Noise reduction device in cabin and vehicle

Abstract

The utility model discloses a noise reduction device in a cabin and a vehicle, at least one target position sensor is arranged in the cabin, and the device comprises a microphone assembly arranged on the cabin and used for collecting original noise signals; the sensor assemblies are arranged at the positions of at least one target seat and used for collecting residual noise signals at the corresponding target positions, and the sensor assemblies correspond to the target seats one to one; the controller is connected with the microphone assembly and each sensor assembly, and is used for outputting an electric signal based on the original noise signal and the residual noise signal acquired by the sensor assembly; the loudspeaker assemblies are arranged at the positions of at least one target seat, the loudspeaker assemblies are connected with the controller and used for outputting anti-phase sound waves based on the electric signals, and the loudspeaker assemblies correspond to the target seats in a one-to-one mode. Therefore, the device realizes active noise reduction in the cabin based on the original noise signal and the residual noise signal obtained at the target position, and the riding comfort of passengers in the cabin is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cockpit noise reduction, and particularly relates to a cockpit noise reduction device and a vehicle. BACKGROUND

[0002] With the improvement of vehicle intelligence, the requirements of the driver and the passenger for the acoustic environment in the vehicle are increasingly strict. The noise in the vehicle can reduce the comfort of the driver and the passenger, cause the driver and the passenger to be annoyed and tired, and also affect the clarity of the communication between the members in the vehicle, and even affect the perception of the driver to the signal sound outside the vehicle, and increase the traffic hazards.

[0003] In the related art, the engine active noise reduction (ENC) technology and the road noise active noise reduction (RNC) technology are used to complete the active noise reduction of the automobile. However, the two technical solutions are only used to reduce the low-frequency component noise transmitted to the vehicle interior through the vehicle structure path, and the noise reduction effect is poor. UTILITY MODEL CONTENT

[0004] The present application aims to at least solve one of the technical problems in the related art. To this end, the first object of the present application is to provide a cockpit noise reduction device, which realizes active noise reduction for a target position in the cockpit based on an original noise signal and a residual noise signal, and improves the riding comfort of the passengers in the cockpit.

[0005] The second object of the present application is to provide a vehicle.

[0006] To achieve the above object, the first aspect of the present application provides a cockpit noise reduction device, the cockpit comprising at least one target position sensor, the cockpit noise reduction device comprising: a microphone assembly arranged on the cockpit, configured to collect an original noise signal; a sensor assembly arranged at at least one target seat, configured to collect a residual noise signal at the corresponding target position, the sensor assembly corresponding to the target seat in a one-to-one manner; a controller, the controller being connected to the microphone assembly and each sensor assembly respectively, configured to output an electric signal based on the original noise signal and the residual noise signal collected by the sensor assembly; a loudspeaker assembly arranged at the at least one target seat, the loudspeaker assembly being connected to the controller, configured to output an inverted sound wave based on the electric signal, the loudspeaker assembly corresponding to the target seat in a one-to-one manner.

[0007] According to the cockpit noise reduction device provided in the embodiment of the present application, the microphone assembly arranged on the cockpit is used to collect original noise signals, the sensor assembly arranged at the at least one target seat is used to collect residual noise signals at the corresponding target position, the sensor assembly corresponds to the target seat in one-to-one manner, and the controller outputs an electric signal based on the original noise signals and the residual noise signals collected by the sensor assembly; the loudspeaker assembly arranged at the at least one target seat is connected to the controller and is used to output reverse-phase sound waves based on the electric signal, and the loudspeaker assembly corresponds to the target seat in one-to-one manner. Thus, the device can achieve noise reduction processing of the target position based on the original noise signals and the residual noise signals at the target position, and improve the riding comfort of the passengers in the cockpit.

[0008] In addition, the cockpit noise reduction device provided in the above-mentioned embodiment of the present application can have the following additional technical features:

[0009] According to one embodiment of the present application, the sensor assembly and the loudspeaker assembly are integrally arranged in the headrest of the target seat. The precise noise reduction control can be achieved, and the noise reduction effect of the head area is improved. In addition, the device can be directly applied to the existing seat by replacing the headrest component, thereby reducing the hardware cost.

[0010] According to one embodiment of the present application, the loudspeaker in the cockpit reuses the loudspeaker assembly. The reuse of the loudspeaker assembly can reduce the hardware cost.

[0011] According to one embodiment of the present application, the sensor assembly is arranged at the ceiling position of the cockpit and corresponds to the upper side of the target seat. Thus, the hardware cost is reduced.

[0012] According to one embodiment of the present application, the microphone assembly includes at least one microphone, and the microphone is arranged inside or outside the cockpit. The different application scenarios can be met.

[0013] According to one embodiment of the present application, the sensor assembly includes at least one microphone sensor, and the microphone sensor is arranged inside the headrest of the target seat. The microphone sensor is integrated inside the headrest of the target seat, which can improve the noise reduction precision. In addition, the device can be directly applied to the original seat by replacing the headrest, and the application of the noise reduction device is realized without damaging the original seat, thereby reducing the application cost and improving the application range.

[0014] According to one embodiment of the present application, the noise reduction device further includes a switch assembly arranged at the target seat, the switch assembly is connected to the controller, and the switch assembly is used to open or close the noise reduction function in response to an opening instruction or a closing instruction. Thus, the user can open or close the noise reduction device according to the demand, and the use flexibility is improved.

[0015] According to one embodiment of the present application, the noise reduction device further comprises: a power amplifier, one end of the power amplifier being connected with the controller, and the other end of the power amplifier being connected with the speaker assembly, for amplifying the electric signal, so as to improve the sound quality and volume, and ensure that the electric signal can be output with high quality and large enough sound.

[0016] According to one embodiment of the present application, the controller is further configured to update filter coefficients of the noise reduction algorithm according to the original noise signal and the residual noise signal, and output the electric signal when the residual noise signal meets the preset requirement, so as to meet different application scenarios and ensure the noise reduction effect.

[0017] To achieve the above object, a second aspect of the present application provides a vehicle comprising the in-cabin noise reduction device.

[0018] According to the vehicle of the present application, the in-cabin noise reduction device is used to reduce noise at the target position in the vehicle, so as to improve the comfort of the passengers in the vehicle.

[0019] Additional aspects and advantages of the present application will be made apparent by the following description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Fig. 1 is a connection diagram of the in-cabin noise reduction device according to one embodiment of the present application;

[0021] Figure 2 Fig. 2 is a whole vehicle arrangement diagram of the in-cabin noise reduction device according to one embodiment of the present application;

[0022] Figure 3 Fig. 3 is an arrangement diagram of the target seat according to one embodiment of the present application;

[0023] Figure 4 Fig. 4 is a schematic diagram of the active noise reduction algorithm according to one embodiment of the present application;

[0024] Figure 5 Fig. 5 is a schematic diagram of the environmental noise reduction effect according to one embodiment of the present application;

[0025] Figure 6 Fig. 6 is a block diagram of the vehicle according to one embodiment of the present application. DETAILED DESCRIPTION

[0026] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0027] The cabin noise reduction device and the vehicle according to the embodiments of the present application are described below with reference to the drawings.

[0028] Figure 1 The connection diagram of the cabin noise reduction device according to the embodiments of the present application.

[0029] In some embodiments of the present application, the cabin includes at least one target position sensor.

[0030] The cabin noise reduction device can be applied to a vehicle, a business first-class cabin on a high-speed train, a flying car, and other enclosed spaces, to actively reduce the ambient noise transmitted into the space based on the cabin noise reduction device of the present application. The installation position of the target position sensor can be flexibly set according to the noise reduction requirements of the application scenario, and the specific implementation is not limited.

[0031] The cabin noise reduction device is described in detail below by taking a vehicle as an example.

[0032] As shown in Figure 1 The cabin noise reduction device according to the embodiments of the present application includes a microphone assembly 10 arranged on the cabin, a sensor assembly 20 arranged at at least one target seat, a controller 30, and a speaker assembly 40 arranged at at least one target seat.

[0033] The microphone assembly 10 is used to collect original noise signals; the sensor assembly 20 is used to collect residual noise signals at the corresponding target position, and the sensor assembly 20 corresponds to the target seat one-to-one; the controller 30 is connected to the microphone assembly 10 and each sensor assembly 20 respectively, and is used to output an electric signal based on the original noise signal and the residual noise signal collected by the sensor assembly 20; the speaker assembly 40 is connected to the controller 30, and is used to output an inverted sound wave based on the electric signal, and the speaker assembly 40 corresponds to the target seat one-to-one.

[0034] Specifically, a plurality of microphone assemblies 10 arranged outside or inside the vehicle pick up the environmental sound signals outside the vehicle as original noise signals. The number and arrangement position of the microphone assemblies 10 are determined according to actual requirements, which can be 2, 4, 6, 10, etc., to ensure that the noise propagating from all directions to the vehicle can be effectively picked up. The microphone assembly 10 can be a plurality of microphone sensors, which convert the sound signal into an electric signal and send it to the controller 30 for noise reduction processing.

[0035] The sensor assembly 20 is arranged at a target position in the cabin to collect environmental noise transmitted to the target position to convert into a residual noise signal output as a feedback parameter for noise reduction operation. The target position corresponds to a target seat installed at a target noise reduction position in the vehicle. The target seat can be the front driver seat or the front passenger seat, or the middle seat in a three-row seat vehicle or the rear seat in a five-seat vehicle, and the target position corresponds to the position of the target seat.

[0036] The controller 30 is connected to the microphone assembly 10, the sensor assembly 20, and the speaker assembly 40 by a line. The controller 30 outputs an electrical signal based on the original noise signal and the residual noise signal, and uses the principle of sound wave superposition and cancellation to drive the speaker assembly 40 to emit a real-time and anti-phase sound wave with the noise at the target position, so as to achieve the purpose of actively reducing noise. The speaker assembly 40 can be arranged at the headrest of the target seat to reduce noise in the head area of the target seat. At the same time, the microphone assembly 10, the sensor assembly 20, and the speaker assembly 40 are connected to the controller 30 by a line, which can reduce the delay and meet the real-time requirement. The whole vehicle arrangement is shown in Figure 2 The reference sensor is the microphone assembly 10, the error sensor is the sensor assembly 20, and the noise reduction headrest is the headrest of the target seat integrated with the speaker assembly 40.

[0037] In this embodiment, the microphone assembly 10 and the sensor assembly 20 collect the original noise signal and the residual noise signal respectively, and the controller 30 drives the speaker assembly 40 to generate an anti-phase cancellation sound wave based on the original noise signal and the residual noise signal, so as to realize the superposition and cancellation of the noise sound wave at the target seat and the target area, and achieve active noise reduction. Therefore, this embodiment can realize active noise reduction for road noise with wide frequency, randomness, and noise. Compared with the structural sound active noise reduction (ENC, RNC) technical solution in the related art, the noise reduction frequency range of this embodiment can be complementary to that of the related art, thereby improving the noise reduction effect of the vehicle.

[0038] In some embodiments of the present application, the sensor assembly 20 and the speaker assembly 40 are integrated in the headrest of the target seat.

[0039] For example, two sensor assemblies 20 and two speaker assemblies 40 are arranged in the headrest of each target seat, and the specific number is not limited. Integrating the sensor assembly 20 and the speaker assembly 40 in the headrest can actively reduce noise by collecting noise in the head area, achieve precise control of noise reduction, and improve the noise reduction effect in the head area. In addition, the headrest component can be replaced to be directly applied to an existing seat, thereby reducing hardware costs.

[0040] In some embodiments of the present application, the speaker in the cabin is multiplexed with the speaker assembly 40.

[0041] That is to say, when the noise reduction device in the cabin is applied to a vehicle, the loudspeaker assembly 40 can be shared with a door woofer, for example, the loudspeaker assembly 40 is arranged in the headrest of each seat of the vehicle, when there is a noise reduction demand, the loudspeaker assembly 40 can be controlled to emit anti-phase sound waves, and active noise reduction is completed based on the principle of sound wave superposition; when there is an entertainment, call or other demand, music or the like is played through the loudspeaker assembly 40, so that the loudspeaker assembly 40 is multiplexed, and the hardware cost is reduced.

[0042] In some embodiments of the present application, the sensor assembly 20 is arranged at a ceiling position of the cabin and above the target seat.

[0043] That is to say, when applied to in-vehicle noise reduction, for the purpose of reducing hardware cost, the sensor assembly 20 can be arranged at a ceiling position corresponding to the target seat in the vehicle to acquire noise at a position corresponding to the target seat, and output a corresponding residual noise signal for noise reduction control.

[0044] In some embodiments of the present application, the microphone assembly 10 includes at least one microphone, and the microphone is arranged inside or outside the cabin.

[0045] Specifically, the microphone is used to collect original environmental noise signals, i.e., original noise signals, and can be arranged inside or outside the vehicle. For example, when the microphone is arranged inside the cabin, the environmental noise transmitted into the vehicle is collected to generate the original noise signal, and the noise at the target seat acquired by the sensor assembly 20 generates the residual noise signal, i.e., active noise reduction is performed according to the environmental noise transmitted into the vehicle and the noise at the target seat; when the microphone is arranged outside the cabin, the noise outside the vehicle is directly collected to output the original noise signal, i.e., active noise reduction is performed according to the noise outside the vehicle and the noise at the target seat, and a better noise reduction effect can be achieved.

[0046] In some embodiments of the present application, the sensor assembly 20 includes at least one microphone sensor, and the microphone sensor is arranged inside the headrest of the target seat.

[0047] Specifically, the microphone sensor converts a sound signal into an electrical signal for output, and the sensor assembly 20 acquires the sound at the target seat through the at least one microphone sensor and converts it into an electrical signal to obtain a residual noise signal for noise reduction.

[0048] The microphone sensor is integrated inside the headrest of the target seat, which can improve the noise reduction accuracy, and can be directly replaced in the original seat through the headrest, so that the noise reduction device is applied without damaging the original seat, the application cost is reduced, and the application range is improved.

[0049] In combination Figure 3As shown, in some embodiments of the present application, the in-cabin noise reduction device further comprises a switch assembly 50 arranged at the target seat, the switch assembly 50 is connected with the controller 30, and the switch assembly 50 is responsive to the opening instruction or the closing instruction to open or close the noise reduction function.

[0050] Specifically, the switch assembly 50 can be a mechanical switch or an electronic switch, such as Figure 2 a control switch, without limitation. For example, the switch assembly 50 is arranged at the armrest of the target seat, and is connected with the controller 30 through the wire harness 70, so as to facilitate the user to open or close the noise reduction device according to the demand, and improve the use flexibility. Figure 3

[0051] In some embodiments of the present application, the in-cabin noise reduction device further comprises a power amplifier 60, one end of the power amplifier 60 is connected with the controller 30, and the other end of the power amplifier 60 is connected with the loudspeaker assembly 40, for amplifying the electrical signal.

[0052] Specifically, for example, the controller 30 and the power amplifier 60 are arranged at the bottom of the target seat, and are connected with the loudspeaker assembly 40 through the wire harness 70, and the power amplifier 60 amplifies the electrical signal output by the controller 30, so as to drive the loudspeaker assembly 40 through the amplified electrical signal, thereby improving the sound quality and volume, and ensuring that the electrical signal can be output with high quality and sufficient sound. Figure 3

[0053] In some embodiments of the present application, the controller 30 is further configured to update the filter coefficients of the noise reduction algorithm according to the original noise signal and the residual noise signal, and output the electrical signal when the residual noise signal meets the preset requirement.

[0054] Specifically, the noise reduction algorithm takes the original noise signal picked up by the microphone assembly 10 as the feedforward signal, adopts a multi-channel normalized filtered-x least mean square (FxLMS) algorithm for noise reduction operation, and adjusts the key parameters such as the leakage factor and the step size of the noise reduction algorithm according to the noise reduction scene.

[0055] For example, it is assumed that the microphone assembly 10 has N reference sensors, the sensor assembly 20 has Q error sensors, and the loudspeaker assembly 40 includes G secondary sound sources, i.e. loudspeakers, in combination Figure 4 As shown, in the discrete time domain, at time n, x I (n) is the environmental noise signal, i.e. the original noise signal, collected by the Ith reference sensor, the reference sensor can be arranged in the vehicle or outside the vehicle, and the reference sensor collects the environmental noise signal at the arrangement position and transmits it to the controller 30; d​​M (n) is the desired signal at the Mth error sensor, i.e. the primary signal at the target noise reduction location; P I*M is the primary path from the Ith reference sensor to the Mth error sensor, i.e. the reference noise x I (n) is the noise formed at the Mth target noise reduction location in the vehicle after actually passing through the acoustic transmission of the vehicle body structure d M (n) is the entire acoustic propagation process from x I (n) to d M (n); in practice, P I*M is unknown; W I*J (n) is the transfer function of the adaptive filter between the Ith reference sensor and the Jth loudspeaker, the impulse response coefficients of which are updated in real time by the adaptive algorithm used, so as to achieve active control of the noise; y J (n) is the output signal, which is the secondary acoustic wave signal emitted by the Jth loudspeaker in the headrest driven by the power amplifier of the controller 30; S J*M is the secondary path, which is the transfer function from the Jth loudspeaker in the headrest to the Mth error sensor, and actually includes the time delay and frequency response caused by the electro-acoustic conversion of the loudspeaker and the acoustic transfer function of the sound propagating from the loudspeaker to the error sensor; Y M (n) is the output signal y J (n) after passing through the secondary path S J*M and reaching the Mth error sensor, which is also the secondary signal; e M (n) is the error signal, which is the residual error after the secondary signal Y M (n) and the primary signal d M (n) are subtracted, and this signal is actually collected by the Mth error sensor, i.e. the residual noise signal; is the estimated secondary path of the physical secondary path S J*M , because the time delay and transfer function error of the physical secondary path S J*M cannot be ignored, the impact needs to be compensated in the system, which is obtained by system identification method; r I*J*M (n) is the reference signal x I (n) filtered by the estimated secondary path , i.e. the signal used for operation after convolution calculation.

[0056] The error signal of the in-seat noise reduction device is represented by the following formula:

[0057] e(n) = d(n) - Y(n) = d(n) - s(n) * y(n)

[0058] where s(n) is the impulse response of the secondary path S, and * represents convolution operation.

[0059] The electrical signal output by the controller 30 is represented as:

[0060]

[0061] wherein,

[0062]

[0063] wherein, N is the number of reference signals; L represents the length of the adaptive filter; n represents the sampling time; w i,h (n) is the hth impulse response coefficient of the adaptive filter corresponding to the Ith reference signal at the nth time; x i (n-h) is the value of the Ith reference signal at the n-h time; w i (n) is the weight coefficient vector of the filter corresponding to the Ith reference signal at the nth time; x i (n) is the signal of the Ith reference signal at the nth time; W(n) is the filter weight coefficient matrix composed of all filter weight coefficient vectors at the nth time; X(n) is the reference signal matrix composed of all reference signal vectors at the nth time.

[0064] Thus, to achieve the minimum residual error e(n), y(n) must be adjusted in real time, and the real-time adjustment of y(n) is achieved by adjusting the filter weight coefficient matrix W(n). Therefore, the noise reduction algorithm finds such a W(n) through iteration, so that the residual error e(n) is minimized.

[0065] That is, in the noise reduction process, the controller 30 updates the filter coefficients of the noise reduction algorithm according to the original noise signal and the residual noise signal to achieve adaptive filter control, and outputs the electrical signal when the residual noise signal meets the preset requirement, for example, the residual noise signal converges to the preset minimum value, so as to improve the noise reduction effect.

[0066] The embodiment collects the original noise signal and the residual noise signal through the microphone assembly 10 and the sensor assembly 20 arranged on the headrest of the target seat, respectively, and drives the secondary sound source, i.e., the loudspeaker assembly 40 inside the headrest to generate an opposite gain signal based on the electrical signal output by the controller 30 based on the above noise reduction algorithm, so as to achieve active noise reduction.

[0067] As a specific embodiment of the present application, the cabin noise reduction device is applied to a vehicle, such as Figure 2 , Figure 3 and Figure 4As shown, the in-cabin noise reduction device includes a microphone assembly 10, a sensor assembly 20, a controller 30, a speaker assembly 40, a switch assembly 50 and a power amplifier 60 connected through a wire harness 70. The microphone assembly 10 is arranged outside the vehicle to collect the noise outside the vehicle as the original noise signal and output to the controller 30 as the input of the noise reduction algorithm. The sensor assembly 20 and the speaker assembly 40 are integrated in the headrest of the target seat, wherein the sensor assembly 20 is used to collect the residual noise signal at the target position and output to the controller 30 for feedback calculation of the noise reduction algorithm. The switch assembly 50 is arranged at the armrest of the target seat to control the opening and closing of the active noise reduction function. The controller 30 and the power amplifier 60 are arranged at the bottom of the target seat, wherein the controller 30 receives the original noise signal and the residual noise signal, runs the active noise reduction algorithm to output an electric signal, and the power amplifier 60 amplifies the electric signal and drives the speaker assembly 40 to emit an opposite sound wave based on the amplified electric signal to reduce the noise at the head position of the target seat based on the principle of sound wave superposition.

[0068] This embodiment can improve the low-frequency quietness in the vehicle under a noisy external environment, such as Figure 5 As shown, the green curve is the noise outside the vehicle in the real road environment, and the blue curve is the noise in the vehicle under the same condition. It is worth noting that the difference in sound pressure level between the green curve and the blue curve can reach 25 dB(A), but from the frequency spectrum, the difference mainly comes from the medium and high frequency band above 300 Hz, and the difference in the frequency band below 300 Hz is not obvious. This is because the vehicle body itself has sound absorption and sound insulation effects and is effective for high-frequency noise components, but not obvious for low-frequency components. The red curve in the figure is the noise curve at the target position in the vehicle after the noise reduction function of the embodiment is turned on under the same condition. Comparing the red curve and the blue curve, the effective frequency band of the active noise reduction is about the low frequency band below 700 Hz, so the technical solution can complement the existing sound absorption and insulation technology of the vehicle and further improve the quietness level in the vehicle. Through the use of the in-cabin noise reduction device, the sound environment in the vehicle can be improved to the 1st environment sleep standard when the vehicle is in a 4th road noise environment. In addition to the road noise environment, the embodiment can also achieve effective noise reduction in other noise scenarios such as noisy construction sites, crowded vegetable markets, noisy commercial underground parking lots, etc. with wideband and random environmental noise scenarios, and has a wide range of applications.

[0069] In summary, according to the cabin noise reduction device in the embodiment of the application, the microphone assembly arranged on the cabin is used to collect the original noise signal, the sensor assembly arranged at the at least one target seat is used to collect the residual noise signal at the corresponding target position, the sensor assembly corresponds to the target seat one by one, and the controller outputs the electric signal based on the original noise signal and the residual noise signal collected by the sensor assembly; the loudspeaker assembly arranged at the at least one target seat is connected with the controller and is used to output the reverse sound wave based on the electric signal, and the loudspeaker assembly corresponds to the target seat one by one. Therefore, the device realizes the noise reduction processing of the target position based on the original noise signal and the residual noise signal at the target position, and improves the riding comfort of the passengers in the cabin.

[0070] Corresponding to the above embodiment, the application further provides a vehicle.

[0071] As shown in the accompanying drawings, Figure 6 the vehicle 200 in the embodiment of the application includes the above-mentioned cabin noise reduction device 100.

[0072] According to the vehicle in the embodiment of the application, the above-mentioned cabin noise reduction device is used to realize the noise reduction processing of the target position in the vehicle, and improve the riding comfort of the passengers in the vehicle.

[0073] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0074] In addition, the terms "first", "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0075] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0076] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A device for reducing noise in a cockpit, characterized in that, The cabin comprises at least one target position sensor, and the device comprises: a microphone assembly arranged on the cabin and configured to collect an original noise signal; a sensor assembly arranged at each of the target seats and configured to collect a residual noise signal at a corresponding target position, the sensor assembly corresponding to the target seat in one-to-one manner; a controller connected to the microphone assembly and each of the sensor assemblies, and configured to output an electrical signal based on the original noise signal and the residual noise signal collected by the sensor assembly; a speaker assembly arranged at each of the target seats and connected to the controller, and configured to output an inverted sound wave based on the electrical signal, the speaker assembly corresponding to the target seat in one-to-one manner.

2. The in-cabin noise reducing device of claim 1, wherein, The sensor assembly and the speaker assembly are integrated in a headrest of the target seat.

3. The in-cabin noise reducing apparatus of claim 2, wherein The speaker in the cabin multiplexes the speaker assembly.

4. The in-cabin noise reducing apparatus of claim 1, wherein The sensor assembly is arranged at a ceiling position of the cabin and above the target seat.

5. The in-cabin noise reducing apparatus of claim 1, wherein The microphone assembly comprises at least one microphone arranged inside or outside the cabin.

6. The in-cabin noise reducing apparatus of claim 1, wherein The sensor assembly comprises at least one microphone sensor arranged inside a headrest of the target seat.

7. The in-cabin noise reducing apparatus of claim 1, wherein The noise reduction device further comprises: a switch assembly arranged at the target seat and connected to the controller, the switch assembly being responsive to an opening instruction or a closing instruction to open or close the noise reduction function.

8. The in-cabin noise reducing apparatus of claim 1, wherein, The noise reduction device further comprises: a power amplifier having one end connected to the controller and the other end connected to the speaker assembly, and configured to amplify the electrical signal.

9. The in-cabin noise reducing device of any one of claims 1-8, wherein, The controller is further configured to update a filter coefficient of a noise reduction algorithm according to the original noise signal and the residual noise signal, and output the electrical signal when the residual noise signal meets a preset requirement.

10. A vehicle characterized by comprising: A cabin comprising the noise reduction device according to any one of claims 1-9.

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