针对混响环境非自由声场中声源测量的问题,本文以消声水池和混响水槽为实验环境,以换能器辐射的声场为研究对象,以水听器阵列为测量前端,进行了混响环境非自由声场中声源对象的测量、分析和重构的实验研究。通过单层水听器阵列对非自由声场进行声压分布测量,并对测量结果作声波分离处理,将分离前后的声压分布和在消声水池中测量的声压分布进行比较,给出了声源频率为5 000 Hz和7 000 Hz时,声场重构的误差分析结果。结果表明,基于单层水听器阵列声压测量的声波分离方法,能够较精确地对混响环境中的声场进行重构。
Abstract
In order to solve the sound source measurement problem in the non-free sound field of reverberation environment, a method of sound field reconstruction was presented. In this method, we took measurement, analysis and reconstruction of the sound source. We chose the anechoic tank and reverberation tank as the experimental environment, the transducer as the simulation object, the hydrophone array as the frontend measurer. By using the single layer hydrophone array, the sound pressure distribution of non-free sound field was measured. Sound wave separation was conducted for the measurement results. The sound pressure distributions before and after the sound wave separation were respectively compared with those in the anechoic tank. At last we calculated the errors of sound field reconstruction. The sound field reconstruction errors were presented when the source frequencies were 5 000 Hz and 7 000 Hz. The results show that this sound wave separation method based on sound pressure measured by the single layer hydrophone array can reconstruct the sound field in reverberation environment accurately.
关键词
混响环境 /
单层水听器阵列 /
非自由声场 /
声波分离 /
声场重构
Key words
reverberation environment /
signal hydrophone array /
non-free sound field /
sound wave separation /
sound field reconstruction
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