Abnormal audio detection system in comprehensive pipe gallery

The invention provides an abnormal audio detection system in a utility tunnel. The abnormal audio detection system comprises a sound acquisition part, an audio converter, an audio analyzer and an alarm, the audio converter is electrically connected with the sound acquisition component and is used for converting the acquired sound into audio data; the audio analyzer is electrically connected with the audio converter and is used for preprocessing the audio data and performing spectral analysis to obtain audio categories; the alarm is electrically connected with the audio analyzer, and is used for obtaining the audio, comparing the audio with a preset abnormal audio model, judging the abnormal type, and determining whether to give an alarm or not. Compared with the prior art, the sound collector can cover a large monitoring area in a unique environment of the utility tunnel, a large number of monitoring point positions are not needed, investment is greatly saved, cost is saved, and the sound collector does not n