WO2018149073A1 - Casque d'écoute antibruit et dispositif électronique - Google Patents

Casque d'écoute antibruit et dispositif électronique Download PDF

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Publication number
WO2018149073A1
WO2018149073A1 PCT/CN2017/089577 CN2017089577W WO2018149073A1 WO 2018149073 A1 WO2018149073 A1 WO 2018149073A1 CN 2017089577 W CN2017089577 W CN 2017089577W WO 2018149073 A1 WO2018149073 A1 WO 2018149073A1
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WO
WIPO (PCT)
Prior art keywords
microphone
noise
sound
main
noise reduction
Prior art date
Application number
PCT/CN2017/089577
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English (en)
Chinese (zh)
Inventor
赵燕鹏
谢萍
Original Assignee
歌尔股份有限公司
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Publication of WO2018149073A1 publication Critical patent/WO2018149073A1/fr

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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
    • H04R1/1058—Manufacture or assembly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/10—Details of earpieces, attachments therefor, earphones or monophonic headphones covered by H04R1/10 but not provided for in any of its subgroups
    • H04R2201/105—Manufacture of mono- or stereophonic headphone components

Definitions

  • the present invention relates to the field of earphone technology, and more particularly to a noise canceling earphone and an electronic device to which the noise canceling earphone is applied.
  • wireless earphones generally have an uplink noise reduction function, and uplink noise reduction is call noise reduction.
  • uplink noise reduction is call noise reduction.
  • the microphone receives the speech signal of the speaker and the noise signal of the surrounding environment, and the above two signals are transmitted to the noise reduction chip, and the noise reduction algorithm is used to filter out the environmental noise signal to ensure that the other party can still listen. To a clear voice signal.
  • the call noise reduction function is usually implemented by a single microphone/double microphone noise reduction algorithm.
  • the principle of the dual-mike noise reduction algorithm is as follows: the microphone close to the speaker's mouth is the main microphone, which is mainly used to pick up the human voice signal; the microphone near the human ear is the secondary microphone, which is mainly used for picking up noise and voice signals.
  • the time when the speech signal reaches the main and sub-microphones is different due to the difference in distance, and the noise reduction algorithm performs noise suppression according to the time difference.
  • the noise reduction performance of the microphone array There are two key parameters for the noise reduction performance of the microphone array: one is the distance between the primary and secondary microphones, and the other is the angle between the secondary microphone array connection and the voice source (such as the mouth) to be enhanced.
  • the distance between the main and sub-microphones is large, and the angle between the main and sub-microphones is small, so the noise reduction performance is good, and vice versa.
  • the distance from the product to the mouth is far, and the conventional distance from the external ear canal to the center of the lips is about 130mm. This is also the distance between the center of the earphone wireless microphone or the microphone array to the center of the lip; 2. The center of the microphone or microphone array is almost picked up from the center of the lip, and the microphone array is connected to the microphone due to the stability requirements.
  • the angle of the line between the array and the center of the lips is usually larger than 30 degrees.
  • the current wireless earphones are small in size, and the distance between the primary and secondary microphones is difficult to meet the minimum distance. From the request. Due to the size of the main microphone, the main microphone is far from the mouth and the call quality is not good.
  • a noise canceling earphone includes a headphone housing, a main microphone, a noise reduction microphone and a main control chip, the main microphone, the noise reduction microphone and the main control chip are disposed in the earphone housing, the main microphone and the main microphone a noise reduction microphone is communicatively coupled to the main control chip, the main microphone is in communication with an external environment through a first sound tube, and the noise reduction microphone is in communication with an external environment through a second sound tube, the first sound tube Separated from the second sound tube.
  • a printed circuit board integrated with the main control chip is further included, and the main microphone and the noise reduction microphone are connected to the printed circuit board.
  • the first open end of the first sound tube is located at the bottom of the earphone housing.
  • the second open end of the second sound tube is located at the top of the earphone housing.
  • an inner diameter of at least one of the first sound tube and the second sound tube is configured to gradually decrease from an open end to an end connected to the microphone.
  • the noise reduction microphones are multiple, each of the noise reduction microphones is in communication with an external environment through a respective second sound tube, and the plurality of second sound tubes are isolated from each other.
  • a distance between the first open end of the first sound tube and the second open end of the second sound tube is greater than or equal to 20 mm.
  • the first open end of the first sound tube is disposed opposite to the second open end of the second sound tube.
  • a sensor is further disposed on the earphone housing and communicatively coupled to the main control chip, the sensor being configured to contact a user's ear to pick up bone conduction speech The signal is sent to the master chip.
  • an electronic device includes the noise canceling earphone provided by the present invention.
  • the inventors of the present invention have found that in the prior art, the size of the wireless earphone is small, and the distance between the primary and secondary microphones is difficult to meet the minimum distance requirement. And subject to the size of the main microphone, The main microphone is far from the mouth and the call quality is not good. Therefore, the technical task to be achieved by the present invention or the technical problem to be solved is not thought of or expected by those skilled in the art, so the present invention is a new technical solution.
  • the noise canceling earphone provided by the invention can improve the distance between the main microphone and the noise canceling microphone by setting the path and the length of the first sound guiding tube and the second sound guiding tube, thereby making the noise reduction effect of the noise canceling earphone Better, improve the signal to noise ratio.
  • the angle between the microphone array connection and the microphone-mouth connection can be made smaller.
  • the noise reduction effect is further improved.
  • FIG. 1 is a schematic structural view of a noise canceling earphone according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a noise canceling earphone when worn according to an embodiment of the present invention.
  • FIG. 3 is a flow chart of a noise reduction process in accordance with an embodiment of the present invention.
  • 11 earplug; 12: rear cavity; 13: front sound tube; 14: PCB; 15: main microphone; 16: noise canceling microphone; 17: sensor; 18: first sound tube; 19: first open end; 20: second sound tube; 21: second open end; 22: main control chip; 23: dustproof member; 24: skin inside the ear canal.
  • a noise canceling earphone is provided.
  • the noise canceling earphone can be a wireless earphone or a wired earphone. Since the setting space of the wireless earphone is smaller, the noise canceling earphone is particularly suitable for the wireless earphone.
  • the noise canceling earphone can be an in-ear earphone, an over-ear earphone or a headset.
  • the noise canceling earphone includes a headphone housing, a main microphone 15, a noise canceling microphone 16, and a main control chip 22.
  • the main microphone 15, the noise reduction microphone 16, and the main control chip 22 are disposed in the earphone housing.
  • the main microphone 15 and the noise reduction microphone 16 are communicatively coupled to the main control chip 22.
  • the main microphone 15 is used to pick up a voice signal and transmit the signal to the master chip 22.
  • the main microphone 15 inevitably picks up and transmits a noise signal.
  • the noise reduction microphone 16 is used to pick up the voice signal and the noise signal of the surrounding environment, and send the two signals to the master chip 22.
  • the master chip 22 receives signals from the main microphone 15 and the noise reduction microphone 16, performs noise reduction according to the noise reduction algorithm, and enhances the voice signal.
  • the main control chip 22 is further configured to send the noise reduction processed voice signal to the mobile terminal for playing by the mobile terminal. For example, send it to a smartphone, tablet, etc.
  • the noise reduction algorithm is a conventional technical means in the art, and those skilled in the art can select a noise reduction algorithm according to actual needs, which will not be described in detail herein.
  • the main microphone 15 is in communication with the external environment through the first sound tube 18.
  • the noise reduction microphone 16 communicates with the external environment through the second sound tube 20, and the first sound tube 18 and the second sound tube 20 are isolated from each other.
  • the noise canceling earphone provided by the present invention can increase the distance between the main microphone 15 and the noise canceling microphone 16 by setting the path and length of the first sound guiding tube 18 and the second sound guiding tube 20. Therefore, the noise reduction effect of the noise canceling earphone is better, and the signal to noise ratio is improved.
  • the distance between the first open end 19 of the first sound tube 18 and the second open end 21 of the second sound tube 20 is greater than or equal to 20 mm. This distance ensures good noise reduction.
  • the angle between the microphone array connection and the microphone-mouth connection can be made. It becomes smaller and further improves the noise reduction effect.
  • the main microphone 15 and the noise reduction microphone 16 are respectively communicated with the outside through the sound tube, the arrangement of the main microphone 15 and the noise reduction microphone 16 can be free from the installation space.
  • the person skilled in the art can set the first open end 19 of the first sound guiding tube 18 to an arbitrary position to be close to the mouth of the user, thereby improving the pickup of the main microphone 15. The effect of the voice.
  • FIG. 1 is a schematic structural view of a noise canceling earphone according to an embodiment of the present invention.
  • the noise canceling earphone is a wireless earphone.
  • the earphone housing is an earplug.
  • the inside of the earplug has a receiving space.
  • the accommodation space is divided into a rear chamber 12 and a front sound tube 13 that communicates with the rear chamber 12.
  • the rear chamber 12 is for accommodating various components and can improve the low frequency effect of the noise canceling headphone, and the front sound tube 13 communicates with a speaker (not shown) to transmit sound.
  • a power supply assembly and a switch are also disposed within the rear chamber 12.
  • the power supply assembly includes a lithium ion battery.
  • the lithium ion battery supplies power to the speaker, the main microphone 15, the noise reduction microphone 16, and the main control chip 22 through the power management circuit.
  • the noise canceling headphone further includes a printed wiring board (PCB 14) integrated with the master chip 22.
  • the main microphone 15 and the noise reduction microphone 16 are connected to the printed wiring board.
  • the PCB 14 makes the communication effect between the main microphone 15, the noise reduction microphone 16, and the main control chip 22 better.
  • the main control chip 22 may select a DSP (Digital Signal Processing) chip, or another chip with a storage function, and the corresponding algorithm program may be written into the main control chip 22.
  • DSP Digital Signal Processing
  • the main microphone 15 and the noise reduction microphone 16 can be directly fixed at any position of the PCB 14 according to actual needs, thereby being free from the installation space.
  • two microphones are set Placed on the same side of the PCB 14 to facilitate the placement of two sound tubes in communication with the two microphones.
  • the speaker is also integrated into the PCB 14 board, and the speaker is communicatively coupled to the master chip 22.
  • the first sound tube 18 and the second sound tube 20 are each arranged in an arc shape.
  • the curved structure has a smooth path to facilitate the transmission of sound signals (including speech signals and noise signals) in the two sound tubes.
  • the two sound tubes may also be provided in a shape such as a spiral shape, a polygonal line shape, a wavy line shape or the like.
  • the inner diameter of at least one of the first sound tube 18 and the second sound tube 20 is configured to gradually decrease from the open end to the end that is coupled to the microphone.
  • the first sound tube 18 and the second sound tube 20 are each provided in a structure having a reduced diameter. Both sound tubes are circular in cross section.
  • the diameter of the first sound guiding tube 18 is gradually reduced from the first open end 19 toward the main microphone 15, and the diameter of the second sound guiding tube 20 is gradually reduced from the second open end 21 toward the noise canceling microphone 16.
  • This structure is similar to a trumpet shape, which guarantees good sound and noise pickup quality.
  • FIG. 3 is a flow chart of a noise reduction process in accordance with an embodiment of the present invention.
  • the main microphone 15 when the main microphone 15 is picked up, the sound signal sequentially passes through the first open end 19, the first sound tube 18, and the main microphone 15 to reach the main control chip 22.
  • the noise reduction microphone 16 picks up, the sound signal sequentially passes through the second open end 21, the second sound tube 20, and the noise reduction microphone 16 to reach the main control chip 22.
  • the main control chip 22 processes the two signals according to the built-in noise reduction algorithm, and finally reduces the noise to obtain a speech signal.
  • a dustproof member 23 is provided in at least one of the first sound guiding tube 18 and the second sound guiding tube 20.
  • dustproof members 23 are provided in both of the sound tubes to prevent dust from entering.
  • the dustproof member 23 may be, but not limited to, a foam, a sponge, or the like.
  • the first open end 19 of the first sound tube 18 is located at the bottom of the earphone housing. This position is close to the user's mouth, which makes the pickup of the voice better.
  • the second open end 21 of the second sound tube 20 is located at the top of the earphone housing. This position guarantees the quality of noise pickup. Moreover, when the first open end 19 is at the bottom, the distance between the second open end 21 and the first open end 19 is the largest, which avoids the mutual influence of the two, and can ensure a good noise reduction effect.
  • the first open end 19 of the first sound tube 18 is disposed opposite the second open end 21 of the second sound tube 20. This setting can effectively avoid the mutual influence of the two microphones.
  • the noise canceling microphone 16 also includes a sensor 17.
  • the sensor 17 is disposed on the earphone housing and is communicatively coupled to the main control chip 22.
  • the sensor 17 is configured to contact the ear of the user to pick up the bone conduction voice signal and transmit the voice signal to the master chip 22.
  • the sensor 17 is disposed within the front sound tube 13. When the earplug is inserted into the ear canal, the sensor 17 is in contact with the skin 24 inside the ear canal.
  • the user sends a voice signal, and the vibration of the vocal cords is transmitted to the human ear through bone conduction, which causes the capillary changes in the human ear to change accordingly.
  • the sensor 17 is in close contact with the human ear, picks up the change of the blood information caused by the voice utterance, and transmits the picked up blood information to the main control chip 22 in the earplug.
  • the main control chip 22 analyzes the blood information to finally obtain the user's voice signal. Since the blood signal does not fluctuate due to strong external noise, the indirect acquisition of the speech signal by the sensor 17 can ensure the accurate transmission of the speech signal and avoid the influence of the external noise signal on the call quality.
  • the master chip 22 optimizes the voice signal picked up by the sensor 17 and the voice signal picked up by the main microphone 15, and finally obtains an accurate voice signal. This method improves the accuracy of voice signal pickup.
  • the noise reduction microphones 16 are plural, and each of the noise reduction microphones 16 is provided with a second sound guiding tube, and the plurality of second sound guiding tubes are isolated from each other.
  • a plurality of noise reduction microphones 16 are integrated onto the PCB 14.
  • the second open ends 21 of the plurality of second sound guiding tubes are arranged on the same line, and the plurality of second open ends 21 are arranged on the same line as the first open end 19 of the first sound guiding tube. This makes the speech signal picked up by the noise canceling microphone 16 more accurate.
  • the adjacent second open ends 21 are spaced apart by a set distance or a set angle to make the picked up noise signal and voice signal more accurate.
  • the noise signal and the voice signal picked up by the plurality of noise reduction microphones 16 are processed by the DSP to obtain a more accurate noise signal. Then through the DSP built-in noise reduction algorithm, the noise signal is finally eliminated, and a clearer and more accurate voice signal is obtained.
  • an electronic device includes the noise canceling earphone provided by the present invention.
  • the electronic device can be, but is not limited to, a mobile phone, a notebook computer, Tablets, radios, smart watches, smart glasses, PSPs, virtual reality devices (VRs) or augmented reality devices (ARs).
  • VRs virtual reality devices
  • ARs augmented reality devices
  • the electronic device has the characteristics of good voice effect.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Telephone Set Structure (AREA)

Abstract

L'invention concerne un casque d'écoute antibruit et un dispositif électronique. Le casque d'écoute antibruit comprend un boîtier de casque d'écoute, un microphone principal (15), un microphone antibruit (16) et une puce de commande principale (22). Le microphone principal (15), le microphone antibruit (16) et la puce de commande principale (22) sont disposés à l'intérieur du boîtier de casque d'écoute. Le microphone principal (15) et le microphone antibruit (16) sont en liaison de communication avec la puce de commande principale (22). Le microphone principal (15) est en communication avec un environnement extérieur au moyen d'un premier tube conducteur de son (18). Le microphone antibruit (16) est en communication avec l'environnement extérieur au moyen d'un second tube conducteur de son (20). Le premier tube conducteur de son (18) et le second tube conducteur de son (20) sont isolés l'un de l'autre. Dans le casque d'écoute antibruit, une distance entre le microphone principal (15) et le microphone antibruit (16) peut être augmentée, ce qui permet d'augmenter un rapport signal sur bruit. Le dispositif électronique comprend le casque d'écoute antibruit.
PCT/CN2017/089577 2017-02-14 2017-06-22 Casque d'écoute antibruit et dispositif électronique WO2018149073A1 (fr)

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CN201710079078.0A CN106658265B (zh) 2017-02-14 2017-02-14 降噪耳机以及电子设备
CN201710079078.0 2017-02-14

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106658265B (zh) * 2017-02-14 2023-09-12 歌尔股份有限公司 降噪耳机以及电子设备
CN107071683A (zh) * 2017-06-22 2017-08-18 歌尔股份有限公司 无线通信耳机检测装置和方法
CN107426643B (zh) * 2017-07-31 2019-08-23 歌尔股份有限公司 上行降噪耳机

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CN104394490A (zh) * 2014-10-30 2015-03-04 中名(东莞)电子有限公司 具有降噪效果的入耳式耳机
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