Abstract: As the rub&buzz of loudspeaker is one aspect of audio quality, this paper suggests a new method called PDM to detect the loudspeaker rub&buzz based on the PEAQ algorithm (Perceptual Evaluation of Audio Quality). The differences between the test signals and the reference signal, which are considered by human auditory characteristics, are calculated frame by frame to distinguish tested speakers. The human auditory model contains outer-middle ear frequency weighting, auditory filter groping, internal noise and masking effects in time and frequency domains. Compared with the existing HOD (high order harmonic detection) method, the results of laboratory experiments proved the practicability of the PDM method.