CN109379655A - A kind of earphone and a kind of earphone crosstalk eliminating method - Google Patents
A kind of earphone and a kind of earphone crosstalk eliminating method Download PDFInfo
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- CN109379655A CN109379655A CN201811276595.8A CN201811276595A CN109379655A CN 109379655 A CN109379655 A CN 109379655A CN 201811276595 A CN201811276595 A CN 201811276595A CN 109379655 A CN109379655 A CN 109379655A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/03—Connection circuits to selectively connect loudspeakers or headphones to amplifiers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Stereophonic System (AREA)
Abstract
The invention discloses a kind of earphones and a kind of earphone crosstalk eliminating method.The earphone includes: left channel loudspeaker and left channel transfer route, right channel loudspeaker and right channel transmission line, and: L channel subtracter and right channel subtracter, L channel subtracter is connected between left channel loudspeaker and left channel transfer route, right-channel signals are obtained simultaneously, the crosstalk signal that right-channel signals generate is eliminated from left channel signals, right channel subtracter is connected between right channel loudspeaker and right channel transmission line, left channel signals are obtained simultaneously, the crosstalk signal that left channel signals generate is eliminated from right-channel signals.By adding L channel subtracter and right channel subtracter in earphone, the crosstalk signal generated in left and right sound channels by the interference of another sound channel can be eliminated respectively, to improve the accuracy of left and right sound channels signal, keep the replaying effect of original audio, sound-filed simulation is restored, to listener with good spatial impression.
Description
Technical field
The present invention relates to ear phone technology field, in particular to a kind of earphone and a kind of earphone crosstalk eliminating method.
Background technique
Nowadays, dual-channel headphone is very common, because left and right sound track signals are different, thus the effect with component solid sound field
Fruit is loved by consumers.
However, in common dual-channel headphone, since the characteristic of tone frequency channel wire, circuit design limitation or electronic component influences,
The signal in left and right channel can inevitably introduce signal cross-talk, i.e., contain in the left multi-channel output signal of played in stereo equipment
More or less right channel signal, also (original stereo audio file is the sound field point for restoring practical playback environ-ment in right channel
Cloth, left and right channel signal can have necessary difference, these differences are to go back the key factor of original sound field).Therefore, left and right channel
This crosstalk can reduce left and right channel signal script difference and frequency spectrum constitute, first influence original audio signal weight
Effect is put, consumer's subjectivity sense of hearing is influenced, the remodeling of sound field is second influenced, influences perception of the listener to spatial impression.
Summary of the invention
The problem of in view of prior art earphone left and right sound channels signal cross-talk, proposes a kind of earphone of the invention and one kind
Earphone crosstalk eliminating method, to overcome the above problem or at least to be partially solved the above problem.
To achieve the goals above, present invention employs following technical solutions:
According to one aspect of the present invention, a kind of earphone is provided, comprising: left channel loudspeaker and left channel transfer line
Road and right channel loudspeaker and right channel transmission line, the signal of left channel transfer line transmission are left channel signals, right sound
The signal of road transmission line transmission is right-channel signals, the earphone further include:
L channel subtracter and right channel subtracter, L channel subtracter are connected to left channel loudspeaker and left channel transfer
Between route, while right-channel signals are obtained, the crosstalk signal that right-channel signals are generated is eliminated from left channel signals, right
Sound channel subtracter is connected between right channel loudspeaker and right channel transmission line, while obtaining left channel signals, by left sound
The crosstalk signal that road signal generates is eliminated from right-channel signals.
Optionally, L channel subtracter and/or right channel subtracter are made based on operational amplifier, further include matched electricity
Resistance and capacitor.
Optionally, left channel transfer route and right channel transmission line include tone frequency channel wire, and tone frequency channel wire is equipped with shielded layer.
Optionally, left channel transfer route and right channel transmission line further include: filtering Dolby circuit.
Optionally, earphone is wireless headset, further includes: wireless receiver and audio decoder, audio decoder will be wireless
The received digital signal of receiver is converted to analog signal, and is sent to left channel transfer route and right channel transmission line.
According to another aspect of the invention, a kind of earphone crosstalk eliminating method is provided, this method comprises:
After the transmission line sizing of earphone, test signal is input to the left channel transfer route and right sound of earphone respectively
Road transmission line, and the crosstalk signal generated in acquisition right channel transmission line and left channel transfer route is respectively corresponded, according to
The crosstalk signal of acquisition obtains right channel crosstalk transmission function and L channel crosstalk transmission function respectively；
Right channel subtracter is designed according to right channel crosstalk transmission function, right channel subtracter is connected to right channel transmission
Between route and right channel loudspeaker, L channel subtracter is designed according to L channel crosstalk transmission function, by L channel subtracter
It is connected between left channel transfer route and left channel loudspeaker.
Optionally, test signal is input to the left channel transfer route and right channel transmission line of earphone respectively, and is divided
The crosstalk signal generated in right channel transmission line and left channel transfer route Dui Ying not be acquired, specifically:
Test signal is successively individually entered into the left channel transfer route and right channel transmission line of earphone, and is existed respectively
The crosstalk signal that the input terminal of right channel loudspeaker and the input terminal acquisition of left channel loudspeaker generate.
Optionally, L channel subtracter and/or right channel subtracter are made based on operational amplifier, further include matched electricity
The parameter of resistance and capacitor, resistance and capacitor is determined by corresponding crosstalk transmission function.
Optionally, left channel transfer route and right channel transmission line include tone frequency channel wire, method further include: are tone frequency channel wire
Add shielded layer.
Optionally, method further includes the setting filtering Dolby circuit in left channel transfer route and right channel transmission line.
In conclusion the beneficial effects of the present invention are:
Increase L channel subtracter and right channel subtracter by separately designing in the left and right sound channels of earphone, thus point
The crosstalk signal that Xiao Chu not be generated by the interference of another sound channel in left and right sound channels, to improve the accuracy of left and right sound channels signal,
The replaying effect of original audio is kept, sound-filed simulation is restored, to listener with good spatial impression.
Detailed description of the invention
Fig. 1 is a kind of part composition signal of earphone that function is eliminated with crosstalk provided by one embodiment of the present invention
Figure；
Fig. 2 is the principle that a kind of earphone provided by one embodiment of the present invention eliminates crosstalk by left and right sound channels subtracter
Schematic diagram；
Fig. 3 is a kind of earphone crosstalk eliminating method flow diagram provided by one embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
In the description of the present application, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for describe the application and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present application, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in application.
Technical concept of the invention is: by separately designed in the left and right sound channels of earphone increase L channel subtracter and
Right channel subtracter, so that the crosstalk signal generated in left and right sound channels by the interference of another sound channel is eliminated respectively, left with raising,
The accuracy of right-channel signals keeps the replaying effect of original audio, restores sound-filed simulation, to listener with good spatial impression
By.
Fig. 1 is a kind of part composition signal of earphone that function is eliminated with crosstalk provided by one embodiment of the present invention
Figure, refering to what is shown in Fig. 1, the earphone be dual-channel headphone, comprising: left channel loudspeaker and for left channel loudspeaker provide audio believe
Number left channel transfer route and right channel loudspeaker and provide the right channel transmission line of audio signal for right channel loudspeaker
Road.Wherein, the signal of left channel transfer line transmission is left channel signals, it will be appreciated that ground, the left channel signals compare original left
Sound channel signal is also doped with crosstalk signal, and similarly, the signal of right channel transmission line transmission is right-channel signals, also adulterates
There is crosstalk signal.
Earphone further include: L channel subtracter and right channel subtracter.L channel subtracter is connected to left channel loudspeaker
Between left channel transfer route, L channel subtracter obtains right-channel signals simultaneously, the crosstalk that right-channel signals are generated
Signal is eliminated from left channel signals.Right channel subtracter is connected between right channel loudspeaker and right channel transmission line, together
When obtain left channel signals, the crosstalk signal that left channel signals are generated is eliminated from right-channel signals.
By above structure, in the earphone of the application, the left and right sound channels subtracter added is transmitting this channel audio letter
Number while, the audio signal in another channel transfer route is also obtained respectively, so that the crosstalk signal generated accordingly is deleted
It removes, to maintain the accuracy of audio signal in this sound channel, to guarantee the pure sense of hearing of original music signal, and guarantees auditory psychology
Spatial impression on.
Fig. 2 shows the principles that earphone shown in Fig. 1 eliminates crosstalk, with reference to shown in Fig. 2:
In actual work, pure left and right sound channels SL, SR are passed from left channel transfer route (1) and right channel earphone respectively
Defeated route (2) input.Period, there are cross talk effect (3), comprising: tone frequency channel wire material influences, and leads to the shielding of left and right sound channels signal
Effect is variant to introduce crosstalk signal；And sound line passes through when passing through electronic circuit, due to inductance capacitor element
Presence and the cross talk effect that introduces of fabric swatch design problem and the problems such as circuit design defect.Therefore, by crosstalk shown in (3)
After effect, audio signal becomes SL+S2 and SR+S1 (S2 be crosstalk signal with S1) from SL and SR respectively.
The cross talk effect transmission function that right channel transmission line (1) is subject to is indicated with G1, and left channel transfer line is indicated with G2
(for transmission function G1 and G2 by the structure determination of transmission line, transmission line is fixed for cross talk effect transmission function (2) that road (2) is subject to
After type, then transmission function determines), then, left channel transfer route (1) is effectively outputed to L channel by L channel subtracter (6)
The signal of loudspeaker (8) are as follows: Out L=(SL+S2)-G2* (SR+S1) ≈ SL is similarly output to right channel loudspeaker (9)
Signal are as follows: OutR=(SR+S1)-G1* (SL+S2) ≈ SR, so far, the crosstalk signal of earphone left and right acoustic channels is eliminated, earphone
The signal of loudspeaker actual play keeps identical as the original audio file that player exports, and guarantees user's sense of hearing.
In the present embodiment, L channel subtracter and/or right channel subtracter are made based on operational amplifier, further include
The resistance and capacitor matched.Certainly, other electronic components be may be based on and constitute left and right sound channels subtracter, as long as string can be met
The feature for disturbing signal eliminates corresponding crosstalk signal, and details are not described herein.
In addition, in order to further decrease left and right sound channels cross-interference issue, improving sound in some embodiments of the present application
Reduction degree guarantees the spatial impression of music, the left channel transfer route tone frequency channel wire and the equal tone frequency channel wire of right channel transmission line of the application
In, it is additionally provided with shielded layer, to further decrease the cross-interference issue of left and right sound channels transmission line.
In some embodiments of the present application, in addition to function is eliminated in crosstalk, earphone also has filtering decrease of noise functions, to guarantee
Sound quality improves the auditory perception of user.Specifically, in the left channel transfer route of earphone and right channel transmission line
In, it is additionally provided with filtering Dolby circuit, by the filtering Dolby circuit, to filter out other interference and noise.In channel transfer route
Interior filtering Dolby circuit realizes the filtering noise reduction of analog audio signal.
In some embodiments of the present application, which can be common wired earphone, alternatively, the earphone may be
Wireless headset more convenient to use.When the earphone of the application is wireless headset, further includes: wireless receiver and audio decoder
The received digital signal of wireless receiver is converted to analog signal by device, audio decoder, and is sent to left channel transfer route
Before audio decoder, digital squelch circuit can be also designed on this basis with right channel transmission line, it is wireless to filter out
The interference signal that receive process introduce.
Fig. 3 shows the flow diagram of the application earphone crosstalk eliminating method, as shown in figure 3, this method comprises:
Step S110: after the transmission line sizing of earphone, test signal is input to the left channel transfer of earphone respectively
Route and right channel transmission line, and respectively correspond the crosstalk generated in acquisition right channel transmission line and left channel transfer route
Signal obtains right channel crosstalk transmission function G1 and L channel crosstalk transmission function G2 according to the crosstalk signal of acquisition respectively.
Step S120: right channel subtracter is designed according to right channel crosstalk transmission function G1, right channel subtracter is connected
Between right channel transmission line and right channel loudspeaker, L channel subtracter is designed according to L channel crosstalk transmission function G2,
L channel subtracter is connected between left channel transfer route and left channel loudspeaker.
In the present embodiment, test signal is input to the left channel transfer route and right channel transmission line of earphone respectively
Road, and the crosstalk signal generated in acquisition right channel transmission line and left channel transfer route is respectively corresponded, specifically:
Test signal is successively individually entered into the left channel transfer route and right channel transmission line of earphone, and is existed respectively
The crosstalk signal that the input terminal of right channel loudspeaker and the input terminal acquisition of left channel loudspeaker generate.That is: right sound is measured first
Transmission function G1 of the road transmission line by crosstalk to left channel transfer route (2) input test signal S, while obtaining right sound
The response S1 of road transmission line (2), because ideally, should not have sound in the right channel transmission line (2) without input
It answers, therefore response S1 is crosstalk signal, to obtain the crosstalk signal transmission function of right channel transmission lineTogether
Reason, measures the crosstalk signal transmission function of left channel transfer route
Right channel subtracter (7) are made according to the transmission function G1 of right channel transmission line, according to left channel transfer route
Transmission function G2 make L channel subtracter (6), and be added in earphone.Then earphone in actual work, is effectively outputed to a left side
The signal of channel loudspeaker (8) are as follows: Out L=(SL+S2)-G2* (SR+S1) ≈ SL is similarly output to right channel loudspeaker
(9) signal are as follows: OutR=(SR+S1)-G1* (SL+S2) ≈ SR, so far, the crosstalk signal of earphone left and right acoustic channels is eliminated,
The signal of earphone speaker actual play keeps identical as the original audio file that player exports, and guarantees user's sense of hearing.
In some embodiments of the application method, L channel subtracter and/or right channel are made based on operational amplifier
Subtracter, further includes matched resistance and capacitor in subtracter, and the parameter of resistance and capacitor is true by corresponding crosstalk transmission function
It is fixed.
In some embodiments of the application method, left channel transfer route and right channel transmission line include audio
Line, this method further include: shielded layer is added for tone frequency channel wire, to further decrease interchannel crosstalk.
In some embodiments of the application method, further include, in left channel transfer route and right channel transmission line
Setting filtering Dolby circuit improves the fidelity of audio signal to realize the filtering noise reduction of analog audio signal, improves sound quality.
The earphone of the application infects removing method and both can be applied in wired earphone, can also be applied in wireless headset, with
Eliminate the cross talk problem of dual-channel headphone.
By above-mentioned earphone disclosed in the present application and earphone crosstalk eliminating method, dual-channel headphone can be eliminated well
The problem of interior interchannel crosstalk, improves the sense of hearing and auditory psychology of listener to guarantee the degree of purity of original music signal
On spatial impression, improve user experience.
The above description is merely a specific embodiment, under above-mentioned introduction of the invention, those skilled in the art
Other improvement or deformation can be carried out on the basis of the above embodiments.It will be understood by those skilled in the art that above-mentioned tool
Body description only preferably explains that the purpose of the present invention, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of earphone, comprising: left channel loudspeaker and left channel transfer route and right channel loudspeaker and right channel transmission
Route, the signal of the left channel transfer line transmission are left channel signals, and the signal of the right channel transmission line transmission is
Right-channel signals, which is characterized in that the earphone further include:
L channel subtracter and right channel subtracter, the L channel subtracter are connected to left channel loudspeaker and left channel transfer
Between route, while the right-channel signals are obtained, the crosstalk signal that right-channel signals are generated is from the left channel signals
Middle elimination, the right channel subtracter is connected between right channel loudspeaker and right channel transmission line, while obtaining the left side
Sound channel signal eliminates the crosstalk signal that left channel signals generate from the right-channel signals.
2. earphone according to claim 1, which is characterized in that the L channel subtracter and/or the right channel subtraction
Device is made based on operational amplifier, further includes matched resistance and capacitor.
3. earphone according to claim 1, which is characterized in that the left channel transfer route and the right channel transmission line
Road includes tone frequency channel wire, and the tone frequency channel wire is equipped with shielded layer.
4. earphone according to claim 1, which is characterized in that the left channel transfer route and the right channel transmission line
Road further include: filtering Dolby circuit.
5. earphone according to claim 1-4, which is characterized in that the earphone is wireless headset, further includes: nothing
The received digital signal of the wireless receiver is converted to simulation letter by line receiver and audio decoder, the audio decoder
Number, and it is sent to the left channel transfer route and the right channel transmission line.
6. a kind of earphone crosstalk eliminating method, which is characterized in that this method comprises:
After the transmission line sizing of earphone, left channel transfer route and right channel biography that signal is input to earphone will be tested respectively
Defeated route, and the crosstalk signal generated in acquisition right channel transmission line and left channel transfer route is respectively corresponded, according to acquisition
Crosstalk signal obtain right channel crosstalk transmission function and L channel crosstalk transmission function respectively；
Right channel subtracter is designed according to right channel crosstalk transmission function, right channel subtracter is connected to right channel transmission line
Between right channel loudspeaker, L channel subtracter is designed according to L channel crosstalk transmission function, L channel subtracter is connected
Between left channel transfer route and left channel loudspeaker.
7. earphone crosstalk eliminating method according to claim 6, which is characterized in that described to be respectively input to test signal
The left channel transfer route and right channel transmission line of earphone, and respectively correspond acquisition right channel transmission line and left channel transfer
The crosstalk signal generated in route, specifically:
Test signal is successively individually entered to the left channel transfer route and right channel transmission line of earphone, and respectively in right sound
The crosstalk signal that the input terminal of road loudspeaker and the input terminal acquisition of left channel loudspeaker generate.
8. earphone crosstalk eliminating method according to claim 6, which is characterized in that the L channel subtracter and/or institute
It states right channel subtracter to be made based on operational amplifier, further includes matched resistance and capacitor, the parameter of the resistance and capacitor
It is determined by corresponding crosstalk transmission function.
9. earphone crosstalk eliminating method according to claim 6, which is characterized in that the left channel transfer route and described
Right channel transmission line includes tone frequency channel wire, the method also includes: shielded layer is added for the tone frequency channel wire.
10. according to the described in any item earphone crosstalk eliminating methods of claim 6-9, which is characterized in that the method also includes,
The setting filtering Dolby circuit in the left channel transfer route and the right channel transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811276595.8A CN109379655A (en) | 2018-10-30 | 2018-10-30 | A kind of earphone and a kind of earphone crosstalk eliminating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811276595.8A CN109379655A (en) | 2018-10-30 | 2018-10-30 | A kind of earphone and a kind of earphone crosstalk eliminating method |
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| CN109379655A true CN109379655A (en) | 2019-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111835386A (en) * | 2019-04-22 | 2020-10-27 | 恩智浦有限公司 | Wireless communication device |
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