CN2728149Y - Radio FM earphone with read repeat function - Google Patents
Radio FM earphone with read repeat function Download PDFInfo
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- CN2728149Y CN2728149Y CN 200420075904 CN200420075904U CN2728149Y CN 2728149 Y CN2728149 Y CN 2728149Y CN 200420075904 CN200420075904 CN 200420075904 CN 200420075904 U CN200420075904 U CN 200420075904U CN 2728149 Y CN2728149 Y CN 2728149Y
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Abstract
The utility model relates to a radio FM (frequency modulation) earphone with read repeat function, the casing body of which is a pair of head wearing earphones, a pull-rod antenna is arranged on the casing in which an FM radio receiving circuit is arranged, and the circuit is composed of an FM receiving circuit, an amplifying circuit and a power amplification circuit. The utility model is characterized in that the casing is also provided with a sound resistant moving-coil microphone assembly, the circuit also comprises a digital frequency displaying circuit, and the power amplification circuit is provided with an integrated circuit IC3 capable of respectively amplifying an FM receiving signal and a microphone signal. Due to having the double FM receiving function, the frequency digital display function, the self-say, self-listen and read following functions, the daylight lamp interference resistant function and the functions of respectively and independently regulating FM receiving sound volume and self-say and self-listen sound volume, the utility model can be convenient for users (in particular for students) to calibrate pronunciation and imitate learning and simultaneously can enhance the users' listening and saying abilities so as to obtain the purpose of quickly learning a language.
Description
Technical field
The utility model is a kind of radio FM earphone with record function.
Background technology
Along with deepening continuously of educational reform, externally the speak requirement of listening and speaking ability of state education department improves constantly, and before 25 years, requires the student can see, can write; Required the student can see, can write, can listen before 15 years; In recent years propose again to see, can write, can listen, talkative " four energy " requirement.After having learned for many years foreign language, whether the foreign language that the student can listen, say standard, manyly now examines or check by SET.
Yield good results in order to examine, the student must practise at ordinary times.How to practise? and then RP is imitated exercise and is improved the best method of listening, saying ability exactly.Language repeater is arranged in the market, voiced band is arranged from saying from the earphone of listening, also has multi-media voice intercommunication tutoring system, these products use all certain limitation: at first be that scope is big inadequately, can not utilize school existing high-power frequency radio station to play the unified standard tape, make student's can listen to Anywhere in the campus; The secondth, products such as language repeater use more loaded down with trivial details, and the student also will provide a lot of tapes for oneself, spend bigger; The 3rd is to accomplish a tractor serves several purposes, that is to say can not both possess simultaneously and can practice and read, and also can carry out the function that unified hearing examination is used; The 4th is to lack digital display function, lack anti-Japanese light modulation electron rectifier interference function, causes student's audibility poor; The 5th is that FM reception volume and microphone volume can not control respectively, and the FM reception volume has mixed up sometimes, and microphone is not enough with the pronunciation amount, and microphone has mixed up with the pronunciation amount sometimes, and the FM reception volume is improper again.
Summary of the invention
Technical problem to be solved in the utility model is: the radio FM earphone that the very strong band record function of a kind of practicality is provided, the enough microphones of its energy pick up user's pronunciation, after delivering to earphone horn by the electronic circuit amplification again, be reduced into sound, allow the user listen, the sound of at this moment hearing is a kind of objective sound that is not subjected to external interference that picks up by microphone again in the air that diffuses to.Like this, the user can not only more clearly distinguish oneself pronunciation and the difference of RP, and cerebral cortex is stimulated stronger, thereby raising memory reaches the purpose of quick Learning a Language.
The technical scheme that the utility model adopted is: its chassis body is a secondary headphone, telescopic antenna is housed on the casing, the frequency modulation wireless receiving circuit is housed in the casing, this circuit is formed and is comprised modulating FM reception, amplification and power amplifier, it is characterized in that casing also is equipped with sound impedance moving coil type microphone assembly, circuit is formed and is also comprised the numerical frequency display circuit; In the power amplifier, be provided with the integrated circuit (IC) 3 that FM reception signal and microphone signal can be amplified respectively.
The utility model compared with prior art has following major advantage:
The one, novel structure: installed detachable moving-coil microphone assembly additional, and the frequency digital display technique.
The 2nd, a tractor serves several purposes: can not only listen to school and checking station, city program, and can carry out four, six grades of foreign language examinations, and can carry out from saying from listening exercise spoken.Simultaneously, this machine can be saved user's spending.
The 3rd, behind the employing frequency digital display technique, can make things convenient for the student to find required radio station in the school accurately in a plurality of frequency zones.
The 4th, partly installed 100 μ F inductance additional in FM reception the left side of earphone has been separated to power supply signal line between the earphone right side and main circuit board, make the interference signal of responding on the line not arrive mainboard, thereby eliminated interference, made the student learn under fluorescent light can not hear drone noise.
The 5th, be to amplify according to the FM reception signal and the microphone signal of foreign language RP learning by imitation machine by same integrated circuit (IC) 3, two sound channels of IC3 are worked respectively, and adjust volume respectively with two potentiometers, promptly save cost, guaranteed FM reception volume and microphone volume, flexible again.
The 6th, talked about acoustic fidelity because of having adopted the moving-coil microphone of special high impedance, can having made.
In a word, the utility model is owing to having frequency modulation-frequency modulation receiving function, frequency numeral Presentation Function, saying from listening with reading function certainly, anti-Japanese light modulation interference function, FM reception volume, from saying from listening volume independent regulatory function respectively, therefore, the person of being easy to use especially student calibrates pronunciation and learning by imitation, can improve its tin simultaneously, say ability, reaches the purpose of quick Learning a Language.
Description of drawings
Accompanying drawing is circuit theory diagrams of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with embodiment and accompanying drawing.
The utility model is a kind of radio FM earphone with record function, its chassis body is a secondary headphone, telescopic antenna is housed on the casing, sound impedance moving coil type microphone assembly and frequency modulation wireless receiving circuit are housed in the casing, and this circuit is formed and is comprised modulating FM reception, numerical frequency demonstration, amplification and power amplifier.In the power amplifier, be provided with the integrated circuit (IC) 3 that FM reception signal and microphone signal can be amplified respectively.
Because people's brain at short notice can very complete memory to a kind of strange language pronouncing, if and then imitation can be more true to nature immediately, but a problem is arranged, that imitation people oneself is that the muscle by the people is radiated in the ear, the sound that not to be sound radiation shake in the air again people's ear-drum is heard, so oneself but be difficult to debate not very accurately, the imitation effect is also very poor.At this situation, above-mentioned integrated circuit (IC) 3 can adopt for example TDA2822 chip with dual track, the signal that a sound channel of this chip is received as FM radio station amplifies, another sound channel is picked up the amplification of sound as the post pole microphone, and adjust volume respectively with two potentiometers, promptly save cost, guaranteed FM reception volume and microphone volume, flexible again.
Integrated circuit (IC) 3 with the annexation of its peripheral circuit is: integrated circuit (IC) 3, its pin 1 connects potentiometer R19 one end through capacitor C 27, C28, the serial connection point of capacitor C 27, C28 connects the potentiometer R19 other end through resistance R 16, and the center-side of potentiometer R19 connects the end of change over switch K3 contact 3 and potentiometer R18 through resistance R 17; Its pin 4 ground connection; Its pin 3 connects inductance H through capacitor C 32 negative poles
1One end, inductance H
1The other end connects the loudspeaker LS1 in the earphone; Its pin 5 connects the center-side of potentiometer R18, and the other end of R18 connects triode Q4 collector electrode; Its pin 6 is through capacitor C 35 minus earths; Its pin 7,8 is respectively through the microphone MK1 two ends of anodal cross-over connection in earphone of capacitor C 33, C34, C34 minus earth.
Above-mentioned circuit is formed and is also comprised anti-Japanese light modulation electron rectifier interfered circuit, and this circuit is provided with the inductance H of 100 μ F
2, H
3, the one end connects earphone socket, H
2The other end connect change over switch K1 contact E and meet integrated circuit (IC) 3 pin 2, H through switch S 5
3The other end through the anodal lug machine transplanting of rice of battery BT1 seat.Inductance H
2, H
3Effect be: the left side of earphone can be separated to power supply signal line between the earphone right side and main circuit board, make the interference signal of responding on the line not arrive mainboard, thereby eliminated interference, make the student learn under fluorescent light can not hear drone noise.
Above-mentioned sound impedance moving coil type microphone assembly is a kind of dismountable moving coil type microphone assembly, it comprises high impedance moving-coil microphone, socket and contact pin, microphone is that a kind of list highly sensitive, that fidelity is good points to the post pole microphone, it can link to each other with socket on the earphone by contact pin, like this, can plug at any time or take off, make things convenient for the user.
Above-mentioned numerical frequency display circuit, be provided with numerical frequency display screen, integrated circuit (IC) 2 and peripheral circuit, its annexation is: be provided with numerical frequency display screen J1, integrated circuit (IC) 2 and peripheral circuit, its annexation is: integrated circuit (IC) 2, and its pin 1,2,14,15 is respectively through capacitor C 5, C1, C6, C4 ground connection; Its pin 3,4 is through button S1 ground connection, again by diode D3 positive pole through button S4 ground connection; Each presses keyed jointing diode D1 positive pole through one its pin 5,6, and the D1 negative pole is through button S4 ground connection; Its pin 7,9 connects change over switch K1 contact F, triode Q1 collector electrode, connects its pin 11 through light-emitting diode D4 positive pole again; Its pin 8 connects change over switch K1 contact D, connects triode Q1 base stage through resistance R 6 again; Its pin 10 connects change over switch K1 contact C and resistance R 8 one ends, R8 other end ground connection through resistance R 7; Its pin 12,13 connects change over switch K1 contact B, A respectively; Its pin 14,15 also meets crystal oscillator X1; Its pin 19 to 26 is connected one by one with pin 8 to the pin 1 of numerical frequency display screen J1; Its power positive end VCC connects triode Q1 emitter, change over switch K1 contact E; Change over switch K1 contact G ground connection.
In the accompanying drawing: frame of broken lines (1), (2), (3), (6) and (7) are respectively that numerical frequency display circuit, FM receiving unit, height are put part, audio interface receiving portions and anti-Japanese light modulation electron rectifier interfered circuit.Frame of broken lines (4), (5) are respectively from reading aloud part, power amplifying part, the power amplifier that its formation is above-mentioned.The integrated circuit (IC) 1 of FM receiving unit can adopt for example SC3610 chip.
The utility model is a kind of frequency modulation wireless receiving earphone, puts on such set of headphones, both can hear the RP that play in the radio station, can hear the imitation pronunciation of oneself again.Its course of work is: by the FM signal of the emission of the frequency modulation wireless receiving circuit receiver/transmitter in its casing, and the microphone in enough its casings of energy picks up user's pronunciation, filtration through power amplifier IC3 amplification and anti-Japanese light modulation electron rectifier interfered circuit, be reduced into sound after delivering to earphone horn, deliver to again in people's the ear, at this moment imitating the sound that the people hears is a kind of objective sound that is not subjected to external interference that picks up by microphone again in the air that diffuses to, and that is to say it has been the original sound of oneself.Just look like to be that others speaks you are listening, people's brain has a very complete in a short time memory again to this sound, if and then put one time RP again, people's brain can be made very careful distinguishing to oneself pronunciation and RP, and then the pronunciation of imitation once, at this moment own can to cut own pronunciation by earphone very approaching apart from RP, as long as adhere to practising, learner's spoken language pronunciation can very fast raising again.
Claims (5)
1. radio FM earphone with record function, its chassis body is a secondary headphone, telescopic antenna is housed on the casing, the frequency modulation wireless receiving circuit is housed in the casing, this circuit is formed and is comprised modulating FM reception, amplification and power amplifier, it is characterized in that casing also is equipped with sound impedance moving coil type microphone assembly, circuit is formed and is also comprised the numerical frequency display circuit; In the power amplifier, be provided with the integrated circuit (IC) 3 that FM reception signal and microphone signal can be amplified respectively.
2. the radio FM earphone of band record function according to claim 1, it is characterized in that integrated circuit (IC) 3 adopts the TDA2822 chip, its annexation with peripheral circuit is: integrated circuit (IC) 3, its pin 1 connects potentiometer R19 one end through capacitor C 27, C28, the serial connection point of capacitor C 27, C28 connects the potentiometer R19 other end through resistance R 16, and the center-side of potentiometer R19 connects the end of change over switch K3 contact 3 and potentiometer R18 through resistance R 17; Its pin 4 ground connection; Its pin 3 connects inductance H through capacitor C 32 negative poles
1One end, inductance H
1The other end connects the loudspeaker LS1 in the earphone; Its pin 5 connects the center-side of potentiometer R18, and the other end of R18 connects triode Q4 collector electrode; Its pin 6 is through capacitor C 35 minus earths; Its pin 7,8 is respectively through the microphone MK1 two ends of anodal cross-over connection in earphone of capacitor C 33, C34, C34 minus earth.
3. the radio FM earphone of band record function according to claim 1 is characterized in that described circuit composition also comprises anti-Japanese light modulation electron rectifier interfered circuit, and this circuit is provided with the inductance H of 100 μ F
2, H
3, the one end connects earphone socket, H
2The other end connect change over switch K1 contact E and meet integrated circuit (IC) 3 pin 2, H through switch S 5
3The other end through the anodal lug machine transplanting of rice of battery BT1 seat.
4. the radio FM earphone of band record function according to claim 1 is characterized in that sound impedance moving coil type microphone assembly comprises high impedance moving-coil microphone, socket and contact pin, and microphone links to each other with socket on the earphone by contact pin.
5. the radio FM earphone of band record function according to claim 1, it is characterized in that the numerical frequency display circuit, be provided with numerical frequency display screen J1, integrated circuit (IC) 2 and peripheral circuit, its annexation is: integrated circuit (IC) 2, and its pin 1,2,14,15 is respectively through capacitor C 5, C1, C6, C4 ground connection; Its pin 3,4 is through button S1 ground connection, again by diode D3 positive pole through button S4 ground connection; Each presses keyed jointing diode D1 positive pole through one its pin 5,6, and the D1 negative pole is through button S4 ground connection; Its pin 7,9 connects change over switch K1 contact F, triode Q1 collector electrode, connects its pin 11 through light-emitting diode D4 positive pole again; Its pin 8 connects change over switch K1 contact D, connects triode Q1 base stage through resistance R 6 again; Its pin 10 connects change over switch K1 contact C and resistance R 8 one ends, R8 other end ground connection through resistance R 7; Its pin 12,13 connects change over switch K1 contact B, A respectively; Its pin 14,15 also meets crystal oscillator X1; Its pin 19 to 26 is connected one by one with pin 8 to the pin 1 of numerical frequency display screen J1; Its power positive end VCC connects triode Q1 emitter, change over switch K1 contact E; Change over switch K1 contact G ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420075904 CN2728149Y (en) | 2004-07-06 | 2004-07-06 | Radio FM earphone with read repeat function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420075904 CN2728149Y (en) | 2004-07-06 | 2004-07-06 | Radio FM earphone with read repeat function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2728149Y true CN2728149Y (en) | 2005-09-21 |
Family
ID=35044153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420075904 Expired - Fee Related CN2728149Y (en) | 2004-07-06 | 2004-07-06 | Radio FM earphone with read repeat function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2728149Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731770A (en) * | 2012-10-11 | 2014-04-16 | 黄璨 | Self-talking self-listening headset |
-
2004
- 2004-07-06 CN CN 200420075904 patent/CN2728149Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731770A (en) * | 2012-10-11 | 2014-04-16 | 黄璨 | Self-talking self-listening headset |
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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 |