CN219876024U - Bluetooth headset ANC noise reduction circuit and TWS Bluetooth headset - Google Patents
Bluetooth headset ANC noise reduction circuit and TWS Bluetooth headset Download PDFInfo
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- CN219876024U CN219876024U CN202320984574.1U CN202320984574U CN219876024U CN 219876024 U CN219876024 U CN 219876024U CN 202320984574 U CN202320984574 U CN 202320984574U CN 219876024 U CN219876024 U CN 219876024U
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- 230000006698 induction Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 4
- 238000013528 artificial neural network Methods 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 8
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Abstract
The utility model discloses a Bluetooth headset ANC noise reduction circuit and a TWS Bluetooth headset, comprising: the device comprises a Bluetooth main control unit, a DSP unit, a DAC power amplification unit, a driving unit, an antenna unit and an ANC noise reduction unit, wherein the DSP unit is connected with the Bluetooth main control unit, the output end of the DSP unit is connected with the input end of the DAC power amplification unit, the output end of the DAC power amplification unit is connected with the input end of the driving unit, the antenna unit is connected with the Bluetooth main control unit, the antenna unit is used for receiving and transmitting signals, the output end of the ANC noise reduction unit is connected with the input end of the DSP unit for feeding back noise signals, the ANC noise reduction unit is used for collecting noise in the environment and feeding back the noise signals to the DSP unit, the DSP unit outputs sound waves with the same amplitude frequency and opposite phases with the noise through the DAC power amplification unit and the driving unit, the noise is counteracted, and the DSP unit realizes real-time noise reduction based on a neural network and has good noise reduction effect.
Description
Technical Field
The utility model relates to the technical field of Bluetooth headphones, in particular to an ANC noise reduction circuit of a Bluetooth headphone and a TWS Bluetooth headphone.
Background
The Bluetooth headset is to apply the Bluetooth technology to the hands-free headset, so that a user can avoid the trouble of annoying wires and can easily talk in various modes. TWS is the meaning of true wireless stereophonic sound, TWS technology is also based on development of Bluetooth chip technology, according to the working principle of the TWS technology, the mobile phone is connected with a main earphone, the main earphone is connected with an auxiliary earphone in a wireless mode, the main earphone is connected with the auxiliary earphone in a wireless mode, true wireless separation of left and right channels of Bluetooth is achieved, when a slave sound box is not connected, the main sound box returns to mono tone quality, the TWS technology is applied to the field of Bluetooth earphones, and therefore a new TWS Bluetooth earphone product is also induced. However, the existing Bluetooth headset performs noise reduction treatment through a Bluetooth chip, and the noise reduction effect is poor.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the ANC noise reduction circuit of the Bluetooth headset and the TWS Bluetooth headset, which can solve the problem that the traditional Bluetooth headset is poor in noise reduction effect.
According to an embodiment of the first aspect of the present utility model, a Bluetooth headset ANC noise reduction circuit includes:
a Bluetooth main control unit;
the DSP unit is connected with the Bluetooth main control unit;
the output end of the DSP unit is connected with the input end of the DAC power amplification unit;
the output end of the DAC power amplification unit is connected with the input end of the driving unit;
the antenna unit is connected with the Bluetooth main control unit;
and the output end of the ANC noise reduction unit is connected with the input end of the DSP unit and is used for feeding back noise signals.
The Bluetooth headset ANC noise reduction circuit provided by the embodiment of the first aspect of the utility model has at least the following beneficial effects:
noise in the environment is collected through the ANC noise reduction unit, noise signals are fed back to the DSP unit, the DSP unit outputs sound waves with the same amplitude frequency as the noise and opposite phases through the DAC power amplification unit and the driving unit, the noise is counteracted, and the DSP unit realizes real-time noise reduction based on the neural network. According to the Bluetooth headset ANC noise reduction circuit, compared with a traditional Bluetooth headset, the noise reduction effect is good.
According to some embodiments of the utility model, the ANC noise reduction unit comprises a feedforward microphone module, a first feedback microphone module and a second feedback microphone module, wherein the output end of the feedforward microphone module is connected with the input end of the DSP unit, the output end of the first feedback microphone module is connected with the input end of the DSP unit, and the output end of the second feedback microphone module is connected with the input end of the DSP unit.
According to some embodiments of the utility model, the ANC noise reduction unit further comprises a bone conduction module, an output of which is connected to an input of the DSP unit.
According to some embodiments of the utility model, the system further comprises a call microphone unit, wherein an output end of the call microphone unit is connected with an input end of the DSP unit.
According to some embodiments of the utility model, the Bluetooth master control unit further comprises a touch detection unit, wherein an output end of the touch detection unit is connected with an input end of the Bluetooth master control unit.
According to some embodiments of the utility model, the Bluetooth master control unit further comprises a position sensing unit, wherein an output end of the position sensing unit is connected with an input end of the Bluetooth master control unit.
According to some embodiments of the utility model, the bluetooth master control unit further comprises a magnetic induction switch unit, wherein an output end of the magnetic induction switch unit is connected with an input end of the bluetooth master control unit.
According to a second aspect of the utility model, a TWS Bluetooth headset includes a Bluetooth headset ANC noise reduction circuit as described above.
According to the TWS Bluetooth headset provided by the embodiment of the second aspect of the utility model, the TWS Bluetooth headset has at least the following beneficial effects:
noise in the environment is collected through the ANC noise reduction unit, noise signals are fed back to the DSP unit, the DSP unit outputs sound waves with the same amplitude frequency as the noise and opposite phases through the DAC power amplification unit and the driving unit, the noise is counteracted, and the DSP unit realizes real-time noise reduction based on the neural network. According to the TWS Bluetooth headset provided by the embodiment of the second aspect of the utility model, compared with the traditional Bluetooth headset, the TWS Bluetooth headset has a good noise reduction effect.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The utility model is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a functional block diagram of the present utility model;
fig. 2 is a circuit diagram of a DAC power amplifier unit according to the present utility model;
FIG. 3 is a circuit diagram of a feed-forward microphone module and a talk microphone unit of the utility model;
fig. 4 is a circuit diagram of a first feedback microphone module and a second feedback microphone module according to the utility model;
fig. 5 is a circuit diagram of a bone conduction module according to the present utility model;
fig. 6 is a circuit diagram of a touch detection unit of the present utility model;
FIG. 7 is a circuit diagram of a position sensing unit according to the present utility model;
fig. 8 is a circuit diagram of a magnetic induction switching unit of the present utility model.
Reference numerals:
a Bluetooth main control unit 100,
A DSP unit 200,
DAC power amplifier unit 300, driving unit 310,
An antenna unit 400,
A feedforward microphone module 500, a first feedback microphone module 510, a second feedback microphone module 520,
Bone conduction module 530,
A communication microphone unit 600,
A touch detection unit 700,
A position sensing unit 800,
A magnetic induction switching unit 900.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, plural means two or more. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
A bluetooth headset ANC noise reduction circuit according to an embodiment of the utility model is described below with reference to fig. 1 to 8.
As shown in fig. 1, a bluetooth headset ANC noise reduction circuit according to an embodiment of the present utility model includes: the Bluetooth power amplifier comprises a Bluetooth main control unit 100, a DSP unit 200, a DAC power amplifier unit 300, a driving unit 310, an antenna unit 400 and an ANC noise reduction unit, wherein the DSP unit 200 is connected with the Bluetooth main control unit 100, the output end of the DSP unit 200 is connected with the input end of the DAC power amplifier unit 300, the output end of the DAC power amplifier unit 300 is connected with the input end of the driving unit 310, the antenna unit 400 is connected with the Bluetooth main control unit 100, the antenna unit 400 is used for receiving and transmitting signals, and the output end of the ANC noise reduction unit is connected with the input end of the DSP unit 200 for feeding back noise signals.
Noise in the environment is collected through the ANC noise reduction unit and noise signals are fed back to the DSP unit 200, the DSP unit 200 outputs sound waves with the same amplitude frequency and opposite phases with the noise through the DAC power amplification unit 300 and the driving unit 310, the noise is counteracted, and the DSP unit 200 realizes real-time noise reduction based on a neural network. Compared with the traditional Bluetooth headset, the Bluetooth headset ANC noise reduction circuit provided by the embodiment of the utility model has a good noise reduction effect.
It should be noted that, the bluetooth master control unit 100 adopts a bluetooth chip U1 with a model number QCC 5171. The DSP unit 200 employs a neural network acceleration chip U8 of model GAP 9. As shown in fig. 2, the DAC power amplifier unit 300 employs an amplifier U11 of the model SSM6515BCBZRL 7. The pin PIO35 of the Bluetooth chip U1 is connected with the pin SPI1_SCK/GPIO33/USART3_CLK of the neural network acceleration chip U8, the pin PIO36 of the Bluetooth chip U1 is connected with the pin SPI1_SDO/GPIO38 of the neural network acceleration chip U8, the pin PIO37 of the Bluetooth chip U1 is connected with the pin SPI1_SDI/GPIO39 of the neural network acceleration chip U8, and the pin PIO38 of the Bluetooth chip U1 is connected with the pin SPI1_CS0/GPIO34 of the neural network acceleration chip U8. The pin SAI2_SCK/GPIO56/SPI2_SCK of the neural network acceleration chip U8 is connected with the pin BCLK of the amplifier U11, the pin SAI2_SDI/GPIO58/SPI2_SDI of the neural network acceleration chip U8 is connected with the pin SDATAI of the amplifier U11,
as shown in fig. 1, the ANC noise reduction unit includes a feedforward microphone module 500, a first feedback microphone module 510, and a second feedback microphone module 520, wherein an output end of the feedforward microphone module 500 is connected to an input end of the DSP unit 200, an output end of the first feedback microphone module 510 is connected to an input end of the unit, and an output end of the second feedback microphone module 520 is connected to an input end of the DSP unit 200. The feedforward miaow module 500 gathers the outside environmental noise of earphone and feeds back noise signal and give the DSP unit 200, and first feedback miaow module 510 and second feedback miaow module 520 gather the interior remaining noise of ear canal and feed back noise signal and give the DSP unit 200, realize intelligent mixed noise reduction through feedforward miaow module 500, first feedback miaow module 510 and second feedback miaow module 520, and noise reduction effect is good.
It should be noted that, as shown in fig. 3 to 4, the feedforward microphone module 500 is a feedforward microphone MIC3, the first feedback microphone module 510 is a first feedback microphone MIC2, the second feedback microphone module 520 is a second feedback microphone MIC4, an output end of the feedforward microphone MIC3 is connected to a pin sai1_sdio/GPIO 54/SPI2_cs2/SPI2 and a pin sai1_sck/GPIO52 of the neural network accelerator chip U8, an output end of the first feedback microphone MIC2 is connected to a pin sai1_sck/GPIO52 and a pin sai1_sdo/GPIO55/SPI2_cs3/SPI2_sdio3 of the neural network accelerator chip U8, and an output end of the second feedback microphone MIC4 is connected to a pin sai1_sck/GPIO52 and a pin sai1_sdo/GPIO55/SPI2_cs3/SPI 2_os3 of the neural network accelerator chip U8.
As shown in fig. 1, the ANC noise reduction unit further includes a bone conduction module 530, wherein an output end of the bone conduction module 530 is connected to an input end of the DSP unit 200, and human body sounds are collected by the bone conduction module 530 for noise reduction.
It should be noted that, as shown in fig. 5, the bone conduction module 530 adopts the bone conduction chip U7 of VPU14DB01A-ToR, the pin DATA of the bone conduction chip U7 is connected to the pin sai2_sdo/GPIO59/SPI2_sdo of the neural network accelerator chip U8, and the pin CLK of the bone conduction chip U7 is connected to the pin sai2_sck/GPIO56/SPI2_sck of the neural network accelerator chip U8.
As shown in fig. 1, the microphone unit 600 is further included, an output end of the microphone unit 600 is connected to an input end of the DSP unit 200, and the microphone unit 600 collects the sound of the call and feeds back the sound signal to the DSP unit 200.
It should be noted that, as shown in fig. 3, the microphone unit 600 is a microphone MIC1, and an output end of the microphone MIC1 is connected to a pin i2c0_scl/GPIO41 of the neural network acceleration chip U8.
As shown in fig. 1, the portable electronic device further comprises a touch detection unit 700, wherein an output end of the touch detection unit 700 is connected with an input end of the bluetooth main control unit 100, the touch unit feeds back a touch signal to the bluetooth main control unit 100, and the touch detection unit 700 detects a touch action of a user, so that the portable electronic device is convenient for the user to operate.
As shown in fig. 6, the touch detection unit 700 uses a touch detection chip U3 with a model number of TTP233D-KB8-DFN8L, and a pin OPDO of the touch detection chip U3 is connected to a pin PIO3 of the bluetooth chip U1.
As shown in fig. 1, the portable electronic device further comprises a position sensing unit 800, wherein an output end of the position sensing unit 800 is connected with an input end of the bluetooth main control unit 100, the position sensing unit 800 senses that an ear is close to or far away from and feeds back to the bluetooth main control unit 100, and when the portable electronic device is in the ear, an audio file is played, when the portable electronic device is out of the ear, the audio file is paused, so that power consumption is reduced, and the endurance time is increased.
It should be noted that, as shown in fig. 7, the position sensing unit 800 adopts an infrared sensor U10 with a model number PX318J, a pin INT of the infrared sensor U10 is connected to a pin PIO2 of the bluetooth chip U1, a pin SCL of the infrared sensor U10 is connected to a pin PIO20 of the bluetooth chip U1, and a pin SDA of the infrared sensor U10 is connected to a pin PIO15 of the bluetooth chip U1.
As shown in fig. 1, the earphone also comprises a magnetic induction switch unit 900, wherein an output end of the magnetic induction switch unit 900 is connected with an input end of the bluetooth main control unit 100, and magnetic field changes are induced by the magnetic induction switch unit 900, so that the earphone is started and shut down.
It should be noted that, as shown in fig. 8, the magnetic induction switch unit 900 adopts a hall switch chip U6 with a model OCH1602SEV4AD, and a pin OUTPUT of the hall switch chip U6 is connected to a pin sys_ctrl of the bluetooth chip U1.
The TWS Bluetooth headset according to the embodiment of the utility model comprises the Bluetooth headset ANC noise reduction circuit.
According to the TWS Bluetooth headset provided by the embodiment of the utility model, the ANC noise reduction unit is used for collecting noise in the environment and feeding back noise signals to the DSP unit 200, the DSP unit 200 outputs sound waves with the same amplitude frequency and opposite phases with the noise through the DAC power amplification unit 300 and the driving unit 310, the noise is counteracted, and the DSP unit 200 realizes real-time noise reduction based on a neural network. According to the TWS Bluetooth headset according to the embodiment of the present utility model, compared with the conventional Bluetooth headset, the noise reduction effect is good by processing the noise signal through the DSP unit 200.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.
Claims (8)
1. Bluetooth headset ANC circuit of making an uproar falls, its characterized in that includes:
a Bluetooth master control unit (100);
the DSP unit (200), the said DSP unit (200) connects the said bluetooth master control unit (100);
the output end of the DSP unit (200) is connected with the input end of the DAC power amplification unit (300);
the output end of the DAC power amplification unit (300) is connected with the input end of the driving unit (310);
an antenna unit (400), wherein the antenna unit (400) is connected with the Bluetooth main control unit (100);
and the output end of the ANC noise reduction unit is connected with the input end of the DSP unit (200) and is used for feeding back noise signals.
2. The bluetooth headset ANC noise reduction circuit according to claim 1, wherein: the ANC noise reduction unit comprises a feedforward microphone module (500), a first feedback microphone module (510) and a second feedback microphone module (520), wherein the output end of the feedforward microphone module (500) is connected with the input end of the DSP unit (200), the output end of the first feedback microphone module (510) is connected with the input end of the DSP unit (200), and the output end of the second feedback microphone module (520) is connected with the input end of the DSP unit (200).
3. The bluetooth headset ANC noise reduction circuit according to claim 2, wherein: the ANC noise reduction unit further comprises a bone conduction module (530), and the output end of the bone conduction module (530) is connected with the input end of the DSP unit (200).
4. The bluetooth headset ANC noise reduction circuit according to claim 1, wherein: the intelligent communication device further comprises a communication microphone unit (600), wherein the output end of the communication microphone unit (600) is connected with the input end of the DSP unit (200).
5. The bluetooth headset ANC noise reduction circuit according to claim 1, wherein: the Bluetooth master control unit further comprises a touch detection unit (700), wherein the output end of the touch detection unit (700) is connected with the input end of the Bluetooth master control unit (100).
6. The bluetooth headset ANC noise reduction circuit according to claim 1, wherein: the Bluetooth master control unit further comprises a position sensing unit (800), wherein the output end of the position sensing unit (800) is connected with the input end of the Bluetooth master control unit (100).
7. The bluetooth headset ANC noise reduction circuit according to claim 1, wherein: the Bluetooth master control unit further comprises a magnetic induction switch unit (900), wherein the output end of the magnetic induction switch unit (900) is connected with the input end of the Bluetooth master control unit (100).
Tws bluetooth headset, characterized in that it comprises a bluetooth headset ANC noise reduction circuit according to any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320984574.1U CN219876024U (en) | 2023-04-23 | 2023-04-23 | Bluetooth headset ANC noise reduction circuit and TWS Bluetooth headset |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320984574.1U CN219876024U (en) | 2023-04-23 | 2023-04-23 | Bluetooth headset ANC noise reduction circuit and TWS Bluetooth headset |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219876024U true CN219876024U (en) | 2023-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320984574.1U Active CN219876024U (en) | 2023-04-23 | 2023-04-23 | Bluetooth headset ANC noise reduction circuit and TWS Bluetooth headset |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219876024U (en) |
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2023
- 2023-04-23 CN CN202320984574.1U patent/CN219876024U/en active Active
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