Abstract

The results of theoretical calculations and experimental studies of the characteristics of an acoustic test signal when using an acoustic enclosure of the “open-shield” type are presented. The enrichment of the test acoustic signal spectrum due to the use of the developed enclosure was up to +30 dB in the frequency range of up to 500 Hz and from +4 to +20 dB in the frequency range of 1500–5000 Hz in comparison with the loudspeaker without an enclosure. The effect of room characteristics on the acoustic signal at the measurement point was studied and a method for compensation of this influence was proposed. As a result of applying it, the nonuniformity of the amplitude–frequency response of the acoustic signal at the measurement point decreased from 7 to 1.5 dB and the slopes of its spectral characteristic were eliminated.

中文翻译：

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光纤测量系统组件声学研究的实验装置

摘要

介绍了使用“敞开式”隔音罩时的声学测试信号特性的理论计算和实验研究结果。由于使用了发达的外壳，测试声信号频谱的丰富度在最高500 Hz的频率范围内高达+30 dB，而在1500–5000 Hz的频率范围内则从+4至+20 dB不带外壳的扬声器。研究了房间特性对测量点声信号的影响，并提出了一种补偿这种影响的方法。作为应用的结果，声学信号在测量点的幅度-频率响应的不均匀性从7 dB降低到1.5 dB，并且消除了其频谱特性的斜率。