Fault detection of direct radiator loudspeaker systems by phase characterisation

Today, the audio systems become more performant and powerful using direct radiator loudspeakers realized in advanced technologies to achieve a high fidelity of the sound in a smaller box. Due to the increasing of the power and miniaturization, the system radiator became exposed to degradation. This can be prevented by integrating a fault detection system that monitories continuously the system radiator state. In this paper is proposed an experimental system to detect the degradation of direct radiator loudspeaker based on information collected at the input of it, using measurement of the consumed current and of the applied voltage.