AES扬声器实用规范中承受功率试验用粉红噪声的规定和数字实现

提出了用数字方法产生AES扬声器实用规范中承受功率试验用粉红噪声的方法以及所需的相关技术,包括数字白噪声序列的产生、粉红噪声滤波器的优化、信号带宽与带外衰减的控制、信号峰值因数的控制等。提出了两种模拟二极管正向导通输入输出特性的数学函数,进行数字序列峰值因数的控制。利用这些技术进行了实验,产生了六组不同带宽的AES标准粉红噪声信号。实验结果验证了该方法正确可行,可直接应用到有关AES标准的数字化测量之中。

Generation of pink noise defined in the audio engineering society standard

Digital techniques are proposed used to develop pink noise for power handling test of AES standard,including development of white noise sequence,optimization of pink noise filter,bandwidth and attenuation control,and peak factor control.Two input-output soft-clip functions that mimic the diode full-wave soft clipping have been designed to control the peak factor of digital sequences.Several AES standard pink noises of different bandwidths are generated.The results show that the method is feasible,and it can easily be applied in the digital testing of AES standard.