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amplifier controller

A loudspeaker and controller technology, which is applied in the direction of the loudspeaker system, sensor, transducer circuit, etc., can solve the problems of protecting the diaphragm displacement of the loudspeaker, predicting the diaphragm inaccurately, and not being too conservative

Active Publication Date: 2018-06-29
GOODIX TECH HK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for input signals that result in large diaphragm displacements, this linear model is not valid due to the nonlinear behavior of the loudspeaker, and it is inaccurate to predict the displacement of the diaphragm based on the linear transfer function
Therefore, it is difficult to mechanically protect the loudspeaker under relatively large amplitude signal conditions so that its diaphragm displacement is not too conservative while still being within the limits specified by the manufacturer

Method used

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Embodiment Construction

[0033] The present invention relates to a loudspeaker controller which can be implemented so as to protect the loudspeaker, thereby prolonging the life of the loudspeaker and extending its lifetime by processing the acoustic signal used to drive the loudspeaker. maintain higher quality audio output.

[0034] figure 1 An embodiment of a loudspeaker controller 1 is shown for controlling the output of a loudspeaker 2 . The loudspeaker 2 is driven by an input signal 3 , which is driven by an amplifier 4 . The controller 1 comprises a mixing element 5 arranged upstream of the amplifier 4 for introducing the measurement signal generated by the measurement signal generator 6 into the input signal. The controller 1 includes a sensor 7 configured to measure the voltage across the voice coil of the loudspeaker 2 and the current flowing through the voice coil of the loudspeaker 2 . The impedance calculation element 8 is configured to receive the measured voltage and current and use th...

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Abstract

A loudspeaker controller (1) for controlling a loudspeaker (2), configured to determine a time-varying impedance of the loudspeaker (2) based on the loudspeaker voltage and measurements of the loudspeaker current information; and provide control of the loudspeaker (2) based on the time-varying impedance information.

Description

technical field [0001] The invention relates to a method of controlling the output of a loudspeaker. The invention also relates to a loudspeaker controller. Furthermore, the invention relates to a method and a controller for mechanical loudspeaker protection. Background technique [0002] A loudspeaker is a device with a voice coil that moves a diaphragm and converts an electrical signal into an acoustic signal. For small electrical signals, the diaphragm displacement is small, and an accurate linear transfer function can be defined between the input voltage signal and the diaphragm displacement function. However, for input signals that result in large diaphragm displacements, this linear model is not valid due to the nonlinear behavior of the microphone, and it is inaccurate to predict the displacement of the diaphragm based on the linear transfer function. Therefore, it is difficult to mechanically protect the loudspeaker under relatively large amplitude signal conditio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R27/00
CPCH04R3/002H04R3/007H04R29/001H04R29/003H04R1/00H04R3/00
Inventor 泰姆金·高塔马阿兰·奥辛内德卢森·卢德格斯·阿尔伯特·亨德里克斯·多帕
Owner GOODIX TECH HK CO LTD