为声源及其多阶虚源的干涉叠加,构建起了复声源强度、测量点声压及水声信道之间的关系,通过对传输函数矩阵逆处理即可较快从辐射声场测量来估计声源强度。介绍了该方法的基本原理,并分析了声源级估计误差的影响因素,包括声信道估计误差、声压测量误差以及传递矩阵的条件。给出了数值仿真分析结果,分析表明所提方法估计水声换能器发射声源级是可行的,并具有良好的性能。更多还原

【Abstract】 A sound source level estimation method based on the acoustic inverse frequency response function(IFRF) is proposed to solve the problem of poor accuracy of the assessment of the vibration and noise level of underwater acoustic equipment in shallow waters. This method represents the multi-channel transmission function as the interference superposition of the sound source and its multi order virtual source. The transfer matrix builds the relationship between the complex source strengths, the complex pressures at measurement points and the acoustic channel. The source strengths can be estimated accurately from the radiated acoustic field measurement based on the inversion of transfer matrix. The basic principle of the IFRF method is introduced, and the influencing factors of source strength estimation errors are analyzed, including the underwater acoustic channel estimation errors, sound pressure measurement errors, and the conditions of the transfer matrix. The results of numerical simulation analysis are presented, which indicates that the proposed method is feasible and has good performance in estimating the sound source level of underwater acoustic transducer.更多还原