CN2138824Y - Silencer - Google Patents
Silencer Download PDFInfo
- Publication number
- CN2138824Y CN2138824Y CN 92235947 CN92235947U CN2138824Y CN 2138824 Y CN2138824 Y CN 2138824Y CN 92235947 CN92235947 CN 92235947 CN 92235947 U CN92235947 U CN 92235947U CN 2138824 Y CN2138824 Y CN 2138824Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- band
- utility
- model
- pass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a silencer, which is characterized in that an amplifying circuit 1 is connected with a telephone transmitter S, a delay circuit 2, 3 is connected with the amplifying circuit 1, a band-pass circuit 4 is connected with the delay circuit 2, 3, and a loudspeaker Y is connected with the band-pass circuit 4; the utility model has the advantages of wide adaptive range and comfortable wearing; as the band-pass circuit is adopted, noise can be eliminated, and other frequency band sound can be still heard by people; therefore, the utility model does not influence a person's hearing ability, and noise damage can also be avoided.
Description
The utility model relates to a kind of device of eliminating noise, especially a kind of exhaust box.
At present, people generally recognize the harmfulness of noise on human body, for this reason, done many effort, avoiding noise hazard, the earphone of making as the modal material that is to use a kind of usefulness to have sound absorbing capabilities, but can only absorb the sound of some frequency range, adaptive surface is narrow and wear uncomfortable.
The purpose of this utility model provides a kind of exhaust box of eliminating noise.
Technical solution of the present utility model is a kind of exhaust box, it is characterized in that: be connected to amplifying circuit 1 with transmitter S, be connected to delay circuit 2,3 with amplifying circuit 1, be connected to band-pass circuit 4, be connected to loudspeaker Y with band-pass circuit 4 with delay circuit 2,3.
The utility model compared with prior art owing to adopted Principles of Acoustics to make, adapts to wide and wears comfortable, be provided with band-pass circuit, can eliminate noise, and the sound people ear in other frequency range still can be heard, promptly do not influence people's hearing, can avoid the harm of noise again.
Accompanying drawing 1 is the block scheme of the utility model embodiment.
Accompanying drawing 2 is a clock circuit schematic diagram among the utility model embodiment.
Accompanying drawing 3 is the circuit theory diagrams of the utility model embodiment.
Below in conjunction with drawings and Examples the utility model is further described.
Be connected to amplifying circuit 1 with transmitter S as shown in Figure 1, be connected to delay circuit 2,3, be connected to band-pass circuit 4, be connected to loudspeaker Y with band-pass circuit 4 with delay circuit 2,3 with amplifying circuit 1.
As shown in Figure 2, be connected to resistance R 2 with transmitter S, amplifying circuit 1 is by operational amplifier A 1(F007), resistance R 3, Rf2 join and form.
The delay circuit 2 that joins with amplifying circuit 1 is that the integrated simulated dual of CMOS is to K switch 1～K6, capacitor C 1, C2, C3 and operational amplifier A 2(F007) joining forms.
The switching of the integrated simulation two-way switch of CMOS in the delay circuit 2,3, by clock circuit shown in Figure 3 control, clock circuit is by 555 timers, outer meeting resistance R
A, R
B, capacitor C 9, C10 and Sheffer stroke gate IC join and form.
Band-pass circuit 4 is operational amplifier A 3(F007), its anode is connected to variable resistor R5, R6, capacitor C 7, C8, its negative terminal connecting resistance R8, the other end connecting resistance R7 of capacitor C 8, the output terminal of another termination operational amplifier A 3 of resistance R 7, the negative terminal of operational amplifier A 3 and output terminal connecting resistance R9, the output termination loudspeaker Y of operational amplifier A 3.
Claims (1)
1, a kind of exhaust box is characterized in that: be connected to amplifying circuit 1 with transmitter S, be connected to delay circuit 2,3 with amplifying circuit 1, be connected to band-pass circuit 4 with delay circuit 2,3, be connected to loudspeaker Y with band-pass circuit 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92235947 CN2138824Y (en) | 1992-10-28 | 1992-10-28 | Silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92235947 CN2138824Y (en) | 1992-10-28 | 1992-10-28 | Silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2138824Y true CN2138824Y (en) | 1993-07-21 |
Family
ID=33777616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92235947 Expired - Fee Related CN2138824Y (en) | 1992-10-28 | 1992-10-28 | Silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2138824Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105103219A (en) * | 2013-11-11 | 2015-11-25 | 赵春宁 | Noise reduction method |
-
1992
- 1992-10-28 CN CN 92235947 patent/CN2138824Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105103219A (en) * | 2013-11-11 | 2015-11-25 | 赵春宁 | Noise reduction method |
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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 |