Abstract
The present invention relates to a diagnostic system for loudspeakers and forming the same. When a loudspeaker works in the large signal domain, many nonlinearities of the loudspeaker may appear. Those nonlinearities cause distortions which may destroy the sound quality. The diagnostic system of the present invention utilizes neutral fuzzy system to form an expert system for diagnosing the loudspeaker. The system of the present invention can diagnose defect sources according to different distortion types.