本文分别在半消声室和普通房间进行有源消声实验。
Active noise control experiments were performed in both a semi-anechoic chamber and an ordinary room.
详细介绍汽车整车半消声室的设计方法、建设情况和鉴定结果。
The detail of the design, construction and the appraisement of the whole vehicle semi-anechoic chamber is introduced.
在半消声室中应用这套实验装置对声源进行了定向研究，并探讨了各种误差因素与定向精度的关系。
The bearing experiment of sound source is done with the set of experiment device in semianechoic room, the relation between bearing precision and all kinds of error factor is discussed.
为验证此方案，在半消声室进行了非典型声强向量阵的定向实验，用3个扬声器模拟体积目标3个不同部位的声源。
To test this scheme, experiment was conducted in a semi-anechoic chamber, with 3 loudspeakers simulating the sound sources of the 3 separate sections of the volume target.
为了验证噪声检测系统的精度和可靠性，在半消声室和普通房间内，分别对标准声功率源和小型电机作声功率对比测量试验。
To verify the accuracy and reliability of the system, contrast tests on reference sound power source and small motor are performed respectively in a semianechoic chamber and a common room.
首先进行了车内噪声实验和NVH半消声室台架实验，利用阶次分析找到了主要的阶次，然后利用声贡献量分析最终确定了啸叫特征阶次。
The whine noise was tested in vehicle and in the NVH testbench. Through order tracking analysis and noise contribution analysis, the whine orders were found.
在标准半消声室，用B&K3560噪声测量分析系统对4110Q柴油机整机和油底壳、飞轮壳、喷油泵、摇臂罩等零部件的噪声进行了台架试验研究。
The noise of 4110Q diesel engine and its oil pan, flywheel cover, oil pump, valve chamber has been studied by the analysis system of B&K3560 in the normal Semi-anechoic chamber.
在标准半消声室，用B&K3560噪声测量分析系统对4110Q柴油机整机和油底壳、飞轮壳、喷油泵、摇臂罩等零部件的噪声进行了台架试验研究。
The noise of 4110Q diesel engine and its oil pan, flywheel cover, oil pump, valve chamber has been studied by the analysis system of B&K3560 in the normal Semi-anechoic chamber.
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