Sound quality quantitative evaluation method and device

Abstract

The application discloses a sound quality quantitative evaluation method and device, and relates to the technical field of sound quality evaluation. According to the application, the discordance degrees of two kinds of sound are determined according to the frequencies of the two kinds of sound, and the disharmony degrees of the two kinds of sound are calculated according to the sound pressure levels and the discordance degrees of the two kinds of sound, so that the quantitative index discordance degree reflecting the turbidity of the two kinds of sound can be obtained, and quantitative evaluation of the turbidity of the sound is realized.

Description

Technical Field

[0001] This invention relates to the field of sound quality evaluation technology, and in particular to a method and apparatus for quantitative sound quality evaluation. Background Technology

[0002] Automotive components (such as engines, compressors, and motors) produce sounds at different frequencies during operation. These frequency differences can create a sense of muffled sound, significantly impacting the user experience. Excessive muffled sound can negatively affect the user experience. To improve the user experience, it's necessary to quantitatively evaluate the muffled sound produced by these components during the design phase, providing a basis for reducing this muffled sound. Summary of the Invention

[0003] This invention solves the technical problem of how to quantitatively evaluate the muddiness of sound by providing a method and apparatus for quantitatively evaluating sound quality.

[0004] On the one hand, the present invention provides the following technical solution:

[0005] A quantitative evaluation method for sound quality includes:

[0006] Acquire the first frequency and first sound pressure level of the first sound in the group of sounds to be evaluated, and the second frequency and second sound pressure level of the second sound, wherein the first frequency is less than the second frequency;

[0007] The degree of incoordination between the first sound and the second sound is determined based on the first frequency and the second frequency;

[0008] The degree of disharmony between the first sound and the second sound is calculated based on the first sound pressure level, the second sound pressure level, and the degree of incoherence.

[0009] Optionally, determining the degree of incoordination between the first sound and the second sound based on the first frequency and the second frequency includes:

[0010] If the second frequency is greater than twice the first frequency, then the degree of incoordination is determined to be the target setpoint.

[0011] If the second frequency is not greater than twice the first frequency, then the target frequency is calculated based on the first frequency and the first sound pressure level.

[0012] If the frequency difference between the second frequency and the first frequency is not greater than the target frequency, then the first frequency, the second frequency, and the target frequency are substituted into the first formula to calculate the degree of incoordination.

[0013] If the frequency difference is greater than the target frequency, then the first frequency, the second frequency, and the target frequency are substituted into the second formula to calculate the degree of incoordination.

[0014] Optionally, the first formula is:

[0015]

[0016] Let f1 be the first frequency, f2 be the second frequency, and f be the degree of incoordination. b For the target frequency, k0′=1, Co′=55.

[0017] Optionally, the second formula is:

[0018]

[0019] Let f1 be the degree of incoordination, f2 be the second frequency, and f1 be the first frequency. b For the target frequency, k0′=1, Co′=55.

[0020] Optionally, calculating the dissonance between the first sound and the second sound based on the first sound pressure level, the second sound pressure level, and the dissonance includes:

[0021]

[0022] For the degree of inharmony, The degree of incoordination is defined as follows: L1 is the first sound pressure level, L2 is the second sound pressure level, n1 = 0.15, n2 = 0.1.

[0023] Optionally, after calculating the dissonance between the first sound and the second sound based on the first sound pressure level, the second sound pressure level, and the dissonance, the method further includes:

[0024] The disharmony level of the target component noise is calculated based on the disharmony levels corresponding to the multiple sets of sounds to be evaluated generated by the target component.

[0025] Optionally, calculating the dissonance level of the target component noise based on the multiple dissonances corresponding to the multiple sets of sounds to be evaluated generated by the target component includes:

[0026]

[0027] D m The level of disharmony is M, and the number of sound groups to be evaluated is M. For the degree of incompatibility, k0′=1, D n0 For a given value.

[0028] On the other hand, the present invention also provides the following technical solution:

[0029] A device for quantitative evaluation of sound quality, comprising:

[0030] The acquisition module is used to acquire the first frequency and first sound pressure level of the first sound in the sound group to be evaluated, and the second frequency and second sound pressure level of the second sound, wherein the first frequency is less than the second frequency;

[0031] A determining module is configured to determine the degree of incoordination between the first sound and the second sound based on the first frequency and the second frequency;

[0032] The calculation module is used to calculate the degree of disharmony between the first sound and the second sound based on the first sound pressure level, the second sound pressure level, and the degree of disharmony.

[0033] On the other hand, the present invention also provides the following technical solution:

[0034] An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement any of the above-described quantitative evaluation methods for sound quality.

[0035] On the other hand, the present invention also provides the following technical solution:

[0036] A computer-readable storage medium storing a computer program that, when executed by a processor, implements any of the above-mentioned quantitative evaluation methods for sound quality.

[0037] One or more technical solutions provided by this invention have at least the following technical effects or advantages:

[0038] This invention determines the degree of incoordination between two sounds based on their frequencies with a frequency difference, and calculates the degree of disharmony between the two sounds based on their sound pressure levels and degree of incoordination. This yields a quantitative index of incoordination that reflects the muddiness of the two sounds, thus achieving a quantitative evaluation of the muddiness of the sound. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a flowchart of the quantitative evaluation method for sound quality in an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of multiple noise inhomogeneities corresponding to the engine in an embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the sound pressure level corresponding to each order of engine noise in an embodiment of the present invention;

[0043] Figure 4 This is a schematic diagram of the sound quality quantitative evaluation device in an embodiment of the present invention. Detailed Implementation

[0044] The embodiments of the present invention provide a method and apparatus for quantitatively evaluating sound quality, thereby solving the technical problem of how to quantitatively evaluate the muddiness of sound.

[0045] To better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] like Figure 1 As shown, the quantitative evaluation method for sound quality according to an embodiment of the present invention includes:

[0047] Step S1: Obtain the first frequency and first sound pressure level of the first sound in the sound group to be evaluated, and the second frequency and second sound pressure level of the second sound, wherein the first frequency is less than the second frequency;

[0048] Step S2: Determine the degree of incoordination between the first sound and the second sound based on the first frequency and the second frequency;

[0049] Step S3: Calculate the degree of disharmony between the first sound and the second sound based on the first sound pressure level, the second sound pressure level, and the degree of disharmony.

[0050] This invention uses a certain engine as an example. When a vehicle accelerates, the sound generated by the engine vibration can be muddy, easily causing discomfort. The noise generated by engine vibration is at different frequencies, and the noise can be extracted by order. For example, one type of noise can be extracted every 0.5 times in the order from 0.5 to 16.0. The 0.5 and 1.0 order noises are selected to form the sound group to be evaluated. The 0.5 order noise is the first sound, and the 1.0 order noise is the second sound.

[0051] Step S2 may specifically include: if the second frequency is greater than twice the first frequency, then the degree of incoherence is determined as the target value; if the second frequency is not greater than twice the first frequency, then the target frequency is calculated based on the first frequency and the first sound pressure level; if the frequency difference between the second frequency and the first frequency is not greater than the target frequency, then the first frequency, the second frequency, and the target frequency are substituted into the first formula to calculate the degree of incoherence; if the frequency difference between the second frequency and the first frequency is greater than the target frequency, then the first frequency, the second frequency, and the target frequency are substituted into the second formula to calculate the degree of incoherence.

[0052] The target value can be 55. The target frequency can be the frequency at which the two sounds are least harmonious, based on the first sound. Both the first and second formulas can be:

[0053]

[0054] When it is the first formula When it is the second formula in, For the degree of incoordination, f1 is the first frequency, f2 is the second frequency, and f... b For the target frequency, K0′=1, Co′=55.

[0055] To account for the inconsistency coefficient of environmental noise Co′, This eliminates the inconsistency caused by the environmental noise Co′.

[0056] Step S3 may specifically include: P0 = 10 57 / 20 , For disharmony, The degree of incoherence is defined as follows: L1 is the first sound pressure level, L2 is the second sound pressure level, n1 = 0.15, and n2 = 0.1. Incoherence is a quantitative indicator of the muddiness produced by two sounds with a frequency difference.

[0057] As can be seen from the above, the quantitative evaluation method for sound quality in this embodiment of the invention determines the degree of incoordination between two sounds based on their frequencies with a frequency difference, and calculates the degree of disharmony between the two sounds based on their sound pressure levels and degree of incoordination. This yields a quantitative index of incoordination that reflects the muddiness of the two sounds, thus achieving a quantitative evaluation of the muddiness of the sound.

[0058] Assuming that engine vibrations produce only two frequencies of sound during vehicle acceleration, the dissonance calculated in step S3 would represent the dissonance level of engine noise. However, engine noise actually includes noise of orders 0.5 to 16.0, and the dissonance of a single set of sounds cannot represent the dissonance level of engine noise. Therefore, it is necessary to calculate the dissonance of any two frequencies of noise obtained by extracting one type of noise every 0.5 orders, and then determine the dissonance level of engine noise based on multiple dissonances. That is, after step S3, the quantitative sound quality evaluation method can also include: calculating the dissonance level of the target component noise based on multiple dissonances corresponding to multiple sets of sounds to be evaluated generated by the target component. The target component can be the engine.

[0059] Figure 2This involves extracting one type of noise at every 0.5 orders, resulting in a combination of multiple noise orders. A total of 32 orders were extracted. These 32 noise orders can be combined pairwise to obtain... Group of sounds to be evaluated, such as Figure 2 n-region + c-region Figure 2 The dissonance of the sound groups to be evaluated in the middle n region is a target value of 55, and the sound pressure level corresponding to each order of noise is as follows: Figure 3 As shown, the dissonance of region c can be calculated. The dissonance level of the target component's noise can be calculated based on multiple dissonances corresponding to multiple sets of sounds to be evaluated generated by the target component. This can include:

[0060]

[0061] D m To represent the level of disharmony, M is the number of sound groups to be evaluated (496 for the engine). For the degree of disharmony, k0′=1, D n0 Given a value, the order difference can be 0.5. Engines exhibit different noise mismatch levels at different speeds; the noise mismatch level at each speed can be calculated by changing the engine speed.

[0062] like Figure 4 As shown, this embodiment of the invention also provides a sound quality quantitative evaluation device, comprising:

[0063] The acquisition module is used to acquire the first frequency and first sound pressure level of the first sound in the sound group to be evaluated, and the second frequency and second sound pressure level of the second sound, wherein the first frequency is less than the second frequency;

[0064] A determining module is used to determine the degree of incoordination between the first sound and the second sound based on the first frequency and the second frequency;

[0065] The calculation module is used to calculate the degree of dissonance between the first sound and the second sound based on the first sound pressure level, the second sound pressure level, and the degree of dissonance.

[0066] This invention uses a certain engine as an example. When a vehicle accelerates, the sound generated by the engine vibration can be muddy, easily causing discomfort. The noise generated by engine vibration is at different frequencies, and the noise can be extracted by order. For example, one type of noise can be extracted every 0.5 times in the order from 0.5 to 16.0. The 0.5 and 1.0 order noises are selected to form the sound group to be evaluated. The 0.5 order noise is the first sound, and the 1.0 order noise is the second sound.

[0067] The determination module can also be used to: determine the degree of incoherence as a target value if the second frequency is greater than twice the first frequency; calculate the target frequency based on the first frequency and the first sound pressure level if the second frequency is not greater than twice the first frequency; calculate the degree of incoherence by substituting the first frequency, the second frequency, and the target frequency into the first formula if the frequency difference between the second frequency and the first frequency is not greater than the target frequency; and calculate the degree of incoherence by substituting the first frequency, the second frequency, and the target frequency into the second formula if the frequency difference between the second frequency and the first frequency is greater than the target frequency.

[0068] The target value can be 55. The target frequency can be the frequency at which the two sounds are least harmonious, based on the first sound. Both the first and second formulas can be:

[0069]

[0070] When it is the first formula When it is the second formula in, For the degree of incoordination, f1 is the first frequency, f2 is the second frequency, and f... b For the target frequency, k0′=1, Co′=55.

[0071] To account for the inconsistency coefficient of environmental noise Co′, This eliminates the inconsistency caused by the environmental noise Co′.

[0072] The calculation module calculates the degree of dissonance between the first sound and the second sound based on the first sound pressure level, the second sound pressure level, and the degree of incoherence. Specifically, this may include: P0 = 10 57 / 20 , For disharmony, The degree of incoherence is defined as follows: L1 is the first sound pressure level, L2 is the second sound pressure level, n1 = 0.15, and n2 = 0.1. Incoherence is a quantitative indicator of the muddiness produced by two sounds with a frequency difference.

[0073] As can be seen from the above, the sound quality quantitative evaluation device of this invention determines the degree of incoordination between two sounds based on their frequencies with a frequency difference, and calculates the degree of disharmony between the two sounds based on their sound pressure levels and degree of incoordination. This yields a quantitative index of incoordination that reflects the muddiness of the two sounds, thus achieving a quantitative evaluation of the muddiness of the sound.

[0074] Assuming that engine vibrations produce only two frequencies of sound during vehicle acceleration, the dissonance calculated by the calculation module would represent the engine noise dissonance level. However, engine noise actually includes noise of orders 0.5 to 16.0, and the dissonance of a single set of sounds cannot represent the engine noise dissonance level. Therefore, it is necessary to calculate the dissonance of any two frequencies from the multiple frequency noises obtained after extracting one type of noise every 0.5 orders, and then determine the engine noise dissonance level based on multiple dissonances. In other words, the calculation module can also be used to calculate the noise dissonance level of a target component based on multiple dissonances corresponding to multiple sets of sounds to be evaluated generated by the target component. The target component can be the engine.

[0075] Figure 2 This involves extracting one type of noise at every 0.5 orders, resulting in a combination of multiple noise orders. A total of 32 orders were extracted. These 32 noise orders can be combined pairwise to obtain... Group of sounds to be evaluated, such as Figure 2 n-region + c-region Figure 2 The dissonance of the sound groups to be evaluated in the middle n region is a target value of 55, and the sound pressure level corresponding to each order of noise is as follows: Figure 3 As shown, 496 degrees of disharmony can be calculated. The calculation module calculates the disharmony level and may include:

[0076]

[0077] D m To represent the level of disharmony, M is the number of sound groups to be evaluated. For the degree of disharmony, k0′=1, D n0 Given a value. D n0 The order difference is 0.5. Engines exhibit different levels of noise disharmony at different speeds; the noise disharmony level at each speed can be calculated by changing the engine speed.

[0078] Based on the same inventive concept as the quantitative sound quality evaluation method described above, this embodiment of the invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of any of the methods described above in the quantitative sound quality evaluation method.

[0079] The bus architecture (represented by a bus) can include any number of interconnected buses and bridges, linking various circuits including one or more processors (represented by a processor) and memory (represented by memory). The bus can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface between the bus and receivers and transmitters. Receivers and transmitters can be the same element, a transceiver, providing a unit for communicating with various other devices over a transmission medium. The processor is responsible for managing the bus and general processing, while memory can be used to store data used by the processor during operation.

[0080] Since the electronic device described in this embodiment of the invention is the electronic device used to implement the quantitative sound quality evaluation method in this embodiment of the invention, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment of the invention based on the quantitative sound quality evaluation method described in this embodiment of the invention. Therefore, how the electronic device implements the method in this embodiment of the invention will not be described in detail here. Any electronic device used by those skilled in the art to implement the quantitative sound quality evaluation method in this embodiment of the invention falls within the scope of protection of this invention.

[0081] Based on the same inventive concept as the above-mentioned quantitative sound quality evaluation method, the present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements any of the above-mentioned quantitative sound quality evaluation methods.

[0082] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0083] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0084] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0085] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0086] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0087] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for quantitatively evaluating sound quality, characterized in that, include: Acquire the first frequency and first sound pressure level of the first sound in the group of sounds to be evaluated, and the second frequency and second sound pressure level of the second sound, wherein the first frequency is less than the second frequency; The degree of incoordination between the first sound and the second sound is determined based on the first frequency and the second frequency; The degree of disharmony between the first sound and the second sound is calculated based on the first sound pressure level, the second sound pressure level, and the degree of disharmony. Determining the degree of incoordination between the first sound and the second sound based on the first frequency and the second frequency includes: If the second frequency is greater than twice the first frequency, then the degree of incoordination is determined to be the target setpoint. If the second frequency is not greater than twice the first frequency, then the target frequency is calculated based on the first frequency and the first sound pressure level. If the frequency difference between the second frequency and the first frequency is not greater than the target frequency, then the first frequency, the second frequency, and the target frequency are substituted into the first formula to calculate the degree of incoordination. If the frequency difference is greater than the target frequency, then the first frequency, the second frequency, and the target frequency are substituted into the second formula to calculate the degree of incoordination. The first formula is: ； ； For the aforementioned degree of incoordination, For the first frequency, For the second frequency, The target frequency, =1, =55; The second formula is: ； For the aforementioned degree of incoordination, For the first frequency, For the second frequency, The target frequency, =1, =55; The calculation of the dissonance between the first sound and the second sound based on the first sound pressure level, the second sound pressure level, and the dissonance includes: ； ， ， For the degree of inharmony, For the aforementioned degree of incoordination, The first sound pressure level, This is the second sound pressure level. .

2. The method for quantitative evaluation of sound quality as described in claim 1, characterized in that, After calculating the degree of dissonance between the first sound and the second sound based on the first sound pressure level, the second sound pressure level, and the degree of dissonance, the method further includes: The disharmony level of the target component noise is calculated based on the disharmony levels corresponding to the multiple sets of sounds to be evaluated generated by the target component.

3. The method for quantitative evaluation of sound quality as described in claim 2, characterized in that, The step of calculating the dissonance level of the target component noise based on the multiple dissonances corresponding to the multiple sets of sounds to be evaluated generated by the target component includes: ； For the aforementioned level of disharmony, The number of sound groups to be evaluated. For the degree of inharmony, =1, For a given value.

4. A device for quantitatively evaluating sound quality, characterized in that, include: The acquisition module is used to acquire the first frequency and first sound pressure level of the first sound in the sound group to be evaluated, and the second frequency and second sound pressure level of the second sound, wherein the first frequency is less than the second frequency; A determining module is configured to determine the degree of incoordination between the first sound and the second sound based on the first frequency and the second frequency; The determining module is further configured to determine the degree of incoordination as a target setpoint if the second frequency is greater than twice the first frequency; If the second frequency is not greater than twice the first frequency, then the target frequency is calculated based on the first frequency and the first sound pressure level. If the frequency difference between the second frequency and the first frequency is not greater than the target frequency, then the first frequency, the second frequency, and the target frequency are substituted into the first formula to calculate the degree of incoordination. If the frequency difference is greater than the target frequency, then the first frequency, the second frequency, and the target frequency are substituted into the second formula to calculate the degree of incoordination. The first formula is: ； ； For the aforementioned degree of incoordination, For the first frequency, For the second frequency, The target frequency, =1, =55; The second formula is: ； For the aforementioned degree of incoordination, For the first frequency, For the second frequency, The target frequency, =1, =55; The calculation module is used to calculate the degree of dissonance between the first sound and the second sound based on the first sound pressure level, the second sound pressure level, and the degree of dissonance; The calculation module is further configured to calculate the dissonance between the first sound and the second sound based on the first sound pressure level, the second sound pressure level, and the dissonance, including: ； ， ， For the degree of inharmony, For the aforementioned degree of incoordination, The first sound pressure level, This is the second sound pressure level. .

5. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the quantitative sound quality evaluation method according to any one of claims 1-3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the quantitative sound quality evaluation method according to any one of claims 1-3.

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