Sound quality evaluation method, device and equipment for low-speed warning tone of new energy vehicle and medium

Abstract

The invention discloses a sound quality evaluation method, device and equipment for a low-speed warning tone of a new energy vehicle and a medium, and belongs to the technical field of new energy vehicles. The sound quality evaluation method for the low-speed warning tone of the new energy vehicle comprises the steps that in the process that a to-be-tested vehicle runs along a preset route in a test road according to a plurality of preset vehicle speeds, audio data of the low-speed warning tone outside the to-be-tested vehicle are collected; based on the audio data corresponding to each preset vehicle speed, determining a comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language definition of the vehicle low-speed prompt tone; the sound quality comprehensive score of the vehicle low-speed warning tone is determined in combination with the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language definition, limitation of single-dimension evaluation is avoided, evaluation of the sound quality of the vehicle low-speed warning tone from multiple dimensions is achieved, meanwhile, mechanical vibration noise analysis software is combined, and the evaluation accuracy of the vehicle low-speed warning tone is improved. Finally, the evaluation result of the sound quality of the low-speed prompt sound is quantified.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and in particular to a method, device, equipment and computer-readable storage medium for evaluating the sound quality of a low-speed warning sound of a new energy vehicle. Background Art

[0002] When new energy vehicles are driving at low speeds, the noise outside the vehicle is relatively low, and other road users such as pedestrians and non-motor vehicle riders are not easy to detect, which poses a safety hazard. Therefore, relevant official standards stipulate that new energy vehicles need to make appropriate warning sounds when driving at low speeds, that is, low-speed warning sounds. However, for people outside the vehicle, the low-speed warning sound is a high-frequency sharp sound, which will cause discomfort. In the related technology, the evaluation method of each OEM for the sound quality of the low-speed warning sound outside the vehicle is to have testers conduct subjective evaluation of the low-speed warning sound. However, the evaluation dimension of this evaluation method is relatively single, and different testers will output different evaluation results, and it is impossible to quantify the evaluation results of the sound quality of the external low-speed warning sound. Summary of the invention

[0003] The present application provides a sound quality evaluation method, device, equipment and computer-readable storage medium for the low-speed warning sound of new energy vehicles, which can solve the technical problems existing in the prior art, such as a single evaluation dimension, different testers will output different evaluation results, and the evaluation results cannot be quantified.

[0004] In a first aspect, an embodiment of the present application provides a method for evaluating the sound quality of a low-speed warning sound of a new energy vehicle, and the method for evaluating the sound quality of a low-speed warning sound of a new energy vehicle comprises:

[0005] While the vehicle to be tested is traveling along a preset route in the test road at a plurality of preset vehicle speeds, collecting audio data of a low-speed warning sound external to the vehicle to be tested;

[0006] Determine the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle low speed warning sound based on the audio data corresponding to each preset vehicle speed;

[0007] The comprehensive sound quality score of the vehicle low-speed warning sound is determined by combining the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity.

[0008] In combination with the first aspect, in one implementation, collecting audio data of a low-speed warning sound outside the vehicle to be tested includes:

[0009] Two sound sensors are used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The two sound sensors are symmetrically arranged on both sides of the test road. The preset line is the center line of the test road. The vehicle to be tested travels in one direction along the center line of the test road at a preset vehicle speed.

[0010] In combination with the first aspect, in one implementation, collecting audio data of the low-speed warning sound outside the vehicle to be tested includes:

[0011] A sound sensor is used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The sound sensor is arranged on one side of the test road. The vehicle to be tested drives in one direction along a preset route at a preset vehicle speed, then turns around and drives in the opposite direction along the preset route.

[0012] In combination with the first aspect, in one implementation, determining the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle low speed warning sound based on the audio data corresponding to each preset vehicle speed includes:

[0013] Importing the audio data corresponding to each preset vehicle speed into the mechanical vibration noise analysis software to determine the sound pressure level, loudness, sharpness and language clarity of the audio data corresponding to each preset vehicle speed;

[0014] The sound pressure levels of the audio data corresponding to each preset vehicle speed are weighted and summed to obtain the comprehensive sound pressure level of the vehicle low speed warning sound;

[0015] The loudness of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive loudness of the vehicle low speed warning sound;

[0016] The sharpness of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive sharpness of the vehicle low-speed warning sound;

[0017] The language intelligibility of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive language intelligibility of the vehicle low-speed warning sound.

[0018] In combination with the first aspect, in one implementation, the combining the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity to determine the comprehensive sound quality score of the vehicle low speed warning sound includes:

[0019] The comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity are weighted and summed to obtain a comprehensive sound quality score of the vehicle low-speed warning sound.

[0020] In a second aspect, an embodiment of the present application provides a sound quality evaluation device for a low-speed warning sound of a new energy vehicle, and the sound quality evaluation device for a low-speed warning sound of a new energy vehicle comprises:

[0021] A collection module, used to collect audio data of a low-speed warning sound outside the vehicle under test when the vehicle under test is traveling along a preset route in the test road at a plurality of preset vehicle speeds;

[0022] A first determination module is used to determine the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle low speed warning sound based on the audio data corresponding to each preset vehicle speed;

[0023] The second determination module is used to determine a comprehensive sound quality score of the vehicle low-speed warning sound by combining the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity.

[0024] In conjunction with the second aspect, in one implementation, the acquisition module is specifically used to:

[0025] Two sound sensors are used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The two sound sensors are symmetrically arranged on both sides of the test road. The preset line is the center line of the test road. The vehicle to be tested travels in one direction along the center line of the test road at a preset vehicle speed.

[0026] In conjunction with the second aspect, in one implementation, the acquisition module is specifically used to:

[0027] A sound sensor is used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The sound sensor is arranged on one side of the test road. The vehicle to be tested drives in one direction along a preset route at a preset vehicle speed, then turns around and drives in the opposite direction along the preset route.

[0028] In a third aspect, an embodiment of the present application provides a sound quality evaluation device for a low-speed warning sound of a new energy vehicle, wherein the sound quality evaluation device for a low-speed warning sound of a new energy vehicle comprises a processor, a memory, and a sound quality evaluation program for a low-speed warning sound of a new energy vehicle stored on the memory and executable by the processor, wherein when the sound quality evaluation program for a low-speed warning sound of a new energy vehicle is executed by the processor, the steps of the sound quality evaluation method for a low-speed warning sound of a new energy vehicle as described in any one of the first aspects are implemented.

[0029] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, characterized in that a sound quality evaluation program for the low-speed warning sound of a new energy vehicle is stored on the computer-readable storage medium, wherein when the sound quality evaluation program for the low-speed warning sound of a new energy vehicle is executed by a processor, the steps of the sound quality evaluation method for the low-speed warning sound of a new energy vehicle as described in any one of the first aspects are implemented.

[0030] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0031] The method collects audio data of a low-speed warning sound outside the vehicle to be tested while the vehicle to be tested is traveling along a preset route in a test road at several preset vehicle speeds; determines the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle's low-speed warning sound based on the audio data corresponding to each preset vehicle speed; and determines a comprehensive sound quality score of the vehicle's low-speed warning sound in combination with the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity, thereby avoiding the limitation of a single-dimensional evaluation and achieving the evaluation of the sound quality of the low-speed warning sound outside the vehicle from multiple dimensions. At the same time, combined with mechanical vibration noise analysis software, the evaluation result of the sound quality of the low-speed warning sound is finally quantified. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a flow chart of the first embodiment of the sound quality evaluation method for the low-speed warning tone of new energy vehicles of the present application;

[0033] Figure 2 This is a functional module diagram of an embodiment of a sound quality evaluation device for low-speed warning sound of new energy vehicles of the present application;

[0034] Figure 3 This is a schematic diagram of the hardware structure of the sound quality evaluation equipment for the low-speed warning sound of new energy vehicles involved in the embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0037] In a first aspect, an embodiment of the present application provides a method for evaluating the sound quality of a low-speed warning sound of a new energy vehicle.

[0038] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the method for evaluating the sound quality of low-speed warning sound of new energy vehicles in this application. Figure 1 As shown in the figure, the sound quality evaluation method of the low-speed warning sound of new energy vehicles includes:

[0039] Step 110, while the vehicle to be tested is traveling along a preset route in the test road at a plurality of preset vehicle speeds, collecting audio data of a low-speed warning sound outside the vehicle to be tested;

[0040] Among them, the test road selects a long straight road, and the test environment noise is less than the sound pressure level threshold, such as: 45dB(A). dB(A) refers to the decibel (A) weighted sound unit. The "A" here represents a specific frequency weighting method, which can more accurately simulate the human ear's perception of sounds of different frequencies. Because the human auditory system does not respond uniformly to frequency, using decibels (A) is closer to the actual experience of the human ear. The units of sound pressure level in this application are all dB(A).

[0041] The preset vehicle speed includes but is not limited to 10km / h, 15km / h, and 20km / h, and this application does not make any specific limitation on this.

[0042] During specific implementation, the vehicle to be tested is controlled to travel at a constant speed along the preset route in the test road at preset vehicle speeds such as 10km / h, 15km / h, and 20km / h. During the uniform driving of the vehicle to be tested, the audio data of the low-speed warning sound outside the vehicle to be tested is collected by the sound sensor arranged on the side of the test road. Preferably, the acquisition bandwidth of the sound sensor is greater than 20000Hz. The Y-direction deviation of the vehicle to be tested does not exceed 20cm during the driving of the preset route in the test road. In order to improve the accuracy of the evaluation results, the number of times the vehicle to be tested travels at a constant speed along the preset route at each preset vehicle speed can be controlled to be not less than 3 times, and accordingly, at least 3 groups of audio data corresponding to each preset vehicle speed are collected.

[0043] It is understandable that during driving, the closer the vehicle to be tested is to the sound sensor, the higher the sound pressure level. Therefore, the collected audio data needs to cover the maximum sound pressure level and the preset time domain lengths before and after the time point when the maximum value occurs. The preset time domain length can be 2.5s, and the test duration must not be less than 5s.

[0044] Step 120: Determine the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle low speed warning sound based on the audio data corresponding to each preset vehicle speed;

[0045] Furthermore, the audio data corresponding to each preset vehicle speed is respectively imported into mechanical vibration and noise analysis software such as test lab, so that the sound pressure level, loudness, sharpness and language clarity of the audio data corresponding to each preset vehicle speed can be quantified; then, based on the sound pressure level of the audio data corresponding to each preset vehicle speed after quantification, the specific value of the comprehensive sound pressure level of the vehicle low-speed warning sound is determined; based on the loudness of the audio data corresponding to each preset vehicle speed after quantification, the specific value of the comprehensive loudness of the vehicle low-speed warning sound is determined; based on the sharpness of the audio data corresponding to each preset vehicle speed after quantification, the specific value of the comprehensive sharpness of the vehicle low-speed warning sound is determined; based on the language clarity of the audio data corresponding to each preset vehicle speed after quantification, the specific value of the comprehensive language clarity of the vehicle low-speed warning sound is determined.

[0046] Step 130: Determine a comprehensive sound quality score of the vehicle low-speed warning sound by combining the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness, and the comprehensive language clarity.

[0047] Furthermore, the comprehensive sound quality score of the vehicle low-speed warning sound is determined from multiple dimensions in combination with the specific values ​​of the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity.

[0048] In this embodiment, by collecting audio data of the low-speed warning sound outside the vehicle to be tested while the vehicle to be tested is traveling along a preset route in a test road at several preset vehicle speeds; determining the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle's low-speed warning sound based on the audio data corresponding to each preset vehicle speed; and determining the comprehensive sound quality score of the vehicle's low-speed warning sound in combination with the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity, thereby avoiding the limitations of single-dimensional evaluation, and achieving evaluation of the sound quality of the low-speed warning sound outside the vehicle from multiple dimensions. At the same time, combined with mechanical vibration noise analysis software, the evaluation results of the sound quality of the low-speed warning sound are finally quantified.

[0049] Furthermore, in one embodiment, the step of collecting audio data of a low-speed warning sound outside the vehicle to be tested includes:

[0050] Two sound sensors are used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The two sound sensors are symmetrically arranged on both sides of the test road. The preset line is the center line of the test road. The vehicle to be tested travels in one direction along the center line of the test road at a preset vehicle speed.

[0051] Preferably, two sound sensors are symmetrically arranged on both sides of the test road, 2 meters away from the center line of the test road, and 1.2 meters high. The Y-direction deviation of the vehicle to be tested does not exceed 20 cm when driving along the center line of the test road.

[0052] During specific implementation, two sound sensors synchronously collect audio data of the low-speed warning sound on the left and right sides of the vehicle to be tested.

[0053] In this embodiment, based on the official standard, the test process is optimized, the feasibility of the test is increased, the test time is short, and the test efficiency is high.

[0054] Furthermore, in one embodiment, the step of collecting audio data of the low-speed warning sound outside the vehicle to be tested includes:

[0055] A sound sensor is used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The sound sensor is arranged on one side of the test road. The vehicle to be tested drives in one direction along a preset route at a preset vehicle speed, then turns around and drives in the opposite direction along the preset route.

[0056] If it is not possible to arrange a sound sensor on each side of the test road, you can only use the sound sensor arranged on one side of the test road to collect audio data, perform a round-trip test without moving the sound sensor, and then take the average value of the round-trip time domain data as a set of data.

[0057] In this embodiment, based on the official standard, the test process is optimized, the feasibility of the test is increased, and the test process only requires one sound sensor, so the test cost is low.

[0058] Further, in one embodiment, the determining of the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle low speed warning sound based on the audio data corresponding to each preset vehicle speed includes:

[0059] Step 210: import the audio data corresponding to each preset vehicle speed into the mechanical vibration noise analysis software to determine the sound pressure level, loudness, sharpness and language clarity of the audio data corresponding to each preset vehicle speed;

[0060] In specific implementation, the audio data corresponding to each preset vehicle speed is respectively imported into the mechanical vibration noise analysis software, and the sound pressure level processing is first performed, the resolution is set to 8Hz, the maximum value in the time domain is taken, and A weighting is performed to determine the sound pressure level of the audio data corresponding to each preset vehicle speed; then the loudness processing is performed, the resolution is set to 5Hz, the maximum value in the time domain is taken, and the loudness of the audio data corresponding to each preset vehicle speed is determined; then the sharpness processing is performed, the resolution is set to 5Hz, the maximum value in the time domain is taken, and the sharpness of the audio data corresponding to each preset vehicle speed is determined; finally, the language clarity processing is performed, the resolution is set to 5Hz, the minimum value in the time domain is taken, and the language clarity of the audio data corresponding to each preset vehicle speed is determined. Among them, the unit of sound pressure level is dB(A), the unit of loudness is sone, the unit of sharpness is acum, and the unit of language clarity is %AI.

[0061] Step 220, weighting and summing the sound pressure levels of the audio data corresponding to each preset vehicle speed to obtain a comprehensive sound pressure level of the vehicle low speed warning sound;

[0062] It should be noted that when the vehicle speed is 10kph, the sound pressure level is lower than 52, or when the vehicle speed is 15kph, the sound pressure level is lower than 55, or when the vehicle speed is 20kph, the sound pressure level is lower than 58 low-speed warning sound will not have a good warning effect.

[0063] In specific implementation, assuming that the preset vehicle speeds are 10kph, 15kph and 20kph, the sound pressure level of the audio data corresponding to the preset vehicle speed of 10kph is X1, the sound pressure level of the audio data corresponding to the preset vehicle speed of 15kph is Y1, and the sound pressure level of the audio data corresponding to the preset vehicle speed of 20kph is Z1.

[0064] <![CDATA[10kph sound pressure level X 1 > Score evaluate <![CDATA[52≤X 1 ≤55]]> 5 excellent <![CDATA[55<X 1 ≤58]]> 4 good <![CDATA[58<X 1 ≤61]]> 3 Acceptable <![CDATA[61<X 1 ≤64]]> 2 not good <![CDATA[X 1 >64]]> 1 Very bad

[0065] <![CDATA[Sound pressure level Y at 15 kph 1 > Score evaluate <![CDATA[55≤Y 1 ≤58]]> 5 excellent <![CDATA[58<Y 1 ≤61]]> 4 good <![CDATA[61<Y 1 ≤64]]> 3 Acceptable <![CDATA[64<Y 1 ≤67]]> 2 not good <![CDATA[Y 1 >67]]> 1 Very bad

[0066] <![CDATA[20kph sound pressure level Z 1 > Score evaluate <![CDATA[58≤Z 1 ≤61]]> 5 excellent <![CDATA[61<Z 1 ≤64]]> 4 good <![CDATA[64<Z 1 ≤67]]> 3 Acceptable <![CDATA[67<Z 1 ≤70]]> 2 not good <![CDATA[Z 1 >70]]> 1 Very bad

[0067]

[0068] The sound pressure level of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive sound pressure level A of the vehicle low speed warning sound, and the corresponding formula is: A = a*X1+b*Y1+c*Z1, where a, b, and c are weighting coefficients, and their values ​​can be flexibly adjusted according to actual needs, and this application does not make specific restrictions on this. Preferably, a is 0.5, b is 0.3, and c is 0.2.

[0069] Step 230, weighting and summing the loudness of the audio data corresponding to each preset vehicle speed to obtain the comprehensive loudness of the vehicle low speed warning sound;

[0070] In specific implementation, assuming that the preset vehicle speeds are 10kph, 15kph and 20kph, the loudness of the audio data corresponding to the preset vehicle speed of 10kph is X2, the loudness of the audio data corresponding to the preset vehicle speed of 15kph is Y2, and the loudness of the audio data corresponding to the preset vehicle speed of 20kph is Z2.

[0071] 10kph loudness Score evaluate <![CDATA[X 2 ≤12]]> 5 excellent <![CDATA[12<X 2 ≤13]]> 4 good <![CDATA[13<X 2 ≤14]]> 3 Acceptable <![CDATA[14<X 2 ≤15]]> 2 not good <![CDATA[X 2 >15]]> 1 Very bad

[0072] <![CDATA[15kph loudness Y 2 > Score evaluate <![CDATA[Y 2 ≤13]]> 5 excellent <![CDATA[13<Y 2 ≤61]]> 4 good <![CDATA[14<Y 2 ≤64]]> 3 Acceptable <![CDATA[15<Y 2 ≤67]]> 2 not good <![CDATA[Y 2 >16]]> 1 Very bad

[0073] <![CDATA[20kph Loudness Z 2 > Score evaluate <![CDATA[Z 2 ≤14]]> 5 excellent <![CDATA[14<Z 2 ≤15]]> 4 good <![CDATA[15<Z 2 ≤16]]> 3 Acceptable <![CDATA[16<Z 2 ≤17]]> 2 not good <![CDATA[Z 2 >17]]> 1 Very bad

[0074]

[0075] The loudness of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive loudness B of the vehicle low speed warning sound, and the corresponding formula is: B = d*X2+e*Y2+f*Z2, where d, e, and f are weighting coefficients, and their values ​​can be flexibly adjusted according to actual needs, and this application does not make specific restrictions on this. Preferably, d is 0.5, e is 0.3, and f is 0.2.

[0076] Step 240, weighting and summing the sharpness of the audio data corresponding to each preset vehicle speed to obtain the comprehensive sharpness of the vehicle low speed warning sound;

[0077] In the specific implementation, assuming that the preset vehicle speeds are 10kph, 15kph and 20kph, the sharpness of the audio data corresponding to the preset vehicle speed of 10kph is X3, the sharpness of the audio data corresponding to the preset vehicle speed of 15kph is Y3, and the sharpness of the audio data corresponding to the preset vehicle speed of 20kph is Z3.

[0078] 10kph sharpness Score evaluate <![CDATA[X 3 ≤1.45]]> 5 excellent <![CDATA[1.45<X 3 ≤1.5]]> 4 good <![CDATA[1.5<X 3 ≤1.55]]> 3 Acceptable <![CDATA[1.55<X 3 ≤1.6]]> 2 not good <![CDATA[X 3 >1.6]]> 1 Very bad

[0079] 15kph sharpness Score evaluate <![CDATA[Y 3 ≤1.5]]> 5 excellent <![CDATA[1.5<Y 3 ≤1.55]]> 4 good <![CDATA[1.55<Y 3 ≤1.6]]> 3 Acceptable <![CDATA[1.6<Y 3 ≤1.65]]> 2 not good <![CDATA[Y 3 >1.65]]> 1 Very bad

[0080]

[0081]

[0082] The sharpness of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive sharpness C of the vehicle low speed warning sound, and the corresponding formula is: C = g*X3+h*Y3+i*Z3, where g, h, and i are weighting coefficients, and their values ​​can be flexibly adjusted according to actual needs, and this application does not make specific restrictions on this. Preferably, g is 0.5, h is 0.3, and i is 0.2.

[0083] Step 250 , weighting and summing the language intelligibility of the audio data corresponding to each preset vehicle speed to obtain the comprehensive language intelligibility of the vehicle low-speed warning sound.

[0084] In specific implementation, assuming that the preset vehicle speeds are 10kph, 15kph and 20kph, the language clarity of the audio data corresponding to the preset vehicle speed of 10kph is X4, the language clarity of the audio data corresponding to the preset vehicle speed of 15kph is Y4, and the language clarity of the audio data corresponding to the preset vehicle speed of 20kph is Z4.

[0085] 10kph speech clarity Score evaluate <![CDATA[X 4 ≥90]]> 5 excellent <![CDATA[85<X 4 ≤90]]> 4 good <![CDATA[80<X 4 ≤85]]> 3 Acceptable <![CDATA[75<X 4 ≤80]]> 2 not good <![CDATA[X 4 <75]]> 1 Very bad

[0086] 15kph speech clarity Score evaluate <![CDATA[Y 4 ≥85]]> 5 excellent <![CDATA[80<Y 4 ≤85]]> 4 good <![CDATA[75<Y 4 ≤80]]> 3 Acceptable <![CDATA[70<Y 4 ≤75]]> 2 not good <![CDATA[Y 4 <70]]> 1 Very bad

[0087]

[0088]

[0089] The language clarity of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive language clarity D of the vehicle low-speed warning sound, and the corresponding formula is: D = j*X4+k*Y4+l*Z4, where j, k, and l are weighting coefficients, and their values ​​can be flexibly adjusted according to actual needs, and this application does not make specific restrictions on this. Preferably, j is 0.5, k is 0.3, and l is 0.2.

[0090] In this embodiment, the audio data corresponding to each preset vehicle speed is given, which specifically shows how to determine the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle low-speed warning sound, laying the foundation for calculating the comprehensive sound quality score of the vehicle low-speed warning sound.

[0091] Further, in one embodiment, the combining the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity to determine the comprehensive sound quality score of the vehicle low speed warning sound includes:

[0092] The comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity are weighted and summed to obtain a comprehensive sound quality score of the vehicle low-speed warning sound.

[0093] In specific implementation, after determining the comprehensive sound pressure level A, the comprehensive loudness B, the comprehensive sharpness C and the comprehensive language clarity D, the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity are weighted and summed to obtain the comprehensive sound quality score P of the vehicle low-speed warning sound, and the corresponding formula is: P = m*A+n*B+q*C+r*D, where m, n, q, and r are weighting coefficients, and their values ​​can be flexibly adjusted according to actual needs, and this application does not make specific restrictions on this. Preferably, m is 0.3, n is 0.3, q is 0.2, and r is 0.2.

[0094] In this embodiment, how to determine the comprehensive sound quality score of the vehicle low-speed warning sound in combination with the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity is given, and the evaluation results of the sound quality of the low-speed warning sound are quantified.

[0095] In a second aspect, an embodiment of the present application also provides a sound quality evaluation device for a low-speed warning sound of a new energy vehicle.

[0096] In one embodiment, referring to Figure 2 , Figure 2 This is a functional module diagram of an embodiment of a sound quality evaluation device for low-speed warning sound of new energy vehicles in this application. Figure 2 As shown, the sound quality evaluation device 200 for the low-speed warning sound of a new energy vehicle includes:

[0097] The acquisition module 201 is used to collect audio data of the low-speed warning sound outside the vehicle under test when the vehicle under test is traveling along a preset route in the test road at a plurality of preset vehicle speeds;

[0098] A first determination module 202 is used to determine the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle low speed warning sound based on the audio data corresponding to each preset vehicle speed;

[0099] The second determination module 203 is used to determine a comprehensive sound quality score of the vehicle low speed warning sound by combining the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity.

[0100] Furthermore, in one embodiment, the acquisition module is specifically used for:

[0101] Two sound sensors are used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The two sound sensors are symmetrically arranged on both sides of the test road. The preset line is the center line of the test road. The vehicle to be tested travels in one direction along the center line of the test road at a preset vehicle speed.

[0102] Furthermore, in one embodiment, the acquisition module is specifically used for:

[0103] A sound sensor is used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The sound sensor is arranged on one side of the test road. The vehicle to be tested drives in one direction along a preset route at a preset vehicle speed, then turns around and drives in the opposite direction along the preset route.

[0104] Further, in one embodiment, the first determining module is specifically configured to:

[0105] Importing the audio data corresponding to each preset vehicle speed into the mechanical vibration noise analysis software to determine the sound pressure level, loudness, sharpness and language clarity of the audio data corresponding to each preset vehicle speed;

[0106] The sound pressure levels of the audio data corresponding to each preset vehicle speed are weighted and summed to obtain the comprehensive sound pressure level of the vehicle low speed warning sound;

[0107] The loudness of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive loudness of the vehicle low speed warning sound;

[0108] The sharpness of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive sharpness of the vehicle low-speed warning sound;

[0109] The language intelligibility of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive language intelligibility of the vehicle low-speed warning sound.

[0110] Further, in one embodiment, the second determining module is specifically configured to:

[0111] The comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity are weighted and summed to obtain a comprehensive sound quality score of the vehicle low-speed warning sound.

[0112] Among them, the functional implementation of each module in the above-mentioned sound quality evaluation device for the low-speed warning sound of new energy vehicles corresponds to the various steps in the above-mentioned sound quality evaluation method for the low-speed warning sound of new energy vehicles. Its functions and implementation processes will not be repeated here one by one.

[0113] On the third aspect, an embodiment of the present application provides a sound quality evaluation device for the low-speed warning sound of a new energy vehicle. The sound quality evaluation device for the low-speed warning sound of a new energy vehicle can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0114] Reference Figure 3 , Figure 3The hardware structure diagram of the sound quality evaluation device for the low-speed warning sound of new energy vehicles involved in the embodiment of the present application is shown in FIG. In the embodiment of the present application, the sound quality evaluation device for the low-speed warning sound of new energy vehicles may include a processor, a memory, a communication interface, and a communication bus.

[0115] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0116] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the sound quality evaluation device for low-speed warning sound of new energy vehicles, and the interface used to realize the interconnection of the sound quality evaluation device for low-speed warning sound of new energy vehicles with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display (Display), a keyboard (Keyboard), etc.

[0117] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0118] The processor may be a general-purpose processor, which may call the sound quality evaluation program of the low-speed prompt tone of new energy vehicles stored in the memory, and execute the sound quality evaluation method of the low-speed prompt tone of new energy vehicles provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). Among them, the method executed when the sound quality evaluation program of the low-speed prompt tone of new energy vehicles is called may refer to the various embodiments of the sound quality evaluation method of the low-speed prompt tone of new energy vehicles of the present application, which will not be repeated here.

[0119] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0120] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0121] The computer-readable storage medium of the present application stores a sound quality evaluation program for the low-speed warning sound of new energy vehicles, wherein when the sound quality evaluation program for the low-speed warning sound of new energy vehicles is executed by a processor, the steps of the sound quality evaluation method for the low-speed warning sound of new energy vehicles as described above are implemented.

[0122] Among them, the method implemented when the sound quality evaluation program of the low-speed warning sound of new energy vehicles is executed can refer to the various embodiments of the sound quality evaluation method of the low-speed warning sound of new energy vehicles in this application, and will not be repeated here.

[0123] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0124] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0125] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0126] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0127] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0128] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0129] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for evaluating the sound quality of a low-speed warning tone of a new energy vehicle, characterized in that: The sound quality evaluation method of the low-speed warning sound of the new energy vehicle includes: While the vehicle to be tested is traveling along a preset route in the test road at a plurality of preset vehicle speeds, collecting audio data of a low-speed warning sound external to the vehicle to be tested; Determine the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle low speed warning sound based on the audio data corresponding to each preset vehicle speed; The comprehensive sound quality score of the vehicle low-speed warning sound is determined by combining the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity.

2. The sound quality evaluation method of the low-speed warning sound of a new energy vehicle according to claim 1, characterized in that: The step of collecting audio data of the low-speed warning sound outside the vehicle to be tested includes: Two sound sensors are used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The two sound sensors are symmetrically arranged on both sides of the test road. The preset line is the center line of the test road. The vehicle to be tested travels in one direction along the center line of the test road at a preset vehicle speed.

3. The sound quality evaluation method of the low-speed warning sound of a new energy vehicle according to claim 1, characterized in that: The step of collecting audio data of the low-speed warning sound outside the vehicle to be tested includes: A sound sensor is used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The sound sensor is arranged on one side of the test road. The vehicle to be tested drives in one direction along a preset route at a preset vehicle speed, then turns around and drives in the opposite direction along the preset route.

4. The sound quality evaluation method of the low-speed warning sound of a new energy vehicle according to claim 1, characterized in that: The method of determining the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle low speed warning sound based on the audio data corresponding to each preset vehicle speed includes: Importing the audio data corresponding to each preset vehicle speed into the mechanical vibration noise analysis software to determine the sound pressure level, loudness, sharpness and language clarity of the audio data corresponding to each preset vehicle speed; The sound pressure levels of the audio data corresponding to each preset vehicle speed are weighted and summed to obtain the comprehensive sound pressure level of the vehicle low speed warning sound; The loudness of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive loudness of the vehicle low speed warning sound; The sharpness of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive sharpness of the vehicle low-speed warning sound; The language intelligibility of the audio data corresponding to each preset vehicle speed is weighted and summed to obtain the comprehensive language intelligibility of the vehicle low-speed warning sound.

5. The sound quality evaluation method of the low-speed warning sound of a new energy vehicle according to claim 1, characterized in that: The combining the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity to determine the comprehensive sound quality score of the vehicle low speed warning sound includes: The comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity are weighted and summed to obtain a comprehensive sound quality score of the vehicle low-speed warning sound.

6. A sound quality evaluation device for low-speed warning sound of new energy vehicles, characterized in that: The sound quality evaluation device for the low-speed warning sound of the new energy vehicle comprises: A collection module, used to collect audio data of a low-speed warning sound outside the vehicle under test when the vehicle under test is traveling along a preset route in the test road at a plurality of preset vehicle speeds; A first determination module is used to determine the comprehensive sound pressure level, comprehensive loudness, comprehensive sharpness and comprehensive language clarity of the vehicle low speed warning sound based on the audio data corresponding to each preset vehicle speed; The second determination module is used to determine a comprehensive sound quality score of the vehicle low-speed warning sound by combining the comprehensive sound pressure level, the comprehensive loudness, the comprehensive sharpness and the comprehensive language clarity.

7. The sound quality evaluation device for the low-speed warning sound of a new energy vehicle as claimed in claim 6, characterized in that: The acquisition module is specifically used for: Two sound sensors are used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The two sound sensors are symmetrically arranged on both sides of the test road. The preset line is the center line of the test road. The vehicle to be tested travels in one direction along the center line of the test road at a preset vehicle speed.

8. The sound quality evaluation device for the low-speed warning sound of a new energy vehicle as claimed in claim 6, characterized in that: The acquisition module is specifically used for: A sound sensor is used to collect audio data of low-speed warning sounds on the left and right sides of the vehicle to be tested. The sound sensor is arranged on one side of the test road. The vehicle to be tested drives in one direction along a preset route at a preset vehicle speed, then turns around and drives in the opposite direction along the preset route.

9. A sound quality evaluation device for low-speed warning sound of new energy vehicles, characterized in that: The sound quality evaluation device for the low-speed warning sound of a new energy vehicle includes a processor, a memory, and a sound quality evaluation program for the low-speed warning sound of a new energy vehicle stored in the memory and executable by the processor. When the sound quality evaluation program for the low-speed warning sound of a new energy vehicle is executed by the processor, the steps of the sound quality evaluation method for the low-speed warning sound of a new energy vehicle as described in any one of claims 1 to 5 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a sound quality evaluation program for the low-speed warning sound of a new energy vehicle. When the sound quality evaluation program for the low-speed warning sound of a new energy vehicle is executed by a processor, the steps of the sound quality evaluation method for the low-speed warning sound of a new energy vehicle as described in any one of claims 1 to 5 are implemented.

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