CN109257676A - A kind of Bluetooth earphone system based on audio distortion compensation technique - Google Patents
A kind of Bluetooth earphone system based on audio distortion compensation technique Download PDFInfo
- Publication number
- CN109257676A CN109257676A CN201811286079.3A CN201811286079A CN109257676A CN 109257676 A CN109257676 A CN 109257676A CN 201811286079 A CN201811286079 A CN 201811286079A CN 109257676 A CN109257676 A CN 109257676A
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- electric signal
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- loudspeaker
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- 238000000034 method Methods 0.000 title claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 44
- 229910052742 iron Inorganic materials 0.000 claims description 22
- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 2
- 230000004044 response Effects 0.000 description 28
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 241001062009 Indigofera Species 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention discloses a kind of Bluetooth earphone system based on audio distortion compensation technique, including bluetooth receiving module, the bluetooth receiving module receives the digital signal of audio, converts digital signals into analog signal；Active crossover module, the Active crossover module are connect with bluetooth receiving module, and analog signal is resolved into high sound electric signal, high pitch electric signal, middle pitch electric signal and bass electric signal by the Active crossover module；Several loudspeakers are separately connected Active crossover module to issue the sound of different frequency sections according to the high sound electric signal, high pitch electric signal, middle pitch electric signal and bass electric signal；Several physical frequencies adjustment portions are separately connected respective speaker rear end and the audible frequency for controlling loudspeaker.Its causes of sound distortion that can compensate for bluetooth headset realizes the output of bluetooth headset high-quality sound.
Description
Technical field
The present invention relates to bluetooth headset technical fields, and in particular to a kind of bluetooth headset based on audio distortion compensation technique
System.
Background technique
Bluetooth headset exactly applies Bluetooth technology in hands-free headsets, allows user that can exempt leading for irritating electric wire
It stumbles, the easily call in various ways of comfortable ground.It has been always the good of Mobile Commerce race raising efficiency since bluetooth headset comes out
Tool.Currently, as some mobile phones cancel 3.5 earphone interfaces, and to conveniently pursuing, people are increasingly keen to indigo plant
Tooth earphone.
However, Bluetooth transmission process, easily causes audio signal loss and distortion；And not due to Bluetooth circuit driving capability
Foot, this is just further exacerbated by causes of sound distortion, cannot achieve high-quality HIFI sound property.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of Bluetooth earphone system based on audio distortion compensation technique,
It can compensate for the causes of sound distortion of bluetooth headset, realize the output of bluetooth headset high-quality sound.
In order to solve the above-mentioned technical problems, the present invention provides a kind of bluetooth headset systems based on audio distortion compensation technique
System, including bluetooth receiving module, the bluetooth receiving module receive the digital signal of audio, convert digital signals into simulation letter
Number；Active crossover module, the Active crossover module are connect with bluetooth receiving module, and the Active crossover module is by analog signal
Resolve into high sound electric signal, high pitch electric signal, middle pitch electric signal and bass electric signal；Several loudspeakers, are separately connected electricity
Sub- frequency division module is to issue different frequencies according to the high sound electric signal, high pitch electric signal, middle pitch electric signal and bass electric signal
The sound of rate section；Several physical frequencies adjustment portions are separately connected respective speaker rear end and the sounding for controlling loudspeaker
Frequency.
Preferably, the physical frequencies adjustment portion is acoustic waveguide tube, can be changed by the acoustic waveguide tube of different length
Become the upper limit of the audible frequency of corresponding loudspeaker.
Preferably, the bluetooth receiving module and the Active crossover intermodule are provided with signal amplification module, institute
Analog signal of the signal amplification module for exporting the bluetooth receiving module is stated to amplify.
Preferably, being dynamic iron pole high pitch loudspeaker with the loudspeaker that the high sound electric signal is correspondingly arranged, with institute
Stating the loudspeaker that high pitch electric signal is correspondingly arranged is dynamic iron high pitch loudspeaker.
Preferably, being dynamic iron Squawker, the dynamic iron with the loudspeaker that the middle pitch electric signal is correspondingly arranged
There are two Squawker tools.
Preferably, being moving-coil woofer with the loudspeaker that the bass electric signal is correspondingly arranged.
Preferably, being provided with the resistance for adjusting intensity of phonation in the Active crossover module and being sent out for adjusting
The capacitor of acoustic frequency lower limit.
Compared with prior art, the beneficial effects of the present invention are:
1, analog signal is resolved into high sound electric signal, high pitch electric signal, middle pitch by Active crossover module by the present invention
Electric signal and bass electric signal, and physics frequency adjustment is set in every group of signal corresponding loudspeaker rear end, pass through electronics point
Frequency modulation section and physical frequencies adjust collective effect, realize and compensate the frequency dividing of earphone Frequency Response, and final acquisition frequency response curve is flat
It is sliding, and meet human ear equal loudness contour, realize high-quality HIFI sound.
2, the present invention solves audio signal loss and aberration problems caused by Bluetooth transmission process, realizes earphone high-quality sound
Sound output, provides better hearing enjoying.
Detailed description of the invention
It, below will be in embodiment technical description for the clearer technical solution illustrated in technology of the embodiment of the present invention
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the invention
Example is applied, for those of ordinary skill in the art, without creative efforts, additionally it is possible to according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the frequency response curve of different pronunciation units, wherein A is moving-coil woofer sounding frequency response curve, and B is
Iron Squawker sounding frequency response curve, C are dynamic iron high pitch loudspeaker sounding frequency response curve, and D is dynamic iron pole high pitch loudspeaker hair
Sound frequency response curve；
Fig. 3 is the Frequency Response of conventional Bluetooth earphone system；
Fig. 4 is compensated curve figure；
Fig. 5 is the frequency response curve that finally obtains after divided compensation；
Fig. 6 is the frequency response schematic diagram that high pitch characteristic is promoted.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment
Shown in referring to Fig.1, the invention discloses a kind of Bluetooth earphone systems based on audio distortion compensation technique, including indigo plant
Tooth receiving module, Active crossover module, several loudspeakers and several physical frequencies adjustment portions.
Wherein, bluetooth receiving module receives the digital signal of audio, converts digital signals into analog signal.
Active crossover module is connect with bluetooth receiving module, and analog signal is resolved into high sound telecommunications by Active crossover module
Number, high pitch electric signal, middle pitch electric signal and bass electric signal.
The resistance for adjusting intensity of phonation and the electricity for adjusting audible frequency lower limit are provided in Active crossover module
Hold.Resistance can limit size of current, determine sound integral strength.Capacitor capacitive reactance is Z=1/j ω C, as frequency increases,
Capacitive reactance can be gradually reduced, and therefore, capacitor determines the low-frequency minimum of sounding.Fig. 2 is the frequency response curve of different pronunciation units, wherein A
For moving-coil woofer sounding frequency response curve, B is dynamic iron Squawker sounding frequency response curve, and C is dynamic iron high pitch loudspeaker
Sounding frequency response curve, D are dynamic iron pole high pitch loudspeaker sounding frequency response curve.For moving iron Squawker sounding frequency response curve B,
Capacitor becomes smaller, and corresponding change occurs for the low-frequency minimum of frequency response curve, and low-frequency minimum becomes B1, i.e. Active crossover module can control
Intensity of phonation processed and lower-frequency limit.
Several loudspeakers, be separately connected Active crossover module with according to the high sound electric signal, high pitch electric signal, in
Sound electric signal and bass electric signal issue the sound of different frequency sections.
Several physical frequencies adjustment portions are separately connected respective speaker rear end and the sounding frequency for controlling loudspeaker
Rate.
Physical frequencies adjustment portion is acoustic waveguide tube, can change the hair of corresponding loudspeaker by the acoustic waveguide tube of different length
The upper limit of acoustic frequency.Different conduits, acoustic impedance is different, and therefore, the conduit of different length is different to high sound attenuation degree,
Therefore, the unit pronouncing frequency upper limit can change by conduit, conduit shortens, and the audible frequency upper limit becomes larger.As shown in Fig. 2, right
In dynamic iron Squawker sounding frequency response curve B, conduit shortens, and the audible frequency upper limit becomes larger, and upper frequency limit becomes B2。
Bluetooth receiving module and Active crossover intermodule are provided with signal amplification module, and signal amplification module is used for bluetooth
The analog signal amplification of receiving module output.Since Active crossover module will drive multiple loudspeaker sounding, this just needs its tool
Have compared with large-drive-current, and the supply voltage of bluetooth receiving module is lower, bluetooth can then be received mould by signal amplification module at this time
The analog signal amplification of block output, sufficiently large driving current is provided for Active crossover module.
It is dynamic iron pole high pitch loudspeaker with the loudspeaker that high sound electric signal is correspondingly arranged, is correspondingly arranged with high pitch electric signal
Loudspeaker be dynamic iron high pitch loudspeaker.The sound frequency range issued with the loudspeaker that high sound electric signal is correspondingly arranged is 5120-
20000HZ；The sound frequency range issued with the loudspeaker that high pitch electric signal is correspondingly arranged is 2560-5120HZ.
It is dynamic iron Squawker with the loudspeaker that middle pitch electric signal is correspondingly arranged, moves there are two iron Squawker tools.
Since the signal of middle pitch part is more, for the stabilization for enhancing middle pitch sounding, that is, two dynamic iron Squawkers are selected.With middle pitch electricity
The sound frequency range that the loudspeaker that signal is correspondingly arranged issues is 160-1280HZ.
It is moving-coil woofer with the loudspeaker that bass electric signal is correspondingly arranged.Moving-coil speaker and moving iron loud speaker
Mixed Design had not only been able to achieve the preferable Frequency Response output of bluetooth headset, but also can reduce production cost.With bass electric signal pair
The loudspeaker sounding frequency range that should be arranged is 20-160HZ.
In traditional Bluetooth earphone system, bluetooth receiving module obtains digital signal, is successively converted into simulating later again
Electric signal and vibration acoustical signal, and in conversion process, certain distortion occurs for Frequency Response.Fig. 3 is conventional Bluetooth earphone system
Frequency dividing compensation is not added herein for the Frequency Response of system.Fig. 4 is compensated curve figure, which passes through in Active crossover module
Resistance and capacitor and physical frequencies adjustment portion in acoustic waveguide tube synergistic effect realize.Fig. 5 be divided compensation after most
The frequency response curve obtained eventually.Fig. 3 curve and Fig. 4 Curves compilation obtain Fig. 5 curve, i.e., after frequency dividing compensation, realize bluetooth-electro-acoustic
The whole system of composition is finally pronounced.Such as Fig. 5 curve smoothing, and meet human ear equal loudness contour, realizes high-quality HIFI sound.
Decayed since bluetooth will cause high sound, electro-acoustic part needs to be promoted pole treble response, by suitably increasing
Extremely high frequency unit series capacitance in big electronic frequency divider, and shorten pole high pitch loudspeaker as far as possible to acoustic waveguide tube length, frequency
Extremely high frequency of the rate after 8k, which responds, to be improved, this can make up for it sound loss in detail caused by Bluetooth transmission, raising sound
Sound presence and reduction degree.After the adjustment of high pitch characteristic, frequency response is improved after 8k, and entire earphone, frequency response curve is smooth,
Senior middle school's low frequency equalization has HIFI quality.Fig. 6 is the frequency response schematic diagram that high pitch characteristic is promoted, wherein E is that original frequency response is special
Property figure, E1After shortening pole high pitch loudspeaker to acoustic waveguide tube length, Frequency Response figure obtained.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to consistent with principles disclosed herein and novel point
Widest scope.
Claims (7)
1. a kind of Bluetooth earphone system based on audio distortion compensation technique, which is characterized in that including
Bluetooth receiving module, the bluetooth receiving module receive the digital signal of audio, convert digital signals into analog signal；
Active crossover module, the Active crossover module are connect with bluetooth receiving module, and the Active crossover module believes simulation
Number resolve into high sound electric signal, high pitch electric signal, middle pitch electric signal and bass electric signal；
Several loudspeakers are separately connected Active crossover module according to the high sound electric signal, high pitch electric signal, middle pitch electricity
Signal and bass electric signal issue the sound of different frequency sections；
Several physical frequencies adjustment portions are separately connected respective speaker rear end and the audible frequency for controlling loudspeaker.
2. the Bluetooth earphone system as described in claim 1 based on audio distortion compensation technique, which is characterized in that the physics
Frequency adjustment is acoustic waveguide tube, can change the upper of the audible frequency of corresponding loudspeaker by the acoustic waveguide tube of different length
Limit.
3. the Bluetooth earphone system as described in claim 1 based on audio distortion compensation technique, which is characterized in that the bluetooth
Receiving module and the Active crossover intermodule are provided with signal amplification module, and the signal amplification module is used for the bluetooth
The analog signal amplification of receiving module output.
4. the Bluetooth earphone system as described in claim 1 based on audio distortion compensation technique, which is characterized in that with the pole
The loudspeaker that high pitch electric signal is correspondingly arranged is dynamic iron pole high pitch loudspeaker, the loudspeaker being correspondingly arranged with the high pitch electric signal
To move iron high pitch loudspeaker.
5. the Bluetooth earphone system as described in claim 1 based on audio distortion compensation technique, which is characterized in that in described
The loudspeaker that sound electric signal is correspondingly arranged is dynamic iron Squawker, and there are two the dynamic iron Squawker tools.
6. the Bluetooth earphone system as described in claim 1 based on audio distortion compensation technique, which is characterized in that with it is described low
The loudspeaker that sound electric signal is correspondingly arranged is moving-coil woofer.
7. the Bluetooth earphone system as described in claim 1 based on audio distortion compensation technique, which is characterized in that the electronics
The resistance for adjusting intensity of phonation and the capacitor for adjusting audible frequency lower limit are provided in frequency division module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286079.3A CN109257676B (en) | 2018-10-31 | 2018-10-31 | Bluetooth headset system based on audio distortion compensation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811286079.3A CN109257676B (en) | 2018-10-31 | 2018-10-31 | Bluetooth headset system based on audio distortion compensation technology |
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| Publication Number | Publication Date |
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| CN109257676A true CN109257676A (en) | 2019-01-22 |
| CN109257676B CN109257676B (en) | 2020-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811286079.3A Active CN109257676B (en) | 2018-10-31 | 2018-10-31 | Bluetooth headset system based on audio distortion compensation technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109831715A (en) * | 2019-03-19 | 2019-05-31 | 苏州全频智能科技有限公司 | A kind of multiple-unit wireless Bluetooth headsets structure |
| CN111787442A (en) * | 2019-04-04 | 2020-10-16 | 赖俊波 | Audio processing module of digit frequency division and supporting earphone that uses thereof |
| CN111918162A (en) * | 2020-07-16 | 2020-11-10 | 南昌大学 | Multi-unit frequency division bone conduction earphone |
| CN115529521A (en) * | 2022-08-12 | 2022-12-27 | 苏州智莱欣声学科技有限公司 | Ultra-wideband response player |
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|---|---|---|---|---|
| CN109831715A (en) * | 2019-03-19 | 2019-05-31 | 苏州全频智能科技有限公司 | A kind of multiple-unit wireless Bluetooth headsets structure |
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| CN111787442A (en) * | 2019-04-04 | 2020-10-16 | 赖俊波 | Audio processing module of digit frequency division and supporting earphone that uses thereof |
| CN111918162A (en) * | 2020-07-16 | 2020-11-10 | 南昌大学 | Multi-unit frequency division bone conduction earphone |
| CN115529521A (en) * | 2022-08-12 | 2022-12-27 | 苏州智莱欣声学科技有限公司 | Ultra-wideband response player |
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| CN109257676B (en) | 2020-11-06 |
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