CN105245990A - External audio source import system based on closed headset - Google Patents
External audio source import system based on closed headset Download PDFInfo
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- CN105245990A CN105245990A CN201510704916.XA CN201510704916A CN105245990A CN 105245990 A CN105245990 A CN 105245990A CN 201510704916 A CN201510704916 A CN 201510704916A CN 105245990 A CN105245990 A CN 105245990A
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Abstract
The invention discloses an external audio source import system for a closed headset. The system can solve a problem that a user of the closed headset in the use of the headset must take off the headset when the user needs to communicate with others, because the user does not hear the sound of the outside world. The system can achieve the following functions: the headset user who uses the headset to listen to music can touch a capacitive button to cut off a signal source from a mobile phone or other players, and can hear an external sound by playing an external audio signal collected by a microphone so as to communicate with people around; when the headset user who do not want to be interfered by the outside, the headset user touches the capacitive button again to cut off the signal source of the microphone so as to continue the output of the audio signal of the player, and can continue to enjoy music in a full closed environment of the closed headset without the external sounds. Furthermore, the system is illustrated in detail through three examples.
Description
Technical field
The present invention relates to a kind of extraneous sound source import system based on closed earphone, current closed earphone adds an external sound acquisition system, belongs to electronic circuit technology field.
Background technology
Earphone, from himself structure, can be divided into 3 classes: open earpiece, semi open model earphone, and closed earphone.
Open earpiece refers to that the shell of earphone is open, and substantially do not wrap up ear, therefore open earpiece is when listening to the music, and sound becomes open state, and extraneous sound can pass into, and the sound in earphone also can spread out of.The advantage of open earpiece wears very comfortable, and ear does not have constriction, and small volume, and the sound of tonequality aspect open earpiece is generally relatively more natural, and sound field is broad, and sound relaxes, and sense of hearing is light.The shortcoming of open earpiece is isolated bad due to the external world, and extraneous noise can flow into earphone, and the audio frequency in the earphone also easy intensity that causes because leaking declines, particularly for the low-frequency component in sound.
Closed earphone refers to that the shell of earphone is closed, ear is wrapped up by large and abundant ear pad completely that carried by it, makes headphones sound become closed state, and extraneous sound can not enter earphone, sound in earphone also can not flow into the external world, defines good isolation with external environment.The advantage of closed earphone is good with the isolation in the external world, even if also can not have influence on the sound effect of earphone under the environment that noise is very large, and owing to preventing sound to leak, makes headphones sound very clear, and details is enriched, and particularly LF-response is very good.The shortcoming of closed earphone is, volume ratio is comparatively large, and weight is also relatively large.
Semi open model earphone combines open earpiece and closed earphone feature separately, is the compromise of the two performance.
For closed earphone, because user is when use earphone, extraneous sound cannot be heard, when user people at one's side carries out exchanging with user time, user just must by earphone from the beginning on take, and due to closed earphone general all very large, just cause the inconvenience that earphone uses.
There is several method at present, the user solving closed earphone exchanges inconvenient problem when listening to playback equipment with the external world.
Such as more representational: invention " a kind of acoustic feature earphone earplug and earphone; application number 201210012309.3; date of application 2012-01-16 ", at the conduit that closed earphone inside increase by is hollow, conduit goes directly earphone outer surface, be a small pore-like at outer surface, aperture adds valve to ensure the seal of closed earphone.The existence of conduit, divide into two sound channels physically headset earpiece, and one is the sound channel of the acoustical signal that headset earpiece transmission is changed to come by the signal of telecommunication, and one is the sound channel being received the external sound signal imported into through duct cavity again by extraneous aperture.The advantage of this method is: extraneous voice signal is not through digitized processing such as any sampling, quantifications, import in user's ear with regard to direct through cavity, ensure that the external sound that user needs is undistorted, allowing user when accepting external sound, substantially can not be subject to the impact of earphone.And when user only needs the sound of headset earpiece, when not wanting to be disturbed by external sound, by the valve of earphone outer surface, the original height closure of closed earphone can be ensured.But the shortcoming of this method is also clearly, due to the cavity increased in earphone inside, the original cavity body structure of closed earphone changed, and the structure function of earphone cavity is mainly eliminated acoustic short circuit, suppresses acoustic resonance, widens Hz-KHz, is reduced distortion.The size of the space size of cavity body structure, inner sound reflecting rule, carrying loudspeaker, directly can affect the tonequality of sound, headphone is more outstanding than the sound field of earplug, and Here it is by structures shape.And the change of this closed earphone cavity body structure caused due to cavity, very large impact will certainly be caused on closed earphone original high-fidelity tonequality.
More representational for another example: as shown in Figure 1, invention " Headphone device and the method for operation for it; application number 201080024490.9; date of application 2010-05-27 " increases a hollow conduit in closed earphone inside, conduit goes directly earphone outer surface, be a small pore-like at outer surface, form the sound channel that is collected external environmental sounds, this sound channel is controlled and the UNICOM of external environment or isolated by a valve in hollow tubing conductor inside.The microphone simultaneously carried by earphone gathers extraneous voice signal, change voice signal into the signal of telecommunication, pass to a control circuit, by control circuit, the calculating such as spectrum analysis are carried out to this signal of telecommunication, infer extraneous environment, and export a control signal and act on valve in hollow tubing conductor, carry out the opening degree of by-pass valve control, valve open larger, then the sound of external environment flow into more.The advantage of this method is: the attenuation being carried out the closed earphone of adaptive adjustment sound to external world by control circuit, and when the external world is very noisy time, control circuit cuts out completely by valve, then closed earphone presents full closeding state to external world; When the external world is more quiet time, control circuit is progressively opened by valve or is opened completely, then the closure of closed earphone is broken, if now the external world has people and closed earphone user to talk, user just can hear.The shortcoming of this method is: as long as valve is not close completely, closed earphone has just become semi-enclosed earphone, makes just to lose the distinctive feature to the response of low-frequency component high-quality of closed earphone.
Therefore, need a kind ofly to be intended for improving one's methods of closed earphone, the method premised on the high-fidelity tonequality not affecting closed earphone, will solve the user of closed earphone and the extraneous problem exchanged simultaneously.
Summary of the invention
The user that the object of the invention is to solve closed earphone must take earphone when carrying out verbal communication with people around just can hear that the other side talks the problem of sound, a kind of extraneous sound source import system based on closed earphone is proposed, an extraneous source of sound import system is added, on the high-fidelity tonequality of closed earphone without any impact in closed earphone.
Based on an extraneous sound source import system for closed earphone, comprise capacitance key, modulator, demodulation by filter device, control circuit, microphone;
Capacitance key is positioned at closed headset earpiece, on the earphone outer covering corresponding with capacitance key, is provided with sensing chip, and by sensing chip operating capacitance button, generate induced signal after capacitance key is pressed, induced signal exports modulator to;
Microphone is positioned at earphone, gathers external sound signal, forms external sound audio signal, exports modulator to;
Modulator is positioned at closed earphone, modulator generates high-frequency carrier signal, induced signal is loaded on high-frequency carrier signal, carry out amplitude-modulating modulation, obtain high-frequency induction signal, the induced signal of frequency band, external sound audio signal, carrier signal are superimposed, and generate composite signal, composite signal exports the demodulation by filter device of playback equipment end to by microphone circuit;
The audio signal that playback equipment produces exports control circuit to;
Demodulation by filter device is provided with in playback equipment, demodulation by filter device comprises high pass filter, narrow band filter, low pass filter, high pass filter obtains composite signal medium-high frequency induced signal, narrow band filter obtains the carrier signal in composite signal, low pass filter obtains extraneous acoustic audio signal in composite signal, composite signal medium-high frequency induced signal is multiplied with carrier signal, obtain base band induced signal and frequency-doubled signal, input to low pass filter, obtain the induced signal of base band, export induced signal, external sound audio signal to control circuit;
The audio signal that playback equipment produces inputs to control circuit, is provided with multiplexer in control circuit, according to induced signal, and the acoustic audio signal in the audio signal that multiplexer selects output playback equipment playing or the external world;
Multiplexer will select the signal exported, and by the earphone cord of earphone, be sent to headset earpiece, the signal of telecommunication is reduced to acoustical signal.
The invention has the advantages that:
The present invention does not increase any cavity in earphone inside and introduces external sound, and this would not change the original cavity body structure of closed earphone, just well maintains the high-fidelity tonequality of closure earphone brilliance.User only needs to remove touch capacitor type button with hand, just by earphone by closed state, can change open state into, comes to link up with extraneous; Touch capacitor type button again, just by earphone by open state, can return to closed state, avoids extraneous bothering.
Accompanying drawing explanation
Fig. 1 is the existing method by introducing additionally hollow conduit in closed earphone inside.
Fig. 2 is the overall appearance of native system example 1, and the side outward appearance of one of them headset earpiece.
Fig. 3 is the physical structure of capacitance key, because LED is only the touching effect demonstrating capacitance key, does not have influence on the work of capacitance key, so do not draw.
Fig. 4 is the modulator logic diagram of native system example 1.
Fig. 5 is the demodulation by filter logic diagram of native system example 1.
Fig. 6 is the building-block of logic of native system example 1.
Fig. 7 is the building-block of logic of native system example 2.
Fig. 8 is 74LS153 chip pin figure.
In figure:
201-capacitance key 202-modulator 203-demodulation by filter device
204-control circuit 205-microphone
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The present invention is a kind of extraneous sound source import system based on closed earphone, can be obtained by following 2 specific embodiments.
Embodiment 1:
Based on an extraneous sound source import system for closed earphone, as shown in Figure 6, for the closed earphone not having microphone, comprise capacitance key 201, modulator 202, demodulation by filter device 203, control circuit 204, microphone 205;
Capacitance key 201 is positioned at closed headset earpiece, and the earphone outer covering correspondence on it is provided with sensing chip, and by sensing chip operating capacitance button 201, generate induced signal after capacitance key 201 is pressed, induced signal exports modulator 202 to;
Microphone 205 is positioned at earphone, gathers external sound signal, forms external sound audio signal, exports modulator 202 to;
Modulator 202 is positioned at closed earphone, modulator 202 generates high-frequency carrier signal, induced signal is loaded on high-frequency carrier signal, carry out amplitude-modulating modulation, obtain high-frequency induction signal, the induced signal of frequency band, external sound audio signal, carrier signal are superimposed, and generate composite signal, composite signal exports the demodulation by filter device 203 of playback equipment end to by microphone circuit; Now, the importing of extraneous voice signal to playback equipments such as mobile phones is completed.
The audio signal that playback equipment produces exports control circuit 204 to;
Demodulation by filter device 203 is provided with in playback equipment, demodulation by filter device 203 comprises high pass filter, narrow band filter, low pass filter, high pass filter obtains composite signal medium-high frequency induced signal, narrow band filter obtains the carrier signal in composite signal, low pass filter obtains extraneous acoustic audio signal in composite signal, composite signal medium-high frequency induced signal is multiplied with carrier signal, obtain base band induced signal and frequency-doubled signal, input to low pass filter, obtain the induced signal of base band, export induced signal, external sound audio signal to control circuit 204;
The audio signal that playback equipment produces inputs to control circuit 204, and be provided with multiplexer in control circuit 204, multiplexer can realize with 74LS153 chip, as shown in Figure 8.The audio signal that external sound audio signal, playback equipment are being play inputs to 1C1,1C0 of the DataInputs leads ends of multiplexer, induced signal inputs to the SELECT_A of the SelectInputs leads ends of multiplexer, the SELECT_B input low level of SelectInputs leads ends, the 1Y of DataOutputs leads ends is output.The process that then selectivity of actuated signal control two-way audio signal exports is: when induced signal is low level, multiplexer 1Y pin exports the signal of 1C0, namely exports the audio signal that playback equipment is being play; When induced signal is high level, multiplexer 1Y pin exports the signal of 1C1, namely exports extraneous acoustic audio signal.
Multiplexer will select the signal exported, and by the earphone cord of earphone, be sent to headset earpiece, complete electroacoustic conversion, the signal of telecommunication is reduced to acoustical signal by receiver.Now, extraneous voice signal is completed from playback equipments such as mobile phones to the importing of earphone inside.Thus, complete the whole importing process of extraneous voice signal to earphone inside.
The monnolithic case of the closed earphone described in embodiment 1, as shown in Figure 2, wherein left-hand component is the side diagram of a receiver of closed earphone, and profile of the present invention is the same with general closed earphone, does not have influence on the attractive in appearance of closed earphone and cavity body structure.In side view, in the shell side of closed earphone, be provided with the microphone MIC for receiving external sound signal, microphone 205 is built in after microphone MIC, and it is very little that microphone MIC can leave, and does not destroy the profile of earphone as far as possible.
On the shell of headset earpiece, be provided with capacitance key 201, capacitance key 201 is a small pieces capacitive buttons, and the shell of headset earpiece is provided with corresponding touch sensitive region, and be called sensing chip, sensing chip has indicated the position of capacitance key 201.The material of sensing chip adopts the highdensity non-conductive medium such as plastics or glass, the present invention selects the PMMA (polyethylene methacrylate) usually used in the electronic device, and its material is transparent, then built-in LED, when touching, LED lights, and plays effect more attractive in appearance.Because sensing chip can not contain any metal material, thus earphone outer covering spray paint in metal ingredient also not all right.If the shelling machine of closed earphone will have metallic luster, employ the ink containing metal ingredient, spray paint or electroplate, just enclose not with ink in sensing chip edge reservation one, spray paint or electroplate.
As shown in Figure 3, the induction electrode of capacitance key 201 is attached on the shell at sensing chip place capacitance key 201.In figure, be fixed between induction electrode and sensing chip region by glue, glue is without base material double faced adhesive tape, such as 3M468MP or NITTO500 etc.
The material of induction electrode, uses the Copper Foil, flexible circuit board (FPC) or the electro-conductive glass (ITO) that are widely used in circuit board.Induction electrode can be arbitrary shape, but is designed to square or circular effect is best.The size of induction electrode is relevant to the thickness of the sensing chip of induction electrode phase adhesion.The thickness of sensing chip will from induction electrode to outermost layer the gross thickness of actual contact-making surface.If space is enough, induction electrode is that larger effect is better.The table of comparisons of following sensing chip thickness and induction electrode minimum dimension:
| Sensing chip thickness | Induction electrode size |
| 1mm | 64mm 2 |
| 2mm | 100mm 2 |
| 3mm | 144mm 2 |
| 4mm | 225mm 2 |
In induction electrode, perforate carrys out mounted LED lamp, can cause the reduction of the area of induction electrode due to perforate, so induction electrode is when designing, its area will exclude the area removed due to perforate, namely calculates the area of annular.
MEMS (Micro-Electro-MechanicalSystems, MEMS (micro electro mechanical system)) microphone selected by microphone 205.MEMS microphone is made up of MEMS tiny current, micro-integrated converting circuit (amplifier), the operatic tunes and RF anti-noise circuit.The micro-capacitance pole head portion of MEMS is containing the silicon vibrating diaphragm and the silicon backplane that receive sound, the audio signal received directly can be transferred to micro-integrated circuit through MEMS tiny current by silicon vibrating diaphragm, the audio electrical signal of high resistant can be changed and zoom into the audio electrical signal of low-resistance by micro-integrated circuit, simultaneously through the filtering of RF anti-noise circuit.MEMS microphone is compared compared to the ECM (ElectretCondenserMicrophone, electret condenser microphone) being widely used in headset equipment has a lot of more excellent performance.First, the volume of MEMS microphone is less, can be embedded in very easily as in the electronic equipments such as closed earphone of the present invention.And RF (radiofrequency signal) noise and electromagnetic interference that MEMS microphone can also suppress Wi-Fi antenna and LCD clock signal etc. to be originated to cause greatly, impact other equipment in earphone to avoid microphone.What is more important, MEMS microphone is also outstanding to the rejection ability of white noise.
In the present embodiment, microphone 205 gathers extraneous voice signal, change the signal of telecommunication into, this signal of telecommunication is sent in playback equipment by the original Mike's circuit of closed earphone, to this voice signal in playback equipment, and the audio signal in original playback equipment, optionally export, deliver to the receiver of earphone, thus it is inner the transmission sound in the external world have been arrived closed earphone.Whole process will complete under an induction induced signal for user operation and the coordination of control circuit, and wherein induced signal changes from the action of user, and control circuit needs among playback equipment.The present embodiment 1 does not have any change for the profile of closed earphone.
The present embodiment needs Mike's circuit of multiplexing earphone to be sent in the control circuit of playback equipment by induced signal.Therefore, in order to this induced signal can be identified in control circuit, will before this induced signal be added with the voice signal of microphone, it is modulated with a high frequency carrier, induced signal is put into the frequency range higher than voice signal, frequency distinguishes mutually with the voice signal of microphone.
The present embodiment needs a modulator 201 at earphone end, realizes modulation function.
The present embodiment is re-used due to microphone lines, and the signal that microphone lines is sent to playback equipment is the composite signal of induced signal and voice signal.By this composite signal by high pass filter, leach the induced signal being in high frequency.Then, induced signal is delivered to demodulator, revert to original frequency from high frequency.
The present embodiment, by when debugging, also joins carrier wave among composite signal, thus carrier wave is sent to demodulator, carry out demodulation induced signal.Because modulation and demodulation use same carrier wave, with regard to do not exist because of demodulation carrier frequency and modulated carrier frequencies inconsistent and produce the interference signals such as difference frequency.The induced signal reduced after demodulation, can ensure comparatively high s/n ratio.
As shown in Figure 4, the induced signal that capacitance key 201 exports and the voice signal that microphone exports are the input signal of modulator 202 to modulator 202.Modulator 202 comprises Sine Function Generator, multiplier, adder, and Sine Function Generator generates the carrier signal of single-frequency, and induced signal is loaded on carrier wave by multiplier, carries out AM modulation (amplitude-modulating modulation), obtains the induced signal of frequency band.Signal after modulation, by adder, with voice signal and carrier signal superimposed, generate composite signal, finally composite signal outputted on microphone circuit, what realize microphone lines path channels is multiplexing.
Demodulation by filter device 203 as shown in Figure 5, demodulation by filter device 203 comprises high pass filter, narrow-band pass filter, low pass filter, composite signal, respectively by high pass filter, narrow band filter and low pass filter, carrys out the composite signal to input, carries out a point use process.Wherein, composite signal, through high pass filter, leaches the induced signal of frequency band; Narrow band filter leaches the carrier signal of single-frequency; Low pass filter leaches voice signal.Then, be multiplied with the induced signal on frequency band by carrier signal, the induced signal of base band and the signal of a frequency multiplication can be obtained, finally again by low pass filter, remove frequency-doubled signal, obtain the induced signal of base band.The induced signal of this base band, and the voice signal obtained before, separate from composite signal separately with regard to successful.
As shown in Figure 6, the overall logic of embodiment 1 is:
The rectangle that figure divides middle and upper part, represents earphone portion.The input signal of this part, has two, the induced signal that a touching being capacitance key 201 responds to user produces; Another gathers by microphone 205 audio signal that external sound generates.The output signal of this part is the voice signal of microphone 205 and the mixed signal of induced signal.
The touching operation of user, by the capacitance key 201 on earphone, change induced signal into, now induced signal is without modulation, is in base band.Extraneous voice signal is gathered by microphone 205.Induced signal to carrier-frequency range, obtain the induced signal of frequency band, and voice signal is superimposed through carrier modulation, forms mixed signal, outputs to the original microphone circuit of earphone.This mixed signal, through microphone circuit, is sent to playback equipment place.Now, the importing of extraneous voice signal to playback equipments such as mobile phones is completed.
The rectangle of figure lower middle portion, represents playback equipment end.The input signal of this part is the mixed signal that earphone end exports, and the voiceband data signal of playback equipment itself.Output signal can be sent to headset earpiece via earphone circuit and play.
Playback equipment uses demodulation by filter device, carries out filtering, the induced signal of frequency band, carrier signal and speech signal separation are come to the mixed signal inputted by Mike's circuit.Demodulation by filter device 203 carrier signal obtained, carries out solution mediation filtering to the induced signal of frequency band, thus obtains the induced signal of base band.Final demodulation by filter device 203 exports induced signal and the voice signal of base band.The control circuit of this embodiment 1 is single multiplexer.The induced signal of base band is as the control signal of multiplexer, and the audio signal play in voice signal and playback equipment, as the input signal of multiplexer.Under the control of induced signal, multiplexer optionally can export voice signal, or the audio signal of playback equipment.Multiplexer will select the signal exported, and by the earphone cord of earphone, be sent to headset earpiece, complete electroacoustic conversion, the signal of telecommunication is reduced to acoustical signal by receiver.Now, extraneous voice signal is completed from playback equipments such as mobile phones to the importing of earphone inside.Thus, complete the whole importing process of extraneous voice signal to earphone inside.
Embodiment 2:
A kind of extraneous sound source import system based on closed earphone, on the basis of embodiment 1, power amplifier is provided with after multiplexer, for amplifying the voice signal or the audio signal of playback equipment that multiplexer selectivity exports, after being amplified by signal by amplifier, then be sent to headset earpiece.
For guaranteeing power output, select the TDA2003 power amplifier that current output capability is very strong.
For dysaudia crowd, hearing aids is requisite carry-on equipment when exchanging with other people in life.But dysaudia crowd, when using hearing aids, being just equivalent to expose oneself has this physiological defect of dysaudia.Embodiment 3, relative to general hearing aids, just well solves this problem.Embodiment 3 is the combinations by earphone and playback equipment, realizes the function of hearing aids, therefore in use listening to the music with earphone as coexisting the same, can not expose the physiological defect of dysaudia crowd.Dysaudia crowd as normal person, can wear this example and exchanges with other people in life.
In the present invention, embed tactile sensor instead of common key-press in closed earphone side, allow the outward appearance of earphone keep level and smooth streamlined, want fashion attractive in appearance than use common key-press.And the strength that touch-key is required when pressing, be much smaller than common key-press, the Consumer's Experience used is more comfortable, particularly for the button on earphone, when user uses earphone time, be the particular location that can't see button, as long as touch-type button allowed user touch button, just can start the function of button.In addition, the button also than traditional is long the life-span of touch-key.
The touch-key related in the present invention, selects capacitance key.Capacitance key is equivalent to a little integrated circuit, can be placed on below any medium.When human body (finger) contact induction sheet time, because human body is equivalent to the electric capacity that one connects the earth, therefore can form an electric capacity between sensing chip and the earth, induced electricity capacity has a few pF usually to tens pF.Utilize this principle, build interlock circuit in outside, just according to the change of this capacitance, can detect whether there is human contact's sensing chip.
The present invention, by this capacitance key, under being placed on a speaker housings surface of closed earphone, touches premised on sensing chip with finger can allow user very easily.When user removes the outer surface touching closed earphone, the touching of user operates by capacitance key, changes an induced signal into, controls behavior and the state transitions of whole system.When earphone user is when listening to the music with earphone, can hand touch capacitor type button be used, cut off the signal source from playback equipments such as mobile phones, the extraneous voice signal that broadcasting microphone collects by headset earpiece, user can be exchanged with people at one's side; When earphone user does not want to be disturbed by outside, just touch a capacitance key again, what now play in headset earpiece is the audio signal of playback equipment, and user will continue music appreciating under the full-closed environment of closed earphone.
Claims (10)
1., based on an extraneous sound source import system for closed earphone, comprise capacitance key, modulator, demodulation by filter device, control circuit, microphone;
Capacitance key is positioned at closed headset earpiece, on the earphone outer covering corresponding with capacitance key, is provided with sensing chip, and by sensing chip operating capacitance button, generate induced signal after capacitance key is pressed, induced signal exports modulator to;
Microphone is positioned at earphone, gathers external sound signal, forms external sound audio signal, exports modulator to;
Modulator is positioned at closed earphone, modulator generates high-frequency carrier signal, induced signal is loaded on high-frequency carrier signal, carry out amplitude-modulating modulation, obtain high-frequency induction signal, the induced signal of frequency band, external sound audio signal, carrier signal are superimposed, and generate composite signal, composite signal exports the demodulation by filter device of playback equipment end to by microphone circuit;
The audio signal that playback equipment produces exports control circuit to;
Demodulation by filter device is provided with in playback equipment, demodulation by filter device comprises high pass filter, narrow band filter, low pass filter, high pass filter obtains composite signal medium-high frequency induced signal, narrow band filter obtains the carrier signal in composite signal, low pass filter obtains extraneous acoustic audio signal in composite signal, composite signal medium-high frequency induced signal is multiplied with carrier signal, obtain base band induced signal and frequency-doubled signal, input to low pass filter, obtain the induced signal of base band, export induced signal, external sound audio signal to control circuit;
The audio signal that playback equipment produces inputs to control circuit, is provided with multiplexer in control circuit, according to induced signal, and the acoustic audio signal in the audio signal that multiplexer selects output playback equipment playing or the external world;
Multiplexer will select the signal exported, and by the earphone cord of earphone, be sent to headset earpiece, the signal of telecommunication is reduced to acoustical signal.
2. a kind of extraneous sound source import system based on closed earphone according to claim 1, described multiplexer adopts 74LS153 chip, external sound audio signal, the audio signal that playback equipment is being play inputs to the 1C1 of the DataInputs leads ends of multiplexer, 1C0, induced signal inputs to the SELECT_A of the SelectInputs leads ends of multiplexer, the SELECT_B input low level of SelectInputs leads ends, the 1Y of DataOutputs leads ends is output, when induced signal is low level, multiplexer 1Y pin exports the signal of 1C0, namely the audio signal that playback equipment is being play is exported, when induced signal is high level, multiplexer 1Y pin exports the signal of 1C1, namely exports extraneous acoustic audio signal.
3. a kind of extraneous sound source import system based on closed earphone according to claim 1, the shell side of closed earphone, is provided with the microphone MIC for receiving external sound signal, after microphone is built in microphone MIC.
4. a kind of extraneous sound source import system based on closed earphone according to claim 1, described sensing chip adopts high density non-conductive medium.
5. a kind of extraneous sound source import system based on closed earphone according to claim 1, the built-in LED of described sensing chip, when touching sensing chip, LED lights.
6. a kind of extraneous sound source import system based on closed earphone according to claim 1, the induction electrode of described capacitance key is attached on sensing chip, is fixed by glue.
7. a kind of extraneous sound source import system based on closed earphone according to claim 1, described induction electrode is square or circular.
8. a kind of extraneous sound source import system based on closed earphone according to claim 1, described microphone adopts MEMS condenser microphone.
9. a kind of extraneous sound source import system based on closed earphone according to claim 1, described modulator comprises Sine Function Generator, multiplier, adder, Sine Function Generator generates the carrier signal of single-frequency, induced signal is loaded on carrier wave by multiplier, carry out amplitude-modulating modulation, obtain the induced signal of frequency band; Signal after modulation, by adder, with voice signal and carrier signal superimposed, generate composite signal.
10. a kind of extraneous sound source import system based on closed earphone according to claim 1, connects power amplifier after described multiplexer, after being amplified by signal, then is sent to headset earpiece by amplifier.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI639344B (en) | 2016-09-05 | 2018-10-21 | 塞席爾商元鼎音訊股份有限公司 | Sound collection equipment having function of answering incoming calls and control method of sound collection |
| CN112822585A (en) * | 2020-12-29 | 2021-05-18 | 歌尔科技有限公司 | Audio playing method, device and system of in-ear earphone |
| TWI735986B (en) * | 2019-10-24 | 2021-08-11 | 瑞昱半導體股份有限公司 | Sound receiving apparatus and method |
| CN114731464A (en) * | 2019-11-19 | 2022-07-08 | 华为技术有限公司 | Voice controlled ventilation for in-ear headphones |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070098190A1 (en) * | 2005-11-03 | 2007-05-03 | Samsung Electronics Co., Ltd. | Method and apparatus to control output power of a digital power amplifier optimized to a headphone and a portable audio player having the same |
| US20070281760A1 (en) * | 2006-05-23 | 2007-12-06 | Intermec Ip Corp. | Wireless, batteryless, audio communications device |
| US20120321097A1 (en) * | 2011-06-14 | 2012-12-20 | Vocollect, Inc. | Headset signal multiplexing system and method |
| CN203968327U (en) * | 2014-07-01 | 2014-11-26 | 深圳智我科技有限公司 | A kind of exempt from extract carry out low coverage dialogue earphone |
| CN104936058A (en) * | 2015-05-19 | 2015-09-23 | 吴东辉 | Acoustic feature earplug |
-
2015
- 2015-10-26 CN CN201510704916.XA patent/CN105245990A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070098190A1 (en) * | 2005-11-03 | 2007-05-03 | Samsung Electronics Co., Ltd. | Method and apparatus to control output power of a digital power amplifier optimized to a headphone and a portable audio player having the same |
| US20070281760A1 (en) * | 2006-05-23 | 2007-12-06 | Intermec Ip Corp. | Wireless, batteryless, audio communications device |
| US20120321097A1 (en) * | 2011-06-14 | 2012-12-20 | Vocollect, Inc. | Headset signal multiplexing system and method |
| CN203968327U (en) * | 2014-07-01 | 2014-11-26 | 深圳智我科技有限公司 | A kind of exempt from extract carry out low coverage dialogue earphone |
| CN104936058A (en) * | 2015-05-19 | 2015-09-23 | 吴东辉 | Acoustic feature earplug |
Non-Patent Citations (1)
| Title |
|---|
| 王兆滨等: "《MSP430系列单片机原理与工程设计实践》", 31 October 2014, 清华大学出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI639344B (en) | 2016-09-05 | 2018-10-21 | 塞席爾商元鼎音訊股份有限公司 | Sound collection equipment having function of answering incoming calls and control method of sound collection |
| TWI735986B (en) * | 2019-10-24 | 2021-08-11 | 瑞昱半導體股份有限公司 | Sound receiving apparatus and method |
| US11295719B2 (en) | 2019-10-24 | 2022-04-05 | Realtek Semiconductor Corporation | Sound receiving apparatus and method |
| CN114731464A (en) * | 2019-11-19 | 2022-07-08 | 华为技术有限公司 | Voice controlled ventilation for in-ear headphones |
| CN112822585A (en) * | 2020-12-29 | 2021-05-18 | 歌尔科技有限公司 | Audio playing method, device and system of in-ear earphone |
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