CN106535024A - Power amplifier circuit, control method and earphone system - Google Patents
Power amplifier circuit, control method and earphone system Download PDFInfo
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- CN106535024A CN106535024A CN201611222746.2A CN201611222746A CN106535024A CN 106535024 A CN106535024 A CN 106535024A CN 201611222746 A CN201611222746 A CN 201611222746A CN 106535024 A CN106535024 A CN 106535024A
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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
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
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Abstract
The invention discloses a power amplifier circuit, a control method and an earphone system. The power amplification circuit is used for driving an earphone, and comprises an earphone working parameter detection module used for detecting a working parameter of the earphone; a signal output module used for outputting signals to the earphone; and a signal processor used for determining whether an earphone leak exists according to the working parameter of the earphone detected by the earphone working parameter detection module, and changing the signals output to the earphone by the signal output module when the earphone leak exists. The power amplifier circuit provided by the invention can also achieve good sound effect and self-adapting effect in the case that a user wears the earphone improperly, and in addition, can also prompt that the user wears improperly and adjust a wearing angle and a wearing position via warning sound or by a mode that a playing terminal displays a leak detection result, and thus the earphone can achieve better use effect.
Description
Technical field
The present invention relates to earphone field, more particularly to a kind of power amplifier, control method and earphone system.
Background technology
Earphone is a kind of electricity-power-sonic transducer, is used for the equipment such as mobile phone, walkman.Earphone is typically and media player
Separate, coupled using a plug.Earphone has the advantages that portability, can listen to alone sound in the case where other people are not affected
It is happy.According to occupation mode, earphone can substantially be divided into open, semi open model and closed.Wherein closed earphone is (as pleasant
Formula earphone) full-closed structure is adopted, have the advantages that sound accurate positioning is clear.Also partially enclosed formula earphone possesses open
The sound field of earphone, still maintains the sound of high-quality while noise is completely cut off, in addition to the general user for appreciating music,
People to working under recording studio or noisy environment is also helpful.
The shortcoming of semi-enclosed, closed earphone is that the requirement to wearing state is higher.It is improper such as to wear, and sound leaks sternly
Weight, sense of hearing are deteriorated, i.e., described earphone produces leakage.
The content of the invention
It is an object of the present invention to propose a kind of power amplifier improved to earphone accommodation accuracy.
Further object is that proposing a kind of controlling party for improving the power amplifier to earphone accommodation accuracy
Method.
Another object of the present invention is to propose a kind of self adaptation earphone system for wearing improper adjustment output.
It is up to this purpose, on the one hand, the present invention is employed the following technical solutions：
A kind of power amplifier, for driving earphone, including：
Earphone running parameter detection module, for the running parameter of test earphone；
Signal output module, for headphone output signal；
According to the running parameter of the earphone of earphone running parameter detection module detection, signal processor, judges that earphone is
It is no to there is leakage, and change the signal that the signal output module is exported to earphone when earphone exists and leaks.
Preferably, the running parameter includes the frequency of the voltage at earphone two ends, the electric current of input earphone and/or the earphone
Ring.
Preferably, the earphone running parameter detection module includes the voltage detection unit for test earphone both end voltage
And for detecting the current detecting unit of input earphone electric current, the voltage detection unit and the current detecting unit with
The signal processor connection, the signal processor is for according to the voltage detection unit and the current detecting unit point
The voltage and current of the earphone not detected adjusts the signal that the signal output module is exported to earphone；And/or,
The frequency response detector unit that the earphone running parameter detection module is included mike and is connected with mike, it is described
Frequency response detector unit is used for detecting the frequency response of the earphone by the mike that the signal processor to be for according to the frequency
The frequency response for ringing the earphone of detector unit detection adjusts the signal that the signal output module is exported to earphone.
Preferably, the voltage detection unit include being separately provided for the test side that is directly connected to earphone.
Preferably, change the signal output module to the signal that earphone is exported include adjusting the signal output module to
The signal of earphone output sends extra alarm signal to earphone.
Preferably, the adjustment signal output module includes lifting low-frequency voltage to the signal that earphone is exported.
On the other hand, the present invention is employed the following technical solutions：
A kind of control method of power amplifier, methods described include judging that earphone whether there is according to the running parameter of earphone
Leakage, and change the signal to earphone output when earphone exists and leaks.
Preferably, earphone is judged with the presence or absence of leakage according to the running parameter of earphone, and is changed when earphone exists and leaks
Signal to earphone output is further included：
Signal to earphone output is adjusted according to the voltage and current of earphone；And/or,
Signal to earphone output is adjusted according to the frequency response of earphone.
Preferably, changing to the signal of earphone output includes adjusting to the signal of earphone output or sending additionally to earphone
Alarm signal.
Preferably, adjusting to the signal of earphone output includes lifting low-frequency voltage.
Another further aspect, the present invention are employed the following technical solutions：
A kind of earphone system, including earphone, also including power amplifier as above, the power amplifier and the earphone
Connection.
Preferably, the earphone includes the first positive pole and the first negative pole；
The test side of voltage detection unit includes voltage detecting positive pole and voltage detecting negative pole；
First positive pole is connected with the voltage detecting positive pole, and first negative pole is connected with the voltage detecting negative pole
Connect.
Preferably, the earphone includes the second positive pole and the second negative pole；
The signal output part of the signal output module includes signal positive pole and signal negative pole；
Second positive pole is connected with the signal positive pole, and second negative pole is connected with the signal negative pole.
Preferably, first positive pole, the first negative pole, the second positive pole and/or the second negative pole include pad, pcb board, flexibility
Circuit board, wire or shell fragment.
Preferably, the earphone also includes voice coil loudspeaker voice coil；
First positive pole and second positive pole connection, first negative pole are connected with second negative pole, the sound
One end of circle connects first positive pole or second positive pole, and the other end of the voice coil loudspeaker voice coil connects first negative pole or second
Negative pole；Or,
The first lead and the second lead are drawn in one end of the voice coil loudspeaker voice coil, and first lead connects first positive pole, institute
State the second lead and connect the second positive pole, the other end of the voice coil loudspeaker voice coil draws the 3rd lead and the 4th lead, and the 3rd lead connects
First negative pole is connect, the 4th lead connects second negative pole.
Preferably, the frequency response detection list that the earphone running parameter detection module is included mike and is connected with mike
Unit, the frequency response detector unit are used for detecting the frequency response of the earphone by the mike that the signal processor to be used for root
The frequency response of the earphone detected according to the frequency response detector unit adjusts the signal that the signal output module is exported to earphone；
Be provided with out acoustic aperture in the earphone, the mike be arranged at it is described go out acoustic aperture in.
Preferably, the earphone system also includes communication module, is connected with playback terminal communication, for playing eventually to described
End sends earphone working state signal.
Beneficial effects of the present invention are：
The signal processor of the power amplifier that the present invention is provided can be according to the ear of earphone running parameter detection module detection
The running parameter of machine judges earphone with the presence or absence of leakage, and change signal output module is exported to earphone when earphone exists and leaks
Signal, by adjust power amplifier output and filter, preferable audio can be also obtained in the case of user is worn improperly,
Adaptive effect is realized, in addition, can also show that the modes such as leak detection result point out user by caution sound, playback terminal
Wear improper and angle, position are worn in adjustment, so that earphone reaches more preferable using effect.
The work of the earphone that the control method of the power amplifier that the present invention is provided is detected according to earphone running parameter detection module
Make parameter and earphone is judged with the presence or absence of leakage, and change the letter that signal output module is exported to earphone when earphone exists and leaks
Number, by adjusting power amplifier output and filtering, preferable audio can be also obtained in the case of user is worn improperly, be realized
By caution sound, playback terminal, adaptive effect, in addition, can also show that the modes such as leak detection result point out user to wear
It is improper and adjustment wear angle, position so that earphone reaches more preferable using effect.
The earphone system that the present invention is provided adopts above-mentioned power amplifier, by adjusting power amplifier output and filtering, Neng Gou
User is also obtained preferable audio in the case of wearing improperly, or shows leak detection knot by caution sound, playback terminal
Fruit etc. mode point out user wear it is improper and adjustment wear angle, position so that earphone reaches more preferable using effect.
Description of the drawings
Fig. 1 is the connection diagram of existing power amplifier and speaker；
Fig. 2 is the connection diagram of the power amplifier that the embodiment of the present invention one is provided and earphone；
Fig. 3 is the connection diagram of the power amplifier that the embodiment of the present invention two is provided and earphone；
Fig. 4 is the frequency sound test result when earphone that the embodiment of the present invention two is provided is worn under different leak conditions；
Fig. 5 is the structure schematic diagram of the earphone that the embodiment of the present invention three is provided；
Fig. 6 is the structural representation of Fig. 5 middle ear machine electrodes；
Fig. 7 is the structural representation of the earphone voice coil loudspeaker voice coil that the embodiment of the present invention four is provided；
Fig. 8 is the Headphone structure schematic diagram that the embodiment of the present invention five is provided.
In figure, 1 ', signal processor；2 ', signal output module；3 ', current detecting unit；4 ', voltage detection unit；
5 ', variable gain amplifier；6 ', power amplifier；7 ', current sampling resistor；8 ', speaker；
1st, signal processor；2nd, signal output module；21st, signal positive pole；22nd, signal negative pole；3rd, current detecting unit；
31st, current detecting positive pole；32nd, current detecting negative pole；4th, voltage detection unit；41st, voltage detecting positive pole；42nd, voltage detecting is born
Pole；5th, variable gain amplifier；6th, power amplifier；7th, current sampling resistor；8th, earphone；81st, the first positive pole；82nd, first is negative
Pole；83rd, the second positive pole；84th, the second negative pole；85th, the first pad；86th, the second pad；87th, voice coil loudspeaker voice coil；871st, the first lead；872、
Second lead；873rd, the 3rd lead；874th, the 4th lead；88th, earphone fore shell；89th, earphone gum cover；9th, mike；10th, frequency response inspection
Survey unit.
Specific embodiment
Technical scheme is further illustrated below in conjunction with the accompanying drawings and by specific embodiment.
The invention provides power amplifier, for driving earphone, which includes：
Earphone running parameter detection module, for the running parameter of test earphone；
Signal output module, for headphone output signal；
According to the running parameter of the earphone of earphone running parameter detection module detection, signal processor, judges whether earphone is deposited
In leakage, and change the signal that signal output module is exported to earphone when earphone exists and leaks.
The signal processor of the power amplifier that the present invention is provided can be according to the ear of earphone running parameter detection module detection
The running parameter of machine judges earphone with the presence or absence of leakage, and change signal output module is exported to earphone when earphone exists and leaks
Signal, by adjust power amplifier output and filter, preferable audio can be also obtained in the case of user is worn improperly,
Or by caution sound, playback terminal show the mode such as leak detection result point out user wear improper and adjustment wear angle,
Position, so that earphone reaches more preferable using effect.
Wherein, running parameter is not specifically limited, and can embody the parameter of earphone working condition, for example, can be earphone two
The frequency response of the voltage, the electric current of input earphone and/or earphone at end.
Concrete structure and the control method of power amplifier are illustrated with reference to embodiment.
Embodiment one：
Intelligent power output amplification system is the system implemented non-linear, digital control in Audio Signal Processing and protect, and it is right to be used for
The electroacoustic transducer systems such as speaker are protected, and effectively extend its service life.Traditional intelligent power output amplification simplified electrical circuit diagram is such as
Shown in Fig. 1, signal output module 2 ' is exported acoustical signal to raising one's voice by variable gain amplifier 5 ' and power amplifier 6 '
Device 8 ' makes its sounding and works, and voltage detection unit 4 ', 3 ' purpose of current detecting unit are voltage, electric currents in detection circuit, and
According to the working condition of this results presumption speaker, subsequently by feedback of the information to signal processor.Signal processor 1 ' is by filter
Output signal is changed and is transmitted to signal output module 2 ' by the mode such as ripple or adjustment voltage.The audio frequency of final output to speaker
Signal can real-time adjustment, the purpose of speaker acoustical behavior and reliability dynamic equilibrium is reached with this.Current detecting unit 3 '
Two electrodes are connected in parallel to an output electrode of power amplifier 6 ' by current sampling resistor 7 '.The two of voltage detection unit 4 '
Individual electrode is respectively connected to two output electrodes of power amplifier 6 '.
Traditional intelligence power amplifier is limited to only have one group of electrode on loadspeaker structure in the application, and reality in the application cannot be accurate
True obtains Voltage Feedback of the speaker near end turn.In traditional intelligence power amplifier schematic diagram as shown in Figure 1, voltage
4 ' two electrode of detector unit and 6 ' two electrode joint (a, b) of power amplifier are to the resistance R mono- between the electrode of speaker 8 '
As for 0.3 Europe or so, this resistance R will be by as speaker internal resistance, and when the self-resistance of speaker 8 ' is less, resistance R is to electricity
The testing result of pressure detector unit 4 ' is produced a very large impact, and is ultimately resulted in intelligent power output amplification and speaker is detected and regulation performance change
Difference.
The present embodiment is improved to above-mentioned power amplifier and is applied to the driving to earphone.As shown in Fig. 2 with it is existing
Power amplifier it is similar, the power amplifier that the present embodiment is provided included signal processor 1 and connected with signal processor 1 respectively
Signal output module 2, current detecting unit 3 and the voltage detection unit 4 for connecing.Signal output module 2 is amplified by variable gain
Device 5 and power amplifier 6 export acoustical signal to earphone 8 and make its sounding and work, and current detecting unit 3 is used for test earphone
8 electric current, voltage detection unit 4 are used for the voltage of test earphone 8, and signal processor 1 can be according to voltage detection unit 4 and electric current
Output signal is changed and is passed by filtering or adjusting the modes such as voltage by 8 voltage and current of earphone that detector unit 3 is detected respectively
Transport to signal output module 2, the signal of final output to earphone 8 can real-time adjustment, 8 acoustical behavior of earphone and reliability are reached with this
The purpose of property dynamic equilibrium.Specifically, voltage across earphone, the electricity of inflow earphone when earphone has leakage in use
Stream will produce change, 8 voltage of earphone that signal processor is detected respectively according to voltage detection unit 4 and current detecting unit 3 and
Electric current judges earphone with the presence or absence of leakage, and according to leakiness changing the signal that signal output module is exported to earphone.When
During earphone No leakage, without the need for adjustment, when earphone has minor leakage, by way of lifting low-frequency voltage can reach earphone
Identical frequency response and tonequality under non-leak condition, when earphone is in serious leak state, it is impossible to effectively adjusted by input signal
During whole audio, extra alarm signal is sent to earphone, remind user's adjustment wearing position and angle.Wherein, signal output mould
The test side of the signal output part of block 2 and voltage detection unit 4 is separately provided, the test side of voltage detection unit can directly with
Earphone connects, and reduces impact of the loop resitance to voltage detection module so that voltage detection module can accurate test earphone two
The magnitude of voltage at end, greatly improves the accuracy of detection of power amplifier, and then improves the accuracy that power amplifier is adjusted to earphone, and
There is simple structure, easy to implement, good stability.
Specifically, as shown in Fig. 2 the signal output part of signal output module 2 includes signal positive pole 21 and signal negative pole 22,
Wherein, signal output module 2 is sequentially connected variable gain amplifier 5 and power amplifier 6, draws signal by power amplifier 6
Positive pole 21 and signal negative pole 22, signal positive pole 21 and signal negative pole 22 are directly connected to speaker 8 respectively.Voltage detection unit 4
Test side include that voltage detecting positive pole 41 and voltage detecting negative pole 42, voltage detecting positive pole 41 and voltage detecting negative pole 42 are distinguished
It is directly connected to earphone 8.The test side of current detecting unit 3 includes current detecting positive pole 31 and current detecting negative pole 32, electric current
Detection positive pole 31 and current detecting negative pole 32 are connected in parallel to signal positive pole 21 or signal negative pole 22 by current sampling resistor 7.
Embodiment two：
Active noise reduction earphone system includes earphone, mike and Dolby circuit.The noise letter of mike collection external environment condition
Number, Dolby circuit produces the de-noising signal of and opposite in phase identical with the noise signal amplitude according to noise signal and exports to ear
Machine, earphone receive de-noising signal sounding, cancel out each other with external noise, realize the effect of noise reduction.
The mems mikes for being originally used for noise reduction are assembled to aural headphone to go out at acoustic aperture, while to earphone input amplitude being
179mVrms swept-frequency signals, 20～20kHz of swept frequency range are just obtained the frequency response testing result that earphone sends signal.Fig. 4 is one
Frequency response curve test result of the money In-Ear Headphones under different leak conditions.In Fig. 4, curve C1 is without frequency under leak condition
Curve is rung, C2 is frequency response curve under slight leak condition, and C3 is frequency response curve under severe leakage state.By revealing shape to different
Knowable to state frequency response curve C2, C3 is compared with the frequency response curve C1 of non-leak condition, earphone is revealed such as appearance in use, then
Under the frequency range of 20～100Hz of frequency response curve, numerical value will be reduced, and fall is with amount of leakage into positive correlation；C3 frequency response curves are about
The summit of 3.5kHz is moved to about 3kHz.
Existing active noise reduction techniques are applied to into the real-time leak detection of earphone in the present embodiment, are surveyed by mike in real time
The frequency response change of amount earphone, and changed to be adjusted earphone according to frequency response.As shown in figure 3, earphone running parameter detection module
The frequency response detector unit 10 being connected including mike 9 and with mike 9, frequency response detector unit 10 are used for examining by mike 9
Survey the frequency response of earphone 8, the frequency response adjustment signal output of earphone 8 of the signal processor 1 for detecting according to frequency response detector unit 10
The signal that module 2 is exported to earphone 8.
Specifically, as shown in figure 3, the signal output part of signal output module 2 includes signal positive pole 21 and signal negative pole 22,
Wherein, signal output module 2 is sequentially connected variable gain amplifier 5 and power amplifier 6, draws signal by power amplifier 6
Positive pole 21 and signal negative pole 22, signal positive pole 21 and signal negative pole 22 are directly connected to speaker 8 respectively.Frequency response detector unit 10
It is connected with signal processor 1 and mike 9 respectively.Mike 9 is preferably provided at the going out at acoustic aperture of earphone 8.
Specifically, when earphone 8 is in state shown in C1 in Fig. 4, without the need for adjustment；Shown in C2 during slight leak condition, can
By lifting low-frequency voltage, earphone 8 is made to reach and identical frequency response and tonequality under non-leak condition；When earphone 8 is in shown in C3
Severe leakage state, it is impossible to when effectively adjusting audio by input signal, sends extra alarm signal to earphone, reminds user
Adjustment wearing position and angle.
It is, of course, understood that embodiment one and the power amplifier described in embodiment two can be integrated in a circuit,
I.e. two power amplifiers share a signal output module and signal processing module, the voltage, input earphone according to earphone two ends
Electric current and earphone frequency response realizing jointly the adjustment to earphone, further improve the accuracy of adjustment.
Embodiment three：
A kind of earphone system is present embodiments provided, which includes earphone 8 and the power amplifier as described in embodiment one.
Wherein, earphone 8 includes the first positive pole 81, the first negative pole 82, the second positive pole 83 and the second negative pole 84.Voltage detecting is just
Pole 41 is connected with the first positive pole 81, and voltage detecting negative pole 42 is connected with the first negative pole 82, and voltage detection unit 4 passes through the first positive pole
81 and the first negative pole 82 detect speaker 8 voltage.Signal positive pole 21 is connected with the second positive pole 83, and signal negative pole 22 is negative with second
Pole 84 connects.Signal output module 2 passes through the second positive pole 83 and the second negative pole 84 to 8 input signal of earphone to drive its sounding.
The setting form of first positive pole 81, the first negative pole 82, the second positive pole 83 and the second negative pole 84 on earphone 8 is not
Limit, can with but be not limited to include pad, pcb board, flexible PCB, wire or shell fragment, for ease of install, wire carry wiring
Terminal.First positive pole 81, the first negative pole 82 can be directly in parallel with the second positive pole 83 and the second negative pole 84, it is also possible to by earphone
8 voice coil loudspeaker voice coil is realized in parallel.
For example, as shown in figure 5, the first positive pole 81, the first negative pole 82, the second positive pole 83 and the second negative pole 84 are with pad
Form is arranged on a speaker.Specifically, including two pads, the first pad being respectively connected with voice coil loudspeaker voice coil one end of earphone 8
85 and the second pad 86 for being connected with the voice coil loudspeaker voice coil other end, the structure of the first pad 85 is as shown in fig. 6, its first end is first just
Pole 81, second end relative with its first end are the second positive pole 83.The structure of the second pad is similar with the first pad, its first end
For the first negative pole 82, second end relative with its first end is the second negative pole 84.First pad 85 and the second pad 86 are noted respectively
Mould to 8 back plastic parts of earphone, the first pad 85 exposes two regions at 8 back of earphone, one of region is first just
The region of pole 81, another region are the region of the second positive pole 83；Second pad 86 exposes two regions at 8 back of earphone, its
In region be the first negative pole 82 region, another region is the region of the second negative pole 84.
Further, earphone system may also include the communication module being connected with playback terminal communication, for playback terminal
Earphone working state signal is sent, for example, the result that voltage detection unit, current detecting unit are detected can be sent to broadcasting
The playback terminals such as device, mobile phone, user can realize the visualization of earphone working condition, user Ke Tong by downloading related APP
Cross playback terminal and check that earphone, in use with the presence or absence of leakage, adjusts wearing position and angle by real-time detection result
Degree, finally gives preferable audio.
Example IV：
A kind of earphone system is present embodiments provided, its structure is essentially identical with embodiment three, including earphone 8 and strictly according to the facts
Apply the power amplifier described in example one.Wherein, earphone includes the first positive pole 81, the first negative pole 82, the second positive pole 83 and the second negative pole
84.Voltage detecting positive pole 41 is connected with the first positive pole 81, and voltage detecting negative pole 42 is connected with the first negative pole 82, voltage detection unit
4 pass through the voltage that the first positive pole 81 and the first negative pole 82 detect speaker 8.Signal positive pole 21 is connected with the second positive pole 83, signal
Negative pole 22 is connected with the second negative pole 84.Signal output module 2 passes through the second positive pole 83 and the second negative pole 84 to 8 input signal of earphone
To drive its sounding.
Difference is that the first positive pole 81 is separately provided with the second positive pole 83 in the present embodiment, the first negative pole 82 and
Two negative poles 84 are also to be separately provided.As shown in fig. 7, the first lead 871 and the second lead 872 are drawn in one end of earphone voice coil loudspeaker voice coil 87,
The other end of voice coil loudspeaker voice coil 87 draws the 3rd lead 873 and the 4th lead 874.First lead 871 connects the first positive pole 81, the second lead
872 the second positive poles 83 of connection, the 3rd lead 873 connect the first negative pole 82, and the 4th lead 874 connects the second negative pole 84.Wherein,
One to the 4th lead can with but be not limited to be bright and beautiful silk thread or enamel-covered wire.
Embodiment five：
A kind of earphone system is present embodiments provided, which includes earphone 8 and the power amplifier as described in embodiment two.
Wherein, mike 9 is arranged on the going out in acoustic aperture of earphone.Mike 9 preferably adopts MEMS microphone.Specifically, such as
Shown in Fig. 8, earphone includes earphone fore shell 88 and is placed on the earphone gum cover 89 of 88 periphery of earphone fore shell, and mike 9 is arranged at ear
Machine fore shell 88 goes out in acoustic aperture, for the frequency response that test earphone goes out near acoustic aperture.When earphone is worn to human ear and normally wears
When, it is sealing state between earphone gum cover 89 and human ear auditory meatus.When between earphone gum cover 89 and human ear because wearing angle position etc.
When reason produces local leakage, the detection gained frequency response result of mike 9 accordingly changes.Without leakage, slight leakage and severe leakage
Cause the frequency response change of the detection gained of mike 9 as shown in Figure 4.In Fig. 4, C1 is that, without leak detection result, C2 reveals inspection for slight
Result is surveyed, C3 is severe leakage testing result.The frequency response of testing result real-time Transmission to example IV kind is detected mould by mike 9
Block, power amplifier described in embodiment two are accordingly adjusted to being input into voltage across earphone according to frequency response testing result, and adjustment mode is：
No leakage state is without the need for adjustment；Slight leakage only lifted low-frequency voltage value；Severe leakage points out user correct by caution sound
Wear.By obtaining preferable tonequality with upper type.
Similar, earphone system may also include the communication module being connected with playback terminal communication, for sending out to playback terminal
Ear sending machine working state signal, for example, can send the result that frequency response detector unit is detected to broadcastings such as player, mobile phones eventually
The visualization of earphone working condition can be realized by downloading related APP in end, user, and user can check ear by playback terminal
Machine with the presence or absence of leakage, adjusts wearing position and angle by real-time detection result in use, finally gives preferably
Audio.
The know-why of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention's
Principle, and limiting the scope of the invention can not be construed to by any way.Based on explanation herein, the technology of this area
Personnel associate other specific embodiments of the present invention by need not paying performing creative labour, these modes fall within
Within protection scope of the present invention.
Claims (10)
1. a kind of power amplifier, for driving earphone (8), it is characterised in that include：
Earphone running parameter detection module, for the running parameter of test earphone (8)；
Signal output module (2), for headphone output signal；
Signal processor (1), judges earphone according to the running parameter of the earphone (8) of earphone running parameter detection module detection
(8) with the presence or absence of leakage, and change the letter that the signal output module (2) is exported to earphone (8) when earphone (8) has leakage
Number.
2. power amplifier according to claim 1, it is characterised in that the running parameter includes the electricity at earphone (8) two ends
The frequency response of pressure, the electric current of input earphone (8) and/or the earphone (8).
3. power amplifier according to claim 1, it is characterised in that the earphone running parameter detection module include for
The voltage detection unit (4) of test earphone (8) both end voltage and the current detecting unit for detecting input earphone (8) electric current
(3), voltage detection unit (4) and the current detecting unit (3) are connected with the signal processor (1), the letter
Number processor (1) is for the earphone (8) that detected according to the voltage detection unit (4) and the current detecting unit (3) respectively
Voltage and current adjust signal output module (2) signal for exporting to earphone (8)；And/or,
The frequency response detector unit (10) that the earphone running parameter detection module is included mike (9) and is connected with mike,
Described frequency response detector unit (10) are used for detecting the frequency response of earphone (8), the signal processor by the mike (9)
(1) frequency response of the earphone (8) for being detected according to frequency response detector unit (10) adjusts signal output module (2) to ear
The signal that machine (8) is exported；
Preferably, described voltage detection unit (4) include being separately provided for the test side that is directly connected to earphone (8).
4. the power amplifier according to any one of claims 1 to 3, it is characterised in that change signal output module (2)
The signal exported to earphone (8) includes adjusting the signal that the signal output module (2) exported to earphone (8) or to earphone
(8) send extra alarm signal；
Preferably, adjustment signal output module (2) includes lifting low-frequency voltage to the signal that earphone (8) is exported.
5. a kind of control method of power amplifier, it is characterised in that methods described includes being judged according to the running parameter of earphone (8)
Earphone (8) is with the presence or absence of leakage, and changes to earphone (8) signal for exporting when earphone (8) has leakage.
6. control method according to claim 5, it is characterised in that earphone (8) is judged according to the running parameter of earphone (8)
With the presence or absence of leakage, and change to earphone (8) signal for exporting when earphone (8) has leakage and further include：
The signal that export is adjusted to earphone (8) according to the voltage and current of earphone (8)；And/or,
The signal that export is adjusted to earphone (8) according to the frequency response of earphone (8).
7. control method according to claim 5, it is characterised in that changing to earphone (8) signal for exporting includes adjustment
The signal that exports to earphone (8) sends extra alarm signal to earphone (8).
Preferably, adjusting to earphone (8) signal for exporting includes lifting low-frequency voltage.
8. a kind of earphone system, including earphone (8), it is characterised in that also include the work(as described in any one of Claims 1-4
Electric discharge road, the power amplifier are connected with the earphone (8).
9. earphone system according to claim 8, it is characterised in that
Described earphone (8) include the first positive pole (81) and the first negative pole (82)；
The test side of voltage detection unit (4) includes voltage detecting positive pole (41) and voltage detecting negative pole (42)；
First positive pole (81) are connected with voltage detecting positive pole (41), the first negative pole (82) and the voltage detecting
Negative pole (42) connects.
Preferably, described earphone (8) include the second positive pole (83) and the second negative pole (84)；
The signal output part of signal output module (2) includes signal positive pole (21) and signal negative pole (22)；
Second positive pole (83) are connected with signal positive pole (21), the second negative pole (84) and signal negative pole (22)
Connection.
Preferably, the first positive pole (81), the first negative pole (82), the second positive pole (83) and/or the second negative pole (84) include weldering
Disk, pcb board, flexible PCB, wire or shell fragment.
Preferably, the earphone also includes voice coil loudspeaker voice coil (87)；
First positive pole (81) and second positive pole (83) connect, the first negative pole (82) and the second negative pole (84)
Connection, the one end of voice coil loudspeaker voice coil (87) connect the first positive pole (81) or second positive pole (83), voice coil loudspeaker voice coil (87)
The other end connects the first negative pole (82) or the second negative pole (84)；Or,
Draw the first lead (871) and the second lead (872), described first lead (871) connection in the one end of voice coil loudspeaker voice coil (87)
First positive pole (81), described second lead (872) connect the second positive pole (83), and the other end of voice coil loudspeaker voice coil (87) draws the
Three leads (873) and the 4th lead (874), the 3rd lead (873) connect the first negative pole (82), the 4th lead
(874) the second negative pole (84) are connected.
10. earphone system according to claim 8, it is characterised in that the earphone running parameter detection module includes wheat
Gram wind and the frequency response detector unit being connected with mike, the frequency response detector unit are used for described by mike detection
The frequency response of earphone, the frequency response of earphone of the signal processor for being detected according to the frequency response detector unit adjust the signal
The signal that output module is exported to earphone；
Be provided with out acoustic aperture in the earphone, the mike be arranged at it is described go out acoustic aperture in.
Preferably, the earphone system also includes communication module, is connected with playback terminal communication, for sending out to the playback terminal
Ear sending machine working state signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016111070488 | 2016-12-06 | ||
| CN201611107048 | 2016-12-06 |
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| CN106535024A true CN106535024A (en) | 2017-03-22 |
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ID=58338938
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611222746.2A Pending CN106535024A (en) | 2016-12-06 | 2016-12-27 | Power amplifier circuit, control method and earphone system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106535024A (en) |
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