CN2394291Y - Electronic silencer in small space - Google Patents
Electronic silencer in small space Download PDFInfo
- Publication number
- CN2394291Y CN2394291Y CN 99239648 CN99239648U CN2394291Y CN 2394291 Y CN2394291 Y CN 2394291Y CN 99239648 CN99239648 CN 99239648 CN 99239648 U CN99239648 U CN 99239648U CN 2394291 Y CN2394291 Y CN 2394291Y
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- noise
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Abstract
The utility model relates to an electronic silencer for limit space. The utility model comprises a sound source detecting sensor, a silencing detecting microphone, an electronic silencing controller and a loudspeaker, wherein, the sound source detecting sensor is used for acquiring noise needs controlling, and is arranged on the pathway from which the noise needs to controlling is sent; the silencing detecting microphone is used for acquiring the silenced noise, and is arranged in the limit space needs to silencing; the electronic silencing controller can receive signals sent by the sound source detecting sensor and the silencing detecting microphone, and can output a silencing sound signal to the loudspeaker after real-time processing and calculation; the loudspeaker which is arranged between the sound source detecting sensor and the silencing detecting microphone can cause an electric signal coming from the electronic silencer to be converted to silenced sound.
Description
The utility model relates to the active active control device of a kind of noise, relates in particular to finite space electronics sound suppressor.
It is the earmuff in little space, the pipeline of the one-dimensional space that the active active control device of existing electronic noise only limits to, and for some occasions than large space, as car, boats and ships etc., reducing the measure that noise processed adopts the reinforcement rigidity of structure often or installs acoustic hood, common sound suppressor additional, these measures often are subjected to the restriction in cost, space and are difficult to carry out, and these measures are effective to reducing middle and high audio-frequency noise, in reducing, low-frequency effect is very limited.
The purpose of this utility model provides in a kind of can effectively the reduction, low-frequency noise and finite space electronics sound suppressor with low cost.
In order to realize above-mentioned purpose, the utility model finite space electronics sound suppressor is arranged in the finite space, and it comprises: the sound Sources Detection sensor is used to gather the noise of needs control, on the approach that the noise that being arranged on needs control transmits; Eliminate the noise to detect microphone, be used to gather the noise after the noise elimination, be arranged in the finite space that needs to eliminate the noise; Electronics noise elimination controller, it receives the sound Sources Detection sensor and eliminates the noise and detect the signal that microphone transmits, by exporting the noise elimination voice signal to loudspeaker after the real-time processing computing; Loudspeaker, it is arranged on the sound Sources Detection sensor and eliminate the noise detects between the microphone, promptly needs between the finite space that the noise controlled and needs eliminate the noise, and this loudspeaker will be from the sound of the electrical signal conversion one-tenth noise elimination of electronics sound suppressor.
Above-mentioned finite space electronics sound suppressor, wherein, electronics noise elimination controller comprises: two input amplifiers, they are divided into independently two-way, receive the electric signal that sound Sources Detection sensor and noise elimination detection microphone transmit respectively, carry out signal and amplify; Two analog digital/digital analog converters, they comprise two-way analog-digital converter and No. one digital analog converter altogether, the corresponding respectively input amplifier that connects of every road analog-digital converter, receive the analog electrical signal of input amplifier, and convert digital signal output to, No. one digital analog converter is the digital electric signal that transmits of receiving digital signals processor then, and converts analog electrical signal output to; Digital signal processor receives the digital electric signal of two-way analog-digital converter output, handle computing in real time after, the digital electric signal that is used to eliminate the noise to digital analog converter output; Output amplifier receives the analog electrical signal that digital analog converter transmits, and amplifies the rear drive loudspeaker.
Owing to adopted above-mentioned technical solution, in original sound field at the finite space of needs control noise (for example, car, ship's space, pulpit etc.) in, produce and the relevant sound of the noise that needs control by the utility model finite space electronics sound suppressor, produce interference in sound field, some spatial sound is superimposed, and some spatial sound offsets-promptly eliminate noise, reduce the medium and low frequency noise to reach, generally the noise reduction of medium and low frequency can reach 5～25 decibels in the useful space.
Below in conjunction with embodiment and accompanying drawing the utility model is further described.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the circuit module connection layout that the electronics of the utility model finite space electronics sound suppressor is eliminated the noise and controlled.
By shown in Figure 1, the utility model finite space electronics sound suppressor, it comprises:
Sound Sources Detection sensor 1 is used to gather the noise of needs control, on the approach that the noise that being arranged on needs control transmits;
Eliminate the noise to detect microphone 2, be used to gather the noise after the noise elimination, be arranged in the finite space that needs to eliminate the noise;
Electronics noise elimination controller 3, it receives sound Sources Detection sensor 1 and eliminates the noise and detect the signal that microphone 2 transmits, by exporting the noise elimination voice signals to loudspeaker 4 after the real-time processing computing;
Loudspeaker 4, it is arranged on sound Sources Detection sensor 1 and eliminate the noise detects between the microphone 2, promptly needs between the finite space that the noise controlled and needs eliminate the noise, and this loudspeaker 4 will be from the sound of the electrical signal conversion one-tenth noise elimination of electronics sound suppressor.
Above-mentioned electronics noise elimination controller 3 comprises:
Two input amplifiers 31, they are respectively applied for the amplification of each signal, in circuit, they are divided into independently two-way, each input end receives sound Sources Detection sensor 1 respectively and eliminates the noise and detect the electric signal that microphone 2 transmits, each output terminal connects the input end of each analog-digital converter 32 respectively, and it is the integrated circuit (IC) chip of TPA7668 that this input amplifier 31 can adopt model;
Two analog digital/digital analog converters, they comprise two-way analog-digital converter 32 and No. one digital analog converter 321, the corresponding respectively output terminal that connects an input amplifier 31 of the input end of every road analog-digital converter 32, receive the analog electrical signal of input amplifier 31, and convert to digital signal by serial port S.P. to digital signal processor 33 outputs; This No. one digital analog converter 321 receives the digital electric signal that the serial port S.P. by digital signal processor 33 transmits, convert the input end output of analog electrical signal to output amplifier 34 to, it is the integrated circuit (IC) chip of TLA01 that this analog digital/digital analog converter can adopt model;
Claims (2)
1. finite space electronics sound suppressor, it is arranged in the finite space, it is characterized in that, and this electronics sound suppressor comprises:
The sound Sources Detection sensor is used to gather the noise of needs control, on the approach that the noise that being arranged on needs control transmits;
Eliminate the noise to detect microphone, be used to gather the noise after the noise elimination, be arranged in the finite space that needs to eliminate the noise;
Electronics noise elimination controller, it receives the sound Sources Detection sensor and eliminates the noise and detect the signal that microphone transmits, by exporting the noise elimination voice signal to loudspeaker after the real-time processing computing;
Loudspeaker, it is arranged on the sound Sources Detection sensor and eliminates the noise and detect between the microphone, the sound that this loudspeaker will become to eliminate the noise from the electrical signal conversion of electronics sound suppressor.
2. a kind of finite space electronics sound suppressor according to claim 1 is characterized in that, this electronics noise elimination controller comprises:
Two input amplifiers, they are divided into independently two-way, receive the electric signal that sound Sources Detection sensor and noise elimination detection microphone transmit respectively, carry out signal and amplify;
Two analog digital/digital analog converters, they comprise two-way analog-digital converter and No. one digital analog converter altogether, the corresponding respectively input amplifier that connects of every road analog-digital converter, receive the analog electrical signal of input amplifier, and convert digital signal output to, No. one digital analog converter is the digital electric signal that transmits of receiving digital signals processor then, and converts analog electrical signal output to;
Digital signal processor receives the digital electric signal of two-way analog-digital converter output, handle computing in real time after, the digital electric signal that is used to eliminate the noise to digital analog converter output;
Output amplifier receives the analog electrical signal that digital analog converter transmits, and amplifies the rear drive loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99239648 CN2394291Y (en) | 1999-09-16 | 1999-09-16 | Electronic silencer in small space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99239648 CN2394291Y (en) | 1999-09-16 | 1999-09-16 | Electronic silencer in small space |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2394291Y true CN2394291Y (en) | 2000-08-30 |
Family
ID=34026867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99239648 Expired - Fee Related CN2394291Y (en) | 1999-09-16 | 1999-09-16 | Electronic silencer in small space |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2394291Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727895B (en) * | 2008-10-20 | 2012-06-06 | 联想(北京)有限公司 | Noise reduction device, computer and noise reduction method |
| CN112530397A (en) * | 2020-12-26 | 2021-03-19 | 深圳前海振百易科技有限公司 | Device for eliminating environmental noise by building implantation |
-
1999
- 1999-09-16 CN CN 99239648 patent/CN2394291Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101727895B (en) * | 2008-10-20 | 2012-06-06 | 联想(北京)有限公司 | Noise reduction device, computer and noise reduction method |
| CN112530397A (en) * | 2020-12-26 | 2021-03-19 | 深圳前海振百易科技有限公司 | Device for eliminating environmental noise by building implantation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |