CN209659527U - A kind of microphone system with voice and decrease of noise functions used on automobile - Google Patents
A kind of microphone system with voice and decrease of noise functions used on automobile Download PDFInfo
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- CN209659527U CN209659527U CN201920720787.7U CN201920720787U CN209659527U CN 209659527 U CN209659527 U CN 209659527U CN 201920720787 U CN201920720787 U CN 201920720787U CN 209659527 U CN209659527 U CN 209659527U
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- microphone
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Abstract
The utility model relates to microphone system technical fields, more particularly to a kind of microphone system with voice and decrease of noise functions used on automobile, high-performance microphone comprising being fixed on ceiling above four seats of automobile, the microphone of two acquisition vehicle signals is respectively and fixedly provided with inside the high-performance microphone, two microphones are connected with DSP Audio Signal Processing chip by amplifying circuit, DSP Audio Signal Processing chip connects multimedia host by amplifying circuit, the multimedia host passes through circuit connection active noise reduction assembly, the active noise reduction assembly passes through circuit connection loudspeaker.After acquiring low frequency signal and high-frequency signal respectively by two microphones fixed inside microphone, after the audio signal of acquisition is synthesized by circuit transmission to DSP Audio Signal Processing chip processing, voice signal within the scope of available flat 20HZ~10KHZ, it is respectively transmitted to multimedia host and active noise reduction assembly, while reaching the function of speech microphone and noise reduction microphone.
Description
[technical field]
The utility model relates to what is used in microphone system technical field more particularly to a kind of automobile to have voice and drop
The microphone system for function of making an uproar.
[background technique]
In the present age, automobile is no longer the walking-replacing tool of the mankind, and people more wish to bring oneself superelevation product while taking a bus
The enjoyment of matter, especially it is hoped that there will be a comfortable driving experiences of peace and quiet.More and more vehicles are a quiet easypro in order to there is passenger
Suitable environment by bus reduces interior engine noise using configuration active noise reduction function, raw using engine RPM signal as reference
At the reversed sound wave opposite with noise sound wave.It is mutually fed back as shown in Figure 1, needing to issue width in roof installation noise reduction microphone, with
Promote noise reduction effect.The acoustic signals of the main collecting vehicle intrinsic motivation of this microphone, are sent to active noise reduction module and are analyzed.
Since the acoustic signals of engine are all low frequency signal, so the low frequency performance requirement of microphone is more stringent.Needed for this function
4 microphone arrangements above four ceilings, be responsible for acquisition four seats at 20HZ~1KHZ acoustic signals, and will receive
The acoustic signals of collection are transmitted on multimedia host.While enjoying quiet comfortably environment by bus, it is desirable to liberate driver
Both hands, make to drive more intelligent, therefore almost all of vehicle all configures speech identifying function, controls vehicle by voice
Each function items.Especially present most popular speech recognition sectoring function, can distinguish difference by speech recognition algorithm
Steering position, different functions is realized according to the phonetic order of different operator seat passengers, this microphone mainly identifies the sound of people
Sound, so the performance requirement in the voice frequency range of microphone is more stringent.4 microphones needed for this function also are disposed on
Above four ceilings, the frequency for being responsible for four seat occupants of acquisition is the phonetic order signal of 1KHZ~10KHZ, and will be received
To voice signal be transmitted on active noise reduction assembly.Vehicle needs to assemble eight microphones, each function wheat in different location
Gram wind needs to be connected respectively in corresponding functional module.The harness of such scheme, vehicle connection is more, and vehicle is relatively
Weight, it is at high cost.The essential condition for influencing the frequency response performance of microphone depends on the microphone performance of microphone, speech microphone and drop
Make an uproar microphone microphone performance it is different, therefore the frequency response performance for resulting in two kinds of microphones is different.So the prior art is in automobile
8 microphones of upper installation, to reach the function of noise reduction and voice.
The utility model is to research and propose in view of the deficiencies of the prior art.
[utility model content]
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides can adopting of using on a kind of automobile
Collect the microphone of 20HZ~10KHZ frequency voice signal, and the Mike that noise reduction and phonetic function will be reached after Speech processing
Wind system.
The utility model can be achieved through the following technical solutions:
The utility model discloses the microphone systems with voice and decrease of noise functions used on a kind of automobile, comprising solid
It is scheduled on the high-performance microphone of ceiling above four seats of automobile, is respectively and fixedly provided with two acquisition vapour inside the high-performance microphone
The microphone of vehicle signal, two microphones are connected with DSP Audio Signal Processing chip by amplifying circuit, at DSP audio signal
It manages chip and multimedia host is connected by amplifying circuit, the multimedia host is described by circuit connection active noise reduction assembly
Active noise reduction assembly passes through circuit connection loudspeaker.Two microphones respectively correspond speech microphone microphone and drop in the prior art
Microphone of making an uproar will acquire after acquiring low frequency signal and high-frequency signal respectively by two microphones fixed inside microphone
Audio signal by circuit transmission into DSP Audio Signal Processing chip, noise reduction microphone microphone acquisition audio signal it is defeated
After entering into DSP Audio Signal Processing chip, DSP Audio Signal Processing chip filters 1KHZ's or more using 1KHZ as critical point
Audio signal, retains 1KHZ audio signal below, and the audio signal of speech microphone microphone acquisition is input to DSP audio signal
After handling in chip, DSP Audio Signal Processing chip filters 1KHZ audio signal below using 1KHZ as critical point, retains
The audio signal of 1KHZ or more, after synthesis, voice signal within the scope of available flat 20HZ~10KHZ, by this voice
After signal is amplified by amplifying circuit, it is input in multimedia host, is sentenced for the speech recognition algorithm in multimedia host
It is disconnected to use, while this signal is input to active noise reduction assembly, the total preconceived plan of active noise reduction by signal circuit by multimedia host
After method is judged, the opposite reversed sound wave of sound wave is issued by loudspeaker for low frequency signal, reaches automobile noise reduction function.
The utility model has the following advantages compared with prior art:
The sound wave that all frequencies are absorbed by two microphones, by DSP Audio Signal Processing chip, by noise reduction microphone miaow
The audio signal of head acquisition filters out the signal of 1KHZ or more, the sound that speech microphone microphone is acquired using 1KHZ as critical point
Frequency signal filters out 1KHZ signal below by critical point of 1KHZ, is transmitted to more matchmakers after synthesizing the audio signal of 20~10KHZ
Body host and the processing of active noise reduction assembly, by the high-performance microphone of the utility model can meet simultaneously on automobile voice and
The function of noise reduction, orthodox car assemble 8 microphones and are reduced to 4 microphones, reduce automotive interior connecting line, reduce automobile
Car body weight greatly reduces automobile production cost.
[Detailed description of the invention]
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing, in which:
Fig. 1 is vehicle microphone distribution schematic diagram in the prior art；
Fig. 2 is vehicle microphone distribution schematic diagram in the utility model；
Fig. 3 is the frequency signal curve of noise reduction microphone acquisition in the prior art；
Fig. 4 is the frequency signal curve of speech microphone acquisition in the prior art；
Fig. 5 is the frequency signal curve synthesized after the acquisition of high-performance microphone in the utility model；
Fig. 6 is speech microphone schematic diagram in the prior art；
Fig. 7 is noise reduction microphone schematic diagram in the prior art；
Fig. 8 is high-performance microphone schematic diagram in the utility model；
Fig. 9 is microphone scheme in the prior art；
Figure 10 is microphone scheme in the utility model；
Figure 11 is the principles of the present invention block diagram；
[specific embodiment]
It elaborates with reference to the accompanying drawing to the embodiments of the present invention:
As shown in Figure 1 to 11, the utility model discloses use on a kind of automobile with voice and decrease of noise functions
Microphone system, the microphone system with voice and decrease of noise functions used on a kind of automobile, it is characterised in that: comprising fixing
The high-performance microphone of ceiling above four seats of automobile is respectively and fixedly provided with two acquisition automobiles inside the high-performance microphone
The microphone of signal, two microphones are connected with DSP Audio Signal Processing chip, DSP Audio Signal Processing by amplifying circuit
Chip connects multimedia host by amplifying circuit, and the multimedia host passes through circuit connection active noise reduction assembly, the master
Dynamic noise reduction assembly passes through circuit connection loudspeaker.Two microphones respectively correspond speech microphone microphone in the prior art and noise reduction
Microphone, after acquiring low frequency signal and high-frequency signal respectively by two microphones fixed inside microphone, by acquisition
Through circuit transmission into DSP Audio Signal Processing chip, the audio signal of noise reduction microphone microphone acquisition inputs audio signal
After into DSP Audio Signal Processing chip, DSP Audio Signal Processing chip filters the sound of 1KHZ or more using 1KHZ as critical point
Frequency signal, retains 1KHZ audio signal below, and the audio signal of speech microphone microphone acquisition is input at DSP audio signal
After managing in chip, DSP Audio Signal Processing chip filters 1KHZ audio signal below using 1KHZ as critical point, retains 1KHZ
Above audio signal, the voice signal within the scope of available flat 20HZ~10KHZ, passes through amplification for this voice signal
It after circuit amplification, is input in multimedia host, carries out judgement use for the speech recognition algorithm in multimedia host, simultaneously will
This signal is input to active noise reduction assembly by signal circuit by multimedia host, after active noise reduction assembly algorithm is judged,
The opposite reversed sound wave of sound wave is issued by loudspeaker for low frequency signal, reaches automobile noise reduction function.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, these embodiments can be carried out with a variety of variations, repaired
Change, replacement and variant, these change, modification, replacement and modification also should be regarded as the protection scope of the utility model.
Claims (1)
1. the microphone system with voice and decrease of noise functions used on a kind of automobile, it is characterised in that: comprising being fixed on vapour
The high-performance microphone of ceiling above four seats of vehicle is respectively and fixedly provided with two acquisition vehicle signals inside the high-performance microphone
Microphone, two microphones are connected with DSP Audio Signal Processing chip, DSP Audio Signal Processing chip by amplifying circuit
Multimedia host is connected by amplifying circuit, the multimedia host passes through circuit connection active noise reduction assembly, the active drop
Assembly of making an uproar passes through circuit connection loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920720787.7U CN209659527U (en) | 2019-05-20 | 2019-05-20 | A kind of microphone system with voice and decrease of noise functions used on automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920720787.7U CN209659527U (en) | 2019-05-20 | 2019-05-20 | A kind of microphone system with voice and decrease of noise functions used on automobile |
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| Publication Number | Publication Date |
|---|---|
| CN209659527U true CN209659527U (en) | 2019-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920720787.7U Active CN209659527U (en) | 2019-05-20 | 2019-05-20 | A kind of microphone system with voice and decrease of noise functions used on automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420029A (en) * | 2020-07-27 | 2021-02-26 | 宝能(广州)汽车研究院有限公司 | Vehicle and sound processing system for vehicle |
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2019
- 2019-05-20 CN CN201920720787.7U patent/CN209659527U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112420029A (en) * | 2020-07-27 | 2021-02-26 | 宝能(广州)汽车研究院有限公司 | Vehicle and sound processing system for vehicle |
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