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Nonlinear port parameters for vented box modeling of loudspeakers

A speaker and inverter box technology, applied in the direction of speaker transducer fixation, sensors, sensor components, etc., can solve the problems of overly cautious speakers and lack of information

Pending Publication Date: 2020-04-21
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 performing at its supported maximum output.

Method used

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  • Nonlinear port parameters for vented box modeling of loudspeakers
  • Nonlinear port parameters for vented box modeling of loudspeakers
  • Nonlinear port parameters for vented box modeling of loudspeakers

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Embodiment Construction

[0017] As required, detailed embodiments of the present invention are disclosed herein; however, it is to be understood that the disclosed embodiments are merely exemplary of the invention that may be embodied in various and alternative forms. The figures 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 representative basis for teaching one skilled in the art to variously employ the present invention.

[0018] Electromagnetic speakers can use magnets to generate magnetic flux in an air gap. The voice coil can be placed in the air gap. The voice coil may have a cylindrically wound conductor. An audio amplifier is electrically connected to the voice coil to provide an electrical signal corresponding to a specific current to the voice coil. The electrical signal and magnetic field gene...

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Abstract

A loudspeaker parameter system for vented box driver excursion modeling may include a loudspeaker driver having a conductor, a magnet and a diaphragm. The system may further include a processor for excursion modeling configured to receive an input signal, determine a voltage level of the input signal, an enclosure having a resonant port, estimate port parameters including at least one of an acoustic resistance or acoustic mass, and apply a voltage limit based on the vented box excursion model utilizing the port parameters.

Description

technical field [0001] This paper discloses nonlinear port parameters for modeling vented enclosures of loudspeakers. Background technique [0002] Various methods and systems have been developed to protect loudspeakers with digital signal processing (DSP), including vented box loudspeakers. Various models have been developed to characterize the nonlinearity of loudspeakers. Primary sources of these nonlinearities may include force factor, stiffness, inductance, and acoustic resistance and mass. Existing loudspeaker limiters can limit peak or RMS voltage, but lack proper information, including complete thermal and drift models. These speaker limiters may be overly cautious in limiting and thereby preventing the speaker from performing at its supported maximum output. Contents of the invention [0003] A loudspeaker parameter system for modeling drift of an inverter driver may include a loudspeaker driver having a conductor, a magnet, and a diaphragm. The system may als...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/22H04R9/04H04R9/06
CPCH04R1/22H04R9/04H04R9/06H04R3/02H04R3/007H04R1/025H04R1/2823H04R7/04H04R9/025
Inventor R.H.兰伯特D.J.巴顿
Owner HARMAN INT IND INC
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