CN105848054B - Earphone and noise reduction method thereof - Google Patents
Earphone and noise reduction method thereof Download PDFInfo
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- CN105848054B CN105848054B CN201610147513.4A CN201610147513A CN105848054B CN 105848054 B CN105848054 B CN 105848054B CN 201610147513 A CN201610147513 A CN 201610147513A CN 105848054 B CN105848054 B CN 105848054B
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- 210000003128 head Anatomy 0.000 description 21
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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
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Abstract
The invention provides an earphone and a noise reduction method thereof, wherein the earphone comprises two earphones and an earphone wire connected with the earphones; the earphone comprises a shell and a sound production unit contained in the shell; a noise reduction microphone is respectively arranged in the two receivers, and a communication microphone is fixed on the earphone line; the communication microphone and the two noise reduction microphones are used for carrying out uplink noise reduction on the earphone; and the two noise reduction microphones are used for carrying out downlink noise reduction on the earphone. By using the invention, the heart-shaped wave beam positioned in front of the head can be formed by the three microphones, thereby reducing the influence of external noise and improving the communication quality of the earphone.
Description
Technical Field
The present invention relates to the field of acoustic technologies, and in particular, to an ANC earphone having an uplink noise reduction function and a downlink noise reduction function and a noise reduction method thereof.
Background
At present, ANC (Active Noise Control, Active Noise Control system) earphones mainly include a feed-forward type earphone, a feedback type earphone and a hybrid earphone, and the earphones are composed of a loudspeaker, an earphone shell, a Noise reduction microphone, a communication microphone, a wire Control and the like.
The existing feedforward and hybrid ANC earphones mainly comprise two realization modes, namely, the conversation function is realized through a conversation microphone, and at the moment, the single conversation microphone is difficult to realize uplink noise reduction processing, so that the conversation quality is difficult to improve; secondly, Beam Forming is realized through the feedforward ANC microphones to eliminate noise in the range of two sides of human ears, but because the beams formed by the two ANC microphones are in the shape of an 8, the noise at the back side of the head of a user cannot be eliminated, and the pickup of only a call signal is difficult to realize.
It can be known that, in the existing ANC earphone, only two ANC microphones are relatively fixed, and received audio signals are also relatively stable, and the beams that can be made by the two microphones can only be in a shape of "8", and the beams on the back side of the head of the user cannot be cancelled; in addition, the call microphone cannot be effectively fixed, and the call microphone is usually single, so that the uplink noise reduction processing cannot be performed.
Disclosure of Invention
In view of the foregoing problems, an object of the present invention is to provide an ANC headset and a noise reduction method thereof, in which two ANC microphones are used to implement downlink noise reduction of the headset, and under the combined action of a call microphone and the two ANC microphones, uplink noise reduction of the headset is implemented, so that noise reduction capability of the headset and call quality of a user can be effectively improved.
According to an aspect of the present invention, there is provided a headset including two earpieces, a headset wire connected to the earpieces; the earphone comprises a shell and a sound production unit contained in the shell; wherein, two receivers are respectively provided with a noise reduction microphone, and a communication microphone is fixed on the earphone line; the communication microphone and the two noise reduction microphones are used for carrying out uplink noise reduction on the earphone; and the two noise reduction microphones are used for carrying out downlink noise reduction on the earphone.
In addition, it is preferable that the noise reduction microphone processes the received voice signal, removes noise signals in directions of both sides of the human ear, and forms a beam in a shape of "8" in the front-rear direction of the head.
In addition, it is preferable that the call microphone performs parameter analysis on the received voice signal, determines the direction of the voice signal, and eliminates the beam located behind the head to form a "heart" shaped beam located in front of the head.
In addition, it is preferable that the noise reduction microphone is an ANC microphone; the talking microphone is an ANC microphone, a capacitance microphone or an electrodynamic microphone.
In addition, it is preferable that a fixing structure is provided to the microphone for communication.
In addition, it is preferable that the housing includes a front cover and a rear cover which are connected in an adaptive manner, and the sound generating unit and the corresponding noise reduction microphone are accommodated in the front cover and the rear cover.
In addition, it is preferable that the microphone is fixed to any one of the earphone lines, and the microphone and the two noise reduction microphones form a triangular structure.
In addition, it is preferable that a main sound output tube is provided on the front cover, and an in-ear earmuff is provided on the main sound output tube in a fitting manner.
Further, it is preferable that a tuning sheet for adjusting the acoustic performance of the sound emitting unit is stuck to the main sound output tube; wherein, the tuning sheet is screen cloth, sponge or non-woven fabrics.
According to another aspect of the present invention, there is provided a method for reducing noise of a headphone, wherein the headphone is used to reduce noise of external noise; the earphone noise reduction method comprises the following steps: the noise reduction microphone carries out downlink noise reduction processing on the received voice signals, eliminates noise signals in the directions of two sides of human ears, and forms 8-shaped wave beams in the front-back direction of the head; the call microphone on the earphone cord analyzes and processes the received voice signal, eliminates the wave beam behind the head, retains the wave beam in front of the head, and realizes noise reduction of the earphone.
By using the earphone and the noise reduction method thereof, noise signals at two sides of the ears of a user are eliminated through the noise reduction microphones in the two earphones, and then the noise signals behind the head of the user are eliminated under the coordination of the call microphones, so that uplink noise reduction and downlink noise reduction of the earphone can be realized simultaneously, and the call quality and the user experience of the user are effectively improved.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic diagram of a distribution of microphone locations according to an embodiment of the present invention;
FIG. 2-1 is a schematic view of a figure-8 beam according to an embodiment of the present invention;
FIG. 2-2 is a schematic diagram of a "cardioid" beam in accordance with an embodiment of the present invention;
FIG. 3 is a block diagram of a noise reduction principle of a headphone according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for reducing noise of a headphone according to an embodiment of the present invention.
Wherein the reference numerals include: noise reduction microphones 1, 1', a call microphone 2, an earphone cord 3, and a user 4.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
For a detailed description of the earphone and the noise reduction method thereof, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 shows a microphone position distribution structure according to an embodiment of the present invention.
As shown in fig. 1, the earphone according to the embodiment of the present invention includes two earphones and an earphone line 3 connected to the earphones; each earphone comprises a shell and a sound production unit contained in the shell; namely, the earphone comprises two earphones, each earphone is respectively connected with a corresponding earphone wire, a noise reduction microphone (respectively a microphone 1 and a microphone 1', the same below) is respectively arranged in the two earphones, and a call microphone 2 is fixed on any earphone wire; the communication microphone 2 and the two noise reduction microphones are used for carrying out uplink noise reduction on the earphone; and moreover, the two noise reduction microphones can also realize the downlink noise reduction of the earphone.
In an embodiment of the present invention, the noise reduction microphone may be an ANC (Active noise control system) microphone, and the conversation microphone 2 may be an ANC microphone, or an ordinary condenser microphone or an electric microphone. Two noise reduction microphones in the receiver are used for carrying out algorithm processing on voice signals received by the microphones to eliminate noise signals positioned on two sides of human ears, and 8-shaped wave beams are formed in the front and back directions of the head of the user 4.
In particular, fig. 2-1 and 2-2 show "figure-8" beam and "heart" beam schematic structures, respectively, according to embodiments of the present invention.
As shown in fig. 1 to fig. 2-1, in the earphone according to the embodiment of the present invention, the earphones positioned in the left and right ears of the user 4 are respectively provided with a noise reduction microphone 1 and a noise reduction microphone 1', a call microphone 2 is fixed on any earphone wire 3 of the two earphones, and the call microphone 2 and the two noise reduction microphones form a triangular structure. In the figure, the direction F indicates the direction in front of the head of the user 4, and the direction B indicates the direction behind the head of the user 4.
In order to facilitate the user 4 to fix the microphone 2, a simple fixing structure such as a fixing clip may be further disposed on the housing or the cavity of the microphone 2. In the process of communication, the user 4 can fix the communication microphone 2 on the clothes through the fixing structure and realize the uplink noise reduction processing of the earphone by matching with two noise reduction microphones positioned in the receiver.
In particular, fig. 3 illustrates a noise reduction principle of a headphone according to an embodiment of the present invention.
As shown in fig. 3, in the noise reduction process of the earphone according to the embodiment of the present invention, two noise reduction microphones (or ANC microphones) in the earphone are used to perform an algorithm process on the received voice signals, so as to eliminate the noise signals in the directions of two sides of the human ear, and form a "8" -shaped beam in the front-back direction of the head of the user, as shown in fig. 2-1; the matching of the two noise reduction microphones can improve the signal-to-noise ratio (unit dB) of the earphone to a certain extent and improve the communication quality.
Then, the call microphone on the earphone line can receive the voice signal in the call process, and the directions 'F' and 'B' of the call voice signal are judged by analyzing the voice signal received by the call microphone and comparing the parameters of the voice signal, such as the size, the frequency and the like; finally, the beam in the "B" direction is eliminated on the "8" shaped beam through the algorithm processing, only the beam in the "F" direction is reserved, and as shown in figure 2-2, a "heart" shaped beam in front of the head of the user is finally formed.
In another embodiment of the present invention, the housing comprises a front cover and a rear cover which are connected in a fitting manner, and the sound generating unit and the corresponding noise reduction microphone are both accommodated in the front cover and the rear cover; the main sound output tube is arranged on the front cover, the in-ear muffs which are connected in a matching mode are arranged on the main sound output tube, the in-ear muffs can be made of materials such as silica gel or high-elasticity polyester, and can be in close contact with the auditory meatus after being inserted into the auditory meatus to isolate sound from entering the middle ear and the inner ear, and therefore the purpose of sound insulation is achieved. In addition, a tuning sheet for adjusting the acoustic performance of the sound emitting unit may be attached to the main sound output tube to improve the acoustic performance of the headphone. The tuning sheet can be mesh, sponge or non-woven fabric.
By using the earphone, the positions of the noise reduction microphone and the call shell are fixed by fixing the call microphone, so that a heart-shaped wave beam voice signal is formed under the combined action of the three microphones and is output to human ears as a signal, the influence of external noise on the call can be effectively reduced, and the call quality of a user is improved.
Corresponding to the earphone device, the invention also provides an earphone noise reduction method, which is used for carrying out noise reduction processing on external noise. Fig. 4 shows a flow of a noise reduction method for a headphone according to an embodiment of the present invention.
As shown in fig. 4, the method for reducing noise of a headphone according to an embodiment of the present invention includes the following steps:
s410: the noise reduction microphone carries out downlink noise reduction processing on the received voice signals, eliminates noise signals on two sides of human ears, and forms 8-shaped wave beams in the front-back direction of the head.
In this step, two noise reduction microphones (or ANC microphones) in the headset can perform algorithm processing on the received voice signals, eliminate noise signals located in the directions of two sides of human ears, and form 8-shaped beams in the front-back direction of the head of the user, thereby improving the signal-to-noise ratio and the call quality of the headset.
S420: the call microphone on the earphone cord analyzes and processes the received voice signal, eliminates the wave beam behind the head, retains the wave beam in front of the head, and finally realizes the uplink noise reduction processing of the earphone.
Analyzing a voice signal received by a call microphone positioned on an earphone wire, comparing various parameters such as the size, the frequency and the like of the voice signal, and judging the direction of the call voice signal; finally, through algorithm processing, the wave beam positioned at the back of the head is eliminated on the 8-shaped wave beam, only the heart-shaped wave beam signal positioned at the front of the head is reserved and output to human ears, uplink noise reduction of the earphone can be realized through the call microphone, and the call quality is improved.
For the embodiment of the noise reduction method for the earphone provided by the invention, since the embodiment is basically similar to the embodiment of the earphone device, relevant points refer to partial description of the embodiment of the device, and are not described herein again.
Therefore, the earphone of the present invention includes an uplink noise reduction unit and a downlink noise reduction unit, where the uplink noise reduction unit includes two noise reduction microphones located in the earphone and one call microphone located on the earphone line; the downlink noise reduction unit comprises two noise reduction microphones positioned in the receiver. Under the combined action of three microphones (two noise reduction microphones and one communication microphone), uplink noise reduction and downlink noise reduction of the earphone can be realized simultaneously, and the noise reduction effect is obvious.
According to the earphone and the noise reduction method thereof, noise signals at two sides of the ears of a user are eliminated through the noise reduction microphones in the two earphones, then the noise signals behind the head of the user are also eliminated under the coordination of the call microphones, uplink noise reduction and downlink noise reduction of the earphone can be simultaneously realized, and the call quality and the user experience of the user are effectively improved.
The headphone and the noise reduction method thereof according to the present invention are described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the headset and the noise reduction method thereof without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (7)
1. An earphone comprises two earphones and an earphone wire connected with the earphones; the earphone comprises a shell and a sound production unit contained in the shell; it is characterized in that the preparation method is characterized in that,
a noise reduction microphone is respectively arranged in the two receivers, and a communication microphone is fixed on the earphone line; wherein,
a fixing structure is arranged on the communication microphone and used for fixing the communication microphone on clothes of a user;
the communication microphone and the two noise reduction microphones are used for carrying out uplink noise reduction on the earphone; and,
the two noise reduction microphones are used for carrying out downlink noise reduction on the earphone;
the noise reduction microphone processes the received voice signals, eliminates noise signals on two sides of human ears, and forms 8-shaped wave beams in the front-back direction of the head;
the call microphone performs parameter analysis on the received voice signal, judges the direction of the voice signal, eliminates the wave beam positioned at the back of the head, and forms a heart-shaped wave beam positioned at the front of the head.
2. The headset of claim 1,
the noise reduction microphone is an ANC microphone;
the conversation microphone is an ANC microphone, a capacitor microphone or an electrodynamic microphone.
3. The headset of claim 1,
the shell comprises a front cover and a rear cover which are connected in an adaptive mode, and the sound production unit and the corresponding noise reduction microphone are contained in the front cover and the rear cover.
4. The headset of claim 1,
the communication microphone is fixed on any earphone line, and the communication microphone and the two noise reduction microphones form a triangular structure.
5. The headset of claim 3,
the front cover is provided with a main sound output tube, and the main sound output tube is provided with an in-ear earmuff which is in adaptive connection.
6. The headset of claim 5,
a tuning sheet material for adjusting the acoustic performance of the sound production unit is pasted on the main sound output pipe; wherein,
the tuning sheet is mesh, sponge or non-woven fabric.
7. A method for reducing noise of earphones, which utilizes the earphones as claimed in any one of claims 1 to 6 to reduce noise of outside; wherein the method comprises the following steps:
the noise reduction microphone carries out downlink noise reduction processing on the received voice signals, eliminates noise signals in the directions of two sides of human ears, and forms 8-shaped wave beams in the front-back direction of the head;
and a call microphone positioned on the earphone cord analyzes and processes the received voice signal, eliminates a wave beam positioned at the rear of the head, reserves a wave beam positioned in front of the head, and realizes noise reduction of the earphone.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3529801B1 (en) * | 2016-10-24 | 2020-12-23 | Avnera Corporation | Automatic noise cancellation using multiple microphones |
| CN106658265B (en) * | 2017-02-14 | 2023-09-12 | 歌尔股份有限公司 | Noise reduction earphone and electronic equipment |
| CN107018461A (en) * | 2017-03-22 | 2017-08-04 | 广东欧珀移动通信有限公司 | Headphones and Noise Reduction Method |
| CN107426643B (en) * | 2017-07-31 | 2019-08-23 | 歌尔股份有限公司 | Uplink noise cancelling headphone |
| CN107396223B (en) * | 2017-07-31 | 2019-07-19 | 歌尔股份有限公司 | Earphone uplink noise-reduction method |
| CN109068215B (en) * | 2018-08-14 | 2020-03-13 | 歌尔科技有限公司 | Noise reduction method and device of in-ear earphone and in-ear earphone |
| CN110149573B (en) * | 2019-04-01 | 2021-02-19 | 联想(北京)有限公司 | Electronic equipment |
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| CN101667426A (en) * | 2009-09-23 | 2010-03-10 | 中兴通讯股份有限公司 | Device and method for eliminating environmental noise |
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| CN204887355U (en) * | 2015-07-03 | 2015-12-16 | 歌尔声学股份有限公司 | Earphone |
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| CN205430557U (en) * | 2016-03-15 | 2016-08-03 | 歌尔声学股份有限公司 | Earphone |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2003013185A1 (en) * | 2001-08-01 | 2003-02-13 | Dashen Fan | Cardioid beam with a desired null based acoustic devices, systems and methods |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101667426A (en) * | 2009-09-23 | 2010-03-10 | 中兴通讯股份有限公司 | Device and method for eliminating environmental noise |
| WO2016007480A1 (en) * | 2014-07-11 | 2016-01-14 | Analog Devices, Inc. | Low power uplink noise cancellation |
| CN204887355U (en) * | 2015-07-03 | 2015-12-16 | 歌尔声学股份有限公司 | Earphone |
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