半消声室

在半消声室中进行了单频和100Hz带宽的消声实验，仅利用单个次级源结构便获得较好的消声效果。

In a semi-anechoic chamber , we obtained some sound reduction experimental data for a single frequency noise ( Fig.3a ) and for a 100 Hz bandwidth noise ( Fig.3b ), using our AANC-BP control system . Fig.

在标准的半消声室，用B&K3560型噪声测量分析系统，对4110Q柴油机整机和油底壳、飞轮壳、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 .

本文介绍了两种简易半消声室环境反射修正值K3的测量计算方法。

Two Simple and convenient methods for getting K3 of simply constructed semi-anechoic room are presented in this paper .

一种是通过测量驻波管中的吸声材料的吸声系数α0来计算简易半消声室的K3；

One method is to calculate K3 by sound absorption coefficient α 0 ( which is measured by standing wave apparatus ) of sound absorption material .

在半消声室变速器NVH试验台上对某款国产变速器进行振动噪声试验，采用阶次分析的方法，识别出主要噪声源；

The NVH test of a domestic transmission is done with the semi-anechoic room transmission test bench , the transmission 's main noise source is found by the order analysis .

测量简易半消声室环境反射修正值的两种方法

Two Methods for Getting Ambient Reflection Correction Factor K_3 of Simply Constructed Semi-anechoic Room

标准声源声功率级的半消声室检测法

Method for Semi-anechoic Room Used for Measurement of Sound Power Level of Reference Sound Sources

从原理上讲，声强扫描法的精度要高于半消声室精密法。

One is semi-anechoic room precision method ( SARPM ) and the other is sound intensity scanning method ( SISM ) .

首先，采用混响室&半消声室法进行了隔声性能测试，分析得到各板件的隔声量。

Firstly , a sound insulation measurement is processed , in order to get its insulation , which based on the reverberation room-semi anechoic chamber sound insulation test method .

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 .

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 semi-anechoic chamber and a common room .

最后，搭建双层板隔声结构的有源消声系统，在半消声室和混晌室中对整个系统进行实验研究。

At last , an ANC System is built in a double plane sound insulation structure , and the control effect of the entire system is studied in an anechoic and reverberation chamber .