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Microphone device

A microphone and capacitor technology, applied in transducer circuits, speech analysis, instruments, etc., to improve noise and overall sound quality

Active Publication Date: 2015-07-15
SHANGHAI PATEO ELECTRONIC EQUIPMENT MANUFACTURING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a microphone device to improve the problem that the call receiver can hear relatively loud noise when the microphone is used

Method used

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Experimental program
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Embodiment approach

[0011] refer to figure 1 As shown, an embodiment of the microphone device of the present invention comprises:

[0012] The input circuit 100 is configured to receive a microphone audio input signal, and transmit the microphone audio input signal to a filter after performing voltage gain processing on the microphone audio input signal;

[0013] The low-pass filter 200 filters the audio signal transmitted by the input circuit 100 to filter out high-frequency noise in the signal;

[0014] The echo cancellation circuit 300 performs echo cancellation processing on the audio signal filtered by the filter;

[0015] The output circuit 400 outputs the audio signal processed by echo cancellation.

[0016] In the above-mentioned microphone device, the input circuit 100 , the echo cancellation circuit 300 and the output circuit 400 can all adopt the design of corresponding functional circuits of the known microphone device. For example, the input circuit 100 may adopt an existing diffe...

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Abstract

The invention discloses a microphone device, which comprises an input circuit, a low pass filter connected to the output of the input circuit, an echo elimination circuit connected to the output of the low pass filter, and an output circuit connected to the output of the echo elimination circuit. According to the microphone device, firstly a differentially input audio signal is filtered for eliminating a high-frequency noise in the audio signal before echo is eliminated, the noise included in the audio signal eliminated for the echo is improved, thus the integral acoustic fidelity of the microphone device is improved.

Description

technical field [0001] The invention relates to the field of audio processing design, in particular to a microphone device for improving the sound quality of the microphone. Background technique [0002] At present, echoes are often found in the use of microphones. The echo is caused by the acoustic loop between the speaker and the microphone. Specifically, the sound signal from the far end reaches the near end through the communication connection, and is emitted through the speaker at the near end. The sound signal emitted by the speaker is collected by the microphone after passing through the acoustic loop between the speaker and the microphone. Then, the sound signal collected by the microphone is transmitted back to the remote end through the communication link. At this time, the far-end speaker can hear his own echo, that is, the far-end echo. The echo can seriously affect the call quality. [0003] In order to solve the above-mentioned echo problem, various echo c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00G10L21/0208
Inventor 时红仁唐正虎谢小毛张家玉
Owner SHANGHAI PATEO ELECTRONIC EQUIPMENT MANUFACTURING CO LTD