Patent ID: 11871203
Assignee: ELETTROMEDIA S.P.A.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A method of controlling a loudspeaker having an electromechanical force transducer and a diaphragm comprising the steps of:
providing a non-linear model (FT) configured to apply one or more desired conditions to a loudspeaker input digital audio signal;
providing an inverse non-linear electromechanical (FI) model of the force transducer configured to receive a signal processed by the non-linear model and to compensate, preferably linearize, at least one mechanical and/or electrical and/or electromechanical non-linearity of a transducer coil; and
converting the digital output signal of the electromechanical model into an analog signal for the force transducer, wherein, the desired condition is at least one of the desired frequency response conditions and/or a force factor dependent on the desired excursion and/or a mechanical stiffness dependent on the desired excursion and/or an inductance depending on the desired excursion of the force transducer;
wherein the output signal comprises a voltage signal representative of the displacement of the transducer to emit sounds by the action of the transducer on the diaphragm and at least said non-linear electromechanical inverse model is a digital wave filter (WDF) model to provide a directly computable function of the input signal for the transducer and, wherein the aforementioned non-linear electromechanical model includes parameters of the speaker belonging to an electrical domain, and to a mechanical domain, the electrical and mechanical domain being coupled through a first conversion factor based on a first current-controlled voltage generator and a second current-controlled voltage generator to relate an electromagnetic force applied to said moving mass with a counter-electromotive force generated in the coil by the movement of the mass.