Active noise reduction Bluetooth headset and components thereof

Abstract

The present invention discloses an active noise reduction Bluetooth headset and its components, which relate to the field of headset technology, including an adjustment module, a noise reduction module, a power amplifier, and a Bluetooth module. The Bluetooth module is used to receive an audio signal and feed back the actual audio signal to the noise reduction module for noise reduction. The noise reduction module feeds back the signal to the power amplifier for output, and the adjustment module is used to adjust the noise reduction output of the noise reduction module and disable the function. After the Bluetooth module receives the audio signal, the external noise signal is collected by an electret for automatic elimination, so as to prevent the environmental noise from affecting the sound quality.

Description

Technical Field

[0001] The present invention relates to the technical field of earphones, and in particular to an active noise reduction Bluetooth earphone and a component thereof. Background Art

[0002] Publication No. CN112367580A discloses a noise reduction circuit and earphones, which reduce the current variation amplitude of the battery or the current obtained from the battery through a current transient control circuit, thereby reducing the noise generated by the battery current transient. However, in addition to the noise generated by the time gap during the earphone transmission process, the external environmental noise will also affect the sound quality of the earphone output. Summary of the invention

[0003] In view of the above technical problems, the purpose of the present invention is to provide an active noise reduction Bluetooth headset component, including an adjustment module, a noise reduction module, a power amplifier, and a Bluetooth module. The Bluetooth module is used to receive audio signals and feed back the actual audio signals to the noise reduction module for noise reduction. The noise reduction module feeds back the signals to the power amplifier for output. The adjustment module is used to adjust the noise reduction output of the noise reduction module and disable the function.

[0004] Furthermore, the noise reduction module includes a phase noise reduction unit, a balancing unit, an output unit, and a protection unit. The phase noise reduction unit is connected to the balancing unit, the output unit, and the protection unit. The phase noise reduction unit performs reverse noise reduction and calculation processing on the audio signal based on the balancing unit and feeds it back to the output unit. The protection unit is used for distortion detection.

[0005] Further, the phase noise reduction unit includes a first electret M, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a first operational amplifier U1, a second digital potentiometer U2, a first capacitor C1, a first transistor Q1, a second transistor Q2, a first connecting pin X1, and a second connecting pin X2, wherein the first electret M is connected to one end of the first capacitor C1 and the protection unit, the other end of the first capacitor C1 is connected to one end of the first resistor R1, one end of the fourth resistor R4, and the base of the first transistor Q1, the collector of the first transistor Q1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to one end of the third resistor R3 and the power supply, the emitter of the first transistor Q1 is connected to the emitter of the second transistor Q2, and one end of the fifth resistor R5 is connected, the collector of the second transistor Q2 is connected to one end of the third resistor R3, and the 3 pins of the first operational amplifier U1 are connected The base of the second transistor Q2 is connected to one end of the sixth resistor R6 and one end of the seventh resistor R7, and the other end of the seventh resistor R7 is connected to the power supply. The 2nd pin of the first operational amplifier U1 is connected to one end of the eighth resistor R8, the 1st pin of the first operational amplifier U1 is connected to the 12th pin and the 11th pin of the second digital potentiometer U2, the 10th pin of the second digital potentiometer U2 is connected to one end of the eighth resistor R8, the 4th pin of the second digital potentiometer U2 is connected to the power supply, the 3rd pin of the second digital potentiometer U2 is connected to one end of the ninth resistor R9 and the second connecting pin X2, the first connecting pin X1 and the second connecting pin X2 are connected to the adjustment module, the 5th pin of the second digital potentiometer U2 is connected to one end of the tenth resistor R10 and the first connecting pin X1, the 6th pin and the 14th pin of the second digital potentiometer U2, the other end of the ninth resistor R9, the other end of the tenth resistor R10, the other end of the sixth resistor R6, the other end of the eighth resistor R8, the other end of the fifth resistor R5, the other end of the fourth resistor R4 and the ground are connected.

[0006] Further, the phase noise reduction unit also includes an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, a third operational amplifier U3, a fourth operational amplifier U4, a first connecting pin X1, and a second connecting pin X2, one end of the eleventh resistor R11 is connected to pin 1 of the first operational amplifier U1, the other end of the eleventh resistor R11 is connected to one end of the twelfth resistor R12 and pin 3 of the third operational amplifier U3, and the third operational amplifier U4 is connected to pin X2. Pin 2 of the operational amplifier U3 is connected to the balancing unit, pin 1 of the third operational amplifier U3 is connected to one end of the thirteenth resistor R13 and one end of the fourteenth resistor R14, the other end of the thirteenth resistor R13 is connected to one end of the seventeenth resistor R17 and pin 2 of the fourth operational amplifier U4, pin 3 of the fourth operational amplifier U4 is connected to one end of the fifteenth resistor R15 and one end of the sixteenth resistor R16, the other end of the sixteenth resistor R16 is connected to one end of the eighth resistor R8, the other end of the seventeenth resistor R17 is connected to pin 1 of the fourth operational amplifier U4 and the output unit. The other end of the twelfth resistor R12, the other end of the fourteenth resistor R14, and the other end of the fifteenth resistor R15 are connected to the ground.

[0007] Further, the balancing unit includes an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a fifth digital potentiometer U5, and a third connecting pin X3, one end of the eighteenth resistor R18 is connected to pin 1 of the third operational amplifier U3, the other end of the eighteenth resistor R18 is connected to one end of the nineteenth resistor R19 and pin 2 of the third operational amplifier U3, the other end of the nineteenth resistor R19 is connected to the third connecting pin X3, pin 11 of the fifth digital potentiometer U5, and one end of the twentieth resistor R20, the third connecting pin X3 is connected to the adjustment module, pins 12 and 4 of the fifth digital potentiometer U5 are connected to the power supply, pins 10, 14, and 6 of the fifth digital potentiometer U5, and the other end of the twentieth resistor R20 are connected to the ground, pin 5 of the fifth digital potentiometer U5 is connected to one end of the tenth resistor R10, and pin 3 of the fifth digital potentiometer U5 is connected to one end of the ninth resistor R9.

[0008] Further, the output unit includes a twenty-first resistor R21, a twenty-second resistor R22, a second capacitor C2, a third connecting pin X3, and a fourth connecting pin X4, one end of the second capacitor C2 is connected to pin 1 of the fourth operational amplifier U4 and the protection unit, the other end of the second capacitor C2 is connected to the fourth connecting pin X4, one end of the twenty-first resistor R21, and one end of the twenty-second resistor R22, the other end of the twenty-first resistor R21 is connected to the power supply, and the other end of the twenty-second resistor R22 is connected to the ground.

[0009] Furthermore, the protection unit includes a third capacitor C3, one end of the third capacitor C3 is connected to one end of the first resistor R1, and the other end of the third capacitor C3 is connected to the ground.

[0010] Furthermore, the protection unit also includes a sixth operational amplifier U6, a twenty-third resistor R23, and a twenty-fourth resistor R24, wherein the 3-pin of the sixth operational amplifier U6 is connected to one end of the second capacitor C2, the 2-pin of the sixth operational amplifier U6 is connected to one end of the twenty-third resistor R23 and one end of the twenty-fourth resistor R24, the 1-pin of the sixth operational amplifier U6 is connected to the first connecting pin X1, the other end of the twenty-third resistor R23 is connected to the power supply, and the other end of the twenty-fourth resistor R24 ​​is connected to the ground.

[0011] Furthermore, a Bluetooth headset comprises the active noise reduction Bluetooth headset component described in any one of claims 1-9.

[0012] The beneficial effects of the present invention compared with the prior art are:

[0013] After the Bluetooth module receives the audio signal, the present invention can collect the external noise signal through the electret to automatically eliminate it, so as to prevent the environmental noise from affecting the sound quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the prior art and the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 The present invention provides an overall structural diagram.

[0016] Figure 2 This is a schematic diagram of the noise reduction module structure provided by the present invention.

[0017] Figure 3 This is a schematic diagram of the internal circuit connection structure of the noise reduction module provided by the present invention. DETAILED DESCRIPTION

[0018] In order to make the objects and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0019] See attached Figure 1-3The present invention is an active noise reduction Bluetooth headset component, including an adjustment module, a noise reduction module, a power amplifier, and a Bluetooth module. The Bluetooth module is used to receive an audio signal and feed back the actual audio signal to the noise reduction module for noise reduction. The noise reduction module feeds back the signal to the power amplifier for output. The adjustment module is used to adjust the noise reduction output of the noise reduction module and disable the function.

[0020] Specifically, the noise reduction module includes a phase noise reduction unit, a balancing unit, an output unit, and a protection unit. The phase noise reduction unit is connected to the balancing unit, the output unit, and the protection unit. The phase noise reduction unit performs reverse noise reduction and calculation processing on the audio signal based on the balancing unit and feeds it back to the output unit. The protection unit is used for distortion detection.

[0021] Specifically, the phase noise reduction unit includes a first electret M, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a first operational amplifier U1, a second digital potentiometer U2, a first capacitor C1, a first transistor Q1, a second transistor Q2, a first connecting pin X1, and a second connecting pin X2. The first electret M is connected to one end of the first capacitor C1 and the protection unit, the other end of the first capacitor C1 is connected to one end of the first resistor R1, one end of the fourth resistor R4, and the base of the first transistor Q1, the collector of the first transistor Q1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to one end of the third resistor R3 and the power supply, the emitter of the first transistor Q1 is connected to the emitter of the second transistor Q2, and one end of the fifth resistor R5 is connected, and the collector of the second transistor Q2 is connected to one end of the third resistor R3 and the 3 pin of the first operational amplifier U1. , the base of the second transistor Q2 is connected to one end of the sixth resistor R6 and one end of the seventh resistor R7, and the other end of the seventh resistor R7 is connected to the power supply, the 2nd pin of the first operational amplifier U1 is connected to one end of the eighth resistor R8, the 1st pin of the first operational amplifier U1 is connected to the 12th pin and the 11th pin of the second digital potentiometer U2, the 10th pin of the second digital potentiometer U2 is connected to one end of the eighth resistor R8, the 4th pin of the second digital potentiometer U2 is connected to the power supply, the 3rd pin of the second digital potentiometer U2 is connected to one end of the ninth resistor R9 and the second connecting pin X2, the first connecting pin X1 and the second connecting pin X2 are connected to the adjustment module, the 5th pin of the second digital potentiometer U2 is connected to one end of the tenth resistor R10 and the first connecting pin X1, the 6th pin and the 14th pin of the second digital potentiometer U2, the other end of the ninth resistor R9, the other end of the tenth resistor R10, the other end of the sixth resistor R6, the other end of the eighth resistor R8, the other end of the fifth resistor R5, the other end of the fourth resistor R4 and the ground are connected.

[0022] Specifically, the phase noise reduction unit also includes an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, a third operational amplifier U3, a fourth operational amplifier U4, a first connecting pin X1, and a second connecting pin X2, one end of the eleventh resistor R11 is connected to pin 1 of the first operational amplifier U1, the other end of the eleventh resistor R11 is connected to one end of the twelfth resistor R12 and pin 3 of the third operational amplifier U3, and the third operational amplifier U4 is connected to the first operational amplifier U4. Pin 2 of the amplifier U3 is connected to the balancing unit, pin 1 of the third operational amplifier U3 is connected to one end of the thirteenth resistor R13 and one end of the fourteenth resistor R14, the other end of the thirteenth resistor R13 is connected to one end of the seventeenth resistor R17 and pin 2 of the fourth operational amplifier U4, pin 3 of the fourth operational amplifier U4 is connected to one end of the fifteenth resistor R15 and one end of the sixteenth resistor R16, the other end of the sixteenth resistor R16 is connected to one end of the eighth resistor R8, the other end of the seventeenth resistor R17 is connected to pin 1 of the fourth operational amplifier U4 and the output unit. The other end of the twelfth resistor R12, the other end of the fourteenth resistor R14, and the other end of the fifteenth resistor R15 are connected to the ground.

[0023] Specifically, the balancing unit includes an eighteenth resistor R18, a nineteenth resistor R19, a twentieth resistor R20, a fifth digital potentiometer U5, and a third connecting pin X3, one end of the eighteenth resistor R18 is connected to pin 1 of the third operational amplifier U3, the other end of the eighteenth resistor R18 is connected to one end of the nineteenth resistor R19 and pin 2 of the third operational amplifier U3, the other end of the nineteenth resistor R19 is connected to the third connecting pin X3, pin 11 of the fifth digital potentiometer U5, and one end of the twentieth resistor R20, the third connecting pin X3 is connected to the adjustment module, pins 12 and 4 of the fifth digital potentiometer U5 are connected to the power supply, pins 10, 14, and 6 of the fifth digital potentiometer U5, and the other end of the twentieth resistor R20 are connected to the ground, pin 5 of the fifth digital potentiometer U5 is connected to one end of the tenth resistor R10, and pin 3 of the fifth digital potentiometer U5 is connected to one end of the ninth resistor R9.

[0024] Specifically, the output unit includes a twenty-first resistor R21, a twenty-second resistor R22, a second capacitor C2, a third connecting pin X3, and a fourth connecting pin X4, one end of the second capacitor C2 is connected to pin 1 of the fourth operational amplifier U4 and the protection unit, the other end of the second capacitor C2 is connected to the fourth connecting pin X4, one end of the twenty-first resistor R21, and one end of the twenty-second resistor R22, the other end of the twenty-first resistor R21 is connected to the power supply, and the other end of the twenty-second resistor R22 is connected to the ground.

[0025] Specifically, the protection unit includes a third capacitor C3, one end of the third capacitor C3 is connected to one end of the first resistor R1, and the other end of the third capacitor C3 is connected to the ground.

[0026] Specifically, the protection unit also includes a sixth operational amplifier U6, a twenty-third resistor R23, and a twenty-fourth resistor R24. Pin 3 of the sixth operational amplifier U6 is connected to one end of the second capacitor C2, pin 2 of the sixth operational amplifier U6 is connected to one end of the twenty-third resistor R23 and one end of the twenty-fourth resistor R24, pin 1 of the sixth operational amplifier U6 is connected to the first connection pin X1, the other end of the twenty-third resistor R23 is connected to the power supply, and the other end of the twenty-fourth resistor R24 ​​is connected to the ground.

[0027] Specifically, a Bluetooth headset comprises the active noise reduction Bluetooth headset component according to any one of claims 1 to 9. The component of the present invention can also be understood as a system.

[0028] Specifically, after receiving the audio signal, the Bluetooth module feeds back the signal to the third pin X3 or to the adjustment module, performs AD conversion, and then feeds back the signal to the fifth digital potentiometer U5 for adjustment to generate the actual audio signal. The first electret M is used to detect environmental noise and input the signal to the phase noise reduction unit for processing, wherein the first resistor R1 and the fourth resistor R4 are used to configure the DC static point of the base of the first transistor Q1, and the seventh resistor R7 and the sixth resistor R6 configure the second transistor Q2. When there is noise in the first electret M, the signal is coupled to the first capacitor C1 and fed back to the first transistor Q1 for amplification. The second transistor Q2 is reverse biased based on the coupling of the first capacitor C1, and the power supply signal is fed back to the first operational amplifier U1 for amplification and acquisition through the third resistor R3. The noise superposition signal, the eighth resistor R8 and the second digital potentiometer U2 are used for amplification and adjustment of the first operational amplifier U1, and are also used for input matching of the subsequent circuit. The ninth resistor R9 and the tenth resistor R10 are used for the second digital potentiometer U2 signal loop. The first connecting pin X1 and the second connecting pin X2 are connected to the adjustment module. The adjustment module is adjusted before initial power-on or during use. When the time slot interference is low, no adjustment is performed. When no adjustment is performed, the second digital potentiometer U2 is set. The ninth resistor R9 is connected to the power supply through a jumper pin. The signal will be fed back to the third operational amplifier U3 through the eleventh resistor R11 and the twelfth resistor R12. In this embodiment, the actual noise reduction-free signal is input through the third connecting pin X3. The third operational amplifier U3 is differentiated and then output to the fourth operational amplifier U4 for noise reduction. When the noise is high, the amplification of the first electret M signal of the opposite phase is increased or decreased through the first connecting pin X1 and the second connecting pin X2 to reduce the noise. In another embodiment, the third connecting pin X3 is not used as a signal input. The first connecting pin X1 and the second connecting pin X2 adjust the fifth digital potentiometer U5 to feed back the audio signal without noise reduction to the third operational amplifier U3 instead of the third connecting pin X3 input. In this embodiment, the adjustment condition for the first connecting pin X1 and the second connecting pin X2 is to reduce the 11-pin output of the fifth digital potentiometer U5 when it is higher than a certain signal-to-noise ratio, and vice versa. Correspondingly, the fifth digital potentiometer U5 and the second digital potentiometer U2 are adjusted at this time. The 3rd and 5th pins are connected in parallel, and the fifth digital potentiometer U5 is adjusted through the first connection pin X1 and the second connection pin X2 to complete the signal input of the third connection pin X3. The amplification factor of the first operational amplifier U1 is also adjusted following the fifth digital potentiometer U5, so that it can attenuate and reduce noise when there is high noise. The process is that when the signal output by the fifth digital potentiometer U5 is fed back to the third operational amplifier U3 through the nineteenth resistor R19, the third operational amplifier U3 differentially outputs to the fourth operational amplifier U4, the 3rd pin of the fourth operational amplifier U4 inputs the unprocessed actual signal through the sixteenth resistor R16, the 2nd pin of the fourth operational amplifier U4 inputs the required inverted noise reduction signal, and the fourth operational amplifier U4 completes the noise reduction after performing the addition operation.Both noise reduction methods can be connected in series by the third pin X3 and the 1 pin of the first operational amplifier U1 in the previous noise reduction module. The first pin X1 and the second pin X2 are connected in parallel at multiple levels and then connected to the adjustment module. When high precision is used, X3 is suspended for multi-level noise reduction. In the output unit, the second capacitor C2 is used to couple the signal output by the fourth operational amplifier U4 and feedback it to the fourth connection pin X4. The twenty-first resistor R21 and the twenty-second resistor R22 are used for the fourth operational amplifier U4 to open the circuit and isolate the second capacitor C2 when there is no signal output. The protection unit is used. The 3 pin of the sixth operational amplifier U6 collects the output range of the fourth operational amplifier U4. The twenty-third resistor R23 and the twenty-fourth resistor R24 ​​are used for voltage division to set the distortion threshold of the sixth operational amplifier U6. When the third connection pin X3 is used for signal input, the sixth operational amplifier U6 is connected to the 5 pin of the second digital potentiometer U2 as a sleep signal. Otherwise, it is connected to the 5 pin of the fifth digital potentiometer U5 as a sleep signal (the attached figure shows the connection of the second digital potentiometer U2). ,

[0029] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the equivalent elements of the claims be included in the invention. Any marking in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An active noise reduction Bluetooth headset assembly, characterized in that: It includes an adjustment module, a noise reduction module, a power amplifier, and a Bluetooth module. The Bluetooth module is used to receive an audio signal and feed back the actual audio signal to the noise reduction module for noise reduction. The noise reduction module transmits the feedback signal to the power amplifier for output. The adjustment module is used to adjust the noise reduction output of the noise reduction module and disable the function. The noise reduction module includes a phase noise reduction unit, a balancing unit, an output unit, and a protection unit. The phase noise reduction unit is connected to the balancing unit, the output unit, and the protection unit. The phase noise reduction unit performs reverse noise reduction and operation processing on the audio signal based on the balancing unit and feeds back to the output unit. The protection unit is used for distortion detection; The phase noise reduction unit includes a first electret, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first operational amplifier, a second digital potentiometer, a first capacitor, a first transistor, a second transistor, a first connecting pin, a second connecting pin, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, a third operational amplifier, a fourth operational amplifier, a first connecting pin, and a second connecting pin. The first electret is connected to one end of the first capacitor and the protection unit, and the other end of the first capacitor is connected to one end of the first resistor, one end of the fourth resistor, and the base of the first transistor; Among them, after receiving the audio signal, the Bluetooth module feeds it back to the third pin or feeds it back to the adjustment module, performs AD conversion and then feeds it back to the fifth digital potentiometer for adjustment to generate the actual audio signal, and the first electret is used to detect the environmental noise and input the signal to the phase noise reduction unit for processing; The adjustment module is adjusted before initial power-on or during use, and no adjustment is performed when the time slot interference is low. When no adjustment is performed, the second digital potentiometer is set, and the ninth resistor is connected to the power supply through a jumper pin, and the signal is fed back to the third operational amplifier through the voltage division of the eleventh resistor and the twelfth resistor; the third operational amplifier performs differential and then outputs to the fourth operational amplifier for noise reduction, and when the noise is high, the amplification of the first electret signal of the opposite phase is increased or reduced through the first connecting pin and the second connecting pin for noise reduction; the amplification factor of the first operational amplifier follows the adjustment of the fifth digital potentiometer, so that it performs attenuation and noise reduction when the noise is high; The protection unit further includes a sixth operational amplifier, a twenty-third resistor, and a twenty-fourth resistor, wherein the 3rd pin of the sixth operational amplifier is connected to one end of the second capacitor, the 2nd pin of the sixth operational amplifier is connected to one end of the twenty-third resistor and one end of the twenty-fourth resistor, the 1st pin of the sixth operational amplifier is connected to the first connecting pin, the other end of the twenty-third resistor is connected to the power supply, and the other end of the twenty-fourth resistor is connected to the ground; Pin 3 of the sixth operational amplifier of the protection unit collects the output range of the fourth operational amplifier, and the twenty-third resistor and the twenty-fourth resistor are used for voltage division to set the distortion threshold of the sixth operational amplifier; The balancing unit includes an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a fifth digital potentiometer, and a third connecting pin. One end of the eighteenth resistor is connected to pin 1 of the third operational amplifier, the other end of the eighteenth resistor is connected to one end of the nineteenth resistor and pin 2 of the third operational amplifier, the other end of the nineteenth resistor is connected to the third connecting pin, pin 11 of the fifth digital potentiometer, and one end of the twentieth resistor, the third connecting pin is connected to the adjustment module, pin 12 and pin 4 of the fifth digital potentiometer are connected to the power supply, pin 10, pin 14, pin 6 of the fifth digital potentiometer, and the other end of the twentieth resistor are connected to the ground, pin 5 of the fifth digital potentiometer is connected to one end of the tenth resistor, and pin 3 of the fifth digital potentiometer is connected to one end of the ninth resistor.

2. The active noise reduction Bluetooth headset assembly according to claim 1, characterized in that: The collector of the first transistor is connected to one end of the second resistor, the other end of the second resistor is connected to one end of the third resistor and a power supply, the emitter of the first transistor and the emitter of the second transistor are connected to one end of the fifth resistor, the collector of the second transistor is connected to one end of the third resistor and pin 3 of the first operational amplifier, the base of the second transistor is connected to one end of the sixth resistor and one end of the seventh resistor, the other end of the seventh resistor is connected to the power supply, pin 2 of the first operational amplifier is connected to one end of the eighth resistor, pin 1 of the first operational amplifier is connected to pins 12 and 11 of the second digital potentiometer, pin 10 of the second digital potentiometer is connected to one end of the eighth resistor, pin 4 of the second digital potentiometer is connected to the power supply, pin 3 of the second digital potentiometer is connected to one end of the ninth resistor and a second connecting pin, the first connecting pin and the second connecting pin are connected to the adjustment module, pin 5 of the second digital potentiometer is connected to one end of the tenth resistor and the first connecting pin, pin 6 of the second digital potentiometer, pin 14, the other end of the ninth resistor, the other end of the tenth resistor, the other end of the sixth resistor, the other end of the eighth resistor, the other end of the fifth resistor, the other end of the fourth resistor and the ground are connected.

3. The active noise reduction Bluetooth headset assembly according to claim 1, characterized in that: One end of the eleventh resistor is connected to pin 1 of the first operational amplifier, the other end of the eleventh resistor is connected to one end of the twelfth resistor and pin 3 of the third operational amplifier, pin 2 of the third operational amplifier is connected to the balancing unit, pin 1 of the third operational amplifier is connected to one end of the thirteenth resistor and one end of the fourteenth resistor, the other end of the thirteenth resistor is connected to one end of the seventeenth resistor and pin 2 of the fourth operational amplifier, pin 3 of the fourth operational amplifier is connected to one end of the fifteenth resistor and one end of the sixteenth resistor, the other end of the sixteenth resistor is connected to one end of the eighth resistor, the other end of the seventeenth resistor is connected to pin 1 of the fourth operational amplifier and the output unit, and the other ends of the twelfth resistor, the other ends of the fourteenth resistor, and the other ends of the fifteenth resistor are connected to the ground.

4. The active noise reduction Bluetooth headset assembly according to claim 1 or 2, characterized in that: The output unit includes a twenty-first resistor, a twenty-second resistor, a second capacitor, a third connecting pin, and a fourth connecting pin. One end of the second capacitor is connected to pin 1 of the fourth operational amplifier and the protection unit. The other end of the second capacitor is connected to the fourth connecting pin, one end of the twenty-first resistor, and one end of the twenty-second resistor. The other end of the twenty-first resistor is connected to the power supply, and the other end of the twenty-second resistor is connected to the ground.

5. The active noise reduction Bluetooth headset assembly according to claim 1 or 2, characterized in that: The protection unit includes a third capacitor, one end of the third capacitor is connected to one end of the first resistor, and the other end of the third capacitor is connected to the ground.

6. A Bluetooth headset, characterized in that: The invention comprises the active noise reduction Bluetooth headset component as described in any one of claims 1 to 5.

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