分别使用goertzel和fft对dtmf语音信号进行识别-using goertzel algorithm and fft to build a detector separately

运用FFT技术来综合和分析电话拨号的过程，matlab来分解了这一过程，希望能提供帮助- TOUCHTONE Use FFT to synthesize and analyze telephone dialing The dual tone multi-frequency (DTMF) standard specifies that the tone generated by a button on a telephone key pad is the sum of two sin