摘要
介绍脉冲声源、最大长度序列信号和扫频信号等各种声学脉冲响应测量的信号,以及声学参数测量所需的信噪比,指出12面体扬声器系统是建筑声学和室内声学测量用的主要声源。通过实验验证,着重讨论采用扫频信号测量时,扫频方式、平均次数以及信号长度对脉冲响应的信噪比的影响。
It is introduced that all kinds of signals in the impulse response measurement,such as the impulsive signals,the Maximum-length-sequence signals and the sweep signals,and the signal-noise ratio of some acoustics parameters is presented.It is pointed out the development trend of the sound source is the dodecahedron loudspeakers system.At last by the experiment validating,the signal-noise-ratio of the sweep signals are emphasized,including the sweep method,the number of average and the length of signal.
出处
《演艺科技》
2011年第4期17-20,共4页
Entertainment Technology
关键词
脉冲响应
扫频信号
信噪比
12面体扬声器系统
impulse responses
sweep signal
signal-noise ratio
dodecahedron loudspeakers system
