Classifing audio signals to detect fault The basic idea i'm working on is automatic fault detection using audio signals captured from Motor. I have like set of sample audio signal which are recorded when there is no fault and with fault at different rpm. While hearing the audio I can clearly identify and differentiate the audio signal. But how can I differentiate that technically or programtically. Basically im from computer science background , so im having a hard time to find the method of implementation whether it can be found by audio analysis itself or if I want to implement Machine learning on audio signals  

Sample signals are here

1.3500rpm-clean
2.3500rpm-fault
You might want to look at:

Detection of Abrupt Changes:
Theory and Application1
Michele Basseville `
IRISA/CNRS
Rennes, France
Igor V. Nikiforov
Institute of Control Sciences
Moscow, Russia

with the free pdf at:

ftp://ftp.irisa.fr/local/as/mb/k11.pdf

It's a little old, but was advanced when it came out.

There are a lot of Google results for this topic.