CN116264071A - Vehicle noise reduction method, device, equipment and storage medium - Google Patents
Vehicle noise reduction method, device, equipment and storage medium Download PDFInfo
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- CN116264071A CN116264071A CN202111539613.9A CN202111539613A CN116264071A CN 116264071 A CN116264071 A CN 116264071A CN 202111539613 A CN202111539613 A CN 202111539613A CN 116264071 A CN116264071 A CN 116264071A
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
Abstract
The present disclosure relates to a vehicle noise reduction method, device, equipment and storage medium, the method comprising: acquiring position information of a head of a person in a vehicle; acquiring operation parameters of the vehicle engine; generating an anti-noise signal based on the positional information of the human head in the vehicle and the vehicle engine operating parameters; outputting the anti-noise signal with a speaker in the vehicle to cancel interference of a noise signal of an engine in the vehicle with the anti-noise signal. According to the method and the device, the position information of the head of the person in the vehicle is acquired, the operation parameters of the engine of the vehicle are acquired, the engine noise felt by a driver can be directionally eliminated, the pertinence is high, the engine noise at different positions of the head of the person in the vehicle can be eliminated, the flexibility is high, the active noise reduction effect can be achieved, and the driving experience is improved.
Description
Technical Field
The disclosure relates to the technical field of noise control, and in particular relates to a vehicle noise reduction method, device, equipment and storage medium.
Background
The sources of the automobile noise mainly comprise engine noise, tire rotation noise, air intake and exhaust noise and the like. The noise reduction technology commonly used at present is a passive isolation technology, damping, sound absorption materials and the like, however, the technical means have better effects on high and medium frequency noise in a vehicle, but the suppression on low frequency noise is generally poorer.
With the improvement of the requirements of automobile users and the continuous improvement of the related technologies of automobiles, the power amplifier integrated functions of active noise control (Active Noise Control, ANC) are generated so as to meet the requirements of automobile users on driving or riding experience. The active noise elimination of the whole vehicle is realized, so that the sound quality and the noise, vibration and harshness (Noise, vibration, harshness, NVH) performance of the whole vehicle are improved.
However, the existing active noise reduction technology for the engine aims at the whole vehicle, and cannot achieve directional elimination of the engine noise felt by passengers.
Disclosure of Invention
In order to solve the technical problems, the present disclosure provides a vehicle noise reduction method, device, equipment and storage medium, which can directionally eliminate engine noise felt by a driver, and has strong pertinence, and can eliminate engine noise at different positions of a human head in a vehicle, and has high flexibility.
In a first aspect, an embodiment of the present disclosure provides a vehicle noise reduction method, including:
acquiring position information of a head of a person in a vehicle;
acquiring operation parameters of the vehicle engine;
generating an anti-noise signal based on the positional information of the human head in the vehicle and the vehicle engine operating parameters;
outputting the anti-noise signal with a speaker in the vehicle to cancel interference of a noise signal of an engine in the vehicle with the anti-noise signal.
In some embodiments, the generating an anti-noise signal based on the positional information of the human head in the vehicle and the vehicle engine operating parameters comprises:
determining a characteristic parameter of an engine noise signal in the vehicle based on the position information of the head of the person in the vehicle and the vehicle engine operating parameter;
an anti-noise signal is generated based on a characteristic parameter of an engine noise signal in the vehicle.
In some embodiments, the determining the characteristic parameter of the engine noise signal in the vehicle based on the position information of the human head in the vehicle and the vehicle engine operating parameter comprises:
determining characteristic parameters of an engine noise signal in the vehicle based on the position information of the head of the person in the vehicle, the running parameters of the engine of the vehicle and a comparison relation table; the look-up table includes characteristic parameters of the noise signal at different operating parameters of the vehicle engine at different locations in the vehicle.
In some embodiments, the generating an anti-noise signal based on a characteristic parameter of an engine noise signal in the vehicle comprises:
determining a characteristic parameter of an anti-noise signal based on a characteristic parameter of an engine noise signal in the vehicle;
and generating an anti-noise signal based on the characteristic parameters of the anti-noise signal.
In some embodiments, the characteristic parameters of the noise signal include phase, frequency, and intensity;
the characteristic parameters of the anti-noise signal comprise phase, frequency and intensity;
the frequency of the noise signal is consistent with the frequency of the anti-noise signal;
the intensity of the noise signal reaching the position of the head of the person in the vehicle is consistent with the intensity of the anti-noise signal reaching the position of the head of the person in the vehicle;
the phase of the noise signal differs from the phase of the anti-noise signal by an odd multiple of one half of a period.
In some embodiments, the vehicle has at least four speakers mounted therein; the pitch angle and the yaw angle of the at least four loudspeakers are adjustable;
before the outputting of the anti-noise signal by the speaker in the vehicle, the method further includes:
and adjusting pitch angle and/or yaw angle of the speakers so that when each speaker outputs an audio signal, the beam center of each speaker is aligned with the head position of a person, and the head position is used for determining the position information of the head of the person in the vehicle.
In some embodiments, the outputting the anti-noise signal with a speaker in the vehicle comprises:
determining the output moment of anti-noise signals of each loudspeaker according to the distance between each loudspeaker and the head of a person;
and controlling the speakers to output the anti-noise signals at the anti-noise signal output time corresponding to each speaker.
In a second aspect, an embodiment of the present disclosure provides a vehicle noise reduction device, including:
a first acquisition module for acquiring position information of a human head in a vehicle;
the second acquisition module is used for acquiring the operation parameters of the vehicle engine;
a generation module for generating an anti-noise signal based on the position information of the human head in the vehicle and the vehicle engine operating parameters;
and the output module is used for outputting the anti-noise signal by using a loudspeaker in the vehicle so as to eliminate interference between a noise signal of an engine in the vehicle and the anti-noise signal.
In some embodiments, the generation module includes a determination unit and a generation unit;
a determining unit configured to determine a characteristic parameter of an engine noise signal in the vehicle based on position information of a human head in the vehicle and a vehicle engine operation parameter;
And the generation unit is used for generating an anti-noise signal based on the characteristic parameters of the engine noise signal in the vehicle.
In some embodiments, the determining unit is specifically configured to, when determining the characteristic parameter of the engine noise signal in the vehicle based on the position information of the head of the person in the vehicle and the vehicle engine operation parameter:
determining characteristic parameters of an engine noise signal in the vehicle based on the position information of the head of the person in the vehicle, the running parameters of the engine of the vehicle and a comparison relation table; the look-up table includes characteristic parameters of the noise signal at different operating parameters of the vehicle engine at different locations in the vehicle.
In some embodiments, the generating unit is specifically configured to, when generating the anti-noise signal based on a characteristic parameter of an engine noise signal in the vehicle:
determining a characteristic parameter of an anti-noise signal based on a characteristic parameter of an engine noise signal in the vehicle;
and generating an anti-noise signal based on the characteristic parameters of the anti-noise signal.
In some embodiments, the characteristic parameters of the noise signal include phase, frequency, and intensity;
the characteristic parameters of the anti-noise signal comprise phase, frequency and intensity;
The frequency of the noise signal is consistent with the frequency of the anti-noise signal;
the intensity of the noise signal reaching the position of the head of the person in the vehicle is consistent with the intensity of the anti-noise signal reaching the position of the head of the person in the vehicle;
the phase of the noise signal differs from the phase of the anti-noise signal by an odd multiple of one half of a period.
In some embodiments, the vehicle has at least four speakers mounted therein; the pitch angle and the yaw angle of the at least four loudspeakers are adjustable;
the apparatus further comprises: an adjustment module;
and the adjusting module is used for adjusting the pitch angle and/or the yaw angle of the loudspeakers so that the beam center of each loudspeaker is aligned with the head position of a person when the loudspeaker outputs an audio signal, and the head position is used for determining the position information of the head of the person in the vehicle.
In some embodiments, the output module is specifically configured to, when outputting the anti-noise signal with a speaker in the vehicle:
determining the output moment of anti-noise signals of each loudspeaker according to the distance between each loudspeaker and the head of a person;
and controlling the speakers to output the anti-noise signals at the anti-noise signal output time corresponding to each speaker.
In a third aspect, embodiments of the present disclosure provide a vehicle comprising:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method according to the first aspect.
In a fourth aspect, embodiments of the present disclosure provide a storage medium having stored thereon a computer program for execution by a processor to implement the method of the first aspect.
In a fifth aspect, the presently disclosed embodiments also provide a computer program product comprising a computer program or instructions which, when executed by a processor, implements a vehicle noise reduction method as described above.
According to the vehicle noise reduction method, device, equipment and storage medium, the running parameters of the vehicle engine are obtained by obtaining the position information of the head of the person in the vehicle. Further, an anti-noise signal is generated based on the positional information of the head of the person in the vehicle and the vehicle engine operating parameter, and the anti-noise signal is output by using a speaker in the vehicle so that the noise signal of the engine in the vehicle and the anti-noise signal interfere to cancel. Because the position information of the head of the person in the vehicle is acquired, the operation parameters of the vehicle engine are acquired, the engine noise felt by a driver can be directionally eliminated, the pertinence is strong, the engine noise at different positions of the head of the person in the vehicle can be eliminated, and the flexibility is high. And the frequency of the noise signal is consistent with the frequency of the anti-noise signal, the intensity of the noise signal reaching the position of the head of the driver in the vehicle is consistent with the intensity of the anti-noise signal reaching the position of the head of the driver in the vehicle, the phase of the noise signal is different from the phase of the anti-noise signal by odd times of one half period, the interference of the noise signal and the anti-noise signal is eliminated, the effect of active noise reduction is achieved, the driving experience is improved, and the flexibility of the vehicle noise reduction method is further improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a flow chart of a method for reducing noise in a vehicle according to an embodiment of the disclosure;
fig. 2 is a schematic diagram of an application scenario provided in an embodiment of the present disclosure;
FIG. 3 is a flow chart of a method of reducing noise in a vehicle according to another embodiment of the present disclosure;
FIG. 4 is a flow chart of a method of reducing noise in a vehicle according to another embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a vehicle noise reduction device according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a vehicle according to an embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure. The specific embodiments described herein are to be considered in an illustrative rather than a restrictive sense. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
Embodiments of the present disclosure provide a vehicle noise reduction method, which is described below in connection with specific embodiments.
Fig. 1 is a flowchart of a vehicle noise reduction method according to an embodiment of the present disclosure. The method can be applied to the application scene shown in fig. 2, wherein the application scene comprises a vehicle machine 20, an engine 21, a first loudspeaker 22, a second loudspeaker 23, a third loudspeaker 24 and a fourth loudspeaker 25. It can be appreciated that the vehicle noise reduction method provided by the embodiment of the disclosure may also be applied in other scenarios.
The vehicle noise reduction method shown in fig. 1 is described below with reference to an application scenario shown in fig. 2, and the method includes the following specific steps:
S101, acquiring position information of a head of a person in a vehicle.
Optionally, the vehicle machine 20 shown in fig. 2 determines the position of the person by using the seat gravity sensor, and then combines the pictures acquired by the camera to acquire the position information of the head of the person in the vehicle.
S102, acquiring operation parameters of a vehicle engine.
Optionally, the vehicle 20 obtains operating parameters of the vehicle engine, such as speed, temperature, etc., from a controller area network (Controller Area Network, CAN) bus.
S103, generating an anti-noise signal based on the position information of the head of the person in the vehicle and the running parameters of the engine of the vehicle.
Optionally, under various running conditions such as different rotation speeds and different temperatures of the engine, the noise signals of the engine are collected at various positions in the carriage by utilizing sound receiving and detecting equipment (such as a microphone), so that an engine noise signal library is obtained. The vehicle 20 takes as input the position information of the human head in the vehicle and the vehicle engine operating parameters, and an operating algorithm such as a dichotomy can find the corresponding engine noise signal from the engine noise signal library and calculate the intensity, sound direction, etc. of the anti-noise signal. Further, the vehicle 20 generates an anti-noise signal based on the intensity, the sound direction, and the like of the calculated anti-noise signal.
S104, outputting an anti-noise signal by using a loudspeaker in the vehicle so as to eliminate interference between a noise signal of an engine in the vehicle and the anti-noise signal.
The vehicle 20 as shown in fig. 2 outputs the generated anti-noise signal through a speaker in the vehicle to cancel the interference of the noise signal of the engine in the vehicle with the anti-noise signal.
The embodiment of the disclosure obtains the operation parameters of the vehicle engine by obtaining the position information of the head of the person in the vehicle. Further, an anti-noise signal is generated based on the positional information of the human head in the vehicle and the vehicle engine operating parameters, and the anti-noise signal is output by using a speaker in the vehicle so that the noise signal of the engine in the vehicle and the anti-noise signal interfere to cancel. Because the position information of the head of the person in the vehicle is acquired, the operation parameters of the engine of the vehicle are acquired, the engine noise felt by the driver can be directionally eliminated, the pertinence is strong, the engine noise at different positions of the head of the person in the vehicle can be eliminated, the flexibility is high, the active noise reduction effect is achieved, and the driving experience is improved.
On the basis of the above embodiment, generating an anti-noise signal based on position information of a human head in a vehicle and vehicle engine operating parameters, includes: determining a characteristic parameter of an engine noise signal in the vehicle based on the position information of the human head in the vehicle and the vehicle engine operating parameter; an anti-noise signal is generated based on a characteristic parameter of an engine noise signal in the vehicle.
The vehicle 20 shown in fig. 2 takes as input the position information of the human head in the vehicle and the vehicle engine operation parameters, and the operation algorithm can find the corresponding characteristic parameters of the engine noise signal from the engine noise signal library, and calculate the characteristic parameters of the anti-noise signal according to the characteristic parameters of the engine noise signal. Further, the vehicle 20 generates an anti-noise signal based on the calculated characteristic parameter of the anti-noise signal.
Optionally, the characteristic parameters of the noise signal include phase, frequency and intensity; the characteristic parameters of the anti-noise signal include phase, frequency and intensity; the frequency of the noise signal is consistent with the frequency of the anti-noise signal; the intensity of the noise signal reaching the position of the human head in the vehicle is consistent with the intensity of the anti-noise signal reaching the position of the human head in the vehicle; the phase of the noise signal differs from the phase of the anti-noise signal by an odd multiple of one half of a period.
The characteristic parameters of the engine noise signal emitted from the engine 21 as shown in fig. 2 include phase, frequency and intensity, and the characteristic parameters of the anti-noise signal emitted from the speaker include phase, frequency and intensity. The frequency of the noise signal is consistent with the frequency of the anti-noise signal, the intensity of the noise signal reaching the position of the head of the person in the vehicle is consistent with the intensity of the anti-noise signal reaching the position of the head of the person in the vehicle, the phase of the noise signal is different from the phase of the anti-noise signal by odd times of one half period, and the interference of the noise signal and the anti-noise signal is eliminated.
The embodiment of the disclosure obtains the operation parameters of the vehicle engine by obtaining the position information of the head of the person in the vehicle. Further, based on the position information of the head of the person in the vehicle and the vehicle engine operation parameters, the characteristic parameters of the engine noise signal in the vehicle are determined, the anti-noise signal is generated based on the characteristic parameters of the engine noise signal in the vehicle, and the anti-noise signal is output by using a loudspeaker in the vehicle so that the interference between the noise signal of the engine in the vehicle and the anti-noise signal is eliminated. Because the position information of the head of the person in the vehicle is acquired, the operation parameters of the engine of the vehicle are acquired, the engine noise felt by a driver can be directionally eliminated, the pertinence is strong, the engine noise at different positions of the head of the person in the vehicle can be eliminated, and the flexibility is high. And the frequency of the noise signal is consistent with the frequency of the anti-noise signal, the intensity of the noise signal reaching the position of the head of the driver in the vehicle is consistent with the intensity of the anti-noise signal reaching the position of the head of the driver in the vehicle, the phase of the noise signal is different from the phase of the anti-noise signal by odd times of one half period, the interference of the noise signal and the anti-noise signal is eliminated, the effect of active noise reduction is achieved, the driving experience is improved, and the flexibility of the vehicle noise reduction method is further improved.
Fig. 3 is a flowchart of a vehicle noise reduction method according to another embodiment of the present disclosure, as shown in fig. 3, the method includes the following steps:
s301, acquiring position information of a head of a person in a vehicle.
Specifically, the implementation process and principle of S301 and S101 are identical, and will not be described herein.
S302, acquiring operation parameters of a vehicle engine.
Specifically, the implementation process and principle of S302 and S102 are consistent, and will not be described herein.
S303, determining characteristic parameters of an engine noise signal in the vehicle based on the position information of the head of the person in the vehicle, the running parameters of the engine of the vehicle and a comparison relation table; the look-up table includes characteristic parameters of the noise signal at different operating parameters of the vehicle engine at different locations in the vehicle.
The vehicle machine 20 shown in fig. 2 finds the characteristic parameters of the corresponding engine noise signals according to the position information of the human head in the vehicle, the vehicle engine operation parameters and a comparison relation table, wherein the comparison relation table comprises the characteristic parameters of the noise signals under different operation parameters of the vehicle engine at different positions in the vehicle. The method provided by the embodiment does not need calculation and only needs searching.
S304, determining characteristic parameters of an anti-noise signal based on characteristic parameters of an engine noise signal in the vehicle.
The vehicle device 20 shown in fig. 2 determines the characteristic parameters of the engine noise signal in the vehicle based on the position information of the human head in the vehicle, the vehicle engine operation parameters, and the map, and then calculates the characteristic parameters of the anti-noise signal from the characteristic parameters of the engine noise signal.
S305, generating an anti-noise signal based on the characteristic parameters of the anti-noise signal.
After determining the characteristic parameters of the anti-noise signal, the vehicle 20 generates the anti-noise signal from the characteristic parameters of the anti-noise signal.
S306, outputting an anti-noise signal by using a loudspeaker in the vehicle so as to eliminate interference between a noise signal of an engine in the vehicle and the anti-noise signal.
Specifically, the implementation process and principle of S306 and S104 are consistent, and will not be described herein.
The embodiment of the disclosure obtains the operation parameters of the vehicle engine by obtaining the position information of the head of the person in the vehicle. Further, determining a characteristic parameter of an engine noise signal in the vehicle based on the position information of the human head in the vehicle, the vehicle engine operating parameter and the comparison relation table; the look-up table includes characteristic parameters of the noise signal at different operating parameters of the vehicle engine at different locations in the vehicle. How, the characteristic parameter of the anti-noise signal is determined based on the characteristic parameter of the engine noise signal in the vehicle, the anti-noise signal is generated based on the characteristic parameter of the anti-noise signal, and the anti-noise signal is output by using the loudspeaker in the vehicle so that the interference between the noise signal of the engine in the vehicle and the anti-noise signal is canceled. Because the position information of the head of the person in the vehicle is acquired, the operation parameters of the engine of the vehicle are acquired, the engine noise felt by a driver can be directionally eliminated, the pertinence is strong, the engine noise at different positions of the head of the person in the vehicle can be eliminated, and the flexibility is high. And the frequency of the noise signal is consistent with the frequency of the anti-noise signal, the intensity of the noise signal reaching the position of the head of the driver in the vehicle is consistent with the intensity of the anti-noise signal reaching the position of the head of the driver in the vehicle, the phase of the noise signal is different from the phase of the anti-noise signal by odd times of one half period, the interference of the noise signal and the anti-noise signal is eliminated, the active noise reduction effect is achieved, and therefore driving experience is improved. According to the embodiment, the characteristic parameters of the engine noise signals in the vehicle can be determined only according to the position information of the head of the person in the vehicle, the running parameters of the engine of the vehicle and the comparison relation table, calculation is not needed, and the noise reduction method of the vehicle is simpler and more convenient.
Fig. 4 is a flowchart of a vehicle noise reduction method according to another embodiment of the present disclosure, as shown in fig. 4, the method includes the following steps:
s401, acquiring position information of a head of a person in a vehicle.
Specifically, the implementation process and principle of S401 and S101 are identical, and will not be described herein.
S402, acquiring operation parameters of a vehicle engine.
Specifically, the implementation process and principle of S402 and S102 are consistent, and will not be described herein.
S403, generating an anti-noise signal based on the position information of the human head in the vehicle and the vehicle engine operation parameters.
Specifically, the implementation process and principle of S403 and S103 are identical, and will not be described herein.
S404, adjusting pitch angle and/or yaw angle of the speakers so that when each speaker outputs an audio signal, the beam center of each speaker is aligned with the head position of a person, and the head position is used for determining the position information of the head of the person in the vehicle.
As shown in fig. 2, at least four speakers are installed in the vehicle, and are dispersedly arranged around the cabin so that sound beams emitted from the at least four speakers can cover the head of a person by 360 degrees, and pitch angles and yaw angles of the at least four speakers are adjustable. The vehicle 20 adjusts pitch and/or yaw angles of the first speaker 22, the second speaker 23, the third speaker 24, and the fourth speaker 25 so that the beam center of each speaker is aligned with the human head when outputting the audio signal, thereby ensuring that the noise signal and the anti-noise signal interfere with each other around the human head.
S405, determining the output moment of anti-noise signals of the speakers according to the distance between the speakers and the head of the person.
After the pitch angle and/or yaw angle of the four speakers are adjusted, the vehicle 20 determines the output timing of the anti-noise signal of each speaker according to the distance between the four speakers and the head of the person. Sequentially transmitting according to the distance between the head and the head of the person, separating the head from the head to the tail, separating the head from the tail to the tail,
optionally, the time T111 when the engine emits noise, the time when the engine noise reaches the head of the person is T222; the moment when the speaker I22 sends the anti-noise is T1, and the moment when the anti-noise reaches the head of the person is T11; the moment when the second speaker 23 sends the anti-noise is T2, and the moment when the anti-noise reaches the head of the person is T22; the time when the speaker three 24 sends the anti-noise is T3, and the time when the anti-noise reaches the head of the person is T33; the moment when the speaker four 25 sends the anti-noise is T4, and the moment when the anti-noise reaches the head of the person is T44; the time when the anti-noise signal sent by each loudspeaker reaches the head of the person is the same as the time when the engine noise signal reaches the head of the person.
S406, controlling the speakers to output the anti-noise signals at the anti-noise signal output time corresponding to each speaker.
After the vehicle 20 shown in fig. 2 determines the output timing of the anti-noise signal of each speaker, the speaker is controlled to output the anti-noise signal at the anti-noise signal output timing corresponding to each speaker, thereby ensuring that the interference between the noise signal and the anti-noise signal is canceled around the human head.
The embodiment of the disclosure obtains the operation parameters of the vehicle engine by obtaining the position information of the head of the person in the vehicle. Further, based on the position information of the human head in the vehicle and the vehicle engine operating parameters, an anti-noise signal is generated, and the pitch angle and/or yaw angle of the speakers are adjusted so that the beam center of each speaker is aligned with the human head when the speaker outputs an audio signal. Then, according to the distance between each speaker and the head of the person, the output time of the anti-noise signal of each speaker is determined, and the speaker is controlled to output the anti-noise signal at the anti-noise signal output time corresponding to each speaker. Because the position information of the head of the person in the vehicle is acquired, the operation parameters of the engine of the vehicle are acquired, the engine noise felt by a driver can be directionally eliminated, the pertinence is strong, the engine noise at different positions of the head of the person in the vehicle can be eliminated, and the flexibility is high. And the frequency of the noise signal is consistent with the frequency of the anti-noise signal, the intensity of the noise signal reaching the position of the head of the driver in the vehicle is consistent with the intensity of the anti-noise signal reaching the position of the head of the driver in the vehicle, the phase of the noise signal is different from the phase of the anti-noise signal by odd times of one half period, the interference of the noise signal and the anti-noise signal is eliminated, the effect of active noise reduction is achieved, the driving experience is improved, and the flexibility of the vehicle noise reduction method is further improved. And the sound wave beams emitted by the four loudspeakers can cover the head of a person by 360 degrees, so that interference cancellation of noise signals and anti-noise signals around the head of the person is ensured, and active noise reduction can be performed in a targeted manner better.
Fig. 5 is a schematic structural diagram of a vehicle noise reduction device according to an embodiment of the disclosure. The vehicle noise reducer may be a vehicle machine as described in the above embodiments, or the vehicle noise reducer may be a part or component in the vehicle machine. The vehicle noise reduction device provided in the embodiment of the present disclosure may execute the processing flow provided in the embodiment of the vehicle noise reduction method, as shown in fig. 5, where the vehicle noise reduction device 50 includes: a first acquisition module 51, a second acquisition module 52, a generation module 53, an output module 54; wherein the first acquisition module 51 is used for acquiring position information of the head of the person in the vehicle; the second acquisition module 52 is configured to acquire an operating parameter of the vehicle engine; the generation module 53 is configured to generate an anti-noise signal based on the position information of the head of the person in the vehicle and the vehicle engine operating parameters; the output module 54 is configured to output the anti-noise signal using a speaker in the vehicle to cancel interference of a noise signal of an engine in the vehicle with the anti-noise signal.
Optionally, the generating module 53 includes a determining unit 531 and a generating unit 532; wherein the determining unit 531 is configured to determine a characteristic parameter of an engine noise signal in the vehicle based on position information of a head of a person in the vehicle and a vehicle engine operation parameter; the generating unit 532 is configured to generate an anti-noise signal based on a characteristic parameter of an engine noise signal in the vehicle.
Optionally, the determining unit 531 is specifically configured to, when determining the characteristic parameter of the engine noise signal in the vehicle based on the position information of the head of the person in the vehicle and the vehicle engine operation parameter: determining characteristic parameters of an engine noise signal in the vehicle based on the position information of the head of the person in the vehicle, the running parameters of the engine of the vehicle and a comparison relation table; the look-up table includes characteristic parameters of the noise signal at different operating parameters of the vehicle engine at different locations in the vehicle.
Optionally, the generating unit 532 is specifically configured to, when generating the anti-noise signal based on the characteristic parameter of the engine noise signal in the vehicle: determining a characteristic parameter of an anti-noise signal based on a characteristic parameter of an engine noise signal in the vehicle; and generating an anti-noise signal based on the characteristic parameters of the anti-noise signal.
Optionally, the characteristic parameters of the noise signal include phase, frequency and intensity; the characteristic parameters of the anti-noise signal comprise phase, frequency and intensity; the frequency of the noise signal is consistent with the frequency of the anti-noise signal; the intensity of the noise signal reaching the position of the head of the person in the vehicle is consistent with the intensity of the anti-noise signal reaching the position of the head of the person in the vehicle; the phase of the noise signal differs from the phase of the anti-noise signal by an odd multiple of one half of a period.
Optionally, at least four speakers are installed in the vehicle; the pitch angle and the yaw angle of the at least four loudspeakers are adjustable; the apparatus 50 further comprises: an adjustment module 55; the adjustment module 55 is configured to adjust the pitch angle and/or yaw angle of the speakers so that, when each speaker outputs an audio signal, its beam center is aligned with a human head position used to determine positional information of the human head in a vehicle.
Optionally, the output module 54 is specifically configured to, when outputting the anti-noise signal by using a speaker in the vehicle: determining the output moment of anti-noise signals of each loudspeaker according to the distance between each loudspeaker and the head of a person; and controlling the speakers to output the anti-noise signals at the anti-noise signal output time corresponding to each speaker.
The vehicle noise reduction device of the embodiment shown in fig. 5 may be used to implement the technical solution of the above method embodiment, and its implementation principle and technical effects are similar, and will not be described herein again.
Fig. 6 is a schematic structural view of a vehicle in an embodiment of the present disclosure. Referring now in particular to fig. 6, a schematic structural diagram of a vehicle 600 suitable for use in implementing embodiments of the present disclosure is shown. The vehicle illustrated in fig. 6 is merely an example, and should not be construed as limiting the functionality and scope of use of the disclosed embodiments.
As shown in fig. 6, a vehicle 600 may include a processing device (e.g., a central processor, a graphics processor, etc.) 601 that may perform various suitable actions and processes to implement the vehicle noise reduction method of embodiments as described in the present disclosure according to a program stored in a Read Only Memory (ROM) 602 or a program loaded from a storage device 608 into a Random Access Memory (RAM) 603. In the RAM 603, various programs and data required for the operation of the vehicle 600 are also stored. The processing device 601, the ROM 602, and the RAM 603 are connected to each other through a bus 604. An input/output (I/O) interface 605 is also connected to bus 604.
In general, the following devices may be connected to the I/O interface 605: input devices 606 including, for example, a touch screen, touchpad, keyboard, mouse, camera, microphone, accelerometer, gyroscope, and the like; an output device 607 including, for example, a Liquid Crystal Display (LCD), a speaker, a vibrator, and the like; storage 608 including, for example, magnetic tape, hard disk, etc.; and a communication device 609. The communication device 609 may allow the vehicle 600 to communicate with other devices wirelessly or by wire to exchange data. While fig. 6 shows a vehicle 600 having various devices, it is to be understood that not all of the illustrated devices are required to be implemented or provided. More or fewer devices may be implemented or provided instead.
In particular, according to embodiments of the present disclosure, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a non-transitory computer readable medium, the computer program comprising program code for performing the method shown in the flowcharts, thereby implementing the access control method as described above. In such an embodiment, the computer program may be downloaded and installed from a network via communication means 609, or from storage means 608, or from ROM 602. The above-described functions defined in the methods of the embodiments of the present disclosure are performed when the computer program is executed by the processing device 601.
It should be noted that the computer readable medium described in the present disclosure may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this disclosure, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present disclosure, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, fiber optic cables, RF (radio frequency), and the like, or any suitable combination of the foregoing.
In some implementations, the clients, servers may communicate using any currently known or future developed network protocol, such as HTTP (HyperText Transfer Protocol ), and may be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), the internet (e.g., the internet), and peer-to-peer networks (e.g., ad hoc peer-to-peer networks), as well as any currently known or future developed networks.
The computer readable medium may be contained in the vehicle; or may be present alone without being fitted into the vehicle.
The computer readable medium carries one or more programs which, when executed by the vehicle, cause the vehicle to: acquiring position information of a head of a person in a vehicle; acquiring operation parameters of the vehicle engine; generating an anti-noise signal based on the positional information of the human head in the vehicle and the vehicle engine operating parameters; outputting the anti-noise signal with a speaker in the vehicle to cancel interference of a noise signal of an engine in the vehicle with the anti-noise signal.
Alternatively, the vehicle may perform other steps described in the above embodiments when one or more of the above programs are executed by the vehicle.
Computer program code for carrying out operations of the present disclosure may be written in one or more programming languages, including, but not limited to, an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units involved in the embodiments of the present disclosure may be implemented by means of software, or may be implemented by means of hardware. Wherein the names of the units do not constitute a limitation of the units themselves in some cases.
The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an Application Specific Standard Product (ASSP), a system on a chip (SOC), a Complex Programmable Logic Device (CPLD), and the like.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in this disclosure is not limited to the specific combinations of features described above, but also covers other embodiments which may be formed by any combination of features described above or equivalents thereof without departing from the spirit of the disclosure. Such as those described above, are mutually substituted with the technical features having similar functions disclosed in the present disclosure (but not limited thereto).
Moreover, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.
Claims (13)
1. A method of noise reduction in a vehicle, comprising:
acquiring position information of a head of a person in a vehicle;
acquiring operation parameters of the vehicle engine;
generating an anti-noise signal based on the positional information of the human head in the vehicle and the vehicle engine operating parameters;
outputting the anti-noise signal with a speaker in the vehicle to cancel interference of a noise signal of an engine in the vehicle with the anti-noise signal.
2. The method of claim 1, wherein the generating an anti-noise signal based on the positional information of the human head in the vehicle and the vehicle engine operating parameters comprises:
determining a characteristic parameter of an engine noise signal in the vehicle based on the position information of the head of the person in the vehicle and the vehicle engine operating parameter;
An anti-noise signal is generated based on a characteristic parameter of an engine noise signal in the vehicle.
3. The method of claim 2, wherein the determining characteristic parameters of the engine noise signal in the vehicle based on the positional information of the human head in the vehicle and vehicle engine operating parameters comprises:
determining characteristic parameters of an engine noise signal in the vehicle based on the position information of the head of the person in the vehicle, the running parameters of the engine of the vehicle and a comparison relation table; the look-up table includes characteristic parameters of the noise signal at different operating parameters of the vehicle engine at different locations in the vehicle.
4. The method of claim 3, wherein the step of,
the characteristic parameters of the noise signal comprise phase, frequency and intensity;
the characteristic parameters of the anti-noise signal comprise phase, frequency and intensity;
the frequency of the noise signal is consistent with the frequency of the anti-noise signal;
the intensity of the noise signal reaching the position of the head of the person in the vehicle is consistent with the intensity of the anti-noise signal reaching the position of the head of the person in the vehicle;
the phase of the noise signal differs from the phase of the anti-noise signal by an odd multiple of one half of a period.
5. The method of claim 1, wherein at least four speakers are mounted in the vehicle, the at least four speakers being arranged discretely around the cabin so that sound beams emitted by the at least four speakers can cover 360 degrees of the human head; the pitch angle and the yaw angle of the at least four loudspeakers are adjustable;
before the outputting of the anti-noise signal by the speaker in the vehicle, the method further includes:
and adjusting pitch angle and/or yaw angle of the speakers so that when each speaker outputs an audio signal, the beam center of each speaker is aligned with the head position of a person, and the head position is used for determining the position information of the head of the person in the vehicle.
6. The method of claim 5, wherein outputting the anti-noise signal with a speaker in the vehicle comprises:
determining the output moment of anti-noise signals of each loudspeaker according to the distance between each loudspeaker and the head of a person;
and controlling the speakers to output the anti-noise signals at the anti-noise signal output time corresponding to each speaker.
7. A vehicle noise reduction device, characterized by comprising:
A first acquisition module for acquiring position information of a human head in a vehicle;
the second acquisition module is used for acquiring the operation parameters of the vehicle engine;
a generation module for generating an anti-noise signal based on the position information of the human head in the vehicle and the vehicle engine operating parameters;
and the output module is used for outputting the anti-noise signal by using a loudspeaker in the vehicle so as to eliminate interference between a noise signal of an engine in the vehicle and the anti-noise signal.
8. The apparatus of claim 7, wherein the generation module comprises a determination unit and a generation unit;
a determining unit configured to determine a characteristic parameter of an engine noise signal in the vehicle based on position information of a human head in the vehicle and a vehicle engine operation parameter;
and the generation unit is used for generating an anti-noise signal based on the characteristic parameters of the engine noise signal in the vehicle.
9. The apparatus according to claim 8, wherein the determining unit is configured, when determining the characteristic parameter of the engine noise signal in the vehicle based on the position information of the head of the person in the vehicle and the vehicle engine operation parameter, to:
Determining characteristic parameters of an engine noise signal in the vehicle based on the position information of the head of the person in the vehicle, the running parameters of the engine of the vehicle and a comparison relation table; the look-up table includes characteristic parameters of the noise signal at different operating parameters of the vehicle engine at different locations in the vehicle.
10. The apparatus of claim 6, wherein at least four speakers are mounted in the vehicle; the pitch angle and the yaw angle of the at least four loudspeakers are adjustable;
the apparatus further comprises: an adjustment module;
and the adjusting module is used for adjusting the pitch angle and/or the yaw angle of the loudspeakers so that the beam center of each loudspeaker is aligned with the head position of a person when the loudspeaker outputs an audio signal, and the head position is used for determining the position information of the head of the person in the vehicle.
11. The apparatus of claim 10, wherein the output module, when outputting the anti-noise signal with a speaker in the vehicle, is specifically configured to:
determining the output moment of anti-noise signals of each loudspeaker according to the distance between each loudspeaker and the head of a person;
and controlling the speakers to output the anti-noise signals at the anti-noise signal output time corresponding to each speaker.
12. A vehicle, characterized by comprising:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any one of claims 1-6.
13. A storage medium having stored thereon a computer program which, when executed by a processor, implements the method of any of claims 1-6.
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| CN202111539613.9A CN116264071A (en) | 2021-12-15 | 2021-12-15 | Vehicle noise reduction method, device, equipment and storage medium |
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| CN202111539613.9A CN116264071A (en) | 2021-12-15 | 2021-12-15 | Vehicle noise reduction method, device, equipment and storage medium |
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