WO2019024394A1 - 上行降噪耳机 - Google Patents
上行降噪耳机 Download PDFInfo
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- WO2019024394A1 WO2019024394A1 PCT/CN2017/117480 CN2017117480W WO2019024394A1 WO 2019024394 A1 WO2019024394 A1 WO 2019024394A1 CN 2017117480 W CN2017117480 W CN 2017117480W WO 2019024394 A1 WO2019024394 A1 WO 2019024394A1
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- microphone
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- housing
- noise reduction
- earphone
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1083—Reduction of ambient noise
Definitions
- the present invention relates to the field of acoustic technology, and more particularly to an uplink noise canceling earphone.
- the requirements for the acoustic parameters of earphones that can be used with them are becoming higher and higher.
- Current earphones generally have an uplink noise reduction function.
- the earphone with the uplink noise reduction function receives the speaker's voice signal and the ambient noise signal through the microphone, and then the received voice signal and The noise signal is transmitted to the noise reduction chip, and the noise reduction algorithm is used to ensure that the other party can still hear the clear voice signal.
- the single-microphone or dual-microphone is mainly used to implement the uplink noise reduction function of the earphone.
- the dual microphone When the dual microphone is used for the uplink noise reduction of the earphone, the main microphone close to the speaker's mouth mainly picks up the voice of the person speaking, and the microphone close to the human ear is the secondary microphone, which is mainly used for picking up noise and voice signals.
- the time at which the speech signal reaches the primary and secondary microphones varies with time due to the distance. Then the noise can be suppressed according to the time difference. Therefore, there are two key parameters directly related to the noise reduction performance of the microphone array.
- One is the distance between two microphones (ie, the primary microphone and the secondary microphone), and the other is the microphone array connection and the voice signal to be enhanced.
- the angle between the sources if the distance between the two microphones is large and the angle is small, the uplink noise reduction performance of the earphone is better, and the noise reduction effect is worse. In general, the distance between two microphones cannot
- the current earphones are difficult to make a big breakthrough in the uplink noise reduction performance.
- the main reasons are: 1. When the microphone is placed in the earphone shell, the ear canal is far away from the mouth, and the external auditory canal The normal distance from the mouth to the center of the lips is 130mm, which is usually the distance from the center of the binaural wireless headset microphone or microphone array to the center of the lip; 2. The center of the microphone or microphone array is almost back-to-back center of the lips, and is securely worn.
- the angle between the microphone array centerline and the microphone array to the center of the lip is usually larger, usually above 30 degrees, which will result in a lower speech-to-noise ratio of the microphone array position, and will also result in The attenuation of the high-frequency voice signal is large; 3. If the earphone is placed in the online control box, the minimum distance that the line control must satisfy the dual microphone (ie, the primary and secondary microphones) is 20 mm, which is obviously difficult to achieve.
- the microphone is placed in the earphone casing, the distance between the two microphones is difficult to meet the minimum distance of 20 mm. It is required that the main microphone is far away from the mouth, resulting in poor call quality. The other is that if the microphone is placed in the online control, the angle between the microphone and the mouth is difficult to reach a straight line, resulting in poor quality of noise reduction.
- a single microphone is used for noise reduction, and the white noise reduction amount can only be about 14 dB, and the speech intelligibility or intelligibility is poor.
- an object of the present invention is to provide an uplink noise canceling earphone to solve the problem of poor uplink noise reduction performance of the existing uplink noise canceling earphone.
- the uplink noise canceling earphone comprises a headphone wire control disposed on the earphone wire, and a left earphone housing and a right earphone housing respectively connected at two ends of the earphone cable; wherein a call microphone is arranged in the earphone wire control a noise reduction module; a first microphone and a second microphone are disposed in the left earphone housing, the distance from the first microphone to the call microphone is greater than the distance from the second microphone to the call microphone; and the third microphone and the fourth microphone are disposed in the right earphone housing a microphone, the distance of the third microphone to the call microphone is greater than the distance of the fourth microphone call microphone; and the position of the third microphone in the right earphone housing is symmetrical with the position of the first microphone in the left earphone housing, and the fourth microphone is on the right
- the position in the earphone housing is symmetrical with the position of the second microphone in the left earphone housing; the noise reduction module is configured to acquire the voice signals picked up by the call microphone, the first
- the earphone wire control includes a wire control casing, the call microphone and the noise reduction module are all disposed in the online control casing; wherein the noise reduction module reaches the call microphone, the first microphone, the second microphone, and the third according to the voice signal. The time difference between the microphone and the fourth microphone eliminates the noise signal in the speech signal.
- the earphone wire control includes a wire control shell, the call microphone and the noise reduction module are all disposed in the online control shell; wherein, the noise reduction module is based on the call microphone, the first microphone, the second microphone, the third microphone, and the The difference in the energy value of the speech signal picked up by the four microphones, the language The noise signal in the tone signal is cancelled.
- the earphone wire control includes a wire control shell, the call microphone and the noise reduction module are all disposed in the online control shell; wherein, the noise reduction module is based on the call microphone, the first microphone, the second microphone, the third microphone, and the The difference in sensitivity of the speech signal picked up by the four microphones eliminates the noise signal in the speech signal.
- the noise reduction module includes a first noise reduction module and a second noise reduction module; wherein, the first noise reduction module is configured to: when the call microphone is located at the front end of the neck, the call microphone, the first microphone, and the second The noise signal in the voice signal picked up by the microphone, the third microphone, and the fourth microphone is eliminated; the second noise reduction module is configured to: when the call microphone is located at the back end of the neck, the call microphone, the first microphone, the second microphone, The noise signals in the voice signals picked up by the third microphone and the fourth microphone are eliminated.
- a preferred structure is: a switch is disposed on the online control housing, and is switched between the first noise reduction module and the second noise reduction module through the changeover switch.
- the left earphone housing includes a left ear main housing, a left ear front housing, and a left ear lead portion connected to the left ear main housing, and the left ear lead portion and the left ear front case are respectively located Both ends of the left ear main casing; wherein the first microphone is disposed in the left ear main casing near the left ear front casing, and the second microphone is disposed in the left ear main casing near the left ear wire portion.
- the right earphone housing includes a right ear main housing, a right ear front housing, and a right ear lead portion connected to the right ear main housing, and the right ear lead portion and the right ear front case are respectively located Both ends of the right ear main casing; wherein the third microphone is disposed in the right ear main casing near the right ear front casing, and the fourth microphone is disposed in the right ear main casing near the right ear wire portion.
- the call microphone is an ANC microphone, a condenser microphone or an electric microphone
- the first microphone, the second microphone, the third microphone and the fourth microphone are ANC microphones.
- two microphones are respectively disposed in the left earphone housing and the right earphone housing by setting a call microphone and a noise reduction module in the earphone wire control, that is, setting in the left earphone housing a first and a second microphone, wherein the third and fourth microphones are disposed in the right earphone housing, and at the same time, the distance between the first and second microphones is as large as possible, and the distance between the third and fourth microphones is also It may be large, and the first microphone and the third microphone are symmetrically arranged, and the second microphone and the fourth microphone are symmetrically arranged, so that the noise reduction module can be used for the call microphone, The noise signals in the voice signals picked up by the first microphone, the second microphone, the third microphone, and the fourth microphone are eliminated.
- the invention can maximize the uplink noise reduction processing of the neckline earphone, thereby improving the quality of the voice call.
- FIG. 1 is a schematic structural diagram of an uplink noise canceling earphone according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a neck front end wearing manner of an uplink noise canceling earphone according to an embodiment of the present invention
- FIG. 3 is a schematic structural diagram of a neck rear end wearing manner of an uplink noise canceling earphone according to an embodiment of the invention.
- the present invention separately sets two microphones in the left earphone housing and the right earphone housing by setting a call microphone and a noise reduction module in the earphone wire control.
- the first and second microphones are arranged in the left earphone housing, in the right ear
- the third and fourth microphones are disposed in the casing, and at the same time, the distance between the first and second microphones is as large as possible, the distance between the third and fourth microphones is also as large as possible, and the first microphone and
- the third microphone is symmetrically disposed, and the second microphone and the fourth microphone are symmetrically arranged, so that the noise canceling module can pick up the voice of the call microphone, the first microphone, the second microphone, the third microphone, and the fourth microphone.
- the noise signal in the signal is cancelled.
- the invention can maximize the uplink noise reduction processing of the neckline earphone, thereby improving the quality of the voice call.
- FIG. 1 illustrates a structure of an uplink noise canceling earphone according to an embodiment of the present invention
- FIG. 2 illustrates a neck front end wearing mode of an uplink noise canceling earphone according to an embodiment of the present invention.
- Structure; FIG. 3 shows the structure of the neck rear end wearing manner of the uplink noise canceling earphone according to an embodiment of the present invention.
- the uplink noise canceling earphone provided by the present invention comprises a headphone wire control 2 disposed on the earphone wire 1, and a left earphone housing 3 and a right earphone housing 4 respectively connected to the two ends of the earphone cable 1.
- the call microphone 21 and the noise reduction module 22 are disposed in the headphone wire control; the first microphone 31 and the second microphone 32 are disposed in the left earphone housing 3, and the distance between the first microphone 31 and the call microphone 21 is greater than a distance from the second microphone 32 to the call microphone 21; a third microphone 41 and a fourth microphone 42 are disposed in the right earphone housing 4, and the distance from the third microphone 41 to the call microphone 21 is greater than the distance from the fourth microphone 42 to the call microphone 21.
- the position of the third microphone 41 in the right earphone housing 4 is symmetrical with the position of the first microphone 31 in the left earphone housing 3, the position of the fourth microphone 42 in the right earphone housing 4 and the second microphone 32 is symmetrical in position in the left earphone housing 3; the noise reduction module 22 is used to receive the voice signals picked up by the call microphone 21, the first microphone 31, the second microphone 32, the third microphone 41, and the fourth microphone 42. Noise signal into Line elimination.
- the headset wire control 2 includes a wire control housing 23, and the call microphone 21 and the noise reduction module 22 are disposed in the online control housing 23; wherein the noise reduction module 22 reaches the call microphone 21, the first microphone 31, and the second microphone according to the voice signal. 32.
- the time difference between the third microphone 41 and the fourth microphone 42 eliminates the noise signal in the voice signal.
- the call microphone is set on the line control, which is closest to the human mouth, and the sound emitted by the mouth first reaches the call microphone, that is, the call microphone picks up the voice signal first, and the first microphone to the call microphone The distance is greater than the distance from the second microphone to the call microphone, so the sound emitted by the mouth must finally reach the first microphone.
- the voice signal picked up by the third microphone is necessarily picked up later than the fourth microphone relative to the fourth microphone. To the language Sound signal. Therefore, the noise signal in the voice signal can be eliminated according to the time difference of the voice signals picked up by the call microphone, the first microphone, the second microphone, the third microphone, and the fourth microphone.
- the noise signal in the voice signal can be eliminated according to the energy value difference or the sensitivity difference of the voice signal picked up by the call microphone, the first microphone, the second microphone, the third microphone, and the fourth microphone.
- the distance between the first microphone and the second microphone, and the distance between the third microphone and the fourth microphone are set as much as possible. Large, thus ensuring the noise reduction accuracy of the noise reduction module.
- the left earphone housing 3 includes a left ear main housing 33, a left ear front housing 34, and a left ear lead portion 35 connected to the left ear main housing 33, and the left ear lead portion 35 and the left ear front case 34 are respectively located at both ends of the left ear main case 33; wherein the first microphone 31 is disposed in the left ear main case 33 at a position close to the left ear front case 34, and the second microphone 32 It is disposed in the left main body casing 33 at a position close to the left ear wire portion 35.
- the right earphone housing 4 includes a right ear main housing 43, a right ear front housing 44, and a right ear lead portion 45 connected to the right ear main housing 43, and the right ear lead portion 45 and the right ear front housing 44 are respectively located. Both ends of the right ear main casing 43; wherein the third microphone 41 is disposed in the right ear main casing 43 at a position close to the right ear front casing 44, and the fourth microphone 42 is disposed in the right ear main casing 43. The position of the right ear lead portion 45.
- the noise reduction mode of the noise reduction module is also different for the two different wearing modes of the neckline earphone.
- the noise reduction module includes a first noise reduction module 221 and a second noise reduction module 222; wherein the first noise reduction module is configured to connect the call microphone when the call microphone is located at the front end of the neck The noise signal in the voice signal picked up by the first microphone, the second microphone, the third microphone, and the fourth microphone is eliminated; the second noise reduction module is used to connect the microphone to the microphone when the call microphone is located at the back end of the neck The noise signals in the voice signals picked up by one microphone, the second microphone, the third microphone, and the fourth microphone are eliminated.
- the hearing method is the front end of the neck
- the calling microphone since the calling microphone is located at the front end of the neck, at this time, The angle formed by the call microphone is different from that of the first microphone, the second microphone, the third microphone, and the fourth microphone, and the distance from the mouth to the five microphones is different.
- the voice signal reaches the time of the five microphones. It is also different. This time difference is usually called delay.
- the noise reduction algorithm is programmed in the first noise reduction module 221, so that the uplink noise reduction can be achieved to the utmost extent. purpose.
- the wearing method is the neck rear end
- the distance from the call microphone to the mouth when the microphone is located at the back end of the neck is inevitably different from the distance from the mouth when the calling microphone is at the front end of the neck, and the voice signal is different.
- the delay is also different.
- the noise reduction algorithm set in the first noise reduction microphone is obviously not suitable for the noise reduction of the neck rear end wearing mode. Therefore, by setting the second noise reduction module, the second reduction is performed.
- the algorithm for setting the neck back end wearing mode in the noise module 222 can also achieve the purpose of uplink noise reduction to the utmost extent.
- the above simply describes the noise reduction principle of the noise reduction module by the time difference of the voice signal reaching the call microphone, the first microphone, the second microphone, the third microphone and the fourth microphone, as for the energy value difference and sensitivity according to the voice signal.
- the difference between the difference and the time difference is similar, and will not be repeated here.
- the online control housing is further provided with a changeover switch 24, which may be a wire switch or a trigger switch, and is switched between the first noise reduction module and the second noise reduction module through the switch to facilitate The user makes an adaptive selection of the noise reduction module. That is, when the neck front end is worn, the first noise reduction module is used for uplink noise reduction; when it is the neck rear end mode, the second noise reduction module is used for uplink noise reduction.
- the changeover switch 24 can also be within the noise reduction module 22.
- a left ear speaker 36 is disposed in the left ear front case 34, and a left ear canal tube 37 is attached to an end of the left ear front case 34;
- a right ear horn 46 is disposed in the front housing 44, and a right ear canal tube 47 is attached to the end of the right ear front housing.
- the left ear canal tube 37 and the right ear canal tube 47 are respectively inserted into the left ear and the right ear of the human body, so that the sounds of the left ear horn 36 and the right ear horn 46 enter the human body through the left ear canal tube and the right ear canal tube, respectively.
- the above-mentioned call microphone is an ANC (Active Noise Control) microphone, a condenser microphone or an electric microphone; the first microphone, the second microphone, the third microphone, and the fourth microphone described above.
- ANC Active Noise Control
- the uplink noise canceling earphone provided by the present invention can maximize the neckline earphone Uplink noise reduction processing, thereby improving the quality of voice calls; and setting different noise reduction algorithms for different wearing modes can enhance the practicality of the neckline earphones, thereby improving the user experience while improving the quality of voice calls. .
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Abstract
本发明提供了一种上行降噪耳机，包括耳机线控、左耳机壳体和右耳机壳体；在耳机线控内设置有通话麦克风和降噪模块；左耳机壳体内设置有第一和第二麦克风，第一麦克风到通话麦克风的距离大于第二麦克风到通话麦克风的距离；右耳机壳体内设置有第三和第四麦克风，第三麦克风到通话麦克风的距离大于第四麦克风通话麦克风的距离；并且，第三麦克风与第一麦克风相对称，第四麦克风与第二麦克风相对称；降噪模块用于获取通话麦克风、第一、第二、第三和第四麦克风所拾取的语音信号，并将所获取到的语音信号中的噪声信号进行消除。通过本发明能够对颈线式耳机进行上行降噪处理，从而提高语音通话的质量。
Description
本发明涉及声学技术领域，更为具体地，涉及一种上行降噪耳机。
随着高品质智能手机、Pad等便携式电子产品的广泛应用，人们对可与其配合应用的耳机的声学参数的要求也越来越高。目前的耳机一般都带有上行降噪功能，在嘈杂环境中打电话时，带有上行降噪功能的耳机通过麦克风接收说话人的语音信号和周围环境噪音信号，然后将所接收的语音信号和噪音信号传递至降噪芯片，并通过降噪算法来保证对方仍旧能够听到清晰的语音信号。
目前主要采用单麦克风或者双麦克风来实现耳机的上行降噪功能。在采用双麦克风进行耳机上行降噪时，靠近说话人嘴巴的为主麦克风，主要拾取人说话的声音，靠近人耳朵的麦克风为副麦克风，主要用于拾取噪声和语音信号。语音信号到达主副麦克风的时间由于距离不同，其时间也有不同。那么根据该时间差即可对噪声进行抑制。因此，有两个关键参数直接关系到麦克风阵列降噪性能的好坏，一个是两颗麦克风(即主麦克风与副麦克风)之间的距离，另一个是麦克风阵列连线与要增强的语音信号的来源之间的夹角；如果两颗麦克风之间的距离大且夹角小，则耳机的上行降噪性能较好，反之降噪效果较差。通常而言，两颗麦克风之间的距离不能小于20mm。
然而，由于佩戴及产品设计，目前的耳机很难在上行降噪性能上有较大突破，主要原因在于：1、麦克风放置在耳机壳部位时，因耳机壳部位到嘴的距离较远，外耳道口到嘴唇中心的常规距离为130mm，这通常也是双耳真无线耳机麦克风或者麦克风阵列中心到嘴唇中心的距离；2、麦克风或者麦克风阵列中心几乎是背对着嘴唇中心拾音，且由于佩戴稳固度的要求，麦克风阵列中心线与麦克风阵列到嘴唇中心的连线的角度通常较大，通常在30度以上，如此则会导致麦克风阵列位置的语音噪声比处于较低的状态，并且还会导致
高频语音信号的衰减较大；3、若将耳机放置在线控盒内，则线控必须满足双麦克风(即主副麦克风)的最小距离为20mm，这显然很难做到。
因此，针对颈线式耳机，目前的耳机采用双麦克风进行上行降噪时存在两个问题，一是若将麦克风放置在耳机壳内，则两颗麦克风之间的距离很难满足20mm的最小距离要求，同时主麦克风离嘴较远，导致通话质量不好；另一个是若将麦克风放置在线控内，则麦克风与嘴巴的角度很难达到一条直线，从而导致降噪质量差。而目前采用单麦克风进行降噪，其白噪声降噪量只能在14dB左右，且语言清晰度或可懂度较差。
发明内容
鉴于上述问题，本发明的目的是提供一种上行降噪耳机，以解决现有的上行降噪耳机存在的上行降噪性能差的问题。
本发明提供的上行降噪耳机，包括设置在耳机线上的耳机线控，以及分别连接在耳机线两端的左耳机壳体和右耳机壳体；其中，在耳机线控内设置有通话麦克风和降噪模块；在左耳机壳体内设置有第一麦克风和第二麦克风，第一麦克风到通话麦克风的距离大于第二麦克风到通话麦克风的距离；在右耳机壳体内设置有第三麦克风和第四麦克风，第三麦克风到通话麦克风的距离大于第四麦克风通话麦克风的距离；并且，第三麦克风在右耳机壳体内的位置与第一麦克风在左耳机壳体内的位置相对称，第四麦克风在右耳机壳体内的位置与第二麦克风在左耳机壳体内的位置相对称；降噪模块用于获取通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风所拾取的语音信号，并将所获取到的语音信号中的噪声信号进行消除。
此外，优选的结构为：耳机线控包括线控外壳，通话麦克风和降噪模块均设置在线控外壳内；其中，降噪模块根据语音信号到达通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风的时间差异，对语音信号中的噪声信号进行消除。
此外，优选的结构为：耳机线控包括线控外壳，通话麦克风和降噪模块均设置在线控外壳内；其中，降噪模块根据通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风所拾取到的语音信号的能量值差异，对语
音信号中的噪声信号进行消除。
此外，优选的结构为：耳机线控包括线控外壳，通话麦克风和降噪模块均设置在线控外壳内；其中，降噪模块根据通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风所拾取到的语音信号的灵敏度差异，对语音信号中的噪声信号进行消除。
此外，优选的结构为：降噪模块包括第一降噪模块和第二降噪模块；其中，第一降噪模块用于在通话麦克风位于颈前端时，对通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风所拾取到的语音信号中的噪声信号进行消除；第二降噪模块用于在通话麦克风位于颈后端时，对通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风所拾取到的语音信号中的噪声信号进行消除。
此外，优选的结构为：在线控外壳上设置有转换开关，通过转换开关在第一降噪模块和第二降噪模块之间切换。
此外，优选的结构为：左耳机壳体包括左耳主壳体、左耳前壳体和与左耳主壳体相连的左耳导线部，且左耳导线部与左耳前壳体分别位于左耳主壳体的两端部；其中，第一麦克风设置在左耳主壳体内靠近左耳前壳体的位置，第二麦克风设置在左耳主壳体内靠近左耳导线部的位置。
此外，优选的结构为：右耳机壳体包括右耳主壳体、右耳前壳体和与右耳主壳体相连的右耳导线部，且右耳导线部与右耳前壳体分别位于右耳主壳体的两端部；其中，第三麦克风设置在右耳主壳体内靠近右耳前壳体的位置，第四麦克风设置在右耳主壳体内靠近右耳导线部的位置。
此外，优选的结构为：通话麦克风为ANC麦克风、电容式麦克风或者电动式麦克风；第一麦克风、第二麦克风、第三麦克风和第四麦克风为ANC麦克风。
利用上述根据本发明的上行降噪耳机，通过在耳机线控内设置通话麦克风和降噪模块，在左耳机壳体和右耳机壳体内分别各设置两颗麦克风，即：在左耳机壳体内设置第一、第二麦克风，在右耳机壳体内设置第三、第四麦克风，同时，将第一和第二麦克风之间的距离尽可能大，将第三和第四麦克风之间的距离也尽可能大，并且将第一麦克风和第三麦克风相对称设置，将第二麦克风和第四麦克风相对称设置，如此，降噪模块便可对通话麦克风、
第一麦克风、第二麦克风、第三麦克风和第四麦克风所拾取到的语音信号中的噪声信号进行消除。通过本发明能够最大限度对颈线式耳机进行上行降噪处理，从而提高语音通话的质量。
为了实现上述以及相关目的，本发明的一个或多个方面包括后面将详细说明特别指出的特征。下面的说明以及附图详细说明了本发明的某些示例性方面。然而，这些方面指示的仅仅是可使用本发明的原理的各种方式中的一些方式。此外，本发明旨在包括所有这些方面以及它们的等同物。
通过参考以下结合附图的说明内容，并且随着对本发明的更全面理解，本发明的其它目的及结果将更加明白及易于理解。在附图中：
图1为根据本发明实施例的上行降噪耳机的结构示意图；
图2为根据本发明实施例的上行降噪耳机的颈前端佩戴方式的结构示意图；
图3为根据本发明实施例的上行降噪耳机的颈后端佩戴方式的结构示意图。
在所有附图中相同的标号指示相似或相应的特征或功能。
图中：耳机线1、耳机线控2、通话麦克风21、降噪模块22、第一降噪模块221、第二降噪模块222、线控外壳23、转换开关24、左耳机壳体3、第一麦克风31、第二麦克风32、左耳主壳体33、左耳前壳体34、左耳导线部35、左耳喇叭36、左耳道管37、右耳机壳体4、第三麦克风41、第四麦克风42、右耳主壳体43、右耳前壳体44、右耳导线部45、右耳喇叭46、右耳道管47。
以下将结合附图对本发明的具体实施例进行详细描述。
针对前述现有的上行降噪耳机存在上行降噪性能差的问题，本发明通过在耳机线控内设置通话麦克风和降噪模块，在左耳机壳体和右耳机壳体内分别各设置两颗麦克风，即：在左耳机壳体内设置第一、第二麦克风，在右耳
机壳体内设置第三、第四麦克风，同时，将第一和第二麦克风之间的距离尽可能大，将第三和第四麦克风之间的距离也尽可能大，并且将第一麦克风和第三麦克风相对称设置，将第二麦克风和第四麦克风相对称设置，如此，降噪模块便可对通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风所拾取到的语音信号中的噪声信号进行消除。通过本发明能够最大限度对颈线式耳机进行上行降噪处理，从而提高语音通话的质量。
为说明本发明提供的上行降噪耳机，图1示出了根据本发明实施例的上行降噪耳机的结构，图2示出了根据本发明实施例的上行降噪耳机的颈前端佩戴方式的结构；图3示出了根据本发明实施例的上行降噪耳机的颈后端佩戴方式的结构。
如图1至图3所示，本发明提供的上行降噪耳机包括设置在耳机线1上的耳机线控2，以及分别连接在耳机线1两端的左耳机壳体3和右耳机壳体4；其中，在耳机线控内设置有通话麦克风21和降噪模块22；在左耳机壳体3内设置有第一麦克风31和第二麦克风32，第一麦克风31到通话麦克风21的距离大于第二麦克风32到通话麦克风21的距离；在右耳机壳体4内设置有第三麦克风41和第四麦克风42，第三麦克风41到通话麦克风21的距离大于第四麦克风42到通话麦克风21的距离；并且，第三麦克风41在右耳机壳体4内的位置与第一麦克风31在左耳机壳体3内的位置相对称，第四麦克风42在右耳机壳体4内的位置与第二麦克风32在左耳机壳体3内的位置相对称；降噪模块22用于将通话麦克风21、第一麦克风31、第二麦克风32、第三麦克风41和第四麦克风42所拾取到的语音信号中的噪声信号进行消除。
其中，耳机线控2包括线控外壳23，通话麦克风21和降噪模块22均设置在线控外壳23内；其中，降噪模块22根据语音信号到达通话麦克风21、第一麦克风31、第二麦克风32、第三麦克风41和第四麦克风42的时间差异，对语音信号中的噪声信号进行消除。
具体地，在本发明中，通话麦克风设置在线控上，其距离人体嘴巴最近，嘴巴发出的声音最先到达通话麦克风，即通话麦克风最先拾取到语音信号，而由于第一麦克风到通话麦克风的距离大于第二麦克风到通话麦克风的距离，因此嘴巴发出的声音必然最后达到第一麦克风，同样地，相对于第四麦克风，第三麦克风所拾取到的语音信号也必然晚于第四麦克风所拾取到的语
音信号。因此，根据通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风所拾取到的语音信号的时间差异，即可对语音信号中的噪声信号进行消除。
此外，还可以根据通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风所拾取到的语音信号的能量值差异或者灵敏度差异来对语音信号中的噪声信号进行消除。
另外，为了能够更好的对拾取到的语音信号进行消除，在本发明中，将第一麦克风和第二麦克风之间的距离，以及第三麦克风与第四麦克风之间的距离设置得尽可能大，从而保证降噪模块的降噪精度。
在本发明的一个具体实施方式中，左耳机壳体3包括左耳主壳体33、左耳前壳体34和与左耳主壳体33相连的左耳导线部35，且左耳导线部35与左耳前壳体34分别位于左耳主壳体33的两端部；其中，第一麦克风31设置在左耳主壳体33内靠近左耳前壳体34的位置，第二麦克风32设置在左耳主壳体33内靠近左耳导线部35的位置。右耳机壳体4包括右耳主壳体43、右耳前壳体44和与右耳主壳体43相连的右耳导线部45，且右耳导线部45与右耳前壳体44分别位于右耳主壳体43的两端部；其中，第三麦克风41设置在右耳主壳体43内靠近右耳前壳体44的位置，第四麦克风42设置在右耳主壳体43内靠近右耳导线部45的位置。通过上述设置能够使第一麦克风和第二麦克风之间的距离，以及第三麦克风与第四麦克风之间的距离保持得尽可能大。
由于目前的颈线式耳机通常会存在两种佩戴方式，一种是佩戴于颈前端，此时通话麦克风位于人体颈前端；另一种是佩戴于颈后端，此时通话麦克风位于人体颈后端。在本发明中，针对颈线式耳机的两种不同的佩戴方式，其降噪模块的降噪方式也有所不同。
在本发明的另一个具体实施方式中，上述降噪模块包括第一降噪模块221和第二降噪模块222；其中，第一降噪模块用于在通话麦克风位于颈前端时，对通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风所拾取到的语音信号中的噪声信号进行消除；第二降噪模块用于在通话麦克风位于颈后端时，对通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风所拾取到的语音信号中的噪声信号进行消除。
具体为，当佩戴方式为颈前端时，由于通话麦克风位于颈前端，此时，
通话麦克风与第一麦克风、第二麦克风、第三麦克风和第四麦克风所形成的角度不同，而嘴巴到上述五颗麦克风的距离也不同，当嘴巴发声时，语音信号到达上述五颗麦克风的时间也有所不同，这种时间差异通常称之为时延，根据语音信号到各个麦克风的时延，在第一降噪模块221中编写降噪算法，如此，则能够最大限度的达到上行降噪的目的。
当佩戴方式为颈后端时，由于通话麦克风位于颈后端，此时，通话麦克风位于颈后端时到嘴巴的距离必然与通话麦克风位于颈前端时到嘴巴的距离有所不同，其语音信号的时延也有所不同，此时，设置在第一降噪麦克风中的降噪算法显然不适用于颈后端佩戴方式的降噪，因此，通过设置第二降噪模块，通过在第二降噪模块222中设置适用于颈后端佩戴方式的算法同样能够最大限度的达到上行降噪的目的。
上述仅仅只是以语音信号到达通话麦克风、第一麦克风、第二麦克风、第三麦克风和第四麦克风的时间差异对降噪模块的降噪原理进行简单说明，至于根据语音信号的能量值差异和灵敏度差异与时间差异的降噪原理相类似，在此不再一一赘述。
进一步地，在线控外壳上还设置有转换开关24，此转换开关可以是线控开关也可以是触发开关，通过该转换开关在第一降噪模块和第二降噪模块之间切换，以方便用户对降噪模块进行适应性选择。即：当为颈前端佩戴方式时，则切换为采用第一降噪模块进行上行降噪；当为颈后端佩戴方式时，则切换为采用第二降噪模块进行上行降噪。或者，转换开关24也可以在降噪模块22内。
此外，在本发明提供的上行降噪耳机中，在左耳前壳体34内设置有左耳喇叭36，在左耳前壳体34的端部附接有左耳道管37；在右耳前壳体44内设置有右耳喇叭46，在右耳前壳体的端部附接有右耳道管47。左耳道管37和右耳道管47分别插入人体的左耳和右耳内，以使左耳喇叭36和右耳喇叭46发出的声音分别通过左耳道管和右耳道管进入人体的左耳和右耳内。
另外，在本发明中，上述的通话麦克风为ANC(Active Noise Control，主动噪声控制系统)麦克风、电容式麦克风或者电动式麦克风；上述的第一麦克风、第二麦克风、第三麦克风和第四麦克风为ANC麦克风。
通过上述，本发明提供的上行降噪耳机能够最大限度对颈线式耳机进行
上行降噪处理，从而提高语音通话的质量；并且，针对不同的佩戴方式设置不同的降噪算法，能够增强颈线式耳机的实用性，从而在提高语音通话质量的同时，提升用户的使用体验。
如上参照附图以示例的方式描述根据本发明的上行降噪耳机。但是，本领域技术人员应当理解，对于上述本发明所提出的上行降噪耳机，还可以在不脱离本发明内容的基础上做出各种改进。因此，本发明的保护范围应当由所附的权利要求书的内容确定。
Claims (9)
- 一种上行降噪耳机，包括设置在耳机线上的耳机线控，以及分别连接在所述耳机线两端的左耳机壳体和右耳机壳体；其特征在于，在所述耳机线控内设置有通话麦克风和降噪模块；在所述左耳机壳体内设置有第一麦克风和第二麦克风，所述第一麦克风到所述通话麦克风的距离大于所述第二麦克风到所述通话麦克风的距离；在所述右耳机壳体内设置有第三麦克风和第四麦克风，所述第三麦克风到所述通话麦克风的距离大于所述第四麦克风到所述通话麦克风的距离；并且，所述第三麦克风在所述右耳机壳体内的位置与所述第一麦克风在所述左耳机壳体内的位置相对称，所述第四麦克风在所述右耳机壳体内的位置与所述第二麦克风在所述左耳机壳体内的位置相对称；所述降噪模块用于获取所述通话麦克风、所述第一麦克风、所述第二麦克风、所述第三麦克风和所述第四麦克风所拾取的语音信号，并将所获取到的语音信号中的噪声信号进行消除。
- 如权利要求1所述的上行降噪耳机，其中，所述耳机线控包括线控外壳，所述通话麦克风和所述降噪模块均设置在所述线控外壳内；其中，所述降噪模块根据所述语音信号到达所述通话麦克风、所述第一麦克风、所述第二麦克风、所述第三麦克风和所述第四麦克风的时间差异，对所述语音信号中的噪声信号进行消除。
- 如权利要求1所述的上行降噪耳机，其中，所述耳机线控包括线控外壳，所述通话麦克风和所述降噪模块均设置在所述线控外壳内；其中，所述降噪模块根据所述通话麦克风、所述第一麦克风、所述第二麦克风、所述第三麦克风和所述第四麦克风所拾取到的语音信号的能量值差异，对所述语音信号中的噪声信号进行消除。
- 如权利要求1所述的上行降噪耳机，其中，耳机线控包括线控外壳，所述通话麦克风和所述降噪模块均设置在所述线控外壳内；其中，所述降噪模块根据所述通话麦克风、所述第一麦克风、所述第二麦克风、所述第三麦克风和所述第四麦克风所拾取到的语音信号的灵敏度差异，对所述语音信号中的噪声信号进行消除。
- 如权利要求1所述的上行降噪耳机，其中，所述降噪模块包括第一降噪模块和第二降噪模块；其中，所述第一降噪模块用于在所述通话麦克风位于颈前端时，对所述通话麦克风、所述第一麦克风、所述第二麦克风、所述第三麦克风和所述第四麦克风所拾取到的语音信号中的噪声信号进行消除；所述第二降噪模块用于在所述通话麦克风位于颈后端时，对所述通话麦克风、所述第一麦克风、所述第二麦克风、所述第三麦克风和所述第四麦克风所拾取到的语音信号中的噪声信号进行消除。
- 如权利要求5所述的上行降噪耳机，其中，在所述线控外壳上设置有转换开关，通过所述转换开关在所述第一降噪模块和所述第二降噪模块之间切换。
- 如权利要求1所述的上行降噪耳机，其中，所述左耳机壳体包括左耳主壳体、左耳前壳体和与所述左耳主壳体相连的左耳导线部，且所述左耳导线部与所述左耳前壳体分别位于所述左耳主壳体的两端部；其中，所述第一麦克风设置在所述左耳主壳体内靠近所述左耳前壳体的位置，所述第二麦克风设置在所述左耳主壳体内靠近所述左耳导线部的位置。
- 如权利要求1所述的上行降噪耳机，其中，所述右耳机壳体包括右耳主壳体、右耳前壳体和与所述右耳主壳体相连的右耳导线部，且所述右耳导线部与所述右耳前壳体分别位于所述右耳主壳 体的两端部；其中，所述第三麦克风设置在所述右耳主壳体内靠近所述右耳前壳体的位置，所述第四麦克风设置在所述右耳主壳体内靠近所述右耳导线部的位置。
- 如权利要求1所述的上行降噪耳机，其中，所述通话麦克风为主动噪声控制系统麦克风、电容式麦克风或者电动式麦克风；所述第一麦克风、所述第二麦克风、所述第三麦克风和所述第四麦克风为主动噪声控制系统麦克风。
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