device for controlling speakers

Abstract

The invention relates to a device for controlling a loudspeaker (14) in a loudspeaker housing, comprising: for an audio signal (S audio_ref ) of the input; for providing the output of the excitation signal from the loudspeaker; for based on the audio signal (S audio_ref ) means (26, 36, 38, 70, 80, 90) for computing an excitation signal for the loudspeaker (14) at each instant. In the means (26, 36, 38, 70, 80, 90) for computing an excitation signal, the device comprises a audio_ref ) and the structure of the shell to calculate the expected dynamic value of the speaker diaphragm (A ref ) device (24, 25), which is used to calculate the expected dynamic value (A ref ) means (25) are adapted to apply different corrections of the same body, and the structural dynamics of the shell (x o , v o ) into account, and the means (26, 36, 38, 70, 80, 90) for calculating the excitation signal are adapted based on the desired dynamic value of the loudspeaker diaphragm (A ref ) to calculate the excitation signal.

Description

technical field [0001] The invention relates to a device for controlling a loudspeaker in a housing, the device comprising: [0002] - input for the audio signal to be reproduced; [0003] - an output terminal for providing an excitation signal from a loudspeaker; [0004] - Means for calculating an excitation signal of the loudspeaker at each instant based on the audio signal. Background technique [0005] Loudspeakers are electromagnetic devices that convert electrical signals into acoustic signals. Loudspeakers introduce non-linear distortions that can greatly affect the resulting acoustic signal. [0006] Many schemes have been proposed to control the loudspeaker so that distortions in the behavior of the loudspeaker can be removed by appropriate commands. [0007] In order to achieve an enslavement enabling the linearization of the operation of the loudspeaker, a first type of solution uses a mechanical sensor, usually a microphone, to achieve an enslavement enablin...

AI Technical Summary

Problems solved by technology

The main disadvantages of this technology are: the mechanical volume of the equipment is large and not standardized, and the high cost

[0011] However these solutions suffer from the following drawbacks: they do not take into account a set of nonlinearities in the loudspeaker, and the installation of these systems is relatively complex and does not provide complete freedom of choice for the modified behavior obtained from equivalent loudspeakers

[0014] As in the previous document, the command implements a correction calculated at each instant and added to the input signal, although in document US8023668 the correction does not implement a closed feedback loop

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