说明：  此功能会产生这是一个“搁置”的设计为一个单一的IIR双二阶系数。 wierldy不够，这种过滤器的类型是不标准的Matlab的滤波器设计工具箱的一部分。这些是常用的过滤器是创建一个图形均衡器的音频信号处理。
(This function will generate the coefficients for a single IIR biquad that is a "shelving" design. Wierldy enough, this filter type is not part of the standard Matlab filter design toolbox. These filters are commonly used is audio signal processing to create a graphic equalizer. )