摘要
本文讨论了相距很近的两个点声源的声强分布,发现位于声源之上的平面法向声强在某些区域为负向声强。对纸盆扬声器声场的实测结果也显示出与理论计算相符的负向声强。本文的理论计算及实际测量结果对负向声强的传统解释增加了新的内容。
The sound intensity distribution in the sound field of two closely spaced simple harmonic point sound sources have been studied in this paper. It was found that the normal component of the sound intensity over a plane surface above the source can be negative in certain areas. An experiment was conducted to map the distribution of the mormal component of the sound intensity over a surface above a loudspeaker, and it was also found that there are some surface areas where the normal sound intensity component is negative. It can be concluded that the negative sound intensity measured in a real situation does not necessary indicate extraneous noise sources outside the measurement surface, or sound absorption inside the measrement surface, or measurement mistakes.
出处
《声学学报》
EI
CSCD
北大核心
1990年第5期364-372,共9页
Acta Acustica
