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Systems and methods for modeling loudspeaker thermal behavior

A loudspeaker and behavioral technology, applied in the direction of sensors, sensor protection circuits, sensor circuit damping, etc., can solve problems such as lack of appropriate information, overly cautious speakers, etc.

Active Publication Date: 2022-01-04
HARMAN INT IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing loudspeaker limiters can limit peak or RMS voltage, but lack proper information, including full thermal and drift models
These speaker limiters may be overly cautious in limiting and thereby preventing the speaker from operating at the maximum output it is capable of

Method used

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  • Systems and methods for modeling loudspeaker thermal behavior
  • Systems and methods for modeling loudspeaker thermal behavior
  • Systems and methods for modeling loudspeaker thermal behavior

Examples

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Embodiment Construction

[0029] Required, detailed embodiments disclosed herein of the present invention; however, it should be understood that the disclosed embodiments are merely exemplary of the invention, the present invention may be embodied in various and alternative forms. Drawings are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a technique for teaching one skilled in the art to variously employ the present invention a representative basis.

[0030] Magnetic speaker magnets can be used to generate a magnetic flux in the air gap. The voice coil may be placed in the air gap. It may have a cylindrical coil conductor wound. The voice coil is electrically connected to the audio amplifier to provide a corresponding electrical signal to a certain current to the voice coil. The electrical and magnetic field generate...

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Abstract

The present invention relates to constrained nonlinear parameter estimation for robust nonlinear loudspeaker modeling, which provides a thermal model system for estimating the voice coil temperature of a loudspeaker with frequency dependent parameters to model the thermal behavior of said loudspeaker, so The thermal model system may include: a loudspeaker having a voice coil and a magnet; and a thermal model configured to have a plurality of frequency-dependent thermal circuits including the voice coil and the magnet, the plurality of frequency-dependent A thermal circuit determines a voice coil temperature that is used to limit input to the speaker to prevent thermal overloading of the speaker.

Description

Technical field [0001] Loudspeaker systems disclosed herein for real-time constraints and the state variables having a linear compensation prediction. Background technique [0002] Various methods have been developed and systems using digital signal processing (DSP) to protect the speaker. Various models have been developed to characterize the nonlinear speaker. The main source of nonlinear force factor B l (X), stiffness K ms (X) and the inductance L e (x). Conventional loudspeaker limiter may limit the peak or RMS voltage, but the lack of appropriate information, including full thermal model and drift model. These speakers limiters may be too cautious to prevent restrictions and speaker at its maximum output operation can be achieved. Inventive content [0003] Thermal model of a system having a frequency-dependent parameters modeling the thermal behavior of the loudspeaker voice coil temperature estimation speaker may include: a speaker having a magnet and a voice coil; and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R9/02H04R9/06H04R29/00
CPCH04R9/022H04R9/06H04R29/001H04R3/002H04R29/003H04R2430/01H04R3/007H04R9/025
Inventor D.J.巴顿R.H.兰伯特
Owner HARMAN INT IND INC
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