CN103686501A - Noise cancelling bluetooth headset - Google Patents

Noise cancelling bluetooth headset Download PDF

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Publication number
CN103686501A
CN103686501A CN201210325463.6A CN201210325463A CN103686501A CN 103686501 A CN103686501 A CN 103686501A CN 201210325463 A CN201210325463 A CN 201210325463A CN 103686501 A CN103686501 A CN 103686501A
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China
Prior art keywords
noise
module
bluetooth
channel
noise reduction
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Pending
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CN201210325463.6A
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Chinese (zh)
Inventor
谭继华
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SHENZHEN KAIJUYUAN TECHNOLOGY Co Ltd
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SHENZHEN KAIJUYUAN TECHNOLOGY Co Ltd
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Priority to CN201210325463.6A priority Critical patent/CN103686501A/en
Publication of CN103686501A publication Critical patent/CN103686501A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a noise cancelling bluetooth headset, in particular to a noise cancelling bluetooth headset which is relatively good in noise cancelling effect and convenient to use, and overcomes the defects that the conventional headset is difficult to be switched in wired/wireless transmission ways at any moment, and poor in music quality. The invention provides the noise cancelling bluetooth headset which can realize the automatic wired/wireless switch, and is relatively good in audio playback effect. In the noise cancelling bluetooth headset, a physical noise cancelling structure and an internal noise cancelling circuit are respectively adopted to process noise inside and outside the headset, the physical noise cancelling structure is used for isolating external high frequency noise, and meanwhile, the internal noise cancelling circuit is used for eliminating internal noise during the transmission process of the low and medium frequency noise and audio signals entering the headset, so that the audio signal entering the human ears finally is not affected by noise completely.

Description

Bluetooth noise cancelling headphone
[technical field]
The present invention relates to a kind of earphone, particularly a kind of noise reduction is better, uses convenient bluetooth noise cancelling headphone.
[background technology]
Along with the fast development of modern communications technology, the use of the electronic equipments such as mobile phone is increasingly extensive, but due to larger electromagnetic radiation of existence such as mobile phones, may cause certain hidden danger to user's health.Under this technical background, there is using the bluetooth earphone of short range wireless transmission technology, microphone, electroacoustic modular converter and mobile phone are separated from space, make user's mobile phone maintenance certain distance stronger with radiation when using mobile phone, simultaneously during user's communication without handheld device, it is more succinctly convenient to use, and especially in driving, waits and need to make bimanual occasion.
But existing bluetooth earphone can only be connected with wireless bluetooth device conventionally, when not using bluetooth equipment, user just becomes a kind of ornaments, in the time of listening to the music, may also need to buy in addition wired earphone, increased use cost, carry also comparatively inconvenience.
In addition, user often carry that music player is walked in the street or the first-class noise circumstance of bus in listen to the music, the music people's ear that enters mixed in together that these noises and player reproduce.If listened to the music in this noise like environment, concert is sometimes flooded by noise, so user will improve volume, and the undue raising of volume will cause people's impaired hearing, and meanwhile, sound leaks into outside from earphone, sometimes allows people around feel bad.In addition, use the musical sound of headphone reproduction high tone quality, the noise sometimes entering from outside is bothered, and makes the Quality Down of the reproduction sound that user can hear.Therefore, invent and a kind ofly can eliminate external noise, make can only hear that the noise-reduction type earphone of musical sound is imperative in user's ear.Further, the audio signal that music player is play is sent in earphone after by compression, and then the circuit of earphone inside forms audio signal by decoding again and is sent in duct.Yet in the decompression of audio signal and transport process, can make the music that finally enters into people Er Nei be mingled with a part of interior noise, if it is not carried out to noise reduction process, equally also can reduce sound quality, impact finally enters the music effect of people's ear.So, if only external noise is processed, and do not consider the impact of interior noise, can not farthest bring into play the audio frequency playback quality of earphone.
[summary of the invention]
For overcoming existing earphone wire/wireless, be difficult to switch at any time, the inferior deficiency of music, the invention provides a kind of wire/wireless can automatically switch, the better bluetooth noise cancelling headphone of audio frequency result of broadcast.
The scheme of technical solution problem of the present invention is to provide a kind of bluetooth noise cancelling headphone, it comprises a headband, two supports, two headset main body, wherein two support one end are connected with headband one end respectively, the other end is connected with two headset main body respectively, this headset main body comprises a physics denoising structure, it is for isolated external high frequency noise, and an internal control circuit, for eliminating extraneous medium and low frequency noise and audio signal at the interior noise transmitting and decompression process produces.
Preferably, this physics denoising structure is five layers of denoising structure of ear casing, sounding body, becket, ear cotton, ear muff formation, at the front portion of sounding body and rear portion, there is respectively an airtight front cavity and airtight rear chamber, by airtight front cavity and airtight rear chamber, forming only ear muff place is unlimited surrounding enclosure space, and ambient noise and earphone inside are completely cut off.
Preferably, this internal control circuit comprises a noise reduction module, this noise reduction module can gather and distinguish entering the interior noise that the extraneous medium and low frequency noise of earphone inside and audio frequency produce in transmission and decompression process, then the noise picking out is carried out after reverse process with former earphone in noise cancel out each other.
Preferably, this control circuit comprises noise reduction module, noise reduction module comprises L channel noise reduction module and R channel noise reduction module, L channel noise reduction module L channel microphone, L channel active noise reduction circuit and L channel discharge circuit, by L channel microphone and L channel discharge circuit, distinguish and gather the noise of earphone inside, then by L channel active noise reduction circuit, the noise picking out is carried out to reverse process.
Preferably, this L channel active noise reduction circuit comprises supply module, noise adjustment module and antiphase module, and this supply module is noise adjustment module and antiphase module for power supply, and this noise adjustment module can regulate the size of L channel microphone noise gathering.
Preferably, this control circuit further comprises pattern modular converter, and the wire/wireless that can realize bluetooth noise cancelling headphone by this pattern modular converter automatically switches.
Preferably, this control circuit comprises power module and signal transmitting and receiving module, by this signal transmitting and receiving module, is received wireless audio signal and is carried out signal processing.
Preferably, this signal transmitting and receiving module comprises a call microphone, and this call microphone can gather user's voice signal, and voice signal is emitted to communication equipment by signal transmitting and receiving module.
Preferably, this control circuit further comprises audio frequency output module, and this audio frequency output module comprises power amplifier, L channel output loudspeaker and R channel output loudspeaker, and audio signal can first be carried out power amplification by power amplifier before output.
The present invention further provides a kind of bluetooth noise cancelling headphone, it comprises a headband, two supports, two headset main body, wherein two support one end are connected with headband one end respectively, the other end is connected with two headset main body respectively, this headset main body comprises an ear casing, sounding body, becket, ear is cotton, ear muff, it forms five layers of physics denoising structure, external high frequency noise and earphone is inner isolated, in headset main body, be also provided with a mainboard, this mainboard is provided with control circuit, control circuit comprises power module, signal transmitting and receiving module, pattern dress die change piece, noise reduction module and audio frequency output module, power module provides stable power supply for bluetooth noise cancelling headphone, signal transmitting and receiving module is used for receiving blue teeth wireless signal and carries out audio decompression and processing, pattern modular converter provides the automatic switchover of wire/wireless for user, noise reduction module is transmitted with decompression process at the inner interior noise producing of earphone again and extraneously enters to the medium and low frequency noise in earphone for eliminating wireline audio signal and wireless audio signal, audio frequency output module is for exporting the audio frequency after inner noise reduction process.
With respect to prior art, bluetooth noise cancelling headphone of the present invention adopts the mode of most popular Bluetooth wireless transmission now to carry out the broadcasting of music, and it can be docked with multiple audio-frequence player device, realizes the broadcasting of music; User carries and also becomes convenient simultaneously.Bluetooth noise cancelling headphone of the present invention adopts respectively physics denoising structure and inner Dolby circuit respectively earphone ambient noise and earphone interior noise to be processed, use physics denoising structure that extraneous high frequency noise is isolated, by inner Dolby circuit, the medium and low frequency noise entering in earphone and audio signal are eliminated at the interior noise of transmitting procedure generation simultaneously, made the audio signal that finally enters people's ear not be subject to the impact of noise completely.When playing music by blue teeth wireless, bluetooth noise cancelling headphone of the present invention also can adopt original wireline audio transmission means to carry out audio frequency broadcasting, and bluetooth noise cancelling headphone of the present invention can be realized bluetooth and line traffic control automatically switches, during plug wire, earphone automatically switches into line traffic control pattern, and bluetooth mode is inoperative; Pull out wired after, earphone automatically switches into bluetooth mode, line traffic control pattern is inoperative.This just makes its scope of application more extensive, and also becomes convenient while using.
[accompanying drawing explanation]
Fig. 1 is the schematic perspective view of a kind of bluetooth noise cancelling headphone provided by the invention, and it comprises two headset main body.
Fig. 2 is the stereochemical structure exploded perspective view of headset main body shown in Fig. 1, and it comprises a cavity shell, a container, an accommodating lid, rear chamber lid and a pad.
Fig. 3 is the perspective view of the shell of cavity shown in Fig. 2.
Fig. 4 is the perspective view of container shown in Fig. 2.
Fig. 5 is the perspective view of accommodating lid shown in Fig. 2.
Fig. 6 is the perspective view of the lid of rear chamber shown in Fig. 2.
Fig. 7 is the perspective view that shown in Fig. 2, pad is looked from rear side.
Fig. 8 is bluetooth noise cancelling headphone Dolby circuit operation principle block diagram of the present invention.
Fig. 9 is bluetooth noise cancelling headphone L channel active noise reduction circuit theory diagrams of the present invention.
[embodiment]
In order to make object of the present invention, technical scheme and advantage are clearer, below in conjunction with drawings and Examples, the present invention are further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Refer to Fig. 1 and Fig. 2, bluetooth noise cancelling headphone 10 symmetrical configuration of the present invention, comprise headband 100, two support 200, two headset main body 300.Headband 100 two ends be connected with two support 200 one end respectively, two support 200 other ends are connected with two headset main body 300 respectively.Wherein headset main body 300 comprises cotton 309 and one ear muff 310 of bonnet 301, one cavity shell accommodating lid 304, one sounding body 305, one cavity lid 306, one aluminium ring 307, one pad 308, one ears of 302, one container 303.The container 303 of two headset main body 300 is slightly different, therefore one of them set battery be battery case, therefore another accommodating mainboard is mainboard box, the present embodiment be take mainboard box and explained as example.Bonnet 301 is connected with container 303 bottoms, and accommodating lid 304 is pushed down container 303 tops and is placed in cavity shell 302, and sounding body 305 embeds in cavity lid 306, and cavity shell 302, accommodating lid 304, cavity lid 306 connect successively by screw.Aluminium ring 307, pad 308, ear cotton 309, ear muff 310 are fitted and connected successively and are placed on cavity lid 306.
Bonnet 301 is a disc-shaped, is symmetrical arranged two outstanding snap fits 3011 on it, and it is used for being connected with container 303.
Refer to Fig. 3, cavity shell 302 is roughly the oval frustum of thin-walled of perforation, and its top cross-section is circular, and bottom section is oval, and top has the annular wall 3021 of extending to the inside, in ring, is manhole 3022, the oval post jamb 3027 of bottom for extending.In annular wall 3021, along even circumferential, arrange three cylindrical projection 3023, and two cylinder grooves 3025, there is blind hole (figure is mark not) at cylindrical projection 3023 centers, and cylinder groove 3025 is corresponding with the cylindrical projection 3033 of container 303.
Refer to Fig. 4, container 303 is cylindrical tube, has a supporting walls 3031 in pipe, for mainboard or battery are installed; Pipe outer wall radially has two outwards outstanding cylindrical projection 3033, and there is through hole (figure is mark not) at cylindrical projection 3033 centers, for threading; Pipe outer wall vertical cylindrical projection 3033 axis directions are provided with again two circular holes 3035, for being connected of support 200.
Refer to Fig. 5, accommodating lid 304 is dome structure, and two symmetrically arranged semicolumn grooves 3043 are radially arranged at dome bottom, and dome is along three cylindrical projection 3041 of circumference spaced set, and cylindrical projection 3041 centers are through hole (figure is mark not).Wherein the semicolumn groove 3043 of accommodating lid 304 and the cylindrical projection 3033 of container 303 are corresponding.
Sounding body 305 is disc-shaped.
Refer to Fig. 6, cavity lid 306 is oval covering plate structure, and its edge extends oval outer wall 3067, matches with oval post jamb 3027 inner sides of cavity shell 302; In it, there is tubular wall extension 3062, and form a cylindrical cavity 3063, at the bottom of chamber, along the circle spacing, be covered with penetrable sound hole 3065; Cavity lid 306 is arranged three the first cylindrical projection 3061 and seven the second cylindrical projection 3069 in interval in different radial positions respectively along oval circumference, wherein the first cylindrical projection 3061 is in inner side, center is through hole, the second cylindrical projection 3069 is in outside, center is blind hole (not shown), and opening points to aluminium ring 307 1 sides.
Aluminium ring 307 is oval ring laminated structure, has oval wall extension (figure is mark) outside it, has 7 holes (figure is mark) along oval circumference in ring, and hole is corresponding with 7 the second cylindrical projection that cavity covers on 306.
Refer to Fig. 7, pad 308 is oval ring laminated structure, and there are four snap fits 3081 that arrange towards aluminium ring 307 along the circle spacing ring inner side, and snap fit 3081 is arranged between two symmetrically and evenly.
Ear cotton 309 is for to make for loose porous stratified material.
Ear muff 310 is elliptical ring structure, and cross section is roughly circle, and bottom is plane, is soft material in it, coated outside one deck skin, and skin and base plane are sewed up backward interior dew edge (figure is mark not).
During assembling, bonnet 301 connects as one by snap fit 3011 and container 303 bottoms, again the cylindrical projection 3033 of container 303 is placed in the cylinder groove 3025 of cavity shell 302, accommodating lid 304 is placed on container 303, and making protruding 3041 three cylindrical projection 3023 of aiming in cavity shell 302 of three cylinders on accommodating lid 304, the semicolumn groove 3043 on accommodating lid 304 coordinates with the cylindrical projection 3033 on container 303.Subsequently sounding body 305 is embedded in the cylindrical cavity 3063 in cavity lid 306, and make sounding body 305 front portions towards penetrable sound hole 3065.Then the oval post jamb 3067 of cavity lid 306 is embedded to cavity shell 302 corresponding oval post jamb 3027 inner sides, edge, with screw, after the blind hole through cylindrical projection 3023 on the centre bore of the centre bore of the first cylindrical projection 3061 on cavity lid 306, cylindrical projection 3041 on accommodating lid 304, cavity shell 302, be connected and fixed again, and container 303 is stuck between accommodating lid 304 and cavity shell 302 tightly.Then aluminium ring 307 is placed on cavity lid 306, seven the second cylindrical projection 3069 centre bores that seven holes on aluminium ring 307 and cavity cover align, and with screw, are screwed in hole fastening.After again ear cotton 309 and pad 308 being fitted, snap in after the intracutaneous of ear muff 310 bottoms, the snap fit on pad 308 3081 is snapped in to aluminium ring 307 inside edges, complete the assembling of noise cancelling headphone main body 300.Finally headset main body 300 and support 200 and headband 100 are assembled into one, complete the assembling of whole bluetooth noise cancelling headphone 10.
Between headset main body 300 its cavity lids 306 after assembling, sounding body 305, accommodating lid 304, cavity shell 302, form an airtight back cavity, between cavity lid 306, sounding body 305, ear muff 310 and people's ear, form an airtight front cavity.
One of these bluetooth noise cancelling headphone 10 denoising structures: ear muff 310 adopts ergonomics design, corresponding with human body ear profile, filters physically extraneous high frequency noise.
Two of these bluetooth noise cancelling headphone 10 denoising structures: ear cotton 309 is soft porous material, because low-frequency sound wave is stronger than the penetration power of high frequency sound wave, so can make earphone send strong bass by the loose structure of ear cotton 309.
Three of these bluetooth noise cancelling headphone 10 denoising structures: aluminium ring 307 has shielded the interference of outer signals, are disturbed and the noise of generation by electromagnetic signal thereby blocked earphone, metallic aluminium ring 307 can also improve earphone tone color simultaneously, makes earphone sound more melodious.
Four of these bluetooth noise cancelling headphone 10 denoising structures: airtight front cavity body structure, make sounding body 305 sounding poly-and not loose, thereby make transfer voice characteristic more stable, undistorted.
Five of these bluetooth noise cancelling headphone 10 denoising structures: adopt sounding body 305 to embed cavity lid 306 by rear chamber, cavity lid 306 embeds the sealing means of cavity shell 302, mode by this fitted seal makes the sealing effectiveness of rear chamber better, prevented that sounding body 305 rear portions and anterior generation from altering sound, completely cut off the impact of external noise simultaneously, reach the object of noise reduction.
By these five layers of denoising structures, extraneous high frequency noise can be completely cut off completely outside ear muff 310, and the musical sound that inner generation body is produced is more melodized.In addition, extraneous medium and low frequency noise enter into ear muff 310 interior after, can eliminate by inner Dolby circuit.
Refer to Fig. 8, the mainboard of bluetooth noise cancelling headphone 10 is housed in the mainboard box of container 303, this mainboard is provided with control circuit 500.Control circuit 500 comprises power module 501, signal transmitting and receiving module 503, pattern modular converter 505, noise reduction module 507 and audio frequency output module 509.Power module 501 provides stable power supply for bluetooth noise cancelling headphone 10, signal transmitting and receiving module 503 is for receiving blue teeth wireless signal and carrying out audio decompression and processing, pattern modular converter 505 provides the automatic switchover of wire/wireless for user, noise reduction module 507 is for eliminating audio signal transmission and decompression process at inner interior noise and the extraneous medium and low frequency noise producing of earphone, and audio frequency output module 509 is for exporting the audio frequency after inner noise reduction process.
Power module 501 comprises DC power supply 5011, charging circuit 5013, battery 5015 and voltage stabilizing circuit 5017.DC power supply adopts the direct current of 5V to charge for battery 5015 by charging circuit 5013.Battery 5015 adopts rechargeable type lithium battery or other rechargeable batteries.
Battery 5015 is signal transmitting and receiving module 503, noise reduction module 507 and 509 power supplies of audio frequency output module simultaneously, especially, during for 509 power supply of noise reduction module 507 and audio frequency output module, need voltage be kept to constant by a voltage stabilizing circuit 5017, for noise reduction module 507 and audio frequency output module 509 provide galvanic current to press.
Signal transmitting and receiving module 503 comprises antenna 5031, filter 5032, indicating circuit 5033, oscillating circuit 5034, memory 5035, discharge circuit 5036, call microphone 5037 and Bluetooth control chip 5038.Indicating circuit 5033, oscillator circuit 5037, the operation of memory 5035 and amplifier circuit 5036 is all subject to the control of Bluetooth control chip 5038.
The blue teeth wireless audio signal that antenna 5031 sends for receiving user's audio player, just enters in Bluetooth control chip 5038 and decodes after first device 5032 filtering after filtering of the signal receiving.
Bluetooth noise cancelling headphone 10 in use, first to match with Bluetooth audio frequency player, only have after correct input password and just this earphone can be docked with audio player and received audio signal, receiving and by indicating circuit 5033, providing displaying contents intuitively for user during input password.
After opening power, Bluetooth control chip 5038 is started working, and the work that is this Bluetooth control chip 5038 by peripheral cells such as oscillating circuit 5034 and memories 5035 provides cycle of oscillation and memory function.
Bluetooth control chip 5038, as kernel control chip, is dominated whole signal transmitting and receiving module 503.
Audio signal becomes digital signal after compressing by Bluetooth control chip 5038, and this digital signal is tentatively amplified into 509 outputs of audio frequency output module by discharge circuit 5036.
In addition, this signal transmitting and receiving module 503 is also connected with a call microphone 5037 as sound source, when user opens call microphone 5037 while conversing, Bluetooth control chip 5038 sends communication equipment to by antenna 5031 after voice signal is processed and carries out distance communicating.
Pattern modular converter 505 mainly comprises a wire/wireless commutation circuit 5051, and this wire/wireless commutation circuit 5051 realizes by electronic switch in the present embodiment.When use is wired, 3.5MM plug plugged earphone jack, electronic switch control pin (the 6th pin) current potential uprises, and the 1st pin (being wireline audio signal path) communicates with the 4th pin (audio frequency input channel).At this moment, by electronic switch, wireline audio signal line connected and worked, now, can disconnect electronic switch the 3rd pin (being Bluetooth audio signals path).Otherwise, extract 3.5MM plug, electronic switch the 3rd pin and the 4th pin are connected, and Bluetooth audio signals circuit is connected and is worked, and wireline audio signal line can disconnect.
Noise reduction module 507 comprises L channel noise reduction module 5071 and R channel noise reduction module 5073, and operation principle and the line construction of L channel noise reduction module 5071 and R channel noise reduction module 5073 are all identical, lifts L channel noise reduction module 5071 describe at this.
L channel noise reduction module 5071 comprises L channel microphone 5075, L channel active noise reduction circuit 5077 and L channel discharge circuit 5079.The interior noise producing in audio signal transmission and decompression process can be emitted in bluetooth noise cancelling headphone inside, and it is mixed in together with interior noise that outside not isolated medium and low frequency noise also can enter into headset main body inside sometimes.L channel discharge circuit 5079 is for distinguishing interior noise and original wire/wireless audio signal, and the noise transmission of left side headset main body 300 inside that L channel microphone 5075 is detected to L channel active noise reduction circuit 5077 carries out Phase Processing, the audio signal after processing is by forming the de-noising signal with the noise signal single spin-echo of left side headset main body 300 inside after L channel discharge circuit 5079 operation amplifiers.
Referring to Fig. 9, is L channel active noise reduction circuit 5077 schematic diagrams, and this circuit comprises supply module 5081, noise adjustment module 5083 and antiphase module 5085.Supply module 5081 is that noise adjustment module 5083 and antiphase module 5085 are powered simultaneously.Noise adjustment module 5083 can regulate the Speech input size of L channel microphone 5075.5085 pairs of antiphase modules enter the audio signal of L channel active noise reduction circuit 5077 and carry out phase place reverse process.
The operation principle of noise adjustment module 5083 is by regulating the resistance size of adjustable potentiometer R19 to regulate the Speech input size of L channel microphone.The operation principle of antiphase module 5085 is to carry out phase place reverse process by triode Q7 and Q101.
Audio frequency output module 509 comprises power amplifier 5091, L channel output loudspeaker 5093 and R channel output loudspeaker 5095.Original audio amplifying signal from discharge circuit 5036 enters power amplifier 5091 together with left and right sound channels de-noising signal, and the original wire/wireless audio signal after power amplification and left and right sound channels de-noising signal enter into respectively L channel output loudspeaker 5093 and R channel output loudspeaker 5095 is exported.Due to the de-noising signal single spin-echo forming in the noise signal in original audio amplifying signal and left and right sound channels noise reduction module, therefore by synthetic, the noise in original wire/wireless audio signal partly can be removed.
In sum, the operation principle of utilizing each circuit and chip to realize the inner noise reduction of earphone on bluetooth noise cancelling headphone 10 control circuits 500 is: open bluetooth noise cancelling headphone 10, after input password, match with audio-frequence player device, after successful matching, by indication circuit 5033, show.Then by antenna 5031, receive blue teeth wireless audio signal, and by entering in Bluetooth control chip 5038 and encode after filter 5032 filtering, Bluetooth control chip 5038 provides peripheral operational environment by oscillating circuit 5034 and memory 5035 for it.Decoded audio signal can enter into discharge circuit 5036 and carry out elementary amplification, audio signal is now mingled with interior noise (producing in circuit transmission and decompression process, sometimes also can be because external electromagnetic interference produces) and outside medium and low frequency noise.The audio signal that is mingled with noise is exported at L channel output loudspeaker 5093 and R channel output loudspeaker 5095 respectively after power amplifier 5091 amplifies.Just in output, L channel noise reduction module 5071 is started working with R channel noise reduction module 5073, and (L channel noise reduction module 5071 is identical with R channel noise reduction module 5073 operation principles, only lifting L channel describes), by L channel microphone 5075, detect the audio signal of output, and identify noise signal by L channel discharge circuit 5079, then by L channel active noise reduction circuit 5077, this noise signal is carried out to reverse process, de-noising signal after reverse process carries out power amplification by the elementary power amplifier 5091 that is amplified into of L channel discharge circuit 5079 again, then entering to L channel output loudspeaker 5093 exports, the noise signal being mingled with due to the interior original wire/wireless audio signal of L channel output loudspeaker 5093 and the L channel de-noising signal single spin-echo of L channel noise reduction module 5071 generations, therefore, by audio frequency, synthesize noise signal is removed, only retain pure original wire/wireless audio signal, reach the function of internal circuit noise reduction.
With respect to prior art, bluetooth noise cancelling headphone of the present invention adopts the mode of most popular Bluetooth wireless transmission now to carry out the broadcasting of music, and it can be docked with multiple audio-frequence player device, realizes the broadcasting of music; User carries and also becomes convenient simultaneously.Bluetooth noise reduction of the present invention again machine 10 adopts respectively physics denoising structure and inner Dolby circuit respectively earphone ambient noise and earphone interior noise to be processed, use physics denoising structure that extraneous high frequency noise is isolated, by inner Dolby circuit, the medium and low frequency noise entering in earphone and audio signal are eliminated at the interior noise of transmitting procedure generation simultaneously, made the audio signal that finally enters people's ear not be subject to the impact of noise completely.When playing music by blue teeth wireless, bluetooth noise cancelling headphone 10 of the present invention also can adopt original wireline audio transmission means to carry out audio frequency broadcasting, and bluetooth noise cancelling headphone 10 of the present invention can be realized bluetooth and line traffic control automatically switches, during plug wire, earphone automatically switches into line traffic control pattern, and bluetooth mode is inoperative; Pull out wired after, earphone automatically switches into bluetooth mode, line traffic control pattern is inoperative.This just makes its scope of application more extensive, and also becomes convenient while using.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within principle of the present invention, are equal to and replace and within improvement etc. all should be included in protection scope of the present invention.

Claims (10)

1. a bluetooth noise cancelling headphone, it comprises a headband, two supports, two headset main body, wherein two support one end are connected with headband one end respectively, the other end is connected with two headset main body respectively, it is characterized in that: this headset main body comprises a physics denoising structure, it is for isolated external high frequency noise, and an internal control circuit, for eliminating extraneous medium and low frequency noise and audio signal at the interior noise transmitting and decompression process produces.
2. bluetooth noise cancelling headphone as claimed in claim 1, it is characterized in that: this physics denoising structure is five layers of denoising structure of ear casing, sounding body, becket, ear cotton, ear muff formation, at the front portion of sounding body and rear portion, there is respectively an airtight front cavity and airtight rear chamber, by airtight front cavity and airtight rear chamber, forming only ear muff place is unlimited surrounding enclosure space, and ambient noise and earphone inside are completely cut off.
3. bluetooth noise cancelling headphone as claimed in claim 1, it is characterized in that: this internal control circuit comprises a noise reduction module, this noise reduction module can gather and distinguish entering the interior noise that the extraneous medium and low frequency noise of earphone inside and audio frequency produce in transmission and decompression process, then the noise picking out is carried out after reverse process with former earphone in noise cancel out each other.
4. bluetooth noise cancelling headphone as claimed in claim 1, it is characterized in that: this control circuit comprises noise reduction module, noise reduction module comprises L channel noise reduction module and R channel noise reduction module, L channel noise reduction module L channel microphone, L channel active noise reduction circuit and L channel discharge circuit, by L channel microphone and L channel discharge circuit, distinguish and gather the noise of earphone inside, then by L channel active noise reduction circuit, the noise picking out is carried out to reverse process.
5. bluetooth noise cancelling headphone as claimed in claim 4, it is characterized in that: this L channel active noise reduction circuit comprises supply module, noise adjustment module and antiphase module, this supply module is noise adjustment module and antiphase module for power supply, and this noise adjustment module can regulate the size of L channel microphone noise gathering.
6. bluetooth noise cancelling headphone as claimed in claim 1, is characterized in that: this control circuit further comprises pattern modular converter, and the wire/wireless that can realize bluetooth noise cancelling headphone by this pattern modular converter automatically switches.
7. bluetooth noise cancelling headphone as claimed in claim 1, is characterized in that: this control circuit comprises power module and signal transmitting and receiving module, by this signal transmitting and receiving module, is received wireless audio signal and is carried out signal processing.
8. bluetooth noise cancelling headphone as claimed in claim 7, is characterized in that: this signal transmitting and receiving module comprises a call microphone, and this call microphone can gather user's voice signal, and voice signal is emitted to communication equipment by signal transmitting and receiving module.
9. bluetooth noise cancelling headphone as claimed in claim 1, it is characterized in that: this control circuit further comprises audio frequency output module, this audio frequency output module comprises power amplifier, L channel output loudspeaker and R channel output loudspeaker, and audio signal can first be carried out power amplification by power amplifier before output.
10. a bluetooth noise cancelling headphone, it comprises a headband, two supports, two headset main body, wherein two support one end are connected with headband one end respectively, the other end is connected with two headset main body respectively, it is characterized in that: this headset main body comprises an ear casing, sounding body, becket, ear is cotton, ear muff, it forms five layers of physics denoising structure, external high frequency noise and earphone is inner isolated, in headset main body, be also provided with a mainboard, this mainboard is provided with control circuit, control circuit comprises power module, signal transmitting and receiving module, pattern dress die change piece, noise reduction module and audio frequency output module, power module provides stable power supply for bluetooth noise cancelling headphone, signal transmitting and receiving module is used for receiving blue teeth wireless signal and carries out audio decompression and processing, pattern modular converter provides the automatic switchover of wire/wireless for user, noise reduction module is transmitted with decompression process at the inner interior noise producing of earphone again and extraneously enters to the medium and low frequency noise in earphone for eliminating wireline audio signal and wireless audio signal, audio frequency output module is for exporting the audio frequency after inner noise reduction process.
CN201210325463.6A 2012-09-05 2012-09-05 Noise cancelling bluetooth headset Pending CN103686501A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105100993A (en) * 2015-07-23 2015-11-25 努比亚技术有限公司 Bluetooth earphone
CN105959874A (en) * 2016-05-04 2016-09-21 上海摩软通讯技术有限公司 Mobile terminal and method of reducing audio frequency noise
CN106101902A (en) * 2016-08-08 2016-11-09 深圳市魅动智能股份有限公司 Noise cancelling headphone
CN106210962A (en) * 2016-09-22 2016-12-07 会听声学科技(北京)有限公司 A kind of ear stricture of vagina acoustic characteristic ONLINE RECOGNITION method and system being applicable to noise cancelling headphone design
CN106454567A (en) * 2015-08-10 2017-02-22 固昌通讯股份有限公司 Earphone microphone
WO2018032129A1 (en) * 2016-08-13 2018-02-22 深圳市魅动智能股份有限公司 Noise-reduction headphone
CN107890390A (en) * 2017-07-24 2018-04-10 湖北航天化学技术研究所 Active noise reduction protection ear shield
CN108600888A (en) * 2018-05-10 2018-09-28 广东森麦电子有限公司 A kind of noise reduction bluetooth headset
CN109391870A (en) * 2018-11-10 2019-02-26 东莞市华睿电子科技有限公司 A method of it is played based on human motion state self-regulation earpiece audio signal
WO2019042462A1 (en) * 2017-09-04 2019-03-07 深圳市魅动智能股份有限公司 Earphone rear cavity structure
CN109639881A (en) * 2018-11-10 2019-04-16 东莞市华睿电子科技有限公司 A kind of control method for playing back for sound intermediate frequency signal of conversing
CN109936792A (en) * 2019-03-19 2019-06-25 吉安市立讯射频科技股份有限公司 A kind of bluetooth headset that usage experience is good
CN110958528A (en) * 2019-12-20 2020-04-03 重庆中油重科实业有限公司 Neck hanging type explosion-proof and noise-proof Bluetooth headset

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105100993A (en) * 2015-07-23 2015-11-25 努比亚技术有限公司 Bluetooth earphone
CN106454567A (en) * 2015-08-10 2017-02-22 固昌通讯股份有限公司 Earphone microphone
CN105959874A (en) * 2016-05-04 2016-09-21 上海摩软通讯技术有限公司 Mobile terminal and method of reducing audio frequency noise
CN106101902A (en) * 2016-08-08 2016-11-09 深圳市魅动智能股份有限公司 Noise cancelling headphone
WO2018032129A1 (en) * 2016-08-13 2018-02-22 深圳市魅动智能股份有限公司 Noise-reduction headphone
CN106210962A (en) * 2016-09-22 2016-12-07 会听声学科技(北京)有限公司 A kind of ear stricture of vagina acoustic characteristic ONLINE RECOGNITION method and system being applicable to noise cancelling headphone design
CN107890390A (en) * 2017-07-24 2018-04-10 湖北航天化学技术研究所 Active noise reduction protection ear shield
WO2019042462A1 (en) * 2017-09-04 2019-03-07 深圳市魅动智能股份有限公司 Earphone rear cavity structure
CN108600888A (en) * 2018-05-10 2018-09-28 广东森麦电子有限公司 A kind of noise reduction bluetooth headset
CN109391870A (en) * 2018-11-10 2019-02-26 东莞市华睿电子科技有限公司 A method of it is played based on human motion state self-regulation earpiece audio signal
CN109639881A (en) * 2018-11-10 2019-04-16 东莞市华睿电子科技有限公司 A kind of control method for playing back for sound intermediate frequency signal of conversing
CN109936792A (en) * 2019-03-19 2019-06-25 吉安市立讯射频科技股份有限公司 A kind of bluetooth headset that usage experience is good
CN110958528A (en) * 2019-12-20 2020-04-03 重庆中油重科实业有限公司 Neck hanging type explosion-proof and noise-proof Bluetooth headset

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Application publication date: 20140326