Time frequency analysis based loudspeaker noise online detecting instrument

The invention relates to a different sound on line detector for speaker based on time-frequency analysis. The invention is mainly characterized in that a signal generator is connected with a speaker through the wires, wherein the speaker is arranged in the heat transmission hole at the top of a noise elimination box, the bottom of the noise elimination box is provided with a microphone, the microphone is corresponding to the speaker, the microphone is connected with the input end of a collection card through wires, and is passed through A/D conversion, wave filter, time-frequency conversion, fault classification and identification, then outputs the identification results. The invention has a simple whole structure, the installation and manufacturing costs are lower, by adopting the method of time-frequency analysis, the speaker realizes rapidly and automatically intelligently detection in the production line, and the detection is precise, the detection efficiency is higher, the invention effectively overcomes