CN115452399A - Method and device for evaluating quality of automobile acceleration sound, computer equipment and storage medium - Google Patents
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Abstract
The invention relates to the field of automobile noise processing, and discloses an automobile acceleration sound quality evaluation method, an automobile acceleration sound quality evaluation device, computer equipment and a storage medium, wherein the method comprises the following steps: acquiring a primary order sound pressure amplitude, a first harmonic order sound pressure amplitude and a second harmonic order sound pressure amplitude of noise data at a specified rotating speed; the first harmonic sound pressure amplitude is the sound pressure amplitude of the maximum harmonic after the primary order; the second harmonic sound pressure amplitude is the sound pressure amplitude of the second harmonic order after the primary order; determining a sound pressure amplitude slope according to the primary order sound pressure amplitude, the first harmonic order sound pressure amplitude and the second harmonic order sound pressure amplitude; and determining the order attenuation rate at the specified rotating speed according to the sound pressure amplitude slope and the primary order. The order attenuation rate determined by the invention can better balance the dynamic feeling and the pleasure feeling, and is beneficial to improving the quality of automobile acceleration sound.
Description
Technical Field
The invention relates to the field of automobile noise processing, in particular to an automobile acceleration sound quality evaluation method and device, computer equipment and a storage medium.
Background
The sound quality parameter is an index considering a human psychosensory factor, and is often used to evaluate the quality of switching on and off a door, the quality of an electric accessory sound, the quality of an acoustic sound, and the like. The acceleration sound quality is one of sound quality parameters for evaluating human perception of noise generated when an automobile is accelerated.
The dynamic feeling (or called force quantity feeling) of the acceleration sound quality of the automobile engine is related to the modulation amplitude of the sound. The in-vehicle noise without the feeling of booming is considered to be a pleasant feeling (or called a sense of calm). The increase in dynamic feeling causes a decrease in quietness. A suitable sound pressure level of rolling sensation should be sought to balance dynamic and pleasurable sensations.
In the prior art, the quality of the accelerated sound can be characterized by parameters such as loudness, sharpness, roughness, and fluctuation. However, such parameters cannot be used to determine whether the balance between the dynamic and pleasant sensations is balanced, and whether the overall auditory effect is harmonious.
Disclosure of Invention
In view of the above, it is necessary to provide a method, an apparatus, a computer device and a storage medium for evaluating the quality of an acceleration sound of an automobile, so as to better balance the dynamic feeling and the pleasure feeling.
An automobile acceleration sound quality evaluation method comprises the following steps:
acquiring a primary order sound pressure amplitude, a first harmonic order sound pressure amplitude and a second harmonic order sound pressure amplitude of noise data at a specified rotating speed; the first harmonic sound pressure amplitude is the sound pressure amplitude of the maximum harmonic order after the primary order; the second harmonic sound pressure amplitude is a sound pressure amplitude of a second harmonic order after the primary order;
determining a sound pressure amplitude slope according to the primary order sound pressure amplitude, the first harmonic order sound pressure amplitude and the second harmonic order sound pressure amplitude;
and determining the order attenuation rate at the specified rotating speed according to the sound pressure amplitude slope and the primary order.
An automobile acceleration sound quality evaluation device comprising:
the sound pressure amplitude acquisition module is used for acquiring a primary order sound pressure amplitude, a first harmonic order sound pressure amplitude and a second harmonic order sound pressure amplitude of the noise data at a specified rotating speed; the first harmonic sound pressure amplitude is the sound pressure amplitude of the maximum harmonic order after the primary order; the second harmonic sound pressure amplitude is a sound pressure amplitude of a second harmonic order after the primary order;
a sound pressure amplitude slope determining module, configured to determine a sound pressure amplitude slope according to the primary-order sound pressure amplitude, the first harmonic-order sound pressure amplitude, and the second harmonic-order sound pressure amplitude;
and the order attenuation rate determining module is used for determining the order attenuation rate at the specified rotating speed according to the sound pressure amplitude slope and the primary order.
A computer device comprises a memory, a processor and computer readable instructions stored in the memory and capable of running on the processor, wherein the processor executes the computer readable instructions to realize the automobile acceleration sound quality evaluation method.
One or more readable storage media storing computer readable instructions that, when executed by one or more processors, cause the one or more processors to perform the method for evaluating the quality of accelerated sound of an automobile as described above.
According to the automobile acceleration sound quality evaluation method, the automobile acceleration sound quality evaluation device, the computer equipment and the storage medium, the order attenuation rate can be obtained by evaluating the first three order components of the contribution in the sound signal, and the order attenuation rate can be used for measuring whether the dynamic feeling and the pleasure feeling of the noise of the engine are balanced or not, so that the automobile acceleration sound quality can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of an application environment of a method for evaluating the quality of an accelerated sound of an automobile according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a method for evaluating the quality of an automobile acceleration sound according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an apparatus for evaluating the quality of an accelerated sound of a vehicle according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a computer device according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The method for evaluating the quality of the car acceleration sound provided by the embodiment can be applied to the application environment shown in fig. 1, wherein the client communicates with the server. The client includes, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices. The server can be implemented by an independent server or a server cluster composed of a plurality of servers.
In an embodiment, as shown in fig. 2, a method for evaluating the quality of an accelerated sound of an automobile is provided, which is described by taking the method applied to the server in fig. 1 as an example, and includes the following steps S10 to S30.
S10, acquiring a primary order sound pressure amplitude, a first harmonic order sound pressure amplitude and a second harmonic order sound pressure amplitude of noise data at a specified rotating speed; the first harmonic sound pressure amplitude is the sound pressure amplitude of the maximum harmonic order after the primary order; the second harmonic sound pressure amplitude is a sound pressure amplitude of a second harmonic order after the primary order.
Understandably, in the frequency spectrum of the noise data, the order refers to a sound component having a frequency f (Hz) and an engine speed R (R/s) in a certain proportional relationship of n = f/R, and the order can be represented by n. The major order refers to the order in which the sound pressure level is the largest among all orders. Harmonic order refers to the order component of all orders that is proportional to the dominant order. The primary sound pressure amplitude is the primary sound pressure amplitude. The first harmonic sound pressure amplitude is then the sound pressure amplitude of the maximum harmonic after the primary order. The second harmonic sound pressure amplitude is the sound pressure amplitude of the second harmonic order following the primary order. Here, the maximum harmonic order refers to an order in which the sound pressure amplitude is maximum, except for the primary order, among all orders. The second harmonic order refers to an order of which the sound pressure amplitude is largest, except for the primary order and the maximum harmonic order, among all orders.
In some examples, the primary order is 2 th order, the maximum harmonic after the primary order is 4 th order, and the second maximum harmonic after the primary order is 6 th order.
In some examples, the major order is 3 th order, the maximum harmonic after the major order is 4.5 th order, and the second largest harmonic after the major order is 6 th order.
In some examples, the major order is 3 th order, the maximum harmonic after the major order is 1.5 th order, and the second maximum harmonic after the major order is 4.5 th order.
In one example, step S10 of acquiring the primary order sound pressure amplitude, the first harmonic order sound pressure amplitude and the second harmonic order sound pressure amplitude of the noise data at a specified rotation speed includes:
s101, extracting a sound signal corresponding to the specified rotating speed from the noise data;
s102, carrying out short-time Fourier transform on the sound signal to obtain a time frequency spectrum;
s103, extracting the primary order sound pressure amplitude, the first harmonic order sound pressure amplitude and the second harmonic order sound pressure amplitude from the time frequency spectrum by adopting an order tracking method.
Understandably, the noise data includes sound signals at a plurality of rotational speeds. The method comprises the steps of extracting a sound signal corresponding to a specified rotating speed from noise data, then carrying out short-time Fourier transform on the sound signal to generate a time frequency spectrum, and finally extracting a main-order sound pressure amplitude, a first harmonic-order sound pressure amplitude and a second harmonic-order sound pressure amplitude from the time frequency spectrum by adopting an order tracking method.
The embodiment uses the short-time Fourier transform and the order tracking method to process the noise data and extracts the sound pressure amplitude, and has simple operation and low processing difficulty.
S20, determining a sound pressure amplitude slope according to the primary order sound pressure amplitude, the first harmonic order sound pressure amplitude and the second harmonic order sound pressure amplitude.
Understandably, after obtaining the primary-order sound pressure amplitude, the first harmonic-order sound pressure amplitude and the second harmonic-order sound pressure amplitude, fitting the three sound pressure amplitudes through a linear regression method to obtain a fitting straight line y = k × n + b, wherein y represents the sound pressure amplitude, k is the slope of the sound pressure amplitude, n is the order, and b is the intercept of the fitting straight line on the y axis when the order is 0.
And S30, determining the order attenuation rate at the specified rotating speed according to the sound pressure amplitude slope and the primary order.
In one example, the step S30 of determining an order decay rate at the specified rotation speed according to the sound pressure amplitude slope and the primary order includes:
s301, processing the sound pressure amplitude slope and the primary order through an order attenuation rate calculation formula to generate the order attenuation rate, wherein the order attenuation rate calculation formula comprises:
ODR＝|k|·N
wherein ODR is the order decay rate;
k is the sound pressure amplitude slope;
and N is the primary order.
Understandably, the order attenuation rate of the noise data at the designated rotation speed can be calculated by the above order attenuation rate calculation formula. The order decay rate is the product of the absolute value of the sound pressure amplitude slope and the primary order.
The order decay rate characterizes the diminishing effect of the sound spectrum. The quality of the acceleration sound can be classified into a dynamic feeling and a pleasant feeling. Although the two are not strictly corresponding, in general, there is a negative correlation between the two senses. The order decay rate may measure both "power" and "pleasure". Here, the order attenuation rate measures the degree of prominence and modulation effect of sound by evaluating the order component three before the contribution amount in the sound signal. The larger the order attenuation rate is, the more severe the attenuation of the representative order is, the greater the sound pressure level of the major order is obviously greater than the harmonic order, and the stronger the "dynamic feeling" of the sound quality is. The smaller the order attenuation rate, the less severe the attenuation of the representative order, the closer the harmonic pressure level of the primary order, and the stronger the "pleasant" sound quality.
Optionally, after step S30, that is, after determining the order attenuation rate at the specified rotation speed according to the sound pressure amplitude slope and the primary order, the method includes:
s40, acquiring a plurality of order attenuation rates in a specified rotating speed interval, and generating attenuation rate distribution data;
and S50, generating sound quality evaluation data of the automobile engine according to the attenuation rate distribution data.
Understandably, the designated rotation speed interval can be set according to actual needs, and can be 0-5000 r/s, for example. The order attenuation rate corresponding to each rotational speed can be calculated in accordance with the method of steps S10 to S30, and attenuation rate distribution data can be generated. In some examples, the decay rate profile data may be represented by an order decay rate-rotational speed curve.
Then, the attenuation factor distribution data is analyzed to generate sound quality evaluation data. In some examples, the acoustic quality assessment data includes, but is not limited to, peak rotational speed of order decay rate, highest order decay rate, rate of change of order decay rate in an order decay rate-rotational speed curve.
In the embodiment, more comprehensive sound quality evaluation data of the automobile engine can be obtained by analyzing the order attenuation rates at different rotating speeds.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In one embodiment, an apparatus for evaluating the quality of an automobile accelerating sound is provided, wherein the apparatus corresponds to the method for evaluating the quality of an automobile accelerating sound in one-to-one correspondence. As shown in fig. 3, the apparatus for evaluating the quality of the accelerated sound of the vehicle comprises a module 10 for obtaining the sound pressure amplitude, a module 20 for determining the slope of the sound pressure amplitude, and a module 30 for determining the order attenuation rate. The detailed description of each functional module is as follows:
the sound pressure amplitude obtaining module 10 is configured to obtain a primary order sound pressure amplitude, a first harmonic order sound pressure amplitude, and a second harmonic order sound pressure amplitude of the noise data at a specified rotation speed; the first harmonic sound pressure amplitude is the sound pressure amplitude of the maximum harmonic order after the primary order; the second harmonic sound pressure amplitude is a sound pressure amplitude of a second harmonic order after the primary order;
a sound pressure amplitude slope determining module 20, configured to determine a sound pressure amplitude slope according to the primary-order sound pressure amplitude, the first harmonic-order sound pressure amplitude, and the second harmonic-order sound pressure amplitude;
and the order attenuation rate determining module 30 is used for determining the order attenuation rate at the specified rotating speed according to the sound pressure amplitude slope and the primary order.
Optionally, the module 10 for obtaining the sound pressure amplitude includes:
an extraction sound signal unit for extracting a sound signal corresponding to the specified rotation speed from the noise data;
an obtaining time frequency spectrum unit, which is used for carrying out short-time Fourier transform on the sound signal to obtain a time frequency spectrum;
an amplitude extraction unit, configured to extract the primary-order sound pressure amplitude, the first harmonic-order sound pressure amplitude, and the second harmonic-order sound pressure amplitude from the time-frequency spectrum by using an order tracking method.
Optionally, the primary order is 2 orders, the maximum harmonic order after the primary order is 4 orders, and the second maximum harmonic order after the primary order is 6 orders.
Optionally, the primary order is 3 orders, the maximum harmonic order after the primary order is 4.5 orders, and the second maximum harmonic order after the primary order is 6 orders.
Optionally, the primary order is 3 orders, the maximum harmonic order after the primary order is 1.5 orders, and the second maximum harmonic order after the primary order is 4.5 orders.
Optionally, the module 30 for determining the order decay rate includes:
a formula processing unit, configured to process the sound pressure amplitude slope and the primary order through an order attenuation rate calculation formula to generate the order attenuation rate, where the order attenuation rate calculation formula includes:
ODR＝|k|·N
wherein ODR is the order decay rate;
k is the sound pressure amplitude slope;
and N is the primary order.
Optionally, the device for evaluating the quality of the acceleration sound of the vehicle further comprises:
the distribution data generating module is used for acquiring a plurality of the order attenuation rates in a specified rotating speed interval and generating attenuation rate distribution data;
and the generation evaluation data module is used for generating sound quality evaluation data of the automobile engine according to the attenuation rate distribution data.
For specific limitations of the device for evaluating the quality of an automobile accelerating sound, reference may be made to the above limitations of the method for evaluating the quality of an automobile accelerating sound, and details thereof are not repeated herein. The above-described automobile accelerating sound quality evaluating apparatus may be implemented in whole or in part by software, hardware, or a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, and the internal structure thereof may be as shown in fig. 4. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a readable storage medium and an internal memory. The readable storage medium stores an operating system, computer readable instructions, and a database. The internal memory provides an environment for the operating system and execution of computer-readable instructions in the readable storage medium. The database of the computer equipment is used for storing data related to the automobile acceleration sound quality evaluation method. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer readable instructions are executed by a processor to implement a method for evaluating the quality of an automobile acceleration sound. The readable storage media provided by the present embodiment include nonvolatile readable storage media and volatile readable storage media.
In one embodiment, a computer device is provided, comprising a memory, a processor, and computer readable instructions stored on the memory and executable on the processor, the processor when executing the computer readable instructions implementing the steps of:
acquiring a primary order sound pressure amplitude, a first harmonic order sound pressure amplitude and a second harmonic order sound pressure amplitude of noise data at a specified rotating speed; the first harmonic sound pressure amplitude is the sound pressure amplitude of the maximum harmonic order after the primary order; the second harmonic sound pressure amplitude is a sound pressure amplitude of a second harmonic order after the primary order;
determining a sound pressure amplitude slope according to the primary order sound pressure amplitude, the first harmonic order sound pressure amplitude and the second harmonic order sound pressure amplitude;
and determining the order attenuation rate at the specified rotating speed according to the sound pressure amplitude slope and the primary order.
In one embodiment, one or more computer-readable storage media storing computer-readable instructions are provided, the readable storage media provided by the embodiments including non-volatile readable storage media and volatile readable storage media. The readable storage medium has stored thereon computer readable instructions which, when executed by one or more processors, perform the steps of:
acquiring a primary order sound pressure amplitude, a first harmonic order sound pressure amplitude and a second harmonic order sound pressure amplitude of noise data at a specified rotating speed; the first harmonic sound pressure amplitude is the sound pressure amplitude of the maximum harmonic order after the primary order; the second harmonic sound pressure amplitude is a sound pressure amplitude of a second harmonic order after the primary order;
determining a sound pressure amplitude slope according to the primary order sound pressure amplitude, the first harmonic order sound pressure amplitude and the second harmonic order sound pressure amplitude;
and determining the order attenuation rate at the specified rotating speed according to the sound pressure amplitude slope and the primary order.
It will be understood by those of ordinary skill in the art that all or part of the processes of the methods of the above embodiments may be implemented by hardware related to computer readable instructions, which may be stored in a non-volatile readable storage medium or a volatile readable storage medium, and when executed, the computer readable instructions may include processes of the above embodiments of the methods. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), rambus (Rambus) direct RAM (RDRAM), direct Rambus Dynamic RAM (DRDRAM), and Rambus Dynamic RAM (RDRAM), among others.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (10)
1. A method for evaluating the quality of an automobile acceleration sound is characterized by comprising the following steps:
acquiring a primary order sound pressure amplitude, a first harmonic order sound pressure amplitude and a second harmonic order sound pressure amplitude of noise data at a specified rotating speed; the first harmonic sound pressure amplitude is the sound pressure amplitude of the maximum harmonic order after the primary order; the second harmonic sound pressure amplitude is a sound pressure amplitude of a second harmonic order after the primary order;
determining a sound pressure amplitude slope according to the primary order sound pressure amplitude, the first harmonic order sound pressure amplitude and the second harmonic order sound pressure amplitude;
and determining the order attenuation rate at the specified rotating speed according to the sound pressure amplitude slope and the primary order.
2. The method for evaluating the quality of an automobile accelerating sound according to claim 1, wherein the acquiring the primary-order sound pressure amplitude, the first-harmonic-order sound pressure amplitude and the second-harmonic-order sound pressure amplitude of the noise data at a specified rotation speed includes:
extracting a sound signal corresponding to the specified rotating speed from the noise data;
carrying out short-time Fourier transform on the sound signal to obtain a time frequency spectrum;
and extracting the primary order sound pressure amplitude, the first harmonic order sound pressure amplitude and the second harmonic order sound pressure amplitude from the time frequency spectrum by adopting an order tracking method.
3. The method for evaluating the quality of an automobile accelerating sound according to claim 1, wherein the primary order is 2 th order, the maximum harmonic order after the primary order is 4 th order, and the second maximum harmonic order after the primary order is 6 th order.
4. The method of claim 1, wherein the primary order is 3 orders, the maximum harmonic order after the primary order is 4.5 orders, and the second maximum harmonic order after the primary order is 6 orders.
5. The method of claim 1, wherein the primary order is 3 orders, the maximum harmonic order after the primary order is 1.5 orders, and the second maximum harmonic order after the primary order is 4.5 orders.
6. The method for evaluating the quality of an automobile accelerating sound according to claim 1, wherein the determining the order decay rate at the specified rotation speed based on the sound pressure amplitude slope and the primary order comprises:
processing the sound pressure amplitude slope and the primary order through an order attenuation rate calculation formula to generate the order attenuation rate, wherein the order attenuation rate calculation formula comprises:
ODR＝|k|·N
wherein ODR is the order decay rate;
k is the sound pressure amplitude slope;
and N is the primary order.
7. The method for evaluating the quality of an automobile accelerating sound according to claim 1, wherein the determining of the order attenuation rate at the specified rotation speed based on the slope of sound pressure amplitude and the primary order comprises:
acquiring a plurality of the order attenuation rates in a specified rotating speed interval, and generating attenuation rate distribution data;
and generating sound quality evaluation data of the automobile engine according to the attenuation rate distribution data.
8. An apparatus for evaluating the quality of an acceleration sound of an automobile, comprising:
the sound pressure amplitude acquisition module is used for acquiring a main order sound pressure amplitude, a first harmonic order sound pressure amplitude and a second harmonic order sound pressure amplitude of the noise data at a specified rotating speed; the first harmonic sound pressure amplitude is the sound pressure amplitude of the maximum harmonic order after the primary order; the second harmonic sound pressure amplitude is a sound pressure amplitude of a second harmonic order after the primary order;
a sound pressure amplitude slope determining module, configured to determine a sound pressure amplitude slope according to the primary-order sound pressure amplitude, the first harmonic-order sound pressure amplitude, and the second harmonic-order sound pressure amplitude;
and the order attenuation rate determining module is used for determining the order attenuation rate at the specified rotating speed according to the sound pressure amplitude slope and the primary order.
9. A computer device comprising a memory, a processor and computer readable instructions stored in the memory and executable on the processor, wherein the processor when executing the computer readable instructions implements the method for evaluating the quality of accelerated sound of a vehicle according to any one of claims 1 to 7.
10. One or more readable storage media storing computer readable instructions which, when executed by one or more processors, cause the one or more processors to perform the method of evaluating the quality of an accelerated sound of an automobile according to any one of claims 1 to 7.
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| CN202210916882.0A CN115452399A (en) | 2022-08-01 | 2022-08-01 | Method and device for evaluating quality of automobile acceleration sound, computer equipment and storage medium |
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| CN202210916882.0A CN115452399A (en) | 2022-08-01 | 2022-08-01 | Method and device for evaluating quality of automobile acceleration sound, computer equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115457976A (en) * | 2022-08-01 | 2022-12-09 | 广州汽车集团股份有限公司 | Accelerated sound quality evaluation method, device, computer equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115457976A (en) * | 2022-08-01 | 2022-12-09 | 广州汽车集团股份有限公司 | Accelerated sound quality evaluation method, device, computer equipment and storage medium |
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