System for predicting the behavior of a transducer
AssigneeHarman Becker Automotive Systems GmbH
InventorGerhard Pfaffinger
Life of this patent
Estimating the term…
Abstract
A system for compensating and driving a loudspeaker includes an open loop loudspeaker controller that receives and processes an audio input signal and provides an audio output signal. A dynamic model of the loudspeaker receives the audio output signal, and models the behavior of the loudspeaker and provides predictive loudspeaker behavior data indicative thereof. The open loop loudspeaker controller receives the predictive loudspeaker behavior data and the audio input signal, and provides the audio output signal as a function of the audio input signal and the predictive loudspeaker behavior data.
Claims16
A system for compensating for unwanted behavior of a transducer having a magnet system with an air gap, and a voice coil movably arranged in the air gap and supplied with an electrical input voltage, the system comprising:
- a transducer modeling unit for calculating the mechanical, electrical, acoustical, and/or thermal behavior of the transducer by solving a differential equation system in the discrete time domain for an upcoming discrete time sample, where the differential equation system in the discrete time domain describing the motion of the voice coil dependent on the input voltage and certain parameters dependant on the transducer;
- and
- a signal processing unit that receives control signals from the transducer modeling unit and compensates for a difference between a behavior calculated by the modeling unit and a predetermined behavior.
Dependencies are inferred from the claim text.