CN2514599Y - Multi-voice frequency output device - Google Patents
Multi-voice frequency output device Download PDFInfo
- Publication number
- CN2514599Y CN2514599Y CN 01268074 CN01268074U CN2514599Y CN 2514599 Y CN2514599 Y CN 2514599Y CN 01268074 CN01268074 CN 01268074 CN 01268074 U CN01268074 U CN 01268074U CN 2514599 Y CN2514599 Y CN 2514599Y
- Authority
- CN
- China
- Prior art keywords
- microphone
- jack
- utility
- earphone
- output device
- 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 - Lifetime
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- Headphones And Earphones (AREA)
Abstract
The utility model relates to an audio dividing output device, comprising at least two pairs of earphone and microphone jacks, wherein the earphone jack and the microphone jack are connected in parallel on an earphone jack and a microphone jack of a sound card. The utility model can cause a plurality of persons to use one computer simultaneously and not have interference with each other, and the exported audio is basically the same with the original output. The utility model can be widely used at school, thereby not only reducing the educational expenses of school but also guaranteeing the teaching effect.
Description
Technical field
The utility model relates to audio frequency output, particularly a kind of minute audio frequency output device.
Background technology
Along with popularizing of computer, computer teaching has become the more and more important educational mode of school, and many courses all adopt computer teaching.But because the restriction of condition, the shared computer of often plural student does not interfere with each other between each computer in order to make in the classroom, and generally without the audio amplifier of computer, the student uses headset to listen to the teacher.But because a computer has only a receiver J-Horner and a Microphone, so, can only use headset to give a lesson on computers by a people, can not be simultaneously on class with a computer by plural people.School is necessary for each student and buys a computer, has increased the expenditure of education funds.Simultaneously, computer receiver J-Horner has also limited the chance that computer is used by many people simultaneously in family or other place.
The utility model content
The purpose of this invention is to provide a kind of minute audio frequency output device, make a plurality of people can use a computer simultaneously.
For achieving the above object, divide the audio frequency output device to have two pairs of earphones and microphone jack at least.
Described earphone jack and microphone jack are parallel-connected to the earphone jack and the microphone jack of sound card.
The utility model can make a plurality of people use a computer simultaneously, does not disturb each other, and the audio frequency of output is identical with former output basically, can be widely used in school, has both reduced the education funds of school, has ensured teaching efficiency again.
Description of drawings
Fig. 1 is a schematic appearance of the present utility model;
Fig. 2 is an electrical schematic diagram of the present utility model.
The execution mode of utility model
Below in conjunction with accompanying drawing the utility model is described.As shown in Figure 1, divide the audio frequency output device can insert two headsets, use simultaneously and do not disturb mutually each other by two people.This minute audio frequency output device is particularly suitable for student's use of school, because the desk of school all is that two students are shared, places a computer and get final product on a desk.
As shown in Figure 2, L represents that earphone left channel signals, R represent that earphone right-channel signals, G represent that ground wire, S represent microphone signal.SPK is respectively headset plug and the microphone plug that is connected with sound card with MIC.SPK1, MIC1, SPK2, MIC2 are respectively two users' earphone and microphone plug.Each user's earphone and microphone plug SPK1, MIC1, SPK2, MIC2 are parallel on the headset plug and microphone plug SPK and MIC on the sound card.If surpass two shared computers of user, can a plurality of SPK3 in parallel, MIC3, SPK4, MIC4 on headset plug and microphone plug SPK and MIC, how many headset plugs in parallel and microphone plug depend on the power output of sound card.The impedance of the multimedia headset of standard is 32 ohm, power is at 15 ~ 50Mw, and general sound card also has the above power output of 100Mw, when external earphone when one is increased to two, output voltage is reduced to 1.03V from 1.1V, the decline of earpiece volume is very little, is more or less the same with the sound that uses a headset.For the sound card that power amplifier is arranged, can export higher voltage, therefore, can expand the quantity (more than 4 pairs) of earphone jack according to structure of the present utility model.The impedance of microphone is about 2K, and when a plurality of microphones were in parallel, the 5V of operating voltage during from single microphone was reduced to 4.95V, to not influence of recording effect.Because the frequency of sound is at 20Hz ~ 20KHz, electromagnetic radiation is very little, does not need to be provided with filter circuit.
Claims (3)
1. a branch audio frequency output device is characterized in that having at least two pairs of earphones and microphone jack.
2. by the described device of claim 1, it is characterized in that described earphone jack and microphone jack are parallel-connected to the earphone jack and the microphone jack of sound card.
3. by claim 1 or 2 described devices, it is characterized in that described earphone and microphone are 4 pairs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01268074 CN2514599Y (en) | 2001-11-01 | 2001-11-01 | Multi-voice frequency output device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01268074 CN2514599Y (en) | 2001-11-01 | 2001-11-01 | Multi-voice frequency output device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2514599Y true CN2514599Y (en) | 2002-10-02 |
Family
ID=33674328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01268074 Expired - Lifetime CN2514599Y (en) | 2001-11-01 | 2001-11-01 | Multi-voice frequency output device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2514599Y (en) |
-
2001
- 2001-11-01 CN CN 01268074 patent/CN2514599Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111101 Granted publication date: 20021002 |