In-vehicle active sound production control method and device matched with driving characteristics

Abstract

The invention discloses an in-vehicle active sound production control method and device matched with driving characteristics. The method comprises the steps that sound design attributes are selected based on acoustic perception preferences of vehicle consumer groups; establishing a corresponding relation between the sound amplitude and the vehicle driving characteristics; determining a plurality of basic order sounds for order matching according to the sound design attributes and the driving characteristics, and performing amplitude adjustment on the basic order sounds based on the vehicle running state parameters to obtain synthetic order sounds; and carrying out operation condition in-vehicle sound environment fusion and subjective and objective evaluation on the synthesized order sound, carrying out parameter correction on the synthesized order sound according to the in-vehicle sound environment fusion and subjective and objective evaluation results to obtain an in-vehicle active sound production audio file, and driving a vehicle loudspeaker to play the audio file. According to the invention, a scientific guidance basis is provided for improving the subjective hearing feeling of the in-vehicle design sound and reducing the non-natural feeling of manual design, and the driving experience and the in-vehicle sound quality are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle active sound control, and in particular to a method and device for in-vehicle active sound control that matches driving characteristics. Background Art

[0002] After years of development, the automotive industry is undergoing an unprecedented transformation. "Electrification, intelligence, connectivity, and sharing" have become the future trends of the automotive industry. Because in-car sound is highly perceptible to passengers and highly interactive, in-car sound design has garnered increasing attention amid the "New Four Modernizations" of automobiles. Active in-car sound technology not only highlights a vehicle's market positioning and brand heritage, but also engages passengers emotionally, significantly enhancing driving pleasure. It has become a new market explosion and growth point.

[0003] Active in-car sound design technology has made great progress, and products such as active sound generation have gained widespread market recognition. However, the artificially designed sounds emitted by in-car speakers have problems such as mismatching with the vehicle's driving characteristics. Passengers can easily hear a clear sense of separation between the designed sounds and the original vehicle's operating sounds, seriously affecting their subjective auditory perception and driving experience.

[0004] Therefore, there is an urgent need to propose an active in-vehicle sound control method and device that matches driving characteristics. This method can comprehensively consider the coupling relationship between sound design attributes and vehicle driving characteristics, match the sound field information in the vehicle under different driving conditions, enhance the subjective auditory perception of the designed sound in the vehicle, provide design guidance for reducing the unnatural feeling of artificial design, and improve the driving experience and in-vehicle sound quality. Summary of the Invention

[0005] In view of this, the present invention provides a method and device for controlling active in-vehicle sound that matches driving characteristics, so as to solve the technical problem that the active sound played by the existing in-vehicle active sound design method does not match the original vehicle operating conditions, which easily causes passengers to hear a sense of separation and distortion.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a method for active in-vehicle sound control that matches driving characteristics, comprising:

[0008] Select sound design attributes based on the acoustic perception preferences of vehicle consumer groups;

[0009] Establishing a corresponding relationship between sound amplitude and vehicle driving characteristics; the vehicle driving characteristics include acceleration and constant speed conditions, constant speed and deceleration conditions, and slow acceleration and fast acceleration conditions;

[0010] Determining a plurality of basic order sounds for order matching based on sound design attributes and driving characteristics, and adjusting the amplitudes of the basic order sounds based on vehicle operating state parameters to obtain synthesized order sounds;

[0011] The synthesized order sound is subjected to in-vehicle acoustic environment fusion and subjective and objective evaluation under operating conditions, and parameters of the synthesized order sound are modified based on the in-vehicle acoustic environment fusion and subjective and objective evaluation results to obtain an in-vehicle active sound audio file, and the vehicle speaker is driven to play the audio file.

[0012] Furthermore, when the vehicle driving characteristics are acceleration and constant speed conditions, the corresponding relationship between the sound amplitude and the vehicle driving characteristics is expressed by the formula:

[0013] d a =d c +α1·v+β1·(p a -p c )+σ1

[0014] Where v is the speed of the vehicle in any state, d a is the amplitude of the sound inside the car when the speed is v under acceleration conditions, d c is the amplitude of the sound inside the car when the speed is v under uniform speed conditions, p a is the opening of the accelerator pedal under acceleration conditions, p c is the opening of the accelerator pedal under uniform speed conditions, α1 is the weight coefficient of vehicle speed, β1 is the weight coefficient of the accelerator pedal opening, and σ1 is a constant coefficient term.

[0015] Furthermore, when the vehicle driving characteristics are constant speed and deceleration conditions, the corresponding relationship between the sound amplitude and the vehicle driving characteristics is expressed by the formula:

[0016] d c =d m +α2·v+β2·p c +σ2

[0017] Where v is the vehicle speed in any state, d c is the amplitude of the sound inside the car when the speed is v under uniform speed conditions, d m is the amplitude of the sound inside the car when the speed is v under deceleration conditions, p c is the opening of the accelerator pedal under uniform speed conditions, α2 is the weight coefficient of vehicle speed, β2 is the weight coefficient of the accelerator pedal opening, and σ2 is a constant coefficient term.

[0018] Furthermore, when the vehicle driving characteristics are slow acceleration and fast acceleration conditions, the corresponding relationship between the sound amplitude and the vehicle driving characteristics is expressed by the formula:

[0019] d h =d s+α3·v+β3·(p h -p s )+σ3

[0020] Where v is the vehicle speed in any state, d h is the amplitude of the sound inside the car when the speed is v under fast acceleration conditions, d s is the amplitude of the sound inside the car when the speed is v under slow acceleration conditions, p h is the opening of the accelerator pedal under fast acceleration conditions, p s is the opening of the accelerator pedal under slow acceleration conditions, α3 is the weight coefficient of vehicle speed, β3 is the weight coefficient of the accelerator pedal opening, and σ3 is a constant coefficient term.

[0021] Furthermore, the amplitude of the basic order sound is adjusted based on the vehicle operating state parameter to obtain a synthetic order sound, including:

[0022] Select m basic order sounds for order synthesis, and the synthesized order sound is expressed by the formula:

[0023]

[0024] Among them, S asd For the synthetic order sound, A i is the amplitude coefficient of any fundamental order sound, w i is the angular frequency, f i is the frequency, φ i The initial phase.

[0025] Furthermore, the amplitude of the fundamental order sound is adjusted based on the vehicle operating state parameter to obtain the synthesized order sound, further comprising:

[0026] The amplitude coefficient of any basic order is adjusted based on the vehicle's rotational speed, speed, acceleration, and throttle opening parameters, which can be expressed as follows:

[0027]

[0028] in, are the weight factors corresponding to the rotation speed, vehicle speed, acceleration and throttle opening of any order sound under the vehicle driving condition, are the amplitude factors of any order sound corresponding to the rotational speed, vehicle speed, acceleration and throttle opening under the vehicle driving condition.

[0029] Furthermore, the weight factors of any order sound corresponding to the rotational speed, vehicle speed, acceleration and throttle opening under the vehicle driving condition are determined by the driving characteristics; the weight factors of any order sound corresponding to the rotational speed, vehicle speed, acceleration and throttle opening under the vehicle driving condition are determined by the sound design attributes.

[0030] Furthermore, the synthesized order sound is fused with the vehicle interior sound environment under the operating condition, including:

[0031] Optimize the synthesized order sound based on the various types of acoustic products in the vehicle, the electroacoustic transmission characteristics of the vehicle playback system, the vehicle's internal cavity acoustic modes, and the vehicle's internal sound absorption and reflection factors;

[0032] The synthesized order sound is evaluated subjectively and objectively in the vehicle under operating conditions, including: evaluating the satisfaction level of the synthesized order sound.

[0033] In a second aspect, the present invention further provides an in-vehicle active sound control device adapted to driving characteristics, comprising:

[0034] A design attribute acquisition module is used to select sound design attributes based on the acoustic perception preferences of vehicle consumer groups;

[0035] A driving characteristics modeling module is used to establish a corresponding relationship between sound amplitude and vehicle driving characteristics; the vehicle driving characteristics include acceleration and constant speed conditions, constant speed and deceleration conditions, and slow acceleration and fast acceleration conditions;

[0036] a synthetic order sound generation module, configured to determine a plurality of basic order sounds for order matching based on sound design attributes and driving characteristics, and to adjust the amplitudes of the basic order sounds based on vehicle operating state parameters to obtain synthetic order sounds;

[0037] The active sound playback module is used to integrate the synthesized order sound with the in-vehicle sound environment under operating conditions and conduct subjective and objective evaluations, perform parameter corrections on the synthesized order sound based on the results of the in-vehicle sound environment integration and subjective and objective evaluations, obtain an in-vehicle active sound audio file, and drive the vehicle speakers to play the audio file.

[0038] In a third aspect, the present invention further provides a vehicle, comprising the in-vehicle active sound control device that matches driving characteristics as described in the above technical solution.

[0039] Compared with the existing technology, the method and device for active in-vehicle sound control that matches driving characteristics provided by the present invention have the following advantages:

[0040] (1) The present invention comprehensively considers the coupling relationship between sound design attributes and vehicle driving characteristics, and synthesizes sound based on the order of initial sound design attributes and driving characteristics design, which can meet the acoustic perception preferences of different consumers and make vehicle sound design more personalized.

[0041] (2) By reading the operating state parameters representing the vehicle driving characteristics from the CAN bus in real time for amplitude adjustment of the order synthesis sound, the preliminarily designed sound is integrated with the sound environment under the vehicle operating conditions, and the sound field information inside the vehicle under different driving conditions is designed to match the sound perfectly with the driving characteristics (such as acceleration, deceleration, etc.), avoiding the problem of inconsistency between the sound and the driving state.

[0042] (3) Through the integration of the in-vehicle sound environment under operating conditions and subjective and objective evaluation, the unique sound quality preferences and driving habits of the driving population are used as subjective and objective evaluation criteria to correct the design parameters of order ratio and amplitude adjustment, optimize the in-vehicle sound environment, and enable car owners and passengers to enjoy a better sound quality experience.

[0043] In summary, the present invention can provide a scientific design guidance basis for enhancing the subjective auditory experience of in-car design sound and reducing the unnatural feeling of artificial design, which can effectively improve the driving experience and in-car sound quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A schematic flow chart of the in-vehicle active sound control method matching driving characteristics provided by the present invention;

[0045] Figure 2 A schematic diagram of the driving characteristic path provided by the present invention;

[0046] Figure 3 A schematic diagram of the operating condition sound environment fusion and subjective and objective evaluation process provided by the present invention;

[0047] Figure 4 A schematic diagram of the process framework of the in-vehicle active sound design and development method that matches driving characteristics provided by the present invention;

[0048] Figure 5 This is a schematic diagram of the structure of the in-vehicle active sound control device that matches driving characteristics provided by the present invention. DETAILED DESCRIPTION

[0049] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0050] See Figure 1 This embodiment provides a method for active in-vehicle sound control that matches driving characteristics, including:

[0051] Step S101: selecting sound design attributes based on the acoustic perception preferences of vehicle consumer groups;

[0052] Step S102: establishing a correspondence between the sound amplitude and the vehicle driving characteristics; the vehicle driving characteristics include acceleration and constant speed conditions, constant speed and deceleration conditions, and slow acceleration and fast acceleration conditions;

[0053] Step S103: determining a plurality of basic order sounds for order matching based on the sound design attributes and driving characteristics, and adjusting the amplitudes of the basic order sounds based on the vehicle operating state parameters to obtain synthesized order sounds;

[0054] Step S104: The synthesized order sound is subjected to in-vehicle acoustic environment fusion and subjective and objective evaluation under operating conditions. Parameters of the synthesized order sound are modified based on the in-vehicle acoustic environment fusion and subjective and objective evaluation results to obtain an in-vehicle active sound audio file, and the vehicle speakers are driven to play the audio file.

[0055] The present embodiment provides an in-vehicle active sound control method that matches driving characteristics. First, by selecting sound design attributes based on the acoustic perception preferences of vehicle consumer groups, different driving groups can adjust the in-vehicle sound environment according to their preferences, effectively improving the satisfaction of car owners and making them feel more comfortable during driving. Second, a relationship between sound amplitude and vehicle driving characteristics is established, covering different driving conditions such as acceleration, constant speed, and deceleration, which can ensure that the vehicle sound is highly matched with the actual driving state, making the sound changes in the car natural and smooth. Third, by adjusting the amplitude of basic order sounds, dynamic adjustments can be made according to the actual operating state of the vehicle. Finally, through the integration of the in-vehicle sound environment and subjective and objective evaluation, the sound design is further optimized based on the customer's subjective feelings and objective data of the in-vehicle environment, and the sound design solution is continuously improved to ensure that the sound quality is optimal, so that car owners and passengers can enjoy a better sound quality experience.

[0056] As a specific embodiment, in step S101, the sound design attributes are selected based on the acoustic perception preferences of the vehicle consumer group. Specifically, sound quality parameters such as sportiness, power, refinement, quietness, and annoyingness that can represent the unique sound quality preferences of the vehicle target group are selected as a combination of sound design attributes according to the vehicle model market positioning and target consumer group, so as to meet the personalized needs of consumers, effectively improve the satisfaction of car owners, and thus enhance the driving experience of car owners.

[0057] As a preferred embodiment, in step S102, the driving characteristics of the vehicle are first analyzed. The typical driving characteristics path diagram is as follows: Figure 2As shown, the differences in in-vehicle sound amplitude across various operating conditions, including idling, constant speed, coasting, rapid acceleration, and slow acceleration, fall within a specific dynamic range. To match driving characteristics, the designed sound amplitude must remain within a reasonable range under various operating conditions. Furthermore, considering that in-vehicle engine sound exhibits varying amplitudes and frequency characteristics at varying vehicle speeds and accelerator pedal positions, and that the sound amplitude continuously changes with changes in vehicle speed and accelerator pedal position, a formula can be used to characterize the relative relationship between sound amplitudes under different operating conditions.

[0058] This embodiment proposes several relative relationship expressions for sound amplitudes between different working conditions, including commonly used typical working conditions such as acceleration and uniform speed, uniform speed and deceleration, slow acceleration and fast acceleration, etc. Specifically:

[0059] (1) When the vehicle driving characteristics are acceleration and constant speed conditions, the corresponding relationship between the sound amplitude and the vehicle driving characteristics is expressed by the formula:

[0060] d a =d c +α1·v+β1·(p a -p c )+σ1

[0061] Where v is the speed of the vehicle in any state, d a is the amplitude of the sound inside the car when the speed is v under acceleration conditions, d c is the amplitude of the sound inside the car when the speed is v under uniform speed conditions, p a is the opening of the accelerator pedal under acceleration conditions, p c is the opening of the accelerator pedal under uniform speed conditions, α1 is the weight coefficient of vehicle speed, β1 is the weight coefficient of the accelerator pedal opening, and σ1 is a constant coefficient term.

[0062] (2) When the vehicle driving characteristics are constant speed and deceleration conditions, the corresponding relationship between the sound amplitude and the vehicle driving characteristics is expressed by the formula:

[0063] d c =d m +α2·v+β2·p c +σ2

[0064] Where v is the vehicle speed in any state, d c is the amplitude of the sound inside the car when the speed is v under uniform speed conditions, d m is the amplitude of the sound inside the car when the speed is v under deceleration conditions, p c is the opening of the accelerator pedal under uniform speed conditions, α2 is the weight coefficient of vehicle speed, β2 is the weight coefficient of the accelerator pedal opening, and σ2 is a constant coefficient term.

[0065] (3) When the vehicle driving characteristics are slow acceleration and fast acceleration conditions, the corresponding relationship between the sound amplitude and the vehicle driving characteristics is expressed by the formula:

[0066] d h =d s +α3·v+β3·(p h -p s )+σ3

[0067] Where v is the vehicle speed in any state, d h is the amplitude of the sound inside the car when the speed is v under fast acceleration conditions, d s is the amplitude of the sound inside the car when the speed is v under slow acceleration conditions, p h is the opening of the accelerator pedal under fast acceleration conditions, p s is the opening of the accelerator pedal under slow acceleration conditions, α3 is the weight coefficient of vehicle speed, β3 is the weight coefficient of the accelerator pedal opening, and σ3 is a constant coefficient term.

[0068] By designing the relative relationship between the sound amplitudes of different working conditions, an objective and specific quantitative reference can be provided for the sound amplitude design under different working conditions, and a scientific and professional guidance basis can be provided for the design of the sound amplitude, thus avoiding the incoherence and separation of the sound transition between different working conditions caused by blindly designing the sound amplitude.

[0069] As a specific embodiment, multiple basic order sounds for order matching are determined based on sound design attributes and driving characteristics, specifically including: quantifying subjective parameters based on psychoacoustic models (such as the Zwicker loudness model), converting sound quality targets into frequency domain energy distribution requirements, and determining the order range to be enhanced or suppressed; at the same time, based on the main order identification of the engine / motor: for example, the main order of a four-cylinder engine is 2nd order (the fundamental frequency is the speed / 30), the main order of the motor is related to the number of pole pairs (such as 48th order corresponds to the relationship between motor speed and number of poles), and introducing non-integer orders (such as 0.5th order for suppressing clutch vibration) or higher harmonics (such as 6th order for enhancing the sense of movement) according to sound quality requirements.

[0070] In practice, a two-way mapping of sound quality attributes to driving conditions, combined with dynamic weighting and phase synchronization algorithms, achieves a scientifically tailored balance of fundamental sound orders. The core of this approach is to transform subjective acoustic objectives into quantifiable order parameters, and then adjust them in real time using multi-sensor data, balancing brand identity and driving experience.

[0071] As a preferred embodiment, in step S103, multiple basic order sounds for order matching are determined according to the sound design attributes and driving characteristics, including:

[0072] Select m basic order sounds for order synthesis, and the synthesized order sound is expressed by the formula:

[0073]

[0074] Among them, S asd For the synthetic order sound, A i is the amplitude coefficient of any fundamental order sound, w i is the angular frequency, f i is the frequency, n is the speed r / min, θ i is the order coefficient, φ i The initial phase.

[0075] As a preferred embodiment, the amplitude of the fundamental order sound is adjusted based on the vehicle operating state parameter to obtain the synthesized order sound, further comprising:

[0076] The amplitude coefficient of any order is adjusted based on the vehicle's rotational speed, speed, acceleration, and throttle opening parameters, which can be expressed as follows:

[0077]

[0078] in, are the weight factors corresponding to the rotation speed, vehicle speed, acceleration and throttle opening of any order sound under the vehicle driving condition, are the amplitude factors of any order sound corresponding to the rotational speed, vehicle speed, acceleration and throttle opening under the vehicle driving condition.

[0079] The fundamental order sound used for order matching is determined based on the sound's design attributes and driving characteristics, and the amplitude of the fundamental order sound is adjusted by selecting four vehicle operating state parameters: rotational speed, vehicle speed, acceleration, and throttle opening. For example, at low speeds and low rotational speeds, the fundamental order sound is generally relatively smooth; at high speeds or high rotational speeds, the sound may be more stimulating and penetrating. The fundamental order sound needs to be appropriately adjusted under these different operating conditions to ensure that the sound changes match the actual state of the vehicle. When the vehicle is operating at high rotational speeds, the fundamental order frequency may be higher, and the sound will have richer harmonics; at low rotational speeds, lower order sounds can be selected, resulting in a deeper, low-frequency sound.

[0080] By introducing acceleration parameters, the sound quality under different acceleration conditions can be fine-tuned, especially the adjustment of sporty and powerful sound quality is more precise and controllable.

[0081] As a preferred embodiment, the weight factors of any order sound corresponding to the rotational speed, vehicle speed, acceleration and throttle opening under the vehicle driving condition are determined by driving characteristics; the weight factors of any order sound corresponding to the rotational speed, vehicle speed, acceleration and throttle opening under the vehicle driving condition are determined by sound design attributes.

[0082] Specifically, the previous analysis can be used to derive the inherent connections and reasonable ranges of the driving sounds in the car under different driving conditions. Combined with the expert knowledge model, the values of the weight factors representing the driving characteristics under different driving conditions can be obtained, thereby determining the

[0083] It is mainly determined by the design properties of the sound, with the amplitude factor corresponding to the speed n Take the following example to illustrate the calculation method.

[0084] It can be obtained by k-order polynomial fitting, as shown below:

[0085]

[0086] Among them, the coefficients b0, b1, b2…b k The order k is determined by the initial design preferences of the sound design attributes sportiness, power, refinement, quietness, and annoyingness.

[0087] The above formula allows for quantitative design of the sound quality of active sound production. Combined with the subjective and objective evaluations discussed later, this allows for efficient parameter correction of sound quality. Furthermore, using the formula proposed in this invention for sound design can significantly reduce the computing power and memory usage of chip sound synthesis, further reducing product costs and shortening development cycles.

[0088] As a preferred embodiment, in step S104, the synthesized order sound is subjected to in-vehicle acoustic environment fusion under operating conditions, including:

[0089] Optimize the synthesized order sound based on the various types of acoustic products in the vehicle, the electroacoustic transmission characteristics of the vehicle playback system, the vehicle's internal cavity acoustic modes, and the vehicle's internal sound absorption and reflection factors;

[0090] The synthesized order sound is evaluated subjectively and objectively in the vehicle under operating conditions, including: evaluating the satisfaction level of the synthesized order sound.

[0091] As a specific embodiment, after the synthetic order sound is designed through order matching and amplitude adjustment, the order sound needs to be integrated with the in-vehicle acoustic environment under operating conditions and evaluated subjectively and objectively, so as to modify the design parameters of the order synthesis link. The acoustic environment integration needs to be integrated with the characteristics of other acoustic products of the vehicle. The designed sound must not be too abrupt. At the same time, factors such as the electroacoustic transmission characteristics of the vehicle playback system, the acoustic modes of the vehicle's internal cavity, and the vehicle's internal sound absorption and reflection must also be considered. The subjective and objective evaluation is a satisfaction assessment of the designed sound, mainly considering the unique sound quality preferences and driving habits of Chinese people of different genders and ages, and whether it matches the initial sound design attributes and vehicle driving characteristics. If the designed sound is significantly different from the initially set sound attributes and driving characteristics, the parameters of the order matching and amplitude adjustment need to be modified. Through cyclic evaluation and correction, the designed sound will eventually meet the requirements.

[0092] like Figure 3 As shown, Figure 3 A schematic diagram of the operating condition sound environment fusion and subjective and objective evaluation process is shown.

[0093] In order to more clearly demonstrate the method of this embodiment, Figure 4 As shown, Figure 4 This is a schematic diagram of the process framework of the active in-vehicle sound design and development method that matches driving characteristics provided by the present invention.

[0094] like Figure 5 As shown, this embodiment further provides an in-vehicle active sound control device 500 that matches driving characteristics, including:

[0095] A design attribute acquisition module 501 is used to select sound design attributes based on the acoustic perception preferences of vehicle consumer groups;

[0096] A driving characteristics modeling module 502 is used to establish a corresponding relationship between sound amplitude and vehicle driving characteristics; the vehicle driving characteristics include acceleration and constant speed conditions, constant speed and deceleration conditions, and slow acceleration and fast acceleration conditions;

[0097] a synthesized order sound generation module 503 for determining a plurality of basic order sounds for order matching based on sound design attributes and driving characteristics, and adjusting the amplitudes of the basic order sounds based on vehicle operating state parameters to obtain synthesized order sounds;

[0098] The active sound playback module 504 is used to integrate the synthesized order sound with the in-vehicle sound environment under the operating conditions and conduct subjective and objective evaluations. Based on the results of the in-vehicle sound environment integration and subjective and objective evaluations, the synthesized order sound parameters are modified to obtain an in-vehicle active sound audio file, and the vehicle speakers are driven to play the audio file.

[0099] This embodiment also provides a vehicle, including the in-vehicle active sound control device that matches driving characteristics as described in the above technical solution.

[0100] The present invention provides a method and device for controlling in-vehicle active sound generation that matches driving characteristics. This method comprehensively considers the coupling relationship between sound design attributes and vehicle driving characteristics, synthesizes sound orders based on initial sound design attributes and driving characteristics, and reads operating state parameters representing vehicle driving characteristics from the CAN bus in real time for amplitude adjustment of the synthesized order sound. The preliminarily designed sound is integrated with the acoustic environment under the vehicle's operating conditions to match the in-vehicle sound field information under different driving conditions. Using the unique sound quality preferences and driving habits of the automotive consumer group as subjective and objective evaluation criteria, the design parameters for order matching and amplitude adjustment are modified. Finally, the designed sound is implemented as a software or hardware module, and the sound is driven by the vehicle's onboard speakers through an amplifier. This can significantly improve driving pleasure, enhance the matching of vehicle sound with driving conditions, and improve vehicle adaptability. This precise sound adjustment not only meets consumers' demand for a personalized experience but also enhances the brand's differentiated competitiveness.

[0101] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A method for active in-vehicle sound control that matches driving characteristics, characterized in that: include: Select sound design attributes based on the acoustic perception preferences of vehicle consumer groups; Establishing the corresponding relationship between sound amplitude and vehicle driving characteristics; The vehicle driving characteristics include acceleration and constant speed conditions, constant speed and deceleration conditions, slow acceleration and fast acceleration conditions; Determining a plurality of basic order sounds for order matching based on sound design attributes and driving characteristics, and adjusting the amplitudes of the basic order sounds based on vehicle operating state parameters to obtain synthesized order sounds; The synthesized order sound is subjected to in-vehicle acoustic environment fusion and subjective and objective evaluation under operating conditions, and parameters of the synthesized order sound are modified based on the in-vehicle acoustic environment fusion and subjective and objective evaluation results to obtain an in-vehicle active sound audio file, and the vehicle speaker is driven to play the audio file.

2. The method for controlling active in-vehicle sound according to claim 1, wherein: When the vehicle driving characteristics are acceleration and constant speed conditions, the corresponding relationship between the sound amplitude and the vehicle driving characteristics is expressed by the formula: d a =d c +α1·v+β1·(p a -p c )+σ1 Where v is the speed of the vehicle in any state, d a is the amplitude of the sound inside the car when the speed is v under acceleration conditions, d c is the amplitude of the sound inside the car when the speed is v under uniform speed conditions, p a is the opening of the accelerator pedal under acceleration conditions, p c is the opening of the accelerator pedal under uniform speed conditions, α1 is the weight coefficient of vehicle speed, β1 is the weight coefficient of the accelerator pedal opening, and σ1 is a constant coefficient term.

3. The method for controlling active in-vehicle sound according to claim 1, wherein: When the vehicle driving characteristics are constant speed and deceleration conditions, the corresponding relationship between the sound amplitude and the vehicle driving characteristics is expressed by the formula: d c =d m +α2·v+β2·p c +σ2 Where v is the vehicle speed in any state, d c is the amplitude of the sound inside the car when the speed is v under uniform speed conditions, d m is the amplitude of the sound inside the car when the speed is v under deceleration conditions, p c is the opening of the accelerator pedal under uniform speed conditions, α2 is the weight coefficient of vehicle speed, β2 is the weight coefficient of the accelerator pedal opening, and σ2 is a constant coefficient term.

4. The method for controlling active in-vehicle sound according to claim 1, wherein: When the vehicle driving characteristics are slow acceleration and fast acceleration conditions, the corresponding relationship between the sound amplitude and the vehicle driving characteristics is expressed by the formula: d h =d s +α3·v+β3·(p h -p s )+σ3 Where v is the vehicle speed in any state, d h is the amplitude of the sound inside the car when the speed is v under fast acceleration conditions, d s is the amplitude of the sound inside the car when the speed is v under slow acceleration conditions, p h is the opening of the accelerator pedal under fast acceleration conditions, p s is the opening of the accelerator pedal under slow acceleration conditions, α3 is the weight coefficient of vehicle speed, β3 is the weight coefficient of the accelerator pedal opening, and σ3 is a constant coefficient term.

5. The method for controlling active in-vehicle sound according to claim 1, wherein: The amplitude of the basic order sound is adjusted based on the vehicle operating state parameter to obtain a synthetic order sound, including: Select m basic order sounds for order synthesis, and the synthesized order sound is expressed by the formula: Among them, S asd For the synthetic order sound, A i is the amplitude coefficient of any fundamental order sound, w i is the angular frequency, φ i The initial phase.

6. The method for controlling active in-vehicle sound according to claim 5, wherein: The method further comprises: adjusting the amplitude of the fundamental order sound based on the vehicle operating state parameter to obtain a synthetic order sound; The amplitude coefficient of any basic order is adjusted based on the vehicle's rotational speed, speed, acceleration, and throttle opening parameters, which can be expressed as follows: in, are the weight factors corresponding to the rotation speed, vehicle speed, acceleration and throttle opening of any order sound under the vehicle driving condition, are the amplitude factors of any order sound corresponding to the rotational speed, vehicle speed, acceleration and throttle opening under the vehicle driving condition.

7. The method for controlling active in-vehicle sound according to claim 6, wherein: The weight factors corresponding to the rotational speed, vehicle speed, acceleration and throttle opening of any order sound under the vehicle driving condition are determined by the driving characteristics; the weight factors corresponding to the rotational speed, vehicle speed, acceleration and throttle opening of any order sound under the vehicle driving condition are determined by the sound design attributes.

8. The method for controlling active in-vehicle sound according to claim 1, wherein: The synthesized order sound is subjected to an in-vehicle acoustic environment fusion under operating conditions, including: Optimize the synthesized order sound based on the various types of acoustic products in the vehicle, the electroacoustic transmission characteristics of the vehicle playback system, the vehicle's internal cavity acoustic modes, and the vehicle's internal sound absorption and reflection factors; The synthesized order sound is evaluated subjectively and objectively in the vehicle under operating conditions, including: evaluating the satisfaction level of the synthesized order sound.

9. An active in-vehicle sound control device that matches driving characteristics, characterized in that: include: A design attribute acquisition module is used to select sound design attributes based on the acoustic perception preferences of vehicle consumer groups; Driving characteristics modeling module, used to establish the corresponding relationship between sound amplitude and vehicle driving characteristics; The vehicle driving characteristics include acceleration and constant speed conditions, constant speed and deceleration conditions, slow acceleration and fast acceleration conditions; a synthetic order sound generation module, configured to determine a plurality of basic order sounds for order matching based on sound design attributes and driving characteristics, and to adjust the amplitudes of the basic order sounds based on vehicle operating state parameters to obtain synthetic order sounds; The active sound playback module is used to integrate the synthesized order sound with the in-vehicle sound environment under operating conditions and conduct subjective and objective evaluations, perform parameter corrections on the synthesized order sound based on the results of the in-vehicle sound environment integration and subjective and objective evaluations, obtain an in-vehicle active sound audio file, and drive the vehicle speakers to play the audio file.

10. A vehicle, characterized in that: The vehicle includes the in-vehicle active sound control device adapted to driving characteristics as claimed in claim 9 .

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