There is a project based on fft and cross-correlation for voice recognition, may be any sound up to 2 kHz bandwidth : http://coolarduino.wordpress.com/2012/10/18/speech-voice-recognition-remix/
There is a project based on fft and cross-correlation for voice recognition, may be any sound up to 2 kHz bandwidth : http://coolarduino.wordpress.com/2012/10/18/speech-voice-recognition-remix/