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Microphone calibration method, device and mobile terminal

A calibration method and a calibration device technology, which are applied to electrical components, signal processing, etc., can solve problems such as poor consistency of sound loudness at the sending end, reduced user experience, and louder sound

Inactive Publication Date: 2016-05-04
NUBIA TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of processing accuracy, the sensitivity of the microphones produced by typical microphone manufacturers is in the range of ±3dB, which also leads to some differences in the signal strength captured by the microphones, which directly affects the consistency of the sound loudness performance of the sending end of a single mobile phone The performance is very poor, and the displayed scenarios include user feedback that the voice heard by the other party is too loud or too soft, which leads to a decrease in user experience

Method used

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  • Microphone calibration method, device and mobile terminal
  • Microphone calibration method, device and mobile terminal
  • Microphone calibration method, device and mobile terminal

Examples

Experimental program
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Effect test

Embodiment 1

[0046] see figure 2 , a flowchart of a microphone calibration method is given, and the microphone is applied to a mobile terminal, including steps:

[0047] S11. Receive a sound signal collected by a first microphone, acquire a characteristic value of the first microphone as a first characteristic value, and use the first characteristic value as a standard value for calibration.

[0048] Specifically, the mobile terminals in this embodiment include but are not limited to mobile phones, smart phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Tablet Computers), PMPs (Portable Multimedia Players), etc. and other mobile terminals. Due to the limitation of the processing accuracy of the microphone, the sensitivity of the microphone produced by the microphone manufacturer has an output of 80%-90% within the qualified index in the range of ±3dB. In this embodiment, the first microphone is a microphone that satisfies the qualified in...

Embodiment 2

[0075] see image 3 , a microphone sensitivity calibration device provided in an embodiment of the present invention, comprising: a receiving module 11, a processing module 12, a gain compensation module 13, and a storage module 14, wherein,

[0076] The receiving module 11 is configured to receive the sound signal collected by the microphone.

[0077] Specifically, the mobile terminals in this embodiment include but are not limited to mobile phones, smart phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Tablet Computers), PMPs (Portable Multimedia Players), etc. and other mobile terminals. The microphone receives the sound from the artificial mouth of the audio test equipment, and tests the frequency response curve of the microphone of the mobile terminal (for example, a mobile phone). This test method uses the mobile phone to preset the APP of the automatic production line. The APP can directly call the audio circuit of the...

Embodiment 3

[0091] see Figure 4 , is a schematic diagram of a physical structure of an audio processing system provided by an embodiment of the present invention. Including: an audio codec 1000, a processor 1100, the audio codec (Codec) is used to process audio information, input, output and volume control and other audio-related functions, the connection between the audio codec and the processor (CPU) It communicates with the digital audio interface DAI (IIS) through the I2C bus. The I2C bus is used by the CPU to read and write the Codec register data through it. The DAI (IIS) is used to realize the communication of audio data between the CPU and the Codec.

[0092] Wherein, the audio codec 1000 also includes: Mixer1001, ADC1002, DSP1003, DAC1004. see Figure 5 ,

[0093]The input of audio codec includes microphone (MIC), telephone signal (PhoneIn), output includes earphone (HP, HeadPhone), speaker (Spk, Speaker), telephone signal (PhoneOut), among them,

[0094] Mixer1001, a mixer,...

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Abstract

The invention discloses a microphone calibration method, device and a mobile terminal. The microphone is applied to the mobile terminal. The microphone calibration method is characterized by comprising the following steps: receiving an acoustical signal acquired by a first microphone, acquiring a characteristic value of the first microphone as a first characteristic value, and taking the first characteristic value as a calibration standard value; receiving an acoustical signal acquired by a second microphone, and acquiring a characteristic value of the second microphone as a second characteristic value; and compensating a second microphone gain according to a difference value of the first characteristic value and the second characteristic value, and obtaining a calibration gain. The microphone calibration method, device and the mobile terminal provided by the invention have the following beneficial effect that the problem that the sound loudness of the microphone does not have the consistency due to production or assembly and other reasons can be solved.

Description

technical field [0001] The present invention relates to the technical field of mobile terminals, and more specifically, to a microphone calibration method, device and mobile terminal. Background technique [0002] The sensitivity of the microphone (MIC) refers to the voltage signal amplitude output by the microphone corresponding to a given sound pressure intensity (1 Pascal), and the typical sensitivity requirement is 8 mV / Pascal. The sensitivity of the microphone is related to many factors such as the plate gap, bias voltage, and sensitive membrane tension in the acoustic-electric conversion component. With the continuous reduction in the production cost of mobile terminals (for example, mobile phones) and the continuous increase in shipments, there are also certain differences in the consistency of microphone production or assembly between mobile phones. In order to obtain microphone products with relatively consistent sensitivity , manufacturers need to strictly control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R29/00
CPCH04R29/00H04R29/004H04R2430/20
Inventor 孙丽
Owner NUBIA TECHNOLOGY CO LTD
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