A method for identifying the location of road noise sources

Abstract

The present invention provides a method for identifying the position of road noise sources, including: conducting a vehicle road noise test and a subjective evaluation test on a test vehicle on a test road to determine the road noise complaint conditions that cause mid- to high-frequency airborne noise, the frequency range in which the mid- to high-frequency airborne noise is distributed, and the complaint positions inside the passenger compartment; determining the noise attenuation amount from each tire of the test vehicle to the complaint positions inside the passenger compartment when the test vehicle is arranged in a semi-anechoic chamber, and determining the radiated sound of each tire of the test vehicle when the test vehicle is arranged in a anechoic test chamber with a drum; based on the noise attenuation amount and the radiated sound, determining the main transmission path with the largest noise contribution within the frequency range; in the anechoic test chamber with a drum, using a camera and a PU probe to identify the source distribution positions in the space between the target tire corresponding to the main transmission path and the target wheelhouse liner, and to identify the source distribution positions in the wheel arch and the area around the wheel arch of the target tire.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive NVH, and particularly relates to a method for identifying the position of road noise sources. Background Art

[0002] With the continuous progress of automotive technology and the rapid development of the automotive industry, automobiles have become an important part of people's daily lives. At the same time, people's requirements for automotive comfort are becoming more and more stringent, including requirements for comfort aspects such as quietness and low vibration. Among them, road noise, as an important evaluation index of NVH performance, is valued by customers and automobile manufacturers and has become an important factor affecting the overall vehicle quality. Compared with traditional vehicles, the interior noise of electric vehicles mainly comes from motor noise, road noise and wind noise. In urban driving conditions, vehicles often travel at low speeds. At low speeds (60 km / h), without the masking of engine noise, road noise is more prominent and contributes the most to the interior noise. The existing analysis of the airborne sound transmission path of road noise mainly evaluates the sound attenuation from the tire to the interior of the vehicle through anechoic chamber tests, which are mainly static tests and ignore the pattern noise and pumping noise generated by the friction between the tire and the ground during vehicle operation. At the same time, the front and rear wheels have different tire structures and patterns, resulting in different noises. In addition, the gravity borne by the four wheels is also different, resulting in different pumping noises generated when the tire moves relative to the ground. Therefore, without considering the differences in the noises generated by different wheels during vehicle operation, that is, the differences in sound sources, and only testing and analyzing from the acoustic packaging path, it is impossible to accurately evaluate the main transmission path of road noise complaints in the vehicle. At the same time, the existing sound source identification methods mainly use Beamforming tests in the operating state, which can only reflect the sound source position in the XZ plane diagram of the whole vehicle and are not conducive to the noise transmission test and analysis in the narrow three-dimensional space between the tire and the wheelhouse liner. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for identifying the position of road noise sources to improve road noise quality. By testing the contribution of the four tire transmission paths to the road noise of the whole vehicle during vehicle operation, the main transmission path of road noise is identified. Then, through a four-wheel drive drum test, the sound intensity method is used to detect the noise distribution in the three-dimensional space between the tire and the wheelhouse liner and in areas such as the wheel arch, carpet, trunk, and rear floor inside the vehicle, and the sound source positions in the frequency bands with poor road noise quality inside the vehicle are identified, providing a reference for the layout of acoustic materials required for improving medium and high-frequency road noise, and thus solving the problem of road noise airborne sound.

[0004] The technical solution of the present invention is as follows:

[0005] The present invention provides a method for identifying the position of road noise sources, including:

[0006] Step 1: Conduct a vehicle road noise test and a subjective evaluation test on the vehicle to be tested on a test road, and determine the road noise complaint conditions that cause mid- and high-frequency airborne noise, the frequency range in which the mid- and high-frequency airborne noise is distributed, and the complaint positions inside the passenger compartment.

[0007] Step 2: According to the road noise complaint conditions, the frequency range in which the mid- and high-frequency airborne noise is distributed, and the complaint positions inside the passenger compartment, determine the noise attenuation amount from each tire of the vehicle to be tested to the complaint positions inside the passenger compartment when the vehicle to be tested is arranged in an anechoic chamber, and determine the radiated sound of each tire of the vehicle to be tested when the vehicle to be tested is arranged in a reverberation chamber with a drum.

[0008] Step 3: Based on the noise attenuation amount from each tire of the vehicle to be tested to the complaint positions inside the passenger compartment and the radiated sound of each tire of the vehicle to be tested, determine the main transmission path with the largest noise contribution in the said frequency range.

[0009] Step 4: In a reverberation chamber with a drum, use a camera and a PU probe to identify the source distribution positions in the space between the target tire corresponding to the main transmission path and the target wheelhouse liner.

[0010] Step 5: In a reverberation chamber with a drum, use a camera and a PU probe to identify the source distribution positions in the wheelhouse and the areas around the wheelhouse of the target tire corresponding to the main transmission path.

[0011] Preferably, in Step 2, the steps for determining the noise attenuation amount from each tire of the vehicle to be tested to the complaint positions inside the passenger compartment when the vehicle to be tested is arranged in an anechoic chamber include:

[0012] Step 211: Arrange the vehicle to be tested in an anechoic chamber, arrange the sound source openings of the volume source at 4 positions at a predetermined distance from the first tire corresponding to the complaint position inside the passenger compartment, and arrange a microphone at the complaint position inside the passenger compartment.

[0013] Step 212: Turn on the volume source, perform energy averaging on the 4 sets of sound pressure levels corresponding to the 4 positions of the volume source at the first tire to obtain the average sound pressure level at the complaint position inside the passenger compartment.

[0014] Step 213: Calculate the noise attenuation amount from the first tire to the complaint position inside the passenger compartment according to the average sound pressure level at the complaint position inside the passenger compartment.

[0015] Step 214: Arrange the sound source openings of the volume source at 4 positions at a predetermined distance from the second tire of the vehicle to be tested, and turn on the volume source for the second tire to obtain the noise attenuation amount from the second tire to the complaint position inside the passenger compartment.

[0016] Step 215: Arrange the sound source openings of the volume sound source at 4 positions respectively at a predetermined distance from the third tire of the vehicle under test, and turn on the volume sound source for the third tire to obtain the noise attenuation amount from the third tire to the complaint position in the passenger compartment.

[0017] Step 216: Arrange the sound source openings of the volume sound source at 4 positions respectively at a predetermined distance from the fourth tire of the vehicle under test, and turn on the volume sound source for the fourth tire to obtain the noise attenuation amount from the fourth tire to the complaint position in the passenger compartment.

[0018] Preferably, in Step 2, the steps of determining the radiated sound of each tire of the vehicle under test when arranging the vehicle under test in the anechoic test chamber with a drum include:

[0019] Step 221: Arrange the vehicle under test in the anechoic chamber with a drum, and arrange 4 microphones at 4 positions respectively at a predetermined distance from the first tire corresponding to the complaint position in the passenger compartment.

[0020] Step 222: Set the running speed of the drum on the side where the complaint position in the passenger compartment is located to the speed corresponding to the road noise complaint condition, and run the drum on the side where the complaint position in the passenger compartment is located to obtain the radiated sound of the first tire.

[0021] Step 223: Arrange the vehicle under test in the anechoic chamber with a drum, and arrange 4 microphones at 4 positions respectively at a predetermined distance from the second tire.

[0022] Step 224: Set the running speed of the drum on the side where the second tire is located to the speed corresponding to the road noise complaint condition, and run the drum on the side where the second tire is located to obtain the radiated sound of the second tire.

[0023] Step 225: Arrange the vehicle under test in the anechoic chamber with a drum, and arrange 4 microphones at 4 positions respectively at a predetermined distance from the third tire.

[0024] Step 226: Set the running speed of the drum on the side where the third tire is located to the speed corresponding to the road noise complaint condition, and run the drum on the side where the third tire is located to obtain the radiated sound of the third tire.

[0025] Step 227: Arrange the vehicle under test in the anechoic chamber with a drum, and arrange 4 microphones at 4 positions respectively at a predetermined distance from the fourth tire.

[0026] Step 228: Set the running speed of the drum on the side where the fourth tire is located to the speed corresponding to the road noise complaint condition, and run the drum on the side where the fourth tire is located to obtain the radiated sound of the fourth tire.

[0027] Preferably, Step 3 includes:

[0028] Step 311: Subtract the noise attenuation from the first tire to the complaint position in the passenger compartment from the radiated noise of the first tire to obtain the noise contribution of the first tire to the complaint position in the passenger compartment; subtract the noise attenuation from the second tire to the complaint position in the passenger compartment from the radiated noise of the second tire to obtain the noise contribution of the second tire to the complaint position in the passenger compartment; subtract the noise attenuation from the third tire to the complaint position in the passenger compartment from the radiated noise of the third tire to obtain the noise contribution of the third tire to the complaint position in the passenger compartment; subtract the noise attenuation from the fourth tire to the complaint position in the passenger compartment from the radiated noise of the fourth tire to obtain the noise contribution of the fourth tire to the complaint position in the passenger compartment.

[0029] Step 312: Select the transfer path corresponding to the maximum median value among the noise contributions of the first tire to the complaint position in the passenger compartment, the second tire to the complaint position in the passenger compartment, the third tire to the complaint position in the passenger compartment, and the fourth tire to the complaint position in the passenger compartment as the main transfer path.

[0030] Preferably, the radiated noise of the first tire to the fourth tire is calculated by the formula:

[0031]

[0032] where is the radiated noise of the tire to be calculated, i is the i-th microphone arranged near the tire to be calculated, and p is the sound pressure level collected by the i-th microphone. i The beneficial effects of the present invention are as follows:

[0033] (1) It is possible to eliminate the test errors caused by different environments and wind speeds during road surface tests, more accurately identify the noise contributions of the four tires to the interior of the vehicle during vehicle operation, and thus determine the main transfer paths of road noise and airborne noise.

[0034] (2) By analyzing the source positions in different problem frequency ranges from both outside and inside the vehicle, it is possible to help design the noise reduction wheel well liner and the layout of interior acoustic materials in a targeted manner, and optimize the road noise quality problems of the entire vehicle. This not only improves the R & D efficiency but also avoids unnecessary addition of acoustic materials and increases in cost.

[0035] (2) By analyzing the source positions in different problem frequency ranges from both outside and inside the vehicle, it is possible to help design the noise reduction wheel well liner and the layout of interior acoustic materials in a targeted manner, and optimize the road noise quality problems of the entire vehicle. This not only improves the R & D efficiency but also avoids unnecessary addition of acoustic materials and increases in cost. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0037] Figure 1 It is a schematic diagram of the sound-to-sound transfer function test from the tire to the interior of the vehicle in a semi-anechoic chamber;

[0038] Figure 2 It is a front view of the placement of the sound source opening of a volume source.

[0039] Figure 3 Top view of the sound source opening of the volume sound source

[0040] Figure 4 Schematic diagram of the test of the radiated sound of the tire in the drum laboratory

[0041] Figure 5 Front view of the placement of the microphone for the radiated sound test

[0042] Figure 6 Top view of the placement of the microphone for the radiated sound test

[0043] Figure 7 Schematic diagram of the acoustic cavity probe

[0044] Figure 8 Schematic diagram of the method for identifying the sound source between the tire and the wheelhouse lining

[0045] Figure 9 Flow chart for identifying the weak points of the airborne sound transmission path of road noise

[0046] Figure 10 Distribution map of the sound source position at 600 - 1000 Hz

[0047] Figure 11 Sound intensity distribution map of the carpet at the driver's seat

[0048] Explanation of the reference numerals in the drawings

[0049] 1. Microphone; 2. Volume sound source; 3. Tire; 4. Sound source opening of the volume sound source; 5. Tire tread; 6. Drum; 7. Camera; 8. Field of view of the camera; 9. PU probe; 10. Moving direction of the PU probe from the outside to the inside of the tire vehicle; 11. Moving direction of the PU probe from front to back; 12. Starting point of the movement of the PU probe; 13. End point of the movement of the PU probe. Detailed implementation manners

[0050] As Figure 9 , the embodiment of the present invention provides a method for identifying the position of the road noise source, and the specific steps are as follows:

[0051] 1. Analysis of the contribution of the tire transmission path

[0052] Conduct a vehicle road noise test and subjective evaluation on the road to clarify the road noise complaint conditions, frequency range, and complaint positions in the passenger compartment (mainly including the driver, co - driver, left rear row, and right rear row positions) of the high - frequency airborne sound problem in road noise. For example, after testing, a certain tooling vehicle conducts a vehicle road noise test and subjective evaluation on the road. On a smooth asphalt road at 60 Km / h, there is obvious tire tread noise at the driver's position. After testing, it is found that the main frequency of the tire tread noise is 600 - 1000 Hz.

[0053] The following method is illustrated by taking the common road noise complaint condition of 60 Km / h and the driver's position complaining about the tire tread noise as an example.

[0054] 1). Calibrate the volume sound source. In an anechoic chamber, obtain the sound pressure level at a distance of 50 mm (predetermined distance) from the volume sound source as the sound pressure level P of the sound source. source .

[0055] 2). Test the acoustic-acoustic transfer function from the tire to the vehicle interior. Move the vehicle into the anechoic chamber and arrange a microphone at the right ear (FLR) of the driver inside the vehicle. Then, arrange the sound source openings of the volume sound source at 4 positions, namely the front side, rear side, inner side, and outer side of the four tires, at a distance of 50 mm from the tires. Turn on the sound source and test the sound pressure level at the driver's position inside the vehicle, as Figures 1 - 3 shown.

[0056] 3). Calculate the noise attenuation from the tire to the vehicle interior. After obtaining the data, perform an energy averaging process on the sound pressure levels of the four groups of FLR measurement points tested at the four positions of the left front tire where the volume sound source is arranged to obtain the average sound pressure level at FLR. Calculate the noise attenuation P from the left front tire to the FLR position according to formula (2) of the noise attenuation. LF-TPNR .

[0057]

[0058]

[0059] Where: P i is the sound pressure level from the four positions of the front side, rear side, inner side, and outer side of the above-mentioned left front tire to the FLR measurement point inside the vehicle;

[0060] 4). Using the same processing method, obtain the noise attenuation P RF-TPNR , P LR-TPNR and P RR-TPNR from the right front, left rear, and right rear tires to the FLR measurement point inside the vehicle respectively.

[0061] 5). Calculate the tire radiation sound under operating conditions. Move the vehicle into an anechoic laboratory with a drum and arrange microphones at 4 positions, namely the front side, rear side, inner side, and outer side of the 4 tires, close to the tire center and at a distance of 50 mm from the tires, as Figures 4 - 6 shown. Set the drum running speed to 60 km / h for the road noise complaint condition for testing, and only turn on the left front wheel drum to run, excluding the noise influence when the other three tires are running. Obtain the sound pressure levels P LF-i of the 4 microphones around the left front tire and perform an energy averaging calculation to obtain the radiation sound of the left front tire.

[0062]

[0063] Where: P LF-i is the sound pressure level of the microphones at the four positions of the front side, rear side, inner side, and outer side of the above-mentioned left front tire during the operation of the drum;

[0064] 5), Using the same processing method, the radiated sounds of the right front, left rear, and right rear tires are obtained respectively and

[0065] 7), Tire transfer path contribution analysis. Calculate the difference between the radiated sound of the left front tire and the noise attenuation P LF-TPNR from the left front tire to the FLR position to obtain the noise contribution ΔP LF of the left front tire to the FLR position inside the vehicle. Using the same processing method, the noise contributions ΔP RF , ΔP LR and ΔP RR of the other three tires to the FLR position inside the vehicle are obtained.

[0066]

[0067] Compare the noise contributions ΔP LF , ΔP RF , ΔP LR and ΔP RR of the four tires to the FLR position inside the vehicle through formula (5). In the frequency range of the road noise problem frequency band, the larger the value, the greater the noise contribution to the FLR position, thereby determining the main transfer path of the road noise.

[0068] ΔP = MAX{ΔP LF , ΔP RF , ΔP LR , ΔP RR} (5)

[0069] The above method is only illustrated by taking the driver's position complaint about the tire tread noise as an example. If the road noise is at the co-pilot position, when conducting the sound-to-sound transfer function test from the tire to the inside of the vehicle, the microphone needs to be arranged at the right ear (FRR) position of the co-pilot. If there is road noise problem at all four positions in the passenger compartment, the microphones need to be arranged at the right ear (FLR) of the driver, the right ear (FRR) of the co-pilot, the right ear (RLR) of the left rear row, and the right ear (RRR) of the right rear row. Calculate the noise attenuation from the tire to the above-mentioned 4 positions inside the vehicle, and then determine the tire transfer path corresponding to the noise at each position.

[0070] 2. Identification of the wheelhouse liner sound source

[0071] The sound intensity method is used to measure the wheel sound intensity distribution, and then determine the position with a larger sound source. The PU probe is as Figure 7 shown, and the obtained sound intensity I can be expressed by the following formula:

[0072]

[0073] where is the instantaneous sound pressure, and is the corresponding instantaneous particle velocity.

[0074] The transient average sound pressure of the PU probe is:

[0075]

[0076] where p A and p B are respectively Figure 7 the transient sound pressures at both ends of the PU probe in

[0077] According to Euler's theoretical formula:

[0078]

[0079] In the above formula, ρ is the air density, and Δr is the distance between both ends of the PU probe. Then the transient sound intensity can be expressed as:

[0080]

[0081] According to the vehicle road noise complaint, after determining the main tire transfer paths corresponding to the road noise, it is necessary to analyze the sound source distribution between the tire and the wheelhouse liner. Move the vehicle into an anechoic laboratory with a drum, and set the drum test conditions according to the above road noise problem, such as testing at a vehicle speed of 60 km / h. Using the sound intensity method, place a camera at a certain distance from the tire to obtain a clear picture of the tire and the wheelhouse liner as the criterion. Place the PU probe into the three-dimensional space between the tire and the wheelhouse liner, and move it slowly from front to back and from outside to inside until the PU probe sweeps through all the space between the tire and the wheelhouse liner, as Figure 8 . After the test is completed, the sound source distribution positions of the outer wheelhouse liner in each frequency range can be analyzed through formula (9), as Figure 10 shown.

[0082] 3. Identification of sound sources in the wheel arch and its surroundings

[0083] Similarly in the drum laboratory, referring to the sound source identification method of the wheelhouse liner, place the test equipment inside the vehicle. The sound intensity method is used in the range. Place a camera at a certain distance from the wheelhouse sound insulation pad near the main transmission path to obtain clear pictures of the wheelhouse sound insulation pad, carpet and surrounding components as the criterion. Place the PU probe on the surface of the wheelhouse sound insulation pad, carpet and other surrounding components and move it slowly until the PU probe sweeps across the entire area. After the test, the sound intensity distribution inside the vehicle in each frequency range can be analyzed to determine the main position of the sound source distribution. The sound intensity distribution of the carpet at the driver's seat is as Figure 11 .

[0084] The above method of the present invention can eliminate the test errors caused by different environments and wind speeds during road tests, more accurately identify the noise contribution from the four tires to the inside of the vehicle during vehicle operation, and thus determine the main transmission paths of road noise and airborne noise. Analyze the sound source positions in different problem frequency ranges from outside and inside the vehicle respectively, which can help to design the noise reduction wheelhouse liner and the layout of the interior acoustic materials targeted, and optimize the road noise quality problem of the whole vehicle. It not only improves the R & D efficiency, but also avoids unnecessary addition of acoustic materials and increases in cost.

Claims

1. A method for identifying the location of road noise sources, characterized in that, Including: Step 1: Conduct a vehicle road noise test and a subjective evaluation test on the vehicle to be tested on a test road to determine the road noise complaint conditions that cause mid- and high-frequency airborne noise, the frequency range in which the mid- and high-frequency airborne noise is distributed, and the complaint positions inside the passenger compartment. Step 2: According to the road noise complaint conditions, the frequency range in which the mid- and high-frequency airborne noise is distributed, and the complaint positions inside the passenger compartment, determine the noise attenuation amount from each tire of the vehicle to be tested to the complaint positions inside the passenger compartment when the vehicle to be tested is arranged in an anechoic chamber, and determine the radiated sound of each tire of the vehicle to be tested when the vehicle to be tested is arranged in a reverberation chamber with a drum. Step 3: Based on the noise attenuation amount from each tire of the vehicle to be tested to the complaint positions inside the passenger compartment and the radiated sound of each tire of the vehicle to be tested, determine the main transmission path with the largest noise contribution in the said frequency range. Step 4: In a reverberation chamber with a drum, use a camera and a PU probe to identify the sound source distribution positions in the space between the target tire corresponding to the main transmission path and the target wheelhouse liner. Step 5: In a reverberation chamber with a drum, use a camera and a PU probe to identify the sound source distribution positions in the wheel arch and the area around the wheel arch of the target tire corresponding to the main transmission path. In Step 2, the steps for determining the noise attenuation amount from each tire of the vehicle to be tested to the complaint positions inside the passenger compartment when the vehicle to be tested is arranged in an anechoic chamber include: Step 211: Arrange the vehicle to be tested in an anechoic chamber, arrange the sound source openings of the volume source at 4 positions at a predetermined distance from the first tire corresponding to the complaint position inside the passenger compartment, and arrange a microphone at the complaint position inside the passenger compartment. Step 212: Turn on the volume source, perform energy averaging on the 4 groups of sound pressure levels corresponding to the 4 positions of the first tire of the volume source to obtain the average sound pressure level at the complaint position inside the passenger compartment. Step 213: Calculate the noise attenuation amount from the first tire to the complaint position inside the passenger compartment according to the average sound pressure level at the complaint position inside the passenger compartment. Step 214: Arrange the sound source openings of the volume source at 4 positions at a predetermined distance from the second tire of the vehicle to be tested, and turn on the volume source for the second tire to obtain the noise attenuation amount from the second tire to the complaint position inside the passenger compartment. Step 215: Arrange the sound source openings of the volume source at 4 positions at a predetermined distance from the third tire of the vehicle to be tested, and turn on the volume source for the third tire to obtain the noise attenuation amount from the third tire to the complaint position inside the passenger compartment. Step 216: Arrange the sound source openings of the volume source at 4 positions at a predetermined distance from the fourth tire of the vehicle to be tested, and turn on the volume source for the fourth tire to obtain the noise attenuation amount from the fourth tire to the complaint position inside the passenger compartment.

2. The method according to claim 1, characterized in that In Step 2, the steps for determining the radiated sound of each tire of the vehicle to be tested when the vehicle to be tested is arranged in a reverberation chamber with a drum include: Step 221: Arrange the vehicle to be tested in a reverberation chamber with a drum, and arrange 4 microphones at 4 positions at a predetermined distance from the first tire corresponding to the complaint position inside the passenger compartment. Step 222: Set the running speed of the drum on the side where the occupant compartment complaint location is located to the speed corresponding to the road noise complaint condition, and run the drum on the side where the occupant compartment complaint location is located to obtain the radiated sound of the first tire. Step 223: Arrange the vehicle to be tested in an anechoic chamber with drums, and arrange 4 microphones at 4 positions at a predetermined distance from the second tire. Step 224: Set the running speed of the drum on the side where the second tire is located to the speed corresponding to the road noise complaint condition, and run the drum on the side where the second tire is located to obtain the radiated sound of the second tire. Step 225: Arrange the vehicle to be tested in an anechoic chamber with drums, and arrange 4 microphones at 4 positions at a predetermined distance from the third tire. Step 226: Set the running speed of the drum on the side where the third tire is located to the speed corresponding to the road noise complaint condition, and run the drum on the side where the third tire is located to obtain the radiated sound of the third tire. Step 227: Arrange the vehicle to be tested in an anechoic chamber with drums, and arrange 4 microphones at 4 positions at a predetermined distance from the fourth tire. Step 228: Set the running speed of the drum on the side where the fourth tire is located to the speed corresponding to the road noise complaint condition, and run the drum on the side where the fourth tire is located to obtain the radiated sound of the fourth tire.

3. The method according to claim 2, characterized in that Step 3 includes: Step 311: Subtract the noise attenuation from the first tire to the occupant compartment complaint location from the radiated sound of the first tire to obtain the noise contribution from the first tire to the occupant compartment complaint location; subtract the noise attenuation from the second tire to the occupant compartment complaint location from the radiated sound of the second tire to obtain the noise contribution from the second tire to the occupant compartment complaint location; subtract the noise attenuation from the third tire to the occupant compartment complaint location from the radiated sound of the third tire to obtain the noise contribution from the third tire to the occupant compartment complaint location; subtract the noise attenuation from the fourth tire to the occupant compartment complaint location from the radiated sound of the fourth tire to obtain the noise contribution from the fourth tire to the occupant compartment complaint location. Step 312: Select the transfer path corresponding to the maximum median value among the noise contributions from the first tire to the occupant compartment complaint location, the noise contribution from the second tire to the occupant compartment complaint location, the noise contribution from the third tire to the occupant compartment complaint location, and the noise contribution from the fourth tire to the occupant compartment complaint location as the main transfer path.

4. The method according to claim 2, wherein The radiated sound of the first tire to the radiated sound of the fourth tire is obtained through the formula: It is calculated that is the radiated sound of the tire to be calculated, and i is the i-th microphone arranged near the tire to be calculated, and p i is the sound pressure level collected by the i-th microphone.

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