CN116653830A - In-vehicle noise control method, device, equipment and readable storage medium - Google Patents
In-vehicle noise control method, device, equipment and readable storage medium Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/037—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for occupant comfort, e.g. for automatic adjustment of appliances according to personal settings, e.g. seats, mirrors, steering wheel
- B60R16/0373—Voice control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/037—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for occupant comfort, e.g. for automatic adjustment of appliances according to personal settings, e.g. seats, mirrors, steering wheel
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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
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
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Abstract
The invention provides an in-vehicle noise control method, a device, equipment and a readable storage medium, comprising the following steps: when a time domain signal acquired by an in-car microphone is not interfered by a loudspeaker, carrying out Fourier transform on the time domain signal acquired by the in-car microphone to obtain a frequency domain signal, and determining a frequency domain signal of in-car background noise; superposing the frequency domain signal of the background noise in the vehicle and the frequency domain signal of the host voice, carrying out weighting treatment on the frequency domain signal obtained by superposition and energy superposition on the same frequency, and generating a frequency domain signal of the synthesized voice; and carrying out inverse Fourier transform on the frequency domain signal of the synthesized voice to obtain a time domain signal, and generating and outputting an acoustic wave signal of the synthesized voice through a loudspeaker by the time domain signal of the synthesized voice. The invention can make the passengers in the car more clearly hear important information such as Bluetooth voice, prompt tone, media voice and the like.
Description
Technical Field
The present invention relates to the field of noise control, and in particular, to a method, an apparatus, a device, and a readable storage medium for controlling noise in a vehicle.
Background
Nowadays, people have higher and higher requirements on vehicle comfort, and the requirements on noise in the vehicle by enterprises of various vehicle types are also more and more strict, however, the noise in the vehicle cannot be completely eliminated by the existing vehicle. Noise in the vehicle can produce noise shielding effect on the passengers listening to the multimedia music, so that the passengers can not listen to the multimedia music, and the evaluation experience of the multimedia music is affected; in addition, in-car noise can also produce the interference to important information such as in-car radio, warning tone and bluetooth phone, makes in-car passenger unable to hear important information such as radio, warning tone and bluetooth phone, has influenced passenger's riding experience.
Disclosure of Invention
The invention mainly aims to provide an in-vehicle noise control method, device and equipment and a readable storage medium, and aims to carry out weighting processing on a frequency domain signal obtained by superposition and energy superposition on the same frequency by superposing the frequency domain signal of in-vehicle background noise and the frequency domain signal of host voice, and finally play out a sound wave signal through a loudspeaker so that in-vehicle passengers can hear more clear important voice information such as Bluetooth voice, multimedia voice and the like.
In a first aspect, the present invention provides an in-vehicle noise control method, including:
when a time domain signal acquired by an in-car microphone is not interfered by a loudspeaker, carrying out Fourier transform on the time domain signal acquired by the in-car microphone to obtain a frequency domain signal, and determining a frequency domain signal of in-car background noise;
superposing the frequency domain signal of the background noise in the vehicle and the frequency domain signal of the host voice, carrying out weighting treatment on the frequency domain signal obtained by superposition and energy superposition on the same frequency, and generating a frequency domain signal of the synthesized voice;
and carrying out inverse Fourier transform on the frequency domain signal of the synthesized voice to obtain a time domain signal, and generating and outputting an acoustic wave signal of the synthesized voice through a loudspeaker by the time domain signal of the synthesized voice.
Optionally, the weighting process is an a weighting process.
Optionally, the in-vehicle noise control method further includes:
determining a noise value in the vehicle according to the sound pressure signal of the microphone in the vehicle;
and outputting a prompt for controlling the vehicle according to the noise value.
Optionally, the step of outputting a prompt for controlling the vehicle according to the noise value includes:
detecting whether the noise value is larger than a preset decibel value or not according to the noise value;
if the noise value is larger than the preset decibel value, detecting whether the current gear of the blower is larger than a preset gear or not;
and if the current blower gear is larger than the preset gear, controlling the vehicle to reduce the current blower gear.
Optionally, the step of outputting a prompt for controlling the vehicle according to the noise value further includes:
detecting whether the noise value is larger than a preset decibel value or not according to the noise value;
if the noise value is larger than the preset decibel value, detecting whether the current driving mode is an energy-saving mode or not;
and if the current driving mode is not the energy-saving mode, outputting a prompt for adjusting the vehicle to enter the energy-saving mode.
Optionally, the step of outputting a prompt for controlling the vehicle according to the noise value further includes:
detecting whether the noise value is larger than a preset decibel value or not according to the noise value;
if the noise value is larger than the preset decibel value, detecting whether the current engine speed is larger than the preset engine speed or not;
and if the current engine speed is greater than the preset engine speed, outputting a prompt for reducing the current engine speed.
Optionally, the in-vehicle noise control method further includes:
and determining the noise level according to the noise value, and outputting a prompt of the noise level.
In a second aspect, the present invention also provides an in-vehicle noise control apparatus, including:
the first determining module is used for carrying out Fourier transform on the time domain signals collected by the in-car microphone to obtain frequency domain signals when the time domain signals collected by the in-car microphone are not interfered by the loudspeaker, and determining the frequency domain signals of the in-car background noise;
the first generation module is used for superposing the frequency domain signal of the in-car background noise and the frequency domain signal of the host voice, carrying out weighting processing on the frequency domain signal obtained by superposition and superposing the energy on the same frequency, and generating the frequency domain signal of the synthesized voice;
and the second generation module is used for carrying out inverse Fourier transform on the frequency domain signal of the synthesized voice to obtain a time domain signal, and generating and outputting the sound wave signal of the synthesized voice through a loudspeaker.
In a third aspect, the present invention also provides an in-vehicle noise control apparatus including a processor, a memory, and an in-vehicle noise control program stored on the memory and executable by the processor, wherein the in-vehicle noise control program, when executed by the processor, implements the steps of the in-vehicle noise control method as described above.
In a fourth aspect, the present invention also provides a readable storage medium having an in-vehicle noise control program stored thereon, wherein the in-vehicle noise control program, when executed by a processor, implements the steps of the in-vehicle noise control method as described above.
When a time domain signal acquired by an in-car microphone is not interfered by a loudspeaker, carrying out Fourier transform on the time domain signal acquired by the in-car microphone to obtain a frequency domain signal, and determining a frequency domain signal of in-car background noise; superposing the frequency domain signal of the background noise in the vehicle and the frequency domain signal of the host voice, carrying out weighting treatment on the frequency domain signal obtained by superposition and energy superposition on the same frequency, and generating a frequency domain signal of the synthesized voice; and carrying out inverse Fourier transform on the frequency domain signal of the synthesized voice to obtain a time domain signal, and generating and outputting an acoustic wave signal of the synthesized voice through a loudspeaker by the time domain signal of the synthesized voice. According to the invention, when the distance between the microphone in the vehicle and the loudspeaker is too far, the loudspeaker is not started or the audio frequency emitted by the loudspeaker is too small, the time domain signal collected by the microphone in the vehicle is considered to be not interfered by the loudspeaker, and the time domain signal collected by the microphone in the vehicle is subjected to Fourier transformation to obtain a frequency domain signal, so that the frequency domain signal is determined to be the frequency domain signal of the background noise in the vehicle; the method comprises the steps of superposing a frequency domain signal of background noise in a vehicle and a frequency domain signal of host voice, attenuating and superposing a high frequency band or a low frequency band insensitive to human ears in the frequency domain signal, accumulating and strengthening energy on the same frequency in the frequency domain signal obtained by superposition to finally obtain a frequency domain signal of synthesized voice, obtaining a time domain signal of the synthesized voice through inverse Fourier transform, and generating a sound wave signal of the synthesized voice by a loudspeaker to play the time domain signal of the synthesized voice. Therefore, passengers in the automobile can hear important information such as Bluetooth voice, prompt tone, media voice and the like more clearly.
Drawings
Fig. 1 is a schematic flow chart of a first embodiment of an in-vehicle noise control method according to an embodiment of the present invention;
fig. 2 is a schematic spectrum synthesis diagram of a frequency domain signal for determining a synthesized voice in a first embodiment of an in-vehicle noise control method according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a second embodiment of an in-vehicle noise control method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a display interface of an in-vehicle noise control method according to an embodiment of the present invention;
fig. 5 is a schematic functional block diagram of an in-vehicle noise control device according to an embodiment of the present invention;
fig. 6 is a schematic hardware structure of an in-vehicle noise control device according to an embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In a first aspect, an embodiment of the present invention provides an in-vehicle noise control method.
Referring to fig. 1, fig. 1 is a flowchart of a first embodiment of an in-vehicle noise control method according to an embodiment of the present invention. As shown in fig. 1, in one embodiment, the method for controlling noise in a vehicle includes:
step S10-1, when a time domain signal acquired by an in-car microphone is not interfered by a loudspeaker, carrying out Fourier transform on the time domain signal acquired by the in-car microphone to obtain a frequency domain signal, and determining a frequency domain signal of in-car background noise;
in this embodiment, various noises cannot be effectively absorbed due to a small space in the vehicle during running of the vehicle, and resonance may occur in the vehicle when the noises collide with each other. When the time domain signal collected by the microphone in the vehicle is not interfered by the speaker (for example, when the microphone in the vehicle is far away from the speaker, the speaker is in a closed state or the volume of the speaker is less than 5 db, the sound wave signal emitted by the speaker is not collected by the microphone in the vehicle, and a time domain voltage signal is not generated, wherein the "5 db" is only used for illustration), the microphone in the vehicle collects in real time and converts the sound wave signal of various noises into the time domain signal, and then the time domain signal is converted into the frequency domain signal through fourier transformation, so that the frequency domain signal is used as the frequency domain signal of the background noise in the vehicle.
Step S20-1, superposing the frequency domain signal of the in-car background noise and the frequency domain signal of the host voice, carrying out weighting treatment on the frequency domain signal obtained by superposition and energy superposition on the same frequency, and generating a frequency domain signal of the synthesized voice;
in this embodiment, a frequency domain signal of the background noise in the vehicle and a frequency domain signal of the host voice are superimposed, and a weighting process and an energy superposition strengthening process on the same frequency are performed on a frequency segment insensitive to human ears in the superimposed frequency domain signal, so as to finally obtain a frequency domain signal of the synthesized voice.
And S30-1, carrying out inverse Fourier transform on the frequency domain signal of the synthesized voice to obtain a time domain signal, and generating and outputting an acoustic wave signal of the synthesized voice through a loudspeaker by the time domain signal of the synthesized voice.
In this embodiment, the frequency domain signal of the synthesized voice is subjected to inverse fourier transform to obtain a time domain signal of the synthesized voice, the time domain signal of the synthesized voice is transmitted to a speaker, the speaker receives the time domain signal of the synthesized voice, and then the sound wave signal of the synthesized voice is generated by vibration and propagated.
Further, in an embodiment, referring to fig. 2, fig. 2 is a schematic spectrum synthesis diagram of a frequency domain signal for determining a synthesized voice in a first embodiment of an in-vehicle noise control method according to an embodiment of the present invention, and as shown in fig. 2, the in-vehicle noise control method includes:
the weighting process is an A weighting process.
In this embodiment, there are various modes of weighting the frequency domain signals, such as a weighting, B weighting, C weighting, D weighting, etc., where the result of the a weighting is very close to the sense of the human ear according to the characteristics of the human ear, and the high-frequency band or the low-frequency band insensitive to the human ear of the frequency domain signals obtained by superposition can be processed, so the weighting mode here is the a weighting.
Further, in an embodiment, referring to fig. 3, fig. 3 is a flow chart of a second embodiment of an in-vehicle noise control method according to an embodiment of the present invention. As shown in fig. 3, the in-vehicle noise control method further includes:
s10-2, determining a noise value in the vehicle according to a sound pressure signal of a microphone in the vehicle;
in this embodiment, during running of the vehicle, due to the small space in the vehicle, various noises cannot be effectively absorbed, resonance sometimes occurs in the vehicle due to mutual collision, and the in-vehicle microphone can collect and convert acoustic signals of various noises into voltage signals in a time domain in real time and display the voltage signals as noise values in the vehicle.
And step S20-2, outputting a prompt for controlling the vehicle according to the noise value.
In this embodiment, considering the situation of the ears of the human body, if the noise value in the vehicle meets the condition that is harmful to the health of the ears of the human body, a prompt for controlling the vehicle needs to be output, such as outputting prompt information for reducing the gear of the blower, adjusting the driving mode to the energy-saving mode or reducing the rotation speed of the engine.
Further, in one embodiment, step S20-2 includes:
step S201-2, detecting whether the noise value is larger than a preset decibel value according to the noise value;
step S202-2, if the noise value is larger than the preset decibel value, detecting whether the current gear of the blower is larger than the preset gear;
and step 203-2, outputting a prompt for reducing the current blower gear if the current blower gear is greater than the preset gear.
In this embodiment, a user may set a maximum safe db value that can be borne on the vehicle in advance according to the hearing situation of his ear, compare the noise value in the vehicle with the maximum safe db value, and once the noise value in the vehicle exceeds the maximum safe db value, it is determined that the current noise value will damage the human ear, and then the noise value in the vehicle needs to be reduced; according to the corresponding relation between the gear of the blower in the vehicle and the noise value, the higher the gear of the blower is, the larger the noise value is; if the current gear of the blower exceeds the preset gear, the ears of the user feel uncomfortable, and a driver needs to be prompted to reduce the current gear of the blower through a voice or information screen. For example, the user feels uncomfortable when the noise reaches 60 db according to the hearing condition of the user, and the 60 db can be used as the maximum safe db value in the vehicle, and once the noise value in the vehicle is greater than 60 db during running of the vehicle, the user needs to find the reason for increasing the noise value and prompt the driver to reduce the noise value. Summarizing a plurality of groups of test data to obtain the corresponding relation between the gear of the vehicle blower and the noise value, wherein the corresponding relation is shown in the following table:
| blower gear | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Noise value | 37 | 40 | 43 | 47 | 51 | 55 | 59 | 64 |
The blower of a general vehicle has 8 gears, a blower gear value is preset according to the corresponding relation between the blower gear and the noise value in the vehicle, and once the current blower gear exceeds 6 gears, uncomfortable feeling is easily generated to human ears, noise shielding effect is also generated to other important voice information (such as human voice, host voice and the like) in the vehicle, so that a driver is required to be prompted to reduce the current blower gear to a proper gear through a voice or information screen. It should be noted that the numerical values and table data, such as "8 gears", "60 db", and "6 gears" listed in the present embodiment are only for illustrating the content of the present embodiment, and are not specific limiting values.
Further, in one embodiment, step S20-2 further comprises:
detecting whether the noise value is larger than a preset decibel value or not according to the noise value;
if the noise value is larger than the preset decibel value, detecting whether the current driving mode is an energy-saving mode or not;
and if the current driving mode is not the energy-saving mode, outputting a prompt for adjusting the vehicle to enter the energy-saving mode.
In this embodiment, a user may set a maximum safe db value that can be borne on the vehicle in advance according to the hearing situation of his ear, compare the noise value in the vehicle with the maximum safe db value, and once the noise value in the vehicle exceeds the maximum safe db value, it is determined that the current noise value will damage the human ear, and then the noise value in the vehicle needs to be reduced; the current driving mode can be selected and regulated to enable the vehicle body to be more stable, so that the noise value in the vehicle is reduced, the current driving mode is detected to be not an energy-saving mode, and if the current driving mode is in other driving modes, a driver is required to be prompted to regulate the vehicle to enter the energy-saving mode through a voice or information screen. For example, a user feels uncomfortable when the noise reaches 60 db according to the hearing condition of the user, and the 60 db can be used as the maximum safe db value in the vehicle, and once the noise value in the vehicle is greater than 60 db during the running process of the vehicle, the user needs to find the reason for increasing the noise value and prompt the driver to reduce the noise value; when the vehicle runs on the road surface, the current driving mode can directly influence the vibration of the vehicle body, if the current driving mode is in a normal mode or a motion mode, the vibration of the vehicle body is strong, meanwhile, the noise value in the vehicle can be increased, and a driver is required to be prompted to adjust the vehicle to enter an energy-saving mode through a voice or an information screen. It should be noted that, the numerical values listed in this embodiment, such as "60 db", are only used to illustrate the content of this embodiment, and are not specific limiting values.
Further, in one embodiment, step S20-2 further comprises:
detecting whether the noise value is larger than a preset decibel value or not according to the noise value;
if the noise value is larger than the preset decibel value, detecting whether the current engine speed is larger than the preset engine speed or not;
and if the current engine speed is greater than the preset engine speed, outputting a prompt for reducing the current engine speed.
In this embodiment, a user may set a maximum safe db value that can be borne on the vehicle in advance according to the hearing situation of his ear, compare the noise value in the vehicle with the maximum safe db value, and once the noise value in the vehicle exceeds the maximum safe db value, it is determined that the current noise value will damage the human ear, and then the noise value in the vehicle needs to be reduced; the maximum rotation speed value is preset for the engine, if the rotation speed of the engine exceeds the maximum rotation speed value, the engine causes great noise in the vehicle, and a voice or information screen is needed to prompt a driver to reduce the rotation speed of the engine. For example, a user feels uncomfortable when the noise reaches 60 db according to the hearing condition of the user, and the 60 db can be used as the maximum safe db value in the vehicle, and once the noise value in the vehicle is greater than 60 db during the running process of the vehicle, the user needs to find the reason for increasing the noise value and prompt the driver to reduce the noise value; if the preset engine speed is 2000 revolutions, the engine speed exceeds 2000 revolutions, the engine vibration becomes larger, and the noise value in the vehicle is increased, and the driver needs to be prompted to reduce the engine speed through a voice or information screen. It should be noted that the values listed in this embodiment, such as "60 db" and "2000 rpm", are only for illustrating the content of this embodiment, and are not specific limiting values.
Further, in an embodiment, referring to fig. 4, fig. 4 is a schematic diagram of a prompt interface of an in-vehicle noise control method according to an embodiment of the present invention. As shown in fig. 4, the in-vehicle noise control method further includes:
and determining the noise level according to the noise value, and outputting a prompt of the noise level.
In this embodiment, the noise in the vehicle is classified according to the ear condition of the human body in advance, and each class corresponds to a noise value range. According to the noise value in the vehicle, the noise level in the vehicle can be correspondingly obtained, and a prompt of the noise level is output. For example, referring to fig. 5, the prompt interface is composed of three parts, the middle part is displayed as the noise value in the vehicle, and the noise value is displayed in real time in two forms of a numerical value and an instrument pointer; the left part is set to be quiet, loud, noisy and slightly polluted according to the size of the noise database in the vehicle (it is to be noted that the noise level is not limited to only five noise levels, and is only illustrated as an example here), wherein when the noise level is quiet, the corresponding noise value range is below 40 db; when the noise level is loud, the corresponding noise value range is 41-50 dB; when the noise level is noisy, the corresponding noise value range is 51-63 dB; when the noise level is noisy, the corresponding noise value range is 64-74 dB; when the noise level is slightly polluted, the corresponding noise value range is more than 75 dB; the driver can be intuitively informed. The right part can display the frequency distribution of noise in the vehicle in real time through a frequency histogram, wherein the low frequency corresponding range is 40-80HZ, the middle and low frequency corresponding range is 80-160HZ, the middle frequency corresponding range is 160-1280HZ, the middle and high frequency corresponding range is 1280-2560HZ, the high frequency corresponding range is 2560-5120HZ and the ultrahigh frequency corresponding range is 5120-20000HZ. It should be noted that the values listed in this embodiment, such as "below 40 db", "41-50 db", "51-63 db", "64-74 db", "above 75 db", "40-80HZ", "80-160HZ", "160-1280HZ", "1280-2560HZ", "2560-5120HZ" and "5120-20000HZ", are only for illustrating the content of this embodiment, and are not specific limitations.
In this embodiment, when a time domain signal collected by an in-vehicle microphone is not interfered by a speaker, fourier transforming the time domain signal collected by the in-vehicle microphone to obtain a frequency domain signal, and determining a frequency domain signal of in-vehicle background noise; superposing the frequency domain signal of the background noise in the vehicle and the frequency domain signal of the host voice, carrying out weighting treatment on the frequency domain signal obtained by superposition and energy superposition on the same frequency, and generating a frequency domain signal of the synthesized voice; and carrying out inverse Fourier transform on the frequency domain signal of the synthesized voice to obtain a time domain signal, and generating and outputting an acoustic wave signal of the synthesized voice through a loudspeaker by the time domain signal of the synthesized voice. According to the method, when the distance between the microphone in the vehicle and the loudspeaker is too far, the loudspeaker is not started or the audio frequency emitted by the loudspeaker is too small, the time domain signal collected by the microphone in the vehicle is considered to be free from interference of the loudspeaker, and the time domain signal collected by the microphone in the vehicle is subjected to Fourier transformation to obtain a frequency domain signal, so that the frequency domain signal is determined to be the frequency domain signal of the background noise in the vehicle; the method comprises the steps of superposing a frequency domain signal of background noise in a vehicle and a frequency domain signal of host voice, attenuating and superposing a high frequency band or a low frequency band insensitive to human ears in the frequency domain signal, accumulating and strengthening energy on the same frequency in the frequency domain signal obtained by superposition to finally obtain a frequency domain signal of synthesized voice, obtaining a time domain signal of the synthesized voice through inverse Fourier transform, and generating a sound wave signal of the synthesized voice by a loudspeaker to play the time domain signal of the synthesized voice. Therefore, passengers in the automobile can hear important information such as Bluetooth voice, prompt tone, media voice and the like more clearly.
In a second aspect, the embodiment of the invention further provides an in-vehicle noise control device.
In an embodiment, referring to fig. 5, fig. 5 is a schematic functional block diagram of an in-vehicle noise control device according to an embodiment of the present invention. As shown in fig. 5, the in-vehicle noise control apparatus includes:
the first determining module 10 is configured to perform fourier transform on a time domain signal acquired by an in-vehicle microphone to obtain a frequency domain signal when the time domain signal acquired by the in-vehicle microphone is not interfered by a speaker, and determine a frequency domain signal of in-vehicle background noise;
the first generating module 20 is configured to superimpose the frequency domain signal of the background noise in the vehicle and the frequency domain signal of the host voice, perform weighting processing on the superimposed frequency domain signal and superimpose energy on the same frequency, and generate a frequency domain signal of the synthesized voice;
the second generating module 30 is configured to perform inverse fourier transform on the frequency domain signal of the synthesized voice to obtain a time domain signal, and generate and output an acoustic wave signal of the synthesized voice through a speaker.
Further, in an embodiment, the in-vehicle noise control device includes: the first generation module 20 is specifically configured to:
the weighting process is an A weighting process.
Further, in an embodiment, the in-vehicle noise control device further includes:
the second determining module is used for determining the noise value in the vehicle according to the sound pressure signal of the microphone in the vehicle;
and the prompt module is used for outputting and controlling the prompt of the vehicle according to the noise value.
Further, in an embodiment, the in-vehicle noise control device includes: the prompt module is specifically used for:
detecting whether the noise value is larger than a preset decibel value or not according to the noise value;
if the noise value is larger than the preset decibel value, detecting whether the current gear of the blower is larger than a preset gear or not;
and if the current blower gear is larger than the preset gear, outputting a prompt for reducing the current blower gear.
Further, in an embodiment, the in-vehicle noise control device includes: the prompt module is specifically further used for:
detecting whether the noise value is larger than a preset decibel value or not according to the noise value;
if the noise value is larger than the preset decibel value, detecting whether the current driving mode is an energy-saving mode or not;
and if the current driving mode is not the energy-saving mode, outputting a prompt for adjusting the vehicle to enter the energy-saving mode.
Further, in an embodiment, the in-vehicle noise control device includes: the prompt module is specifically further used for:
detecting whether the noise value is larger than a preset decibel value or not according to the noise value;
if the noise value is larger than the preset decibel value, detecting whether the current engine speed is larger than the preset engine speed or not;
and if the current engine speed is greater than the preset engine speed, outputting a prompt for reducing the current engine speed.
In one embodiment, the in-vehicle noise control device further includes:
and the third determining module is used for determining the noise level in the vehicle according to the noise value and outputting a prompt of the noise level.
The function implementation of each module in the in-vehicle noise control device corresponds to each step in the in-vehicle noise control method embodiment, and the function and implementation process of each module are not described here again.
In a third aspect, an embodiment of the present invention provides an in-vehicle noise control apparatus, which may be an apparatus having a data processing function such as a personal computer (personal computer, PC), a notebook computer, a server, or the like.
Referring to fig. 6, fig. 6 is a schematic hardware configuration diagram of an in-vehicle noise control apparatus according to an embodiment of the present invention. In an embodiment of the present invention, the in-vehicle noise control apparatus may include a processor 1001 (e.g., a central processing unit Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein the communication bus 1002 is used to enable connected communications between these components; the user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., WIreless-FIdelity, WI-FI interface); the memory 1005 may be a high-speed random access memory (random access memory, RAM) or a stable memory (non-volatile memory), such as a disk memory, and the memory 1005 may alternatively be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration shown in fig. 6 is not limiting of the invention and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
With continued reference to fig. 6, an operating system, a network communication module, a user interface module, and an in-vehicle noise control program may be included in the memory 1005 of fig. 6, which is a type of computer storage medium. The processor 1001 may call an in-vehicle noise control program stored in the memory 1005, and execute the in-vehicle noise control method provided by the embodiment of the present invention.
In a fourth aspect, embodiments of the present invention also provide a readable storage medium.
The in-vehicle noise control program is stored on the readable storage medium, and when the in-vehicle noise control program is executed by the processor, the steps of the in-vehicle noise control method are realized.
The method implemented when the in-vehicle noise control program is executed may refer to various embodiments of the in-vehicle noise control method of the present invention, and will not be described herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising several instructions for causing a terminal device to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. An in-vehicle noise control method, characterized by comprising:
when a time domain signal acquired by an in-car microphone is not interfered by a loudspeaker, carrying out Fourier transform on the time domain signal acquired by the in-car microphone to obtain a frequency domain signal, and determining a frequency domain signal of in-car background noise;
superposing the frequency domain signal of the background noise in the vehicle and the frequency domain signal of the host voice, carrying out weighting treatment on the frequency domain signal obtained by superposition and energy superposition on the same frequency, and generating a frequency domain signal of the synthesized voice;
and carrying out inverse Fourier transform on the frequency domain signal of the synthesized voice to obtain a time domain signal, and generating and outputting an acoustic wave signal of the synthesized voice through a loudspeaker by the time domain signal of the synthesized voice.
2. The in-vehicle noise control method according to claim 1, wherein the weighting process is an a weighting process.
3. The in-vehicle noise control method according to claim 1, characterized in that the in-vehicle noise control method further comprises:
determining a noise value in the vehicle according to the sound pressure signal of the microphone in the vehicle;
and outputting a prompt for controlling the vehicle according to the noise value.
4. The in-vehicle noise control method according to claim 3, wherein the step of outputting a prompt for controlling the vehicle based on the noise value includes:
detecting whether the noise value is larger than a preset decibel value or not according to the noise value;
if the noise value is larger than the preset decibel value, detecting whether the current gear of the blower is larger than a preset gear or not;
and if the current blower gear is larger than the preset gear, outputting a prompt for reducing the current blower gear.
5. The in-vehicle noise control method according to claim 3, wherein the step of outputting a prompt for controlling the vehicle according to the noise value further comprises:
detecting whether the noise value is larger than a preset decibel value or not according to the noise value;
if the noise value is larger than the preset decibel value, detecting whether the current driving mode is an energy-saving mode or not;
and if the current driving mode is not the energy-saving mode, outputting a prompt for adjusting the vehicle to enter the energy-saving mode.
6. The in-vehicle noise control method according to claim 3, wherein the step of outputting a prompt for controlling the vehicle according to the noise value further comprises:
detecting whether the noise value is larger than a preset decibel value or not according to the noise value;
if the noise value is larger than the preset decibel value, detecting whether the current engine speed is larger than the preset engine speed or not;
and if the current engine speed is greater than the preset engine speed, outputting a prompt for reducing the current engine speed.
7. The in-vehicle noise control method according to any one of claims 3 to 6, characterized in that the in-vehicle noise control method further comprises:
and determining the noise level according to the noise value, and outputting a prompt of the noise level.
8. An in-vehicle noise control apparatus, characterized by comprising:
the first determining module is used for carrying out Fourier transform on the time domain signals collected by the in-car microphone to obtain frequency domain signals when the time domain signals collected by the in-car microphone are not interfered by the loudspeaker, and determining the frequency domain signals of the in-car background noise;
the first generation module is used for superposing the frequency domain signal of the in-car background noise and the frequency domain signal of the host voice, carrying out weighting processing on the frequency domain signal obtained by superposition and superposing the energy on the same frequency, and generating the frequency domain signal of the synthesized voice;
and the second generation module is used for carrying out inverse Fourier transform on the frequency domain signal of the synthesized voice to obtain a time domain signal, and generating and outputting the sound wave signal of the synthesized voice through a loudspeaker.
9. An in-vehicle noise control apparatus, characterized in that the in-vehicle noise control apparatus includes a processor, a memory, and an in-vehicle noise control program stored on the memory and executable by the processor, wherein the in-vehicle noise control program, when executed by the processor, implements the steps of the in-vehicle noise control method according to any one of claims 1 to 7.
10. A readable storage medium, wherein an in-vehicle noise control program is stored on the readable storage medium, wherein the in-vehicle noise control program, when executed by a processor, implements the steps of the in-vehicle noise control method according to any one of claims 1 to 7.
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