CN109257676B - Bluetooth headset system based on audio distortion compensation technology - Google Patents
Bluetooth headset system based on audio distortion compensation technology Download PDFInfo
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- CN109257676B CN109257676B CN201811286079.3A CN201811286079A CN109257676B CN 109257676 B CN109257676 B CN 109257676B CN 201811286079 A CN201811286079 A CN 201811286079A CN 109257676 B CN109257676 B CN 109257676B
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 27
- 229910052742 iron Inorganic materials 0.000 claims description 20
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000004044 response Effects 0.000 description 30
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 210000005069 ears Anatomy 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 206010017577 Gait disturbance Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 238000003379 elimination reaction Methods 0.000 description 1
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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
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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
Abstract
The invention discloses a Bluetooth earphone system based on an audio distortion compensation technology, which comprises a Bluetooth receiving module, a Bluetooth receiving module and a processing module, wherein the Bluetooth receiving module receives digital signals of audio and converts the digital signals into analog signals; the electronic frequency division module is connected with the Bluetooth receiving module and decomposes the analog signal into an extremely high pitch electric signal, a middle pitch electric signal and a low pitch electric signal; the loudspeakers are respectively connected with the electronic frequency division module to generate sounds of different frequency bands according to the super-high-pitch electric signal, the middle-pitch electric signal and the low-pitch electric signal; and the physical frequency adjusting parts are respectively connected with the rear ends of the corresponding loudspeakers and are used for controlling the sound production frequency of the loudspeakers. It can compensate bluetooth headset's sound distortion, realizes bluetooth headset high-quality sound output.
Description
Technical Field
The invention relates to the technical field of Bluetooth earphones, in particular to a Bluetooth earphone system based on an audio distortion compensation technology.
Background
The Bluetooth earphone applies the Bluetooth technology to the hands-free earphone, so that users can avoid annoying wiring stumbling and can easily talk in various ways. Since the advent of bluetooth headsets, it has been a good tool for the mobile commerce industry to increase efficiency. At present, with the elimination of 3.5 earphone interfaces and the pursuit of convenience and quickness of some mobile phones, people are more and more interested in Bluetooth earphones.
However, the bluetooth transmission process is easy to cause audio signal loss and distortion; and because the bluetooth circuit driving capability is not enough, this just further aggravates sound distortion, can't realize high-quality HIFI sound characteristic.
Disclosure of Invention
The invention aims to provide a Bluetooth headset system based on an audio distortion compensation technology, which can compensate the sound distortion of a Bluetooth headset and realize high-quality sound output of the Bluetooth headset.
In order to solve the above technical problem, the present invention provides a bluetooth headset system based on an audio distortion compensation technology, which includes a bluetooth receiving module, wherein the bluetooth receiving module receives a digital signal of an audio frequency and converts the digital signal into an analog signal; the electronic frequency division module is connected with the Bluetooth receiving module and decomposes the analog signal into an extremely high pitch electric signal, a middle pitch electric signal and a low pitch electric signal; the loudspeakers are respectively connected with the electronic frequency division module to generate sounds of different frequency bands according to the super-high-pitch electric signal, the middle-pitch electric signal and the low-pitch electric signal; and the physical frequency adjusting parts are respectively connected with the rear ends of the corresponding loudspeakers and are used for controlling the sound production frequency of the loudspeakers.
Preferably, the physical frequency adjusting unit is a sound wave guide, and the upper limit of the sound emission frequency of the corresponding speaker can be changed by the sound wave guide having different lengths.
Preferably, a signal amplification module is arranged between the bluetooth receiving module and the electronic frequency division module, and the signal amplification module is used for amplifying the analog signal output by the bluetooth receiving module.
Preferably, the speaker corresponding to the high-pitched electric signal is a moving-iron high-pitched speaker, and the speaker corresponding to the high-pitched electric signal is a moving-iron high-pitched speaker.
Preferably, the two loudspeakers corresponding to the midrange electric signal are moving-iron midrange loudspeakers.
Preferably, the speaker provided in correspondence with the bass electric signal is a moving coil woofer.
Preferably, the electronic frequency division module is provided with a resistor for adjusting the sound intensity and a capacitor for adjusting the lower limit of the sound frequency.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention decomposes the analog signal into an extreme high pitch electric signal, a middle pitch electric signal and a low pitch electric signal through the electronic frequency division module, and also arranges a physical frequency adjusting part at the rear end of the loudspeaker corresponding to each group of signals, and realizes the frequency division compensation of the earphone frequency response characteristic through the combined action of the electronic frequency division adjustment and the physical frequency adjustment, and finally obtains a smooth frequency response curve, which is in line with the equal response curve of human ears, and realizes the high-quality HIFI sound.
2. The invention solves the problems of audio signal loss and distortion caused by the Bluetooth transmission process, realizes the high-quality sound output of the earphone and provides better hearing enjoyment.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to be able to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a graph of the frequency response of different sound producing units, wherein A is a sound producing frequency response curve of a moving coil woofer, B is a sound producing frequency response curve of a moving iron midrange loudspeaker, C is a sound producing frequency response curve of a moving iron tweeter, and D is a sound producing frequency response curve of a moving iron midrange loudspeaker;
FIG. 3 illustrates the frequency response of a conventional Bluetooth headset system;
FIG. 4 is a compensation graph;
FIG. 5 is a frequency response curve finally obtained after frequency division compensation;
fig. 6 is a schematic diagram of frequency response of the improvement of the treble characteristic.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1, the invention discloses a bluetooth headset system based on audio distortion compensation technology, comprising a bluetooth receiving module, an electronic frequency division module, a plurality of loudspeakers and a plurality of physical frequency adjusting parts.
The Bluetooth receiving module receives the digital signal of the audio frequency and converts the digital signal into an analog signal.
The electronic frequency division module is connected with the Bluetooth receiving module, and the electronic frequency division module decomposes the analog signal into an extremely high pitch electric signal, a middle pitch electric signal and a low pitch electric signal.
And the electronic frequency division module is internally provided with a resistor for adjusting the sound production intensity and a capacitor for adjusting the lower limit of the sound production frequency. The resistance can limit the current magnitude, and determines the overall sound intensity. The capacitance Z is 1/j ω C, and the capacitance gradually decreases as the frequency increases, so the capacitance determines the lower limit of the low frequency of sound production. Fig. 2 is frequency response curves of different sound units, wherein a is a sound production frequency response curve of a moving coil woofer, B is a sound production frequency response curve of a moving iron midrange loudspeaker, C is a sound production frequency response curve of a moving iron tweeter, and D is a sound production frequency response curve of a moving iron midrange loudspeaker. For the sound production frequency response curve B of the moving-iron midrange loudspeaker, the capacitance is reduced, the lower limit of the low frequency of the frequency response curve is correspondingly changed, and the lower limit of the low frequency is changed into B1Namely, the electronic frequency division module can control the lower limit of the sound production intensity and the frequency.
And the loudspeakers are respectively connected with the electronic frequency division module to emit sounds of different frequency bands according to the super-high-pitch electric signal, the middle-pitch electric signal and the low-pitch electric signal.
And the physical frequency adjusting parts are respectively connected with the rear ends of the corresponding loudspeakers and are used for controlling the sound production frequency of the loudspeakers.
The physical frequency adjusting part is a sound wave guide tube, and the upper limit of the sound production frequency of the corresponding loudspeaker can be changed through the sound wave guide tubes with different lengths. Different pipes have different acoustic impedances, so that pipes with different lengths have different attenuation degrees to high tones, and therefore, the upper limit of the sound production frequency of the unit can be changed through the pipes, the pipes are shortened, and the upper limit of the sound production frequency is increased. As shown in FIG. 2, for the sound frequency response curve B of the moving-iron mediant speaker, the duct becomes short and the upper limit of the sound frequency is setBecomes large, and its upper frequency limit becomes B2。
And a signal amplification module is arranged between the Bluetooth receiving module and the electronic frequency division module and is used for amplifying the analog signals output by the Bluetooth receiving module. Because the electronic frequency division module needs to drive a plurality of loudspeakers to produce sound, the electronic frequency division module needs to have larger driving current, the power supply voltage of the Bluetooth receiving module is lower, and at the moment, the signal amplification module can amplify the analog signal output by the Bluetooth receiving module and provide enough large driving current for the electronic frequency division module.
The loudspeaker corresponding to the high-pitch electric signal is a moving-iron high-pitch loudspeaker, and the loudspeaker corresponding to the high-pitch electric signal is a moving-iron high-pitch loudspeaker. The sound frequency section emitted by the loudspeaker corresponding to the extremely high sound electric signal is 5120-; the sound frequency section emitted by the loudspeaker corresponding to the high-pitch electric signal is 2560 and 5120 HZ.
The loudspeakers corresponding to the mediant electric signal are two moving-iron mediant loudspeakers. Because the signal of the mediant part is more, in order to strengthen the stability of the sound production of the mediant, two moving-iron mediant loudspeakers are selected. The sound frequency section emitted by the loudspeaker corresponding to the middle sound electric signal is 160-1280 HZ.
The loudspeaker corresponding to the bass electric signal is a moving coil bass loudspeaker. The mixed design of the moving coil loudspeaker and the moving iron loudspeaker can realize the better frequency response characteristic output of the Bluetooth headset and reduce the production cost. The sound production frequency range of the loudspeaker corresponding to the bass electric signal is 20-160 HZ.
In a conventional bluetooth headset system, a bluetooth receiving module obtains a digital signal, and then converts the digital signal into an analog electrical signal and a vibration acoustic signal in sequence, and a frequency response characteristic of the bluetooth receiving module is distorted in a conversion process. Fig. 3 shows the frequency response of a conventional bluetooth headset system, where no frequency division compensation is added. Fig. 4 is a compensation graph implemented by the cooperation of the resistor and the capacitor in the electronic frequency division module and the sound wave guide in the physical frequency adjustment part. Fig. 5 is a frequency response curve finally obtained after frequency division compensation. The curve of fig. 3 is synthesized with the curve of fig. 4 to obtain the curve of fig. 5, i.e. after frequency division compensation, the final pronunciation of the whole system composed of bluetooth-electro-acoustic is realized. The curve is smooth as shown in fig. 5, and the high-quality HIFI sound is realized according to the equal-sound curve of human ears.
Because the Bluetooth can cause attenuation of the ultra-high sound, the electro-acoustic part needs to improve the response of the ultra-high sound, and the ultra-high frequency response of the ultra-high sound after 8k is improved by properly increasing the series capacitance of the ultra-high frequency unit in the electronic frequency divider and shortening the length from the ultra-high frequency loudspeaker to the sound wave guide tube as much as possible, so that loss of sound details caused by Bluetooth transmission can be compensated, and the sound scene sense and the sound restoring degree are improved. After the high pitch characteristic is adjusted, the frequency response is improved after 8k, and the whole earphone is smooth in frequency response curve, balanced in high frequency, medium frequency and low frequency and has the HIFI quality. FIG. 6 is a schematic diagram of frequency response of high-pitched sound characteristic enhancement, wherein E is the original frequency response characteristic diagram, E1To shorten the length from the ultra-high range speaker to the sound guide, a frequency response characteristic diagram is obtained.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A Bluetooth earphone system based on audio distortion compensation technique, comprising
The Bluetooth receiving module receives the digital signal of the audio frequency and converts the digital signal into an analog signal;
the electronic frequency division module is connected with the Bluetooth receiving module and decomposes the analog signal into an extremely high pitch electric signal, a middle pitch electric signal and a low pitch electric signal;
the loudspeakers are respectively connected with the electronic frequency division module to generate sounds of different frequency bands according to the super-high-pitch electric signal, the middle-pitch electric signal and the low-pitch electric signal;
the physical frequency adjusting parts are respectively connected with the rear ends of the corresponding loudspeakers and are used for controlling the sound production frequency of the loudspeakers; the physical frequency adjusting part is a sound wave guide pipe, and the upper limit of the sound production frequency of the corresponding loudspeaker can be changed through the sound wave guide pipes with different lengths.
2. The audio distortion compensation technology-based bluetooth headset system of claim 1, wherein a signal amplification module is disposed between the bluetooth receiving module and the electronic frequency dividing module, and the signal amplification module is configured to amplify the analog signal output by the bluetooth receiving module.
3. The bluetooth headset system based on audio distortion compensation technique as claimed in claim 1, wherein the speaker disposed corresponding to the very high pitch electrical signal is a moving-iron very high pitch speaker, and the speaker disposed corresponding to the high pitch electrical signal is a moving-iron high pitch speaker.
4. The bluetooth headset system according to the audio distortion compensation technique of claim 1, wherein the speakers provided corresponding to the midrange electric signal are moving-iron midrange speakers, and the number of the moving-iron midrange speakers is two.
5. The bluetooth headset system based on the audio distortion compensation technique as claimed in claim 1, wherein the speaker disposed corresponding to the bass electric signal is a moving coil woofer.
6. The bluetooth headset system based on audio distortion compensation technology as claimed in claim 1, wherein a resistor for adjusting the sound production intensity and a capacitor for adjusting the lower limit of the sound production frequency are disposed in the electronic frequency dividing 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811286079.3A CN109257676B (en) | 2018-10-31 | 2018-10-31 | Bluetooth headset system based on audio distortion compensation technology |
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| CN109257676A CN109257676A (en) | 2019-01-22 |
| CN109257676B true CN109257676B (en) | 2020-11-06 |
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5692059A (en) * | 1995-02-24 | 1997-11-25 | Kruger; Frederick M. | Two active element in-the-ear microphone system |
| CN105959851A (en) * | 2016-06-14 | 2016-09-21 | 常州市武进晶丰电子有限公司 | Ear type treble compensation headphone |
| CN106961650A (en) * | 2017-05-16 | 2017-07-18 | 芜湖中科智捷信息科技有限责任公司 | A kind of loudspeaker bugle |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8116502B2 (en) * | 2009-09-08 | 2012-02-14 | Logitech International, S.A. | In-ear monitor with concentric sound bore configuration |
| CN201928413U (en) * | 2010-12-29 | 2011-08-10 | 东莞达电电子有限公司 | Earphone with dual-speaker structure |
| CN204948328U (en) * | 2015-08-26 | 2016-01-06 | 成都优逸工业设计有限公司 | Unit three move iron earphone frequency dividing circuit |
| CN106028202B (en) * | 2016-07-20 | 2019-01-29 | 谭学斌 | Enclose iron bluetooth headset |
| CN206196006U (en) * | 2016-11-11 | 2017-05-24 | 歌尔科技有限公司 | Many loudspeaker earphone with leading note pipe |
| US10171902B2 (en) * | 2017-03-29 | 2019-01-01 | Campfire Audio Llc | In-ear monitor |
| CN207744107U (en) * | 2017-12-06 | 2018-08-17 | 美律电子(深圳)有限公司 | Earphone frequency dividing circuit |
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2018
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5692059A (en) * | 1995-02-24 | 1997-11-25 | Kruger; Frederick M. | Two active element in-the-ear microphone system |
| CN105959851A (en) * | 2016-06-14 | 2016-09-21 | 常州市武进晶丰电子有限公司 | Ear type treble compensation headphone |
| CN106961650A (en) * | 2017-05-16 | 2017-07-18 | 芜湖中科智捷信息科技有限责任公司 | A kind of loudspeaker bugle |
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Effective date of registration: 20231023 Address after: Room 718, Floor 7, Building 2, Smart Valley Park, the Taihu Lake Software Industrial Park, No. 1463, Wuzhong Avenue, Yuexi Street, Wuzhong District, Suzhou City, Jiangsu Province, 215000 Patentee after: Suzhou Zhiweixin Acoustic Technology Co.,Ltd. Address before: Room 1712, 17th floor, Phoenix Plaza, 66 Dongwu North Road, Wuzhong District, Suzhou, Jiangsu 215000 Patentee before: Suzhou weishili Technology Co.,Ltd. |