一种声场空间特性测量系统的性能研究  

Research on performance of a spatial sound field measurement system

作　　者：赵跃英[1] 盛胜我[1] 赵松龄[1] 

机构地区：[1]同济大学声学所,上海200092

出　　处：《声学技术》2008年第1期91-95,共5页Technical Acoustics

基　　金：国家自然科学基金(10574100)

摘　　要：室内声学测量中,在声源重复发射声信号的同时,将单个无指向性传声器缓慢而匀速地转动,其测量结果等效于以转盘转轴为中心的圆形传声器阵列,相应的测量系统简称为RRS。通过消声室测量,着重分析此测量系统在方向脉冲响应测量中的性能及主要影响因素。结果表明,在满足传声器旋转半径大于1/4信号波长的条件下,系统可具有令人满意的方向分辨能力。The measurement system （called associated with a slowly rotating microphone RRS） is composed of a repeatedly inspirited sound source and the measured result is equivalent to that of using a round microphone array in room acoustics measurement. Based on the test in an anechoic room, the performance of the system in directional impulse response measurements as well as the main affecting factors are analyzed in this paper. Results show that this system has enough directional resolution while the rotating radius of microphone is greater than 1/4 wavelength of signal.

关 键 词：室内声学 方向性脉冲响应 方向分辨能力 

分 类 号：O42[理学—声学]