Active Loudspeaker Protection Against Mechanical Overload
The generation of sufficient acoustical output by smaller loudspeaker systems requires maximum exploitation of usable working range while avoiding any mechanical or thermal overload of the transducer.For example, micro-speaker used on portable and personal audio devices require active electronic means to keep the peak displacement and temperature of the voice coil below permissible limits and to prevent a damage of the transducer.After providing an overview on existing protection schemes based on linear or nonlinear transducer models with adaptive parameter identification the paper focusses on the adjustment (tuning) of the protection system to the particular transducer.A set of relevant transducer characteristics is defined which can be measured during transducer development and end-of-line testing.The new concept is illustrated with a micro-speaker and the data exchange and communication between transducer manufacturer, software provider and system integrator are discussed.
nonlinear loudspeaker modeling smart amplifiers voice coil displacement
Wolfgang Klippel
KLIPPEL GmbH, Dresden, Germany
国内会议
第五届电声技术国际研讨会( International Symposium on ElectroAcoustic Technologies)(ISEAT 2015)
深圳
英文
92-109
2015-11-13（万方平台首次上网日期，不代表论文的发表时间）