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Self-calibration method based on MEMS microphone and microphone

A microphone and self-calibration technology, applied in transducer circuits, electrostatic transducer microphones, sensors, etc., can solve the problems of long production time, low cost, and low efficiency of detection devices, and achieve the effect of high calibration efficiency

Pending Publication Date: 2017-05-24
ZILLTEK TECH SHANGHAI +1
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Problems solved by technology

But there is following defect in this kind mode: (1) the limitation of receiving detection device, each kind of MEMS microphone all needs a detection device matched with it, and this detection device can only be used repeatedly to the MEMS microphone of same model or same rule, The use efficiency of the detection device is low, and the cost is low; (2) each MEMS microphone must be calibrated individually, and the labor load is very large. For industrial mass production, the production time is relatively long

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  • Self-calibration method based on MEMS microphone and microphone
  • Self-calibration method based on MEMS microphone and microphone

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0033] The present invention will be further described below in conjunction with the accompanying drawings and s...

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Abstract

The invention relates to the technical field of sound signal processing, and particularly relates to a self-calibration method based on an MEMS microphone and a self-calibration MEMS microphone. The self-calibration MEMS microphone comprises: a collection unit used for collecting a sound signal of a current environment and outputting a collection signal; a recognition unit used for receiving the collection signal, and activating the MEMS microphone and locating the MEMS microphone in a test mode when the collection signal is matched with a feature signal; a control unit used for forming an adjustment signal used for adjusting the gain of the MEMS microphone according to the collection signal and a standard signal when the working mode of the MEMS microphone is a test mode; and thus the collection signal is matched with the standard signal.

Description

technical field [0001] The invention relates to the technical field of sound signal processing, in particular to a MEMS microphone-based self-calibration method and the self-calibration MEMS microphone. Background technique [0002] Existing MEMS microphones usually need to be calibrated "bare metal" during the manufacturing process. After the calibration is completed, the OTP operation is performed. The calibration process is usually: first put the MEMS microphone in a predetermined detection device, and then perform a calibration on each MEMS microphone. Perform calibration. The main purpose of calibration is to adjust the gain so that the acquisition signal of the MEMS microphone and the output signal match each other. After the calibration is completed, the programming operation is performed. But there is following defect in this kind mode: (1) the limitation of receiving detection device, each kind of MEMS microphone all needs a detection device matched with it, and thi...

Claims

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Application Information

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IPC IPC(8): H04R19/04H04R3/00
CPCH04R3/00H04R19/04H04R2430/00
Inventor 叶菁华
Owner ZILLTEK TECH SHANGHAI
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