声强探头到试件表面距离对隔声测量值的影响

摘要

在混响室+半消声室组成的隔声室内测量构件隔声量时,当其它条件不变,仅改变声强探头到试件表面距离,研究声强探头到试件表面距离对声强法隔声测量值的影响.采用经验公式进行理论计算,并利用声学仿真软件行声学仿真分析计算,将计算结果与测量结果进行对比分析,验证了在隔声室内进行的声强法隔声测量的准确性,并总结了声强探头到试件表面距离对声强法隔声测量值的影响规律.%The sound insulation performance of components was measured in a chamber using sound intensity method. In the test, the distance between the probe and the specimen surface was changed only with other conditions remaining unchanged. The influence of the distance between the probe and the specimen surface on the measurement results of airborne sound insulation was studied. The mathematical calculation by empirical formula and the acoustic simulation by means of acoustic simulation software were done and their results were compared and analyzed. Finally, the accuracy of sound insulation test was verified by comparing the measurement results with the computation results. And the influence law of the distance between the probe and the specimen surface on the measurement results of sound insulation test was summarized.