Abstract: In recent years, there have been multiple unidentified sound incidents in the Tongling area, which have caused significant vibrations to structures and have received widespread attention from society. This article uses the earthquake event classification and recognition system SERS developed by the Non Natural Earthquake Research Laboratory of the Institute of Geophysics, China Earthquake Administration to conduct time-frequency analysis of unidentified sounds in the Tongling area. Through the SERS system, a comparative analysis of time-frequency data and waveform characteristics was conducted between the unidentified sound and natural earthquakes, mine explosions, and a chemical plant explosion event in the Tongling area. It was preliminarily determined that the unidentified sound originated from the ground or above. Based on field visits and investigations, it has been determined that there were no reports of explosions, geological disasters, or other safety production accidents in the city when the unidentified sound occurred. Therefore, it is concluded that the unidentified sound event was caused by human activities on the ground (or surface). This article uses the time-frequency analysis method in the earthquake event classification and recognition system SERS developed by the Non Natural Earthquake Research Laboratory of the Institute of Geophysics, China Earthquake Administration to analyze unidentified sounds in the Tongling area, providing reference for the study of other non natural earthquakes.