半消声室
Semi-anechoic Chamber
技术参数：
1. 室内尺寸：长9.8米宽8.6米高3.5米。
2. 自由声场的频率范围：63Hz-20kHz。
3. 本底噪声：18dB（A）空调开启25dB（A）。
简介：
消声室不仅是声学测试的一个特殊实验室，而且是测试系统的重要组成部分，实际上它也是声学测试设备之一，其声学性能指标直接影响测试的精度。消声室的主要功能是为声学测试提供一个自由声场空间或半自由声场空间。本实验室于2016年建成投入使用，现为上海市新能源汽车振动噪声测试与控制专业技术服务平台内重要实验室。实验室主要承担整车及零部件的NVH性能测试，是教师和研究生的科研实验室，同时承担《汽车技术基础实验》、《汽车振动噪声实验》等本科教学。
开放时间：上午8：30～下午16：30，其它时间由实验中心另行安排，为保证实验正常有序进行，学生进入实验室做实验至少提前3天预约。
负责人：刘宁宁，联系电话：67791132。
1. Size [m] : 9.8*8.6*3.5
2. Cutoff frequency [Hz] : 63
3. Background noise [dBA] : ＜18dBA
Brief Introduction：
The semi-anechoic chamber is not only a special laboratory for acoustic testing, but also an important part of the test system. In fact, it is also one of the acoustic testing equipment, and its acoustic performance directly affects the accuracy of the test. The main function of the semi-anechoic chamber is to provide a semi-free sound field space for acoustic testing. The laboratory was completed and put into use in 2016. It is an important laboratory in Shanghai technical service platform for vibration noise testing and control of new energy vehicle. The laboratory is mainly responsible for the NVH performance test of the vehicle and parts. It is a scientific research laboratory for teachers and graduate students. It also undertakes undergraduate teaching such as “Automobile Technology Basic Experiment” and “Automobile Vibration and Noise Experiment”.
Opening hours: 8:30 a.m. - 16:30 p.m. other hours will be arranged by the experimental center. In order to ensure the normal and orderly manner, students enter the laboratory to make an appointment at least three days in advance.
Person in charge: Liu Ningning, Tel: 67791132.
