Diaphragm excursion calculation device and method and control method for loudspeaker

• Main Authors: LIN ZE'EN, DING WEIZHONG, HONG DIANJIU, ZHU ZHONGSHI
• Format: Patent
• Language: Chinese; English
• Published: 29.09.2017
• Subjects: DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; PUBLIC ADDRESS SYSTEMS

The invention discloses a diaphragm excursion calculation device and method and a control method for a loudspeaker. The diaphragm excursion calculation method for the loudspeaker is applied to the loudspeaker. The loudspeaker comprises a diaphragm and is driven by a voltage signal. The method comprises the following steps: (a) performing low-pass filtering on a voltage signal and a current signal which are input into the loudspeaker in order to generate a voltage signal undergoing the low-pass filtering and a current signal undergoing the low-pass filtering; (b) calculating a direct-current resistance value of the loudspeaker according to the voltage signal undergoing the low-pass filtering and the current signal undergoing the low-pass filtering; (c) calculating a vibrating rate of the diaphragm according to the voltage signal, the current signal and the direct-current resistance value; and (d) calculating a diaphragm excursion of the loudspeaker according to the vibrating rate. A real number operation is pe