CN113470632A - Audio processing method and system for reducing resonance of door metal plate and loudspeaker - Google Patents
Audio processing method and system for reducing resonance of door metal plate and loudspeaker Download PDFInfo
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/20—Speech recognition techniques specially adapted for robustness in adverse environments, e.g. in noise, of stress induced speech
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/22—Procedures used during a speech recognition process, e.g. man-machine dialogue
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L15/00—Speech recognition
- G10L15/28—Constructional details of speech recognition systems
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
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Abstract
The invention provides an audio processing method and system for reducing resonance of a door metal plate and a loudspeaker, wherein the method comprises the following steps: determining the resonant frequency range of a door metal plate and a loudspeaker in the current vehicle; detecting a maximum fixed resonance frequency point of the door metal plate and the loudspeaker according to the maximum resonance intensity in the resonance frequency range; the audio output gain in the range around the maximum fixed resonance frequency point is reduced by the DSP to reduce the output power in the range around the maximum fixed resonance frequency point. The method can reduce the resonance intensity of the loudspeaker and the door metal plate in the range of the front and the back of the maximum fixed resonance frequency point, further greatly reduce the distortion intensity of the loudspeaker, improve the recognition rate of a voice system and correspondingly improve the use experience of a user.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to an audio processing method and system for reducing resonance of a door metal plate and a loudspeaker.
Background
With the rapid development of the car networking technology, the intelligent cabin is one of the most widely applied directions of the current car networking, and the voice interaction function is one of the key functions of the intelligent cabin.
One of the evaluation criteria for judging whether the voice interaction experience is excellent in the prior art is the voice recognition rate. The voice recognition rate depends on an in-vehicle microphone to collect a sound source in the vehicle, the background noise is eliminated, a voice part is left for being analyzed and processed by a voice system, and the voice recognition rate is judged according to the false recognition and the missing recognition recognized by the voice system.
However, the scenes experienced by the automobile in the using process are complex and various, so that the factors influencing the voice background noise are more, in some scenes, when the loudspeaker outputs audio, the audio can resonate with a door metal plate on the automobile body to cause loudspeaker distortion, the noise reduction processing effect of a voice system is poor in a specific scene, the voice recognition rate is reduced, and the using experience of a user is reduced.
Disclosure of Invention
Based on the above, the invention aims to provide an audio processing method and system for reducing resonance between a door metal plate and a loudspeaker, so as to solve the problem that in the prior art, the loudspeaker and the door metal plate generate resonance and loudspeaker distortion is caused, so that the voice recognition rate is low in a specific scene.
An audio processing method of mitigating door panel beating from resonance with a speaker, the method comprising:
determining the resonant frequency range of a door metal plate and a loudspeaker in the current vehicle;
detecting a maximum fixed resonance frequency point of the door metal plate and the loudspeaker according to the maximum resonance intensity in the resonance frequency range;
and reducing the audio output gain in the range around the maximum fixed resonance frequency point through the DSP so as to reduce the output power in the range around the maximum fixed resonance frequency point.
The invention has the beneficial effects that: the method comprises the steps of determining the resonance frequency range of a door metal plate and a loudspeaker in a current vehicle, detecting the maximum fixed resonance frequency point of the door metal plate and the loudspeaker according to the resonance frequency range to determine the maximum resonance frequency point to be processed, and finally reducing audio output gain in the front and back ranges of the maximum fixed resonance frequency point through a DSP (digital signal processor) to reduce output power in the front and back ranges of the maximum fixed resonance frequency point, so that the resonance intensity of the door metal plate and the loudspeaker in the front and back ranges of the maximum fixed resonance frequency point can be reduced, the distortion degree of the loudspeaker can be greatly reduced, the noise reduction processing effect of a voice system is correspondingly improved, the recognition rate of voice is improved, and the use experience of a user is also improved.
Preferably, the step of determining the resonant frequency range of the door metal plate and the loudspeaker in the current vehicle includes:
determining the current model of the vehicle to obtain a first model of the door sheet metal and a second model of the loudspeaker;
respectively acquiring a first vibration frequency range corresponding to the door metal plate and a second vibration frequency range corresponding to the loudspeaker according to the first model and the second model;
and determining the resonance frequency range of the door metal plate and the loudspeaker according to the first vibration frequency range and the second vibration frequency range.
Preferably, the step of determining the resonant frequency range of the door metal plate and the speaker according to the first vibration frequency range and the second vibration frequency range includes:
when the door metal plate and the loudspeaker are arranged in the same sound insulation chamber, the loudspeaker is controlled to work in the second vibration frequency range;
collecting the initial frequency and the final frequency of the resonance generated between the door metal plate and the loudspeaker in the first vibration frequency range;
and determining the resonant frequency range of the door metal plate and the loudspeaker according to the starting frequency and the ending frequency.
Preferably, the step of detecting the maximum fixed resonance frequency range of the door metal plate and the speaker according to the resonance frequency range includes:
detecting the resonance intensity corresponding to each resonance frequency in the resonance frequency range one by one;
and determining the maximum fixed resonance frequency point of the door metal plate and the loudspeaker by comparing the resonance intensity corresponding to each resonance frequency.
Preferably, the step of reducing the audio output gain of the maximum fixed resonance frequency range by the DSP to reduce the output power of the maximum fixed resonance frequency range includes:
when the DSP receives audio output gains in the front and rear ranges of the maximum fixed resonance frequency point, obtaining spectrograms in the front and rear ranges of the maximum fixed resonance frequency point;
reducing peaks in the spectrogram by a filter in the DSP to reduce audio output gain and output power in a range around the maximum fixed resonance frequency point.
Another objective of the present invention is to provide an audio processing system for mitigating resonance between a door metal plate and a speaker, the system comprising:
the first detection module is used for determining the resonant frequency range of a door metal plate and a loudspeaker in the current vehicle;
the second detection module is used for detecting the maximum fixed resonance frequency range of the door metal plate and the loudspeaker according to the resonance frequency range;
and the signal processing module is used for reducing the audio output gain of the maximum fixed resonance frequency range through the DSP so as to reduce the output power of the maximum fixed resonance frequency range.
The first detection module in the audio processing system for reducing the resonance of the door sheet metal and the loudspeaker is specifically used for:
determining the current model of the vehicle to obtain a first model of the door sheet metal and a second model of the loudspeaker;
respectively acquiring a first vibration frequency range corresponding to the door metal plate and a second vibration frequency range corresponding to the loudspeaker according to the first model and the second model;
and determining the resonance frequency range of the door metal plate and the loudspeaker according to the first vibration frequency range and the second vibration frequency range.
The first detection module in the audio processing system for reducing the resonance of the door sheet metal and the loudspeaker is specifically used for:
when the door metal plate and the loudspeaker are arranged in the same sound insulation chamber, the loudspeaker is controlled to work in the second vibration frequency range;
collecting the initial frequency and the final frequency of the resonance generated between the door metal plate and the loudspeaker in the first vibration frequency range;
and determining the resonant frequency range of the door metal plate and the loudspeaker according to the starting frequency and the ending frequency.
The second detection module in the audio processing system for reducing the resonance of the door sheet metal and the loudspeaker is specifically used for:
detecting the resonance intensity corresponding to each resonance frequency in the resonance frequency range one by one;
and determining the maximum fixed resonance frequency point of the door metal plate and the loudspeaker by comparing the resonance intensity corresponding to each resonance frequency.
The signal processing module in the audio processing system for reducing the resonance of the door metal plate and the loudspeaker is specifically used for:
when the DSP receives audio output gains in the front and rear ranges of the maximum fixed resonance frequency point, obtaining spectrograms in the front and rear ranges of the maximum fixed resonance frequency point;
reducing peaks in the spectrogram by a filter in the DSP to reduce audio output gain and output power in a range around the maximum fixed resonance frequency point.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a flowchart of an audio processing method for reducing resonance between a door metal plate and a speaker according to a first embodiment of the present invention;
fig. 2 is a flowchart of an audio processing method for reducing resonance between a door metal plate and a speaker according to a second embodiment of the present invention;
fig. 3 is a block diagram of an audio processing system for mitigating resonance between a door metal plate and a speaker according to a third embodiment of the present invention.
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The door panel beating and the speaker on current car can produce certain resonance to can make the speaker distortion, this noise can influence the inside speech system of car discernment user's speech instruction, thereby has reduced speech system's speech recognition rate, has reduced user's use and has experienced.
Referring to fig. 1, an audio processing method for reducing resonance between a door metal plate and a speaker according to a first embodiment of the present invention is mainly applied between a door metal plate and a speaker on an automobile to reduce resonance energy generated between the door metal plate and the speaker, avoid distortion of the speaker, and improve recognition rate of a voice system.
Wherein: the audio processing method for reducing the resonance of the door metal plate and the loudspeaker specifically comprises the following steps:
step S10, determining the resonance frequency range of the door metal plate and the loudspeaker in the current vehicle;
specifically, in this embodiment, it can be understood that, at the in-process of car work, the door panel beating can produce the vibration at certain frequency range, and in the same way, the speaker also can produce the vibration at certain frequency range at the in-process of work, consequently, can place the current vehicle in the soundproof room, starts the current vehicle and sets up vibration sensor on door panel beating and speaker, wherein, the vibration frequency range of coincidence between door panel beating and the speaker is the resonant frequency range between them promptly.
Step S20, detecting the maximum fixed resonance frequency point of the door metal plate and the loudspeaker according to the maximum resonance intensity in the resonance frequency range;
specifically, in this embodiment, when the resonance frequency range between the door metal plate and the speaker is obtained, each resonance frequency in the resonance frequency range is detected, and the resonance intensity corresponding to each resonance frequency is obtained correspondingly, and the maximum fixed resonance frequency point between the door metal plate and the speaker can be obtained by comparing the resonance intensities corresponding to each resonance frequency.
Step S30, reducing audio output gain in the range around the maximum fixed resonance frequency point by the DSP to reduce output power in the range around the maximum fixed resonance frequency point;
specifically, in this embodiment, as can be understood by those skilled in the art, a DSP (digital signal processing module) is usually pre-installed in an existing automobile inside an automobile body, and when a maximum fixed resonance frequency point is obtained, audio output gain in a range before and after the maximum fixed resonance frequency point is reduced through the DSP according to a rule for reducing output gain preset in DSP software.
In this embodiment, it can be understood that, when the user plays the audio, and the frequency of the audio reaches the front and back ranges of the maximum fixed resonance frequency point, the DSP can automatically reduce the output gain of the audio, so as to reduce the resonance intensity in the front and back ranges of the maximum fixed resonance frequency point, thereby reducing the influence of the resonance frequency on the speaker, avoiding the distortion of the speaker, improving the recognition rate of the voice system, and improving the user experience.
When the method is used, the resonance frequency range of a door metal plate and a loudspeaker in the current vehicle is determined, the maximum fixed resonance frequency point of the door metal plate and the loudspeaker is detected according to the resonance frequency range to determine the maximum resonance frequency point to be processed, finally, the audio output gain in the front and rear ranges of the maximum fixed resonance frequency point is reduced through the DSP to reduce the output power in the front and rear ranges of the maximum fixed resonance frequency point, so that the resonance intensity of the loudspeaker and the door metal plate in the front and rear ranges of the maximum fixed resonance frequency point can be reduced, the distortion degree of the loudspeaker can be greatly reduced, the noise reduction processing effect of a voice system is correspondingly improved, the recognition rate of voice is improved, and the use experience of a user is also improved.
It should be noted that the above implementation procedure is only for illustrating the applicability of the present application, but this does not represent that the audio processing method for mitigating resonance between a door metal plate and a speaker of the present application is only one implementation procedure, and on the contrary, the audio processing method for mitigating resonance between a door metal plate and a speaker of the present application can be incorporated into the feasible embodiments of the present application as long as it can be implemented.
In summary, the audio processing method for reducing the resonance between the door metal plate and the speaker in the embodiments of the present invention can reduce the resonance intensity of the speaker and the door metal plate in the range before and after the maximum fixed resonance frequency point, thereby greatly reducing the distortion degree of the speaker, correspondingly improving the noise reduction processing effect of the voice system, improving the recognition rate of the voice, and also improving the user experience.
Referring to fig. 2, an audio processing method for reducing resonance between a door metal plate and a speaker according to a second embodiment of the present invention is shown, which includes the following steps:
step S11, determining the current model of the vehicle to obtain a first model of the door sheet metal and a second model of the loudspeaker; respectively acquiring a first vibration frequency range corresponding to the door metal plate and a second vibration frequency range corresponding to the loudspeaker according to the first model and the second model; and determining the resonance frequency range of the door metal plate and the loudspeaker according to the first vibration frequency range and the second vibration frequency range.
In this embodiment, as can be understood by those skilled in the art, the types and the varieties of the existing automobiles are various, and therefore, in the production and manufacturing process of the automobiles, there is a certain difference between the types of the door metal plates and the speakers used by the existing automobiles, and therefore, in this embodiment, the type of the current vehicle needs to be determined first, and then the first type of the door metal plate and the second type of the speakers used on the body of the current vehicle need to be determined according to the current vehicle.
When the first model and the second model are obtained, a first vibration frequency range of the door metal plate and a second vibration frequency range of the loudspeaker are respectively and correspondingly detected according to the first model and the second signal, and then the resonance frequency range of the door metal plate and the loudspeaker is determined according to the first vibration frequency range and the second vibration frequency range.
The step of determining the resonance frequency range of the door sheet metal and the loudspeaker according to the first vibration frequency range and the second vibration frequency range comprises:
step S21, when the door metal plate and the loudspeaker are arranged in the same sound insulation chamber, controlling the loudspeaker to work in the second vibration frequency range; collecting the initial frequency and the final frequency of the resonance generated between the door metal plate and the loudspeaker in the first vibration frequency range; and determining the resonant frequency range of the door metal plate and the loudspeaker according to the starting frequency and the ending frequency.
In this embodiment, for convenience of implementation, a current vehicle is placed in a sound insulation chamber, it can be understood that a door metal plate and a speaker are placed in the same sound insulation chamber, and meanwhile, vibration sensors are respectively mounted on the door metal plate and the speaker and connected to a computer.
Step S31, detecting the resonance intensity corresponding to each resonance frequency within the resonance frequency range one by one; and determining the maximum fixed resonance frequency point of the door metal plate and the loudspeaker by comparing the resonance intensity corresponding to each resonance frequency.
Specifically, in this embodiment, when the computer acquires the resonance frequency range, the computer can immediately perform analysis processing, detect the resonance intensity corresponding to each resonance frequency in the resonance frequency range one by one, and determine the maximum fixed resonance frequency point of the door metal plate and the speaker by comparing the resonance intensity corresponding to each resonance frequency.
Step S41, when the DSP receives the audio output gain in the range around the maximum fixed resonance frequency point, acquiring a spectrogram in the range around the maximum fixed resonance frequency point; reducing peaks in the spectrogram by a filter in the DSP to reduce audio output gain and output power in a range around the maximum fixed resonance frequency point.
In this embodiment, the DSP can immediately receive the maximum fixed resonance frequency point, acquire a spectrogram in a range around the maximum fixed resonance frequency point, and reduce a peak value in the spectrogram through a filter in the DSP, so as to reduce audio output gain in the range around the maximum fixed resonance frequency point and reduce output power in the range around the maximum fixed resonance frequency point, thereby avoiding distortion of the speaker, where the filter is a band pass filter capable of attenuating audio output gain in a certain frequency range to a lower level.
Specifically, in this embodiment, for example, when the maximum fixed resonance frequency point of the door panel beating and the speaker in a certain vehicle type is 266Hz, the filter in the DSP can reduce the audio output gain within the front-back range of the maximum fixed resonance frequency point by 6db, thereby greatly reducing the peak value in the spectrogram within the front-back range of the maximum fixed resonance frequency point, further reducing the audio output gain within the front-back range of the maximum fixed resonance frequency point, correspondingly reducing the output power within the front-back range of the maximum fixed resonance frequency point, avoiding the occurrence of distortion of the speaker, improving the voice recognition rate of the voice system, and correspondingly improving the user experience.
It should be noted that, the method provided by the second embodiment of the present invention, which implements the same principle and produces some technical effects as the first embodiment, can refer to the corresponding contents in the first embodiment for the sake of brief description, where this embodiment is not mentioned.
In summary, the audio processing method for reducing the resonance between the door metal plate and the speaker in the embodiments of the present invention can reduce the resonance intensity of the speaker and the door metal plate in the range before and after the maximum fixed resonance frequency point, thereby greatly reducing the distortion degree of the speaker, correspondingly improving the noise reduction processing effect of the voice system, improving the recognition rate of the voice, and also improving the user experience.
Referring to fig. 3, an audio processing system for reducing resonance between a door metal plate and a speaker according to a third embodiment of the present invention is shown, the system specifically includes:
the first detection module 12 is used for determining a resonant frequency range of a door metal plate and a loudspeaker in the current vehicle;
the second detection module 22 is configured to detect a maximum fixed resonance frequency point of the door metal plate and the speaker according to a maximum resonance intensity within the resonance frequency range;
and the signal processing module 32 is configured to reduce, by the DSP, audio output gains in the ranges before and after the maximum fixed resonance frequency point, so as to reduce output powers in the ranges before and after the maximum fixed resonance frequency point.
Wherein, the first detection module is specifically configured to:
determining the current model of the vehicle to obtain a first model of the door sheet metal and a second model of the loudspeaker;
respectively acquiring a first vibration frequency range corresponding to the door metal plate and a second vibration frequency range corresponding to the loudspeaker according to the first model and the second model;
and determining the resonance frequency range of the door metal plate and the loudspeaker according to the first vibration frequency range and the second vibration frequency range.
Wherein, the first detection module is specifically configured to:
when the door metal plate and the loudspeaker are arranged in the same sound insulation chamber, the loudspeaker is controlled to work in the second vibration frequency range;
collecting the initial frequency and the final frequency of the resonance generated between the door metal plate and the loudspeaker in the first vibration frequency range;
and determining the resonant frequency range of the door metal plate and the loudspeaker according to the starting frequency and the ending frequency.
The second detection module is specifically configured to:
detecting the resonance intensity corresponding to each resonance frequency in the resonance frequency range one by one; and determining the maximum fixed resonance frequency point of the door metal plate and the loudspeaker by comparing the resonance intensity corresponding to each resonance frequency.
Wherein the signal processing module is specifically configured to:
when the DSP receives audio output gains in the front and rear ranges of the maximum fixed resonance frequency point, obtaining spectrograms in the front and rear ranges of the maximum fixed resonance frequency point; reducing peaks in the spectrogram by a filter in the DSP to reduce audio output gain and output power in a range around the maximum fixed resonance frequency point.
In summary, the audio processing method and system for reducing the resonance between the door metal plate and the speaker in the embodiments of the present invention can reduce the resonance intensity of the speaker and the door metal plate in the range before and after the maximum fixed resonance frequency point, thereby greatly reducing the distortion degree of the speaker, correspondingly improving the noise reduction effect of the voice system, improving the recognition rate of the voice, and improving the user experience.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An audio processing method for reducing resonance between a door metal plate and a loudspeaker is characterized by comprising the following steps:
determining the resonant frequency range of a door metal plate and a loudspeaker in the current vehicle;
detecting a maximum fixed resonance frequency point of the door metal plate and the loudspeaker according to the maximum resonance intensity in the resonance frequency range;
and reducing the audio output gain in the range around the maximum fixed resonance frequency point through the DSP so as to reduce the output power in the range around the maximum fixed resonance frequency point.
2. The audio processing method for reducing resonance of a door sheet metal and a loudspeaker according to claim 1, wherein: the step of determining the resonant frequency range of the door metal plate and the loudspeaker in the current vehicle comprises the following steps:
determining the current model of the vehicle to obtain a first model of the door sheet metal and a second model of the loudspeaker;
respectively acquiring a first vibration frequency range corresponding to the door metal plate and a second vibration frequency range corresponding to the loudspeaker according to the first model and the second model;
and determining the resonance frequency range of the door metal plate and the loudspeaker according to the first vibration frequency range and the second vibration frequency range.
3. The audio processing method for reducing resonance of a door sheet metal and a loudspeaker according to claim 2, wherein: the step of determining the resonance frequency range of the door sheet metal and the loudspeaker according to the first vibration frequency range and the second vibration frequency range comprises:
when the door metal plate and the loudspeaker are arranged in the same sound insulation chamber, the loudspeaker is controlled to work in the second vibration frequency range;
collecting the initial frequency and the final frequency of the resonance generated between the door metal plate and the loudspeaker in the first vibration frequency range;
and determining the resonant frequency range of the door metal plate and the loudspeaker according to the starting frequency and the ending frequency.
4. The audio processing method for reducing resonance of a door sheet metal and a loudspeaker according to claim 1, wherein: the step of detecting the maximum fixed resonance frequency point of the door metal plate and the loudspeaker according to the maximum resonance intensity in the resonance frequency range comprises the following steps:
detecting the resonance intensity corresponding to each resonance frequency in the resonance frequency range one by one;
and determining the maximum fixed resonance frequency point of the door metal plate and the loudspeaker by comparing the resonance intensity corresponding to each resonance frequency.
5. The audio processing method for reducing resonance of a door sheet metal and a loudspeaker according to claim 1, wherein: the step of reducing the audio output gain in the range around the maximum fixed resonance frequency point by the DSP to reduce the output power in the range around the maximum fixed resonance frequency point includes:
when the DSP receives audio output gains in the front and rear ranges of the maximum fixed resonance frequency point, obtaining spectrograms in the front and rear ranges of the maximum fixed resonance frequency point;
reducing peaks in the spectrogram by a filter in the DSP to reduce audio output gain and output power in a range around the maximum fixed resonance frequency point.
6. An audio processing system for mitigating resonance of a door panel and a speaker, the system comprising:
the first detection module is used for determining the resonant frequency range of a door metal plate and a loudspeaker in the current vehicle;
the second detection module is used for detecting a maximum fixed resonance frequency point of the door metal plate and the loudspeaker according to the maximum resonance intensity in the resonance frequency range;
and the signal processing module is used for reducing the audio output gain in the range before and after the maximum fixed resonance frequency point through the DSP so as to reduce the output power in the range before and after the maximum fixed resonance frequency point.
7. The audio processing system for mitigating resonance between a door metal plate and a speaker according to claim 6, wherein: the first detection module is specifically configured to:
determining the current model of the vehicle to obtain a first model of the door sheet metal and a second model of the loudspeaker;
respectively acquiring a first vibration frequency range corresponding to the door metal plate and a second vibration frequency range corresponding to the loudspeaker according to the first model and the second model;
and determining the resonance frequency range of the door metal plate and the loudspeaker according to the first vibration frequency range and the second vibration frequency range.
8. The audio processing system for mitigating resonance between a door metal plate and a speaker according to claim 7, wherein: the first detection module is specifically configured to:
when the door metal plate and the loudspeaker are arranged in the same sound insulation chamber, the loudspeaker is controlled to work in the second vibration frequency range;
collecting the initial frequency and the final frequency of the resonance generated between the door metal plate and the loudspeaker in the first vibration frequency range;
and determining the resonant frequency range of the door metal plate and the loudspeaker according to the starting frequency and the ending frequency.
9. The audio processing system for mitigating resonance between a door metal plate and a speaker according to claim 6, wherein: the second detection module is specifically configured to:
detecting the resonance intensity corresponding to each resonance frequency in the resonance frequency range one by one;
and determining the maximum fixed resonance frequency point of the door metal plate and the loudspeaker by comparing the resonance intensity corresponding to each resonance frequency.
10. The audio processing system for mitigating resonance between a door metal plate and a speaker according to claim 6, wherein: the signal processing module is specifically configured to:
when the DSP receives audio output gains in the front and rear ranges of the maximum fixed resonance frequency point, obtaining spectrograms in the front and rear ranges of the maximum fixed resonance frequency point;
reducing peaks in the spectrogram by a filter in the DSP to reduce audio output gain and output power in a range around the maximum fixed resonance frequency point.
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| CN115175031A (en) * | 2022-06-30 | 2022-10-11 | 中国第一汽车股份有限公司 | Vehicle door vibration frequency adjusting method and device, electronic equipment and storage medium |
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