CN1738488A - Message device with active noise eliminating function - Google Patents
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- CN1738488A CN1738488A CNA2004100584837A CN200410058483A CN1738488A CN 1738488 A CN1738488 A CN 1738488A CN A2004100584837 A CNA2004100584837 A CN A2004100584837A CN 200410058483 A CN200410058483 A CN 200410058483A CN 1738488 A CN1738488 A CN 1738488A
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Abstract
The invention relates to an audio device with the active noise elimination function, which can be coupling connected to a stereo earphone, comprising an audio processing unit and a analogue ANC control module group, wherein, the audio processing unit is used for processing the audio information to make the stereo earphone emit voice; and the analogue ANC control module group actively eliminates the noise of stereo earphone according to the feedback audio signal. In addition, the invention also comprises a power amplifier and a feedback processing unit, wherein, the power amplifier is coupling connected to the output of audio processing unit and the analogue ANC control module group for amplifying the output to be transmitted to the stereo earphone; and the feedback processing unit receives the noise detected by the stereo earphone and generates the feedback audio signal to the analogue ANC control module group.
Description
Technical field
The present invention relates to a kind of audio device, particularly relate to a kind of initiatively audio device of noise elimination function that has.
Background technology
Portable audio device appear at our life arround, very long a period of time has been arranged.At the mid-1970s, after Sony company begins the product that it is famous " Walkman " volume production, begin to be welcomed by the general public, and " Walkman " welcome degree, even become the synonym diction of portable audio device.During this section, similarly commodity are the media storage devices that rely in conjunction with as audiotape and so on.
The influence that has been subjected to digital revolution early stage in the nineties, that message industry is general, different digit news forms begins to permeate with the occupied field of machinery/analog media.(wafer is chip along with digital signal is handled wafer, below all be called wafer) price significantly reduce, with and the progress of processing procedure and the hardware framework that relied on, more and more the framework of Duo portable audio device is brought into use the principle of numeral, so the digital mobile audio device has also become the main flow on the market.But, no matter be the simulation or the portable audio device of numeral, and can't be suitable for all occasions.For example in noisy public place, the user just is difficult to enjoy the music that portable audio device is play by earphone.In a word, noise always becomes a big problem using portable audio device.
Fig. 1 is existing known a kind of initiatively digit news device calcspar of noise eliminating earphone that uses.In order to overcome the problem of noise, a kind of active noise eliminating earphone (Active Noise CancellationHeadset is hereinafter to be referred as the ANC earphone) begins to be developed.See also shown in Figure 1ly, existing known ANC earphone 120 is to have initiatively noise eliminating (hereinafter to be referred as ANC) control circuit 110, and is coupled to audio device 130.Audio device 130 has comprised message processing unit 132, be to be used for handling audio data and to produce audible signals to the speaker unit 122 of ANC earphone playing, and power supply device 134 is to be used for supplying message processing unit 132 required electric power.
The ANC earphone has receiver device 124 in addition, is to be used for the interior noise of sensing ANC earphone, and it is delivered to ANC control circuit 110.ANC control circuit 110 has comprised simulation ANC control die set 112, power amplifier 116 and feedback processing unit 118.Wherein, simulation ANC control die set 112 is according to the next noise of initiatively eliminating in the ANC earphone of the output of ANC earphone.In addition, ANC control circuit 110 also has power-supply unit 114, operates needed electric power with supply simulation ANC control die set.
Though existing known ANC earphone 110 has the ability that reduces noise jamming, but cooperate general message playing device to use, MP3 walkman for example, but the volume of ANC earphone 110 but can be excessive.Especially, existing simultaneously known ANC earphone 110 also has power-supply unit 114 etc., has therefore also increased the suitable weight of ANC earphone 110.
This shows that above-mentioned existing audio device obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.In order to solve the problem that audio device exists, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.
Because the defective that above-mentioned existing audio device exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of initiatively audio device of noise elimination function that has of new structure, can improve general existing audio device, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective that existing audio device exists, and a kind of initiatively audio device of noise elimination function that has of new structure is provided, technical problem to be solved is to make for example when the user utilizes a stereophone to cooperate the present invention to listen to music, the present invention's influence that noise-decreasing caused effectively, thus be suitable for practicality more.
Another object of the present invention is to, overcome the defective that existing audio device exists, and a kind of initiatively audio device of noise elimination function that has of new structure is provided, technical problem to be solved is to make it can lower noise composition at various frequency bands effectively, the user is listened to the influence that music causes, thereby be suitable for practicality more.
A further object of the present invention is, overcome the defective that existing audio device exists, and a kind of initiatively audio device of noise elimination function that has of new structure is provided, technical problem to be solved is to make it can reduce the volume of earphone, and alleviate the weight of earphone, thereby be suitable for practicality more.
The object of the invention to solve the technical problems realizes by the following technical solutions.A kind of audio device with active noise elimination function (ANC) according to the present invention proposes is suitable for cooperating a stereophone, and this audio device comprises: a message processing unit makes this stereophone send a message in order to handle an audio data; One simulation ANC control die set is initiatively to eliminate the interior noise of this stereophone according to a back coupling audio signal; One power amplifier couples the output of this message processing unit and this simulation ANC control die set, after the output amplification with this message processing unit and this simulation ANC control die set, delivers to this stereophone again; And a feedback processing unit, in order to receiving the noise of this stereophone institute sensing, and produce this back coupling audio signal to this simulation ANC control die set.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid audio device with active noise elimination function more comprises a power-supply unit, in order to supply electric power to this message processing unit and this ANC control die set.
Aforesaid audio device with active noise elimination function, wherein said stereophone only comprises: a sound source unit couples this power amplifier, in order to play this message; And a sensing source unit, in order to the noise in this stereophone of sensing, and its output is coupled to this feedback processing unit.
Aforesaid audio device with active noise elimination function, wherein said sound source unit is a speaker unit.
Aforesaid audio device with active noise elimination function, wherein said sensing source unit is a receiver device.
Aforesaid audio device with active noise elimination function comprises the action dish with play sound effect function.
The object of the invention to solve the technical problems also adopts following technical scheme to realize.A kind of audio device according to the present invention's proposition with active noise elimination function (ANC), be suitable for and be connected use with a stereophone, this audio device comprises: a message processing unit, make this stereophone produce a message in order to handle an audio data, and this message processing unit has a digital ANC function, is in order to initiatively to eliminate the interference of the noise of first frequency band in this stereophone according to a back coupling audio signal.One power amplifier receives the output of this message processing unit, after the output of this message processing unit is amplified, delivers to this stereophone again; And a feedback processing unit, in order to receiving the noise of this stereophone institute sensing, and produce this back coupling audio signal to this message processing unit.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid audio device with active noise elimination function more comprises a power-supply unit, in order to supply electric power to this message processing unit.
Aforesaid have an initiatively audio device of noise elimination function, and wherein said stereophone numeral ANC function is that the mode with Digital Signal Processing realizes.
Aforesaid audio device with active noise elimination function, more comprise a simulation ANC control die set, its output is to be coupled to this power amplifier, and this simulation ANC control die set is to receive this this back coupling audio signal, initiatively to eliminate the interference of the noise of second frequency band in this stereophone according to this back coupling audio signal.
Aforesaid audio device with active noise elimination function more comprises a power-supply unit, simulates the ANC control die set in order to supply electric power to this message processing unit and this.
Aforesaid audio device with active noise elimination function, wherein said stereophone only comprises: a sound source unit couples this power amplifier, in order to play this audio; And a sensing source unit, in order to the noise in this stereophone of sensing, and output is coupled to this feedback processing unit.
Aforesaid audio device with active noise elimination function, wherein said sound source unit is a speaker unit.
Aforesaid audio device with active noise elimination function, wherein said sensing source unit is a receiver device.
Aforesaid audio device with active noise elimination function is the action dish with play sound effect function.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, in order to reach aforementioned goal of the invention, major technique of the present invention thes contents are as follows:
The present invention proposes a kind of initiatively audio device of noise elimination function that has, can cooperate stereophone to use, audio device of the present invention comprises message processing unit and simulation ANC control die set, and wherein the message processing unit is to be used for handling audio data and to make stereophone send message.Simulation ANC control die set is then initiatively eliminated the interior noise of stereophone according to a back coupling signal.In addition, the present invention also comprises power amplifier and feedback processing unit, its intermediate power amplifier couples the output of message processing unit and simulation ANC control die set, is after being used for the output of message processing unit and simulation ANC control die set amplified, to deliver to stereophone again.Feedback processing unit then can receive the noise of stereophone institute sensing, and produces the back coupling audio signal to simulating the ANC control die set.
In an embodiment of the present invention, more comprised power-supply unit, be used for supplying electric power to message processing unit and ANC control die set.
Under preferable situation, stereophone has comprised sound source unit and sensing source unit.Wherein the sound source unit couples power amplifier, is to be used for play sound effect.The sensing source unit then is used for the noise in the sensing stereophone, and its output is coupled to feedback processing unit.And in an embodiment of the present invention, the sound source unit is a speaker unit, and the sensing source unit then is the receiver device.
From another viewpoint, the invention provides a kind of audio device of active noise elimination function, can be connected use with stereophone, present invention includes the message processing unit, be to be used for handling an audio data and to make stereophone send audio, and this message processing unit has digital ANC function, therefore can initiatively eliminate the interference of the noise of the first frequency band composition in the stereophone according to a back coupling audio signal.In addition, audio device of the present invention more comprises power amplifier and feedback processing unit.Its intermediate power amplifier is the output that couples the message processing unit, after the output of message processing unit is amplified, delivers to stereophone again.Feedback processing unit then is used for receiving the noise of stereophone institute sensing, and produces the back coupling audio signal to the message processing unit.
In an embodiment of the present invention, digital ANC function is that mode with Digital Signal Processing realizes.
Select among the embodiment at another, the present invention also comprises simulation ANC control die set, its output is to be coupled to power amplifier, and this simulation ANC control die set can receive the back coupling audio signal, and according to feedbacking the interference of noise of second frequency band that audio signal initiatively eliminates the noise in the stereophone.
In addition, above-mentioned power-supply unit also can be supplied electric power to the ANC unit.
In sum, therefore the present invention can abate the noise to user's influence effectively because comprise simulation ANC control die set.And the present invention also can design in the message processing unit digital ANC function is arranged, and therefore the noise to the narrow-band composition has good elimination effect.In addition, the present invention is arranged on simulation ANC control die set in the stereophone, therefore can reduce the volume of stereophone.And also because simulation ANC control die set and message processing unit are shared power-supply units, therefore weight of the present invention also can alleviate effectively.
Via as can be known above-mentioned, the invention relates to a kind of initiatively audio device of noise elimination function that has, can couple a stereophone, present invention includes message processing unit and simulation ANC control die set, wherein the message processing unit is to be used for handling audio data and to make stereophone send message.Simulation ANC control die set is then initiatively eliminated the interior noise of stereophone according to a back coupling audio signal.In addition, the present invention also comprises power amplifier and feedback processing unit, its intermediate power amplifier couples the output of message processing unit and simulation ANC control die set, after being used for the output of message processing unit and simulation ANC control die set amplified, delivers to stereophone again.Feedback processing unit then can receive the noise of stereophone institute sensing, and produces the back coupling audio signal to simulating the ANC control die set.
By technique scheme, the audio device that the present invention has the active noise elimination function has following advantage at least:
1, the present invention's circuit of function that will abate the noise is incorporated in the audio device, and there is no design in stereophone, therefore can reduce the volume of stereo ANC earphone effectively.
2, the simulation ANC control die set among the present invention is to adopt simple logical circuit wiring, so the present invention only utilizes simple circuit, just can make can have higher productivity effect, higher system reliability and lower cost.
3, the noise that is kept in the ANC stereophone of the present invention is feedback the machine-processed time delay that is produced and is caused the sound of message to differ, and also can be used for eliminating the influence that encephalic effect (in-head effect) is brought.
4, the present invention can design in the message processing unit the ANC controller, so noise jamming that can more effective elimination narrow-band.
5, message processing unit of the present invention is a shared power-supply unit with simulation ANC control die set, and therefore weight of the present invention can alleviate effectively.
6, the present invention also can be simultaneously with message processing unit with ANC controller with simulation ANC control die set design be in the same place, with the interference of the noise composition of decay effectively simultaneously broadband and arrowband.
In sum, special construction of the present invention have an initiatively audio device of noise elimination function, for example when the user utilizes stereophone cooperation the present invention to listen to music, the influence that noise-decreasing caused effectively.A kind of initiatively audio device of noise elimination function that has provided by the invention can lower the noise composition at various frequency bands effectively, and the user is listened to the influence that music causes.In addition, a kind of initiatively audio device of noise elimination function that has provided by the invention can reduce the volume of earphone, and alleviate the weight of earphone.It has above-mentioned many advantages and practical value, and in like product, do not see have similar structural design to publish or use and really genus innovation, no matter it structurally or bigger improvement all arranged on the function, have large improvement technically, and produced handy and practical effect, and more existing audio device has the multinomial effect of enhancement, thus be suitable for practicality more, and have the extensive value of industry, really be a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by a plurality of preferred embodiments, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is existing known a kind of initiatively digit news device calcspar of noise eliminating earphone that uses.
Fig. 2 is a kind of audio device block schematic diagram with active noise elimination function of first embodiment of the invention.
Fig. 3 is a kind of audio device block schematic diagram with active noise elimination function of second embodiment of the invention.
Fig. 4 is a kind of audio device block schematic diagram with active noise elimination function of third embodiment of the invention.
110, the ANC earphone 112: simulation ANC control die set
214,416: simulation ANC control die set 114: power-supply unit
222,322,424: power-supply unit 116: power amplifier
216,316,418: power amplifier 118: feedback processing unit
218,318,422: feedback processing unit 122,232,332: sound source unit
124,234,334: sensing source unit 130,210,310,410: audio device
212,312,412: message processing unit 230,330: stereophone
314,414: digital ANC control die set
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, have initiatively its embodiment of audio device, structure, feature and an effect thereof of noise elimination function to what foundation the present invention proposed, describe in detail as after.
First embodiment
Fig. 2 is a kind of initiatively audio device block schematic diagram of noise elimination function of earphone of integrating of first embodiment of the invention.See also shown in Figure 2ly, the present invention provides audio device 210, is suitable for cooperating stereophone 230 to operate.In the present embodiment, the present invention can for example be the action dish with audio playing function.In addition, stereophone 230 is meant that general unidirectional broadcast earphone with addition of a source of sound receiving element of feedbacking, itself there is no traditional ANC circuit.In audio device 210, the output of message processing unit 212 and 214 outputs of simulation ANC control die set are all delivered to stereophone 230 by power amplifier 216.Stereophone 230 is then delivered to feedback processing unit 218 with the noise of being surveyed.
Please continue to consult shown in Figure 2, message processing unit 212 is to be used for handling audio data, and the output meeting of for example MP3 message archives, and message processing unit 212 is delivered to power amplifier 216 together with the output of simulation ANC control die set.Power amplifier 216 is after the output of message processing unit 212 and simulation ANC control die set 214 is together amplified, to deliver to stereophone 230 again, plays the message of message processing unit 212 handled audio datas to drive stereophone 230.
In general, stereophone 230 can comprise sound source unit 232 and sensing source unit 234.Wherein sound source unit 232 is the output of received power amplifier 216, and sensing source unit 234 then is used for the noise in the sensing stereophone 230, and output is coupled to feedback processing unit 218.In the present embodiment, sound source unit 232 can be a speaker unit, and sensing source 234 then can be the receiver device.
After power amplifier 216 amplifies the output of message processing unit 212, can deliver to sound source 230, listen to the user and make stereophone 230 can play message.Simultaneously, sensing source unit 234 noise in can sensing stereophones 230, and output delivered to feedback processing unit 218.Wherein, the noise in the stereophone 230 may be that context produces.After feedback processing unit 218 receives the output of sensing source unit 234, its amplification can be produced and feedback audio signal to simulating ANC control die set 214.
After simulation ANC control die set 214 receives the back coupling audio signal that feedback processing unit 218 produced, can be via more inner simple circuit conversion, and produce a noise payment signal to power amplifier 216, make power amplifier 216 noise can be offseted signal and amplify, export stereophone 230 then to together with the output of audio processing unit 212.Ideally, noise payment signal can be anti-phase with the noise audio signal, that is to say, noise payment signal can constrain the noise in the stereophone 230.Yet in fact, because of the imperfection of circuit element, so noise payment signal may can be just not anti-phase with the noise audio signal.In any case but stereophone 230 also can be exported the composition that contains noise payment signal, and make the user when listening to message in output message, noise payment signal wherein becomes branch that the interference that the noise signal is produced is reduced.
In addition, the present invention also comprises for example power-supply unit 222 of battery modules, and it couples message processing unit 212 and simulation ANC control die set 214, to be used for the supplying said two devices running required electric power.
At present embodiment, audio device 210 has been integrated with the ANC function, therefore wears the sensing source unit 234 that the stereophone on user's head can be simplified to the part of general broadcast and simply increase by a back coupling usefulness, and for example radio reception device end gets final product.User's use burden can be effectively simplified, the purpose that abates the noise can be reached again.
Second embodiment
Fig. 3 is a kind of initiatively audio device block schematic diagram of noise elimination function of earphone of integrating of second embodiment of the invention.See also shown in Figure 3ly, in order to eliminate the noise jamming of narrow-band, therefore in the present embodiment, provided audio device 310.In the message processing unit 312 in audio device 310, be to have digital ANC module 414, so that message processing unit 312 has the noise jamming that the function of digital ANC is eliminated narrow-band.
Please continue to consult shown in Figure 3, the audio device 310 that present embodiment provided can cooperate stereophone 330 running equally.In audio device 310, the output of message processing unit 312 equally also is to be coupled to power amplifier 316.And similarly, power amplifier 316 exports stereophone 330 to after the output of message processing unit 312 can being amplified again.In addition, audio device 310 yet comprises feedback processing unit 318, and it is used for receiving the noise of 330 sensings of stereophone, and produces the back coupling audio signal to message processing unit 312.
Because in message processing unit 312, have digital ANC control die set 314.Therefore feedback after the signal when message processing unit 312 receives, digital ANC control die set 314 can make message processing unit 312 add the noise that first embodiment for example narrated in output and offset signal.Therefore when stereophone 330 when playing message, the composition that noise offsets signal will be eliminated the interference that noise caused of narrow-band in stereophone 330.In the present embodiment, digital ANC module 314 can be realized with the mode of Digital Signal Processing.
In addition, also have power-supply unit 322 in the audio device 310, couple message processing unit 312, to be used for supplying 312 runnings of message processing unit required electric power.
In addition, in the present embodiment, stereophone 330 equally also comprises sound source unit 332 and sensing source unit 334.Wherein, sound source unit 332 is the output of received power amplifier 316, and the output of sensing source unit 334 is coupled to feedback processing unit 318 too.The sound source unit 332 in the stereophone 330 and the operation principle of sensing source unit 334, identical with the stereophone 230 of first embodiment, do not repeat them here.
At present embodiment, the same with first embodiment, message circuit 310 has been integrated with the ANC function, therefore wears the sensing source 334 that the stereophone on user's head can be simplified to the part of general broadcast and simply increase by a back coupling usefulness, and for example little microphone end gets final product.User's use burden can be effectively simplified, the purpose that abates the noise can be reached again.
The 3rd embodiment
Fig. 4 is a kind of audio device block schematic diagram with active noise elimination function of third embodiment of the invention.See also shown in Figure 4ly, the audio device 410 that is provided in the present embodiment is first embodiment and the mixing of second embodiment, and such practising way is the interference for the noise composition of eliminating broadband and narrow-band simultaneously.Wherein, audio device 410 has comprised message processing unit 412 and simulation ANC control die set 416.The output of message processing unit 412 and simulation ANC control die set 416 is to couple power amplifier 418 jointly, and the output of feedback processing unit 422, then is coupled to message processing unit 412 and simulation ANC control die set 416 respectively.And equally also comprise digital ANC control die set 414 in the message processing unit 412, make message processing unit 412 have digital ANC function in addition, also comprise power-supply unit 424 in the audio device 410, it is used for supplying message processing unit 412 and simulation ANC control die set 416 required electric power.
The operation principles of present embodiment and the usefulness that is reached, it is sum total with reference to first and second embodiment, that is to say, audio device 410 is except eliminating as the multiband composition noise of being narrated in first embodiment, also can eliminate simultaneously the narrow-band composition noise as being narrated among second embodiment, the effect of therefore preventing and treating noise can be better.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (15)
1, a kind of audio device with active noise elimination function (ANC) is suitable for cooperating a stereophone, is characterised in that this audio device comprises:
One message processing unit makes this stereophone send a message in order to handle an audio data;
One simulation ANC control die set is initiatively to eliminate the interior noise of this stereophone according to a back coupling audio signal;
One power amplifier couples the output of this message processing unit and this simulation ANC control die set, after the output amplification with this message processing unit and this simulation ANC control die set, delivers to this stereophone again; And
One feedback processing unit in order to receiving the noise of this stereophone institute sensing, and produces this back coupling audio signal to this simulation ANC control die set.
2, the audio device with active noise elimination function according to claim 1 is characterized in that more comprising a power-supply unit, in order to supply electric power to this message processing unit and this ANC control die set.
3, the audio device with active noise elimination function according to claim 1 is characterized in that wherein said stereophone only comprises:
One sound source unit couples this power amplifier, in order to play this message; And
One sensing source unit in order to the noise in this stereophone of sensing, and is coupled to this feedback processing unit with its output.
4, the audio device with active noise elimination function according to claim 3 is characterized in that wherein said sound source unit is a speaker unit.
5, the audio device with active noise elimination function according to claim 3 is characterized in that wherein said sensing source unit is a receiver device.
6, the audio device with active noise elimination function according to claim 1 is characterized in that comprising the action dish with play sound effect function.
7, a kind of have an initiatively audio device of noise elimination function (ANC), is suitable for to be connected use with a stereophone, is characterised in that this audio device comprises:
One message processing unit, make this stereophone produce a message in order to handle an audio data, and this message processing unit has a digital ANC function, is in order to initiatively to eliminate the interference of the noise of first frequency band in this stereophone according to a back coupling audio signal.
One power amplifier receives the output of this message processing unit, after the output of this message processing unit is amplified, delivers to this stereophone again; And
One feedback processing unit in order to receiving the noise of this stereophone institute sensing, and produces this back coupling audio signal to this message processing unit.
8, the audio device with active noise elimination function according to claim 7 is characterized in that more comprising a power-supply unit, in order to supply electric power to this message processing unit.
9, according to claim 7 have an initiatively audio device of noise elimination function, it is characterized in that wherein said stereophone numeral ANC function is that mode with Digital Signal Processing realizes.
10, the audio device with active noise elimination function according to claim 7, it is characterized in that more comprising a simulation ANC control die set, its output is to be coupled to this power amplifier, and this simulation ANC control die set is to receive this this back coupling audio signal, initiatively to eliminate the interference of the noise of second frequency band in this stereophone according to this back coupling audio signal.
11, the audio device with active noise elimination function according to claim 10 is characterized in that more comprising a power-supply unit, simulates the ANC control die set in order to supply electric power to this message processing unit and this.
12, the audio device with active noise elimination function according to claim 7 is characterized in that wherein said stereophone only comprises:
One sound source unit couples this power amplifier, in order to play this audio; And
One sensing source unit in order to the noise in this stereophone of sensing, and is coupled to this feedback processing unit with output.
13, the audio device with active noise elimination function according to claim 12 is characterized in that wherein said sound source unit is a speaker unit.
14, the audio device with active noise elimination function according to claim 12 is characterized in that wherein said sensing source unit is a receiver device.
15, the audio device with active noise elimination function according to claim 7 is characterized in that it is the action dish with play sound effect function.
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|---|---|---|---|
| CNA2004100584837A CN1738488A (en) | 2004-08-19 | 2004-08-19 | Message device with active noise eliminating function |
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| CNA2004100584837A CN1738488A (en) | 2004-08-19 | 2004-08-19 | Message device with active noise eliminating function |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159991B (en) * | 2006-10-03 | 2011-10-05 | 索尼株式会社 | Audio equipment |
| US20120155668A1 (en) * | 2010-01-22 | 2012-06-21 | Anpac Semiconductor Limited | Noise Canceling Earphone and a Driving Circuit |
| CN102947685A (en) * | 2010-06-17 | 2013-02-27 | 杜比实验室特许公司 | Method and apparatus for reducing the effect of environmental noise on listeners |
| WO2014180023A1 (en) * | 2013-05-08 | 2014-11-13 | 安百特半导体有限公司 | Method and device for supplying power for anc earphone using power supply of electronic device |
| CN106465007A (en) * | 2014-03-28 | 2017-02-22 | ams有限公司 | Control circuit for active noise control and method for active noise control |
| CN108228038A (en) * | 2017-12-22 | 2018-06-29 | 北京松果电子有限公司 | Noise cancellation apparatus, noise-eliminating method, computer readable storage medium and electronic equipment |
| CN113242491A (en) * | 2021-06-29 | 2021-08-10 | 展讯通信（上海）有限公司 | Noise reduction processing method, apparatus, device, storage medium, and program |
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2004
- 2004-08-19 CN CNA2004100584837A patent/CN1738488A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159991B (en) * | 2006-10-03 | 2011-10-05 | 索尼株式会社 | Audio equipment |
| US20120155668A1 (en) * | 2010-01-22 | 2012-06-21 | Anpac Semiconductor Limited | Noise Canceling Earphone and a Driving Circuit |
| CN102947685A (en) * | 2010-06-17 | 2013-02-27 | 杜比实验室特许公司 | Method and apparatus for reducing the effect of environmental noise on listeners |
| CN102947685B (en) * | 2010-06-17 | 2014-09-17 | 杜比实验室特许公司 | Method and apparatus for reducing the effect of environmental noise on listeners |
| US9135907B2 (en) | 2010-06-17 | 2015-09-15 | Dolby Laboratories Licensing Corporation | Method and apparatus for reducing the effect of environmental noise on listeners |
| WO2014180023A1 (en) * | 2013-05-08 | 2014-11-13 | 安百特半导体有限公司 | Method and device for supplying power for anc earphone using power supply of electronic device |
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