Noise isolation devices for vehicle cabs and their arrangement methods
By using a combination of plant fiber layers, foam material layers, elastic fiber layers, and aluminum foil layers in the vehicle cab, noise insulation is achieved for specific working conditions, solving the problems of material waste and poor sound insulation performance in existing technologies, and achieving effective noise reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FAW JIEFANG AUTOMOTIVE CO
- Filing Date
- 2023-03-21
- Publication Date
- 2026-06-30
AI Technical Summary
Existing technologies cannot effectively isolate noise under specific working conditions, resulting in material waste and increased costs, and their sound insulation and absorption performance is poor under certain working conditions.
The system employs a combination structure of a basic sound insulation layer group and a reinforced sound insulation layer group. The basic sound insulation layer group includes a plant fiber layer and a foam material layer, while the reinforced sound insulation layer group includes an elastic fiber layer and an aluminum foil layer. By adjusting the arrangement of the reinforced sound insulation layer group, noise isolation is optimized under simulated working conditions to meet the ideal sound insulation level.
It achieves effective noise isolation for specific operating conditions, avoids waste of interior materials, improves the sound insulation performance of the cab, and reduces noise levels.
Smart Images
Figure CN116373757B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle interior technology, and in particular to a noise isolation device for a vehicle cab and its arrangement method. Background Technology
[0002] As people's living standards improve, commercial vehicle users are increasingly pursuing driving comfort and demanding a quiet and comfortable interior for the cab.
[0003] Currently, most OEMs rely on physical noise isolation methods, such as increasing the density of interior trim panels and adding sound-absorbing cotton to improve the sound insulation and absorption performance of the cab. This method of piling up materials does not specifically isolate and absorb noise at different frequency bands, resulting in material waste and increased costs. Furthermore, this method fails to effectively analyze the noise spectrum of a specific vehicle under specific operating conditions, thus failing to effectively isolate noise at specific frequencies. This leads to poor sound insulation and absorption performance in the cab under certain conditions, resulting in customer complaints. Summary of the Invention
[0004] Therefore, it is necessary to provide a noise isolation device and its arrangement method for vehicle cabs to address the problem of how to effectively isolate noise under specific working conditions.
[0005] One aspect of this application provides a noise isolation device for a vehicle cab, comprising:
[0006] A basic sound insulation layer assembly, one side of which is attached to the white frame of the vehicle's cab; and
[0007] A reinforced sound insulation layer assembly is attached to the base sound insulation layer assembly on the side of the white frame opposite to the vehicle cab, and the reinforced sound insulation layer assembly is arranged in a predetermined area on the base sound insulation layer assembly.
[0008] In one embodiment, the basic sound insulation layer assembly includes:
[0009] A first plant fiber layer, one side of which is attached to the white frame of the vehicle cab;
[0010] A foamed material layer, one side of which is attached to the first plant fiber layer opposite to the white frame of the vehicle cab; and
[0011] The second plant fiber layer has one side attached to the foam material layer opposite to the side of the first plant fiber layer.
[0012] In one embodiment, the density of the first plant fiber layer is 350 g / m³. 2~600g / m 2 The thickness of the first plant fiber layer is 0.8 mm to 1.5 mm, and the material of the first plant fiber layer is any one of hemp fiber, bamboo fiber, glass fiber, and basalt fiber; the density of the second plant fiber layer is 350 g / m³. 2 ~600g / m 2 The thickness of the second plant fiber layer is 0.8 mm to 1.5 mm, and the material of the second plant fiber layer is any one of hemp fiber, bamboo fiber, glass fiber, and basalt fiber; the density of the foaming material layer is 550 g / m³. 2 ~750g / m 2 The material of the foaming material layer is rigid polyurethane foam.
[0013] In one embodiment, the reinforced sound insulation layer assembly includes:
[0014] An elastic fiber layer, one side of which is attached to the base sound insulation layer assembly opposite to the white frame of the vehicle cab; and
[0015] An aluminum foil layer, one side of which is attached to the elastic fiber layer opposite to the side of the basic sound insulation layer assembly.
[0016] In one embodiment, the elastic fiber layer includes polyester fibers and polyester fibers with an elastic structure, wherein the weight ratio of the polyester fibers to the polyester fibers with the elastic structure is (75-85):(15-25).
[0017] In one embodiment, the aluminum foil layer has an uneven structure.
[0018] In one embodiment, the density of the elastic fiber layer is 20 g / m³. 2 ~50g / m 2 The thickness of the elastic fiber layer is 10mm to 20mm.
[0019] Another aspect of this application provides a method for arranging a noise insulation device for a vehicle cab as described above, comprising the steps of:
[0020] The basic sound insulation layer assembly is attached to the white frame of the vehicle cab;
[0021] The initial area where the reinforced sound insulation layer group is attached to the basic sound insulation layer group;
[0022] Under simulated operating conditions, the actual sound insulation of the vehicle's cab was obtained;
[0023] When the actual sound insulation of the vehicle cab does not meet the ideal sound insulation of the vehicle cab, the initial design area is adjusted to obtain an initial adjustment area; and
[0024] After attaching the sound insulation layer group to the initial adjustment area on the basic sound insulation layer group, return to the step of obtaining the actual sound insulation of the vehicle cab under simulated working conditions until the actual sound insulation of the vehicle cab meets the ideal sound insulation of the vehicle cab, and mark the initial adjustment area as the preset area corresponding to the simulated working conditions.
[0025] In one embodiment, after obtaining the actual sound insulation of the vehicle cab under simulated operating conditions, the step further includes the step of: when the actual sound insulation of the vehicle cab meets the ideal sound insulation of the vehicle cab, marking the initial area as the preset area corresponding to the simulated operating conditions.
[0026] In one embodiment, the step of obtaining the actual sound insulation of the vehicle cab under simulated operating conditions includes the following sub-steps:
[0027] Obtain the sound insulation value of the exterior of the vehicle's driver's cab;
[0028] Obtain the sound insulation value inside the vehicle's driver's cab; and
[0029] The actual sound insulation of the vehicle cab is determined based on the difference between the sound insulation outside the vehicle cab and the sound insulation inside the vehicle cab.
[0030] This application arranges reinforced sound insulation layers in a preset area on the basic sound insulation layer group. By adjusting the arrangement of the reinforced sound insulation layer group, effective noise isolation can be achieved for specific working conditions, while also avoiding waste of interior materials. Attached Figure Description
[0031] Figure 1 A schematic diagram of the structure of a noise isolation device for a vehicle cab provided in an embodiment of this application is shown.
[0032] Figure 2 A schematic flowchart illustrating the arrangement method of a noise isolation device for a vehicle cab according to an embodiment of this application is shown.
[0033] Icon labels:
[0034] 10-Basic sound insulation layer group;
[0035] 11-First plant fiber layer;
[0036] 12- Foamed material layer;
[0037] 13-Second plant fiber layer;
[0038] 20 - Reinforced sound insulation layer group;
[0039] 21-Elastic fiber layer;
[0040] 22-Aluminum foil layer. Detailed Implementation
[0041] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0042] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0043] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0045] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0046] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0047] See Figure 1 , Figure 1 A schematic diagram of a noise isolation device for a vehicle cab according to an embodiment of this application is shown. An embodiment of this application provides a noise isolation device for a vehicle cab, comprising: a basic sound insulation layer assembly 10 and a reinforcing sound insulation layer assembly 20. One side of the basic sound insulation layer assembly 10 is attached to the white frame of the vehicle cab; the reinforcing sound insulation layer assembly 20 is attached to the side of the basic sound insulation layer assembly 10 opposite to the white frame of the vehicle cab, and the reinforcing sound insulation layer assembly 20 is arranged in a predetermined area on the basic sound insulation layer assembly 10.
[0048] By arranging reinforced sound insulation layers in preset areas on the basic sound insulation layer group, effective noise isolation can be achieved for specific working conditions by adjusting the arrangement of the reinforced sound insulation layer group, while also avoiding waste of interior materials.
[0049] In one embodiment of this application, the basic sound insulation layer assembly 10 includes: a first plant fiber layer 11, a foam material layer 12, and a second plant fiber layer 13. (See reference...) Figure 1 As shown, the top surface of the first plant fiber layer 11 is attached to the white frame of the vehicle cab; the top surface of the foam material layer 12 is attached to the side of the first plant fiber layer 11 opposite to the white frame of the vehicle cab (i.e., Figure 1 The bottom surface of the first plant fiber layer 11 shown in the figure); the top surface of the second plant fiber layer 13 is attached to the foam material layer 12 on the side opposite to the first plant fiber layer 11 (i.e., Figure 1(The bottom surface of the foamed material layer 12 is shown in the figure). In this application, the first plant fiber layer 11 and the second plant fiber layer 13 use high-density plant fibers, which have good sound insulation performance. At the same time, due to the elasticity of plant fibers, the sound absorption effect can be further improved. By arranging the foamed material layer 12, noise sound waves can be continuously reflected in the foamed material layer 12, continuously consuming sound wave energy, thereby reducing noise.
[0050] In an optional embodiment, the first plant fiber layer 11 and the second plant fiber layer 13 have the same structure. The density of the first plant fiber layer 11 is 350 g / m³. 2 ~600g / m 2 The thickness of the first plant fiber layer 11 is 0.8 mm to 1.5 mm, and the material of the first plant fiber layer 11 is any one of hemp fiber, bamboo fiber, glass fiber, and basalt fiber; the density of the second plant fiber layer 13 is 350 g / m³. 2 ~600g / m 2 The thickness of the second plant fiber layer 13 is 0.8 mm to 1.5 mm, and the material of the second plant fiber layer 13 is any one of hemp fiber, bamboo fiber, glass fiber, and basalt fiber.
[0051] In one specific embodiment, the density of both the first plant fiber layer 11 and the second plant fiber layer 13 is 350 g / m³. 2 The thickness of the first plant fiber layer 11 and the second plant fiber layer 13 is 0.8 mm, and the material of the first plant fiber layer 11 and the second plant fiber layer 13 is hemp fiber.
[0052] In one specific embodiment, the density of both the first plant fiber layer 11 and the second plant fiber layer 13 is 600 g / m³. 2 The thickness of the first plant fiber layer 11 and the second plant fiber layer 13 is 1.5 mm, and the material of the first plant fiber layer 11 and the second plant fiber layer 13 is basalt fiber.
[0053] In one specific embodiment, the density of both the first plant fiber layer 11 and the second plant fiber layer 13 is 400 g / m³. 2 The thickness of the first plant fiber layer 11 and the second plant fiber layer 13 is 1 mm, and the material of the first plant fiber layer 11 and the second plant fiber layer 13 is bamboo fiber.
[0054] In an alternative embodiment, the first plant fiber layer 11 and the second plant fiber layer 13 have different structures.
[0055] In one specific embodiment, the density of the first plant fiber layer 11 is 350 g / m³. 2 The density of the second plant fiber layer 13 is 400 g / m³.2 The thickness of the first plant fiber layer 11 is 0.8 mm, and the thickness of the second plant fiber layer 13 is 1 mm. The material of the first plant fiber layer 11 is hemp fiber, and the material of the second plant fiber layer 13 is bamboo fiber.
[0056] In one specific embodiment, the density of the first plant fiber layer 11 is 600 g / m³. 2 The density of the second plant fiber layer 13 is 400 g / m³. 2 The thickness of the first plant fiber layer 11 is 1.5 mm, and the thickness of the second plant fiber layer 13 is 1 mm. The material of the first plant fiber layer 11 is glass fiber, and the material of the second plant fiber layer 13 is basalt fiber.
[0057] In one specific embodiment, the density of the first plant fiber layer 11 is 450 g / m³. 2 The density of the second plant fiber layer 13 is 400 g / m³. 2 The thickness of the first plant fiber layer 11 is 1.2 mm, and the thickness of the second plant fiber layer 13 is 1 mm. The material of the first plant fiber layer 11 is hemp fiber, and the material of the second plant fiber layer 13 is bamboo fiber.
[0058] The positions of the first plant fiber layer 11 and the second plant fiber layer 13 in the above specific embodiments can also be interchanged, that is, they are not limited to... Figure 1 The arrangement shown in the figure (the first plant fiber layer 11 is arranged on the top surface of the foam material layer 12 and the second plant fiber layer 13 is arranged on the bottom surface of the foam material layer 12) can also be such that the first plant fiber layer 11 is arranged on the bottom surface of the foam material layer 12 and the second plant fiber layer 13 is arranged on the top surface of the foam material layer 12.
[0059] In an optional embodiment, the density of the foamed material layer 12 is 550 g / m³. 2 ~750g / m 2 The foaming material layer 12 is made of rigid polyurethane foam.
[0060] In one specific embodiment, the foam material layer 12 is selected with a density of 550 g / m³. 2 Rigid polyurethane foam.
[0061] In one specific embodiment, the foam material layer 12 is selected with a density of 750 g / m³. 2 Rigid polyurethane foam.
[0062] In one specific embodiment, the foam material layer 12 is selected with a density of 600 g / m³. 2 Rigid polyurethane foam.
[0063] In one embodiment of this application, the reinforced sound insulation layer group 20 includes: an elastic fiber layer 21 and an aluminum foil layer 22.
[0064] The top surface of the elastic fiber layer 21 is attached to the base sound insulation layer assembly 10 on the side opposite to the white frame of the vehicle cab (e.g., Figure 1 The bottom surface of the second plant fiber layer 13 shown); the top surface of the aluminum foil layer 22 is attached to the elastic fiber layer 21 on the side opposite to the base sound insulation layer assembly 10 (as shown). Figure 1 (The bottom surface of the aluminum foil layer 22 shown).
[0065] In an optional embodiment, the elastic fiber layer 21 includes polyester fibers and polyester fibers with an elastic structure, wherein the weight ratio of polyester fibers to polyester fibers with an elastic structure is (75-85):(15-25). In this embodiment, by adding a certain proportion of polyester fibers with an elastic structure to the polyester fibers, the polyester fiber portion is guaranteed to vibrate after the noise waves reach the sound absorption device, thereby consuming the noise wave energy, reducing energy transfer, and thus reducing noise.
[0066] In one specific embodiment, the weight ratio of polyester fiber to polyester fiber with an elastic structure is 85:15.
[0067] In one specific embodiment, the weight ratio of polyester fiber to polyester fiber with an elastic structure is 75:25.
[0068] In one specific embodiment, the weight ratio of polyester fiber to polyester fiber with an elastic structure is 80:20.
[0069] In an optional embodiment, the aluminum foil layer 22 has an uneven structure, which allows noise to penetrate the aluminum foil layer to the maximum extent, consumes the energy of low and medium frequency noise to the maximum extent, and avoids low and medium frequency noise being directly reflected back to the cab, generating reverberation and increasing noise.
[0070] In an optional embodiment, the density of the elastic fiber layer 21 is 20 g / m³. 2 ~50g / m 2 The thickness of the elastic fiber layer 21 is 10mm to 20mm.
[0071] In one specific embodiment, the density of the elastic fiber layer 21 is 20 g / m³. 2 The thickness of the elastic fiber layer 21 is 10 mm.
[0072] In one specific embodiment, the density of the elastic fiber layer 21 is 50 g / m³. 2 The thickness of the elastic fiber layer 21 is 20 mm.
[0073] In one specific embodiment, the density of the elastic fiber layer 21 is 30 g / m³.2 The thickness of the elastic fiber layer 21 is 15 mm.
[0074] See Figure 2 , Figure 2 This illustration shows a flowchart of a method for arranging a noise isolation device for a vehicle cab according to an embodiment of this application. The method for arranging a noise isolation device for a vehicle cab as described above, provided in an embodiment of this application, includes the following steps:
[0075] S10, attach the basic sound insulation layer assembly 10 to the white frame of the vehicle cab. Generally, the basic sound insulation layer assembly 10 is adhered to the inner surface of the white frame of the vehicle cab using water-soluble adhesive, which can broaden the adhesion of the sound-absorbing cotton to various environmental conditions. Especially under cold operating conditions, it can ensure that the overall sound absorption quality remains unchanged.
[0076] S20 is the initial area where the reinforced sound insulation layer assembly 20 is attached to the basic sound insulation layer assembly 10. The reinforced sound insulation layer assembly 20 is a one-piece molded plate structure, which can be designed with corresponding dimensions according to the boundary structure of the vehicle body side panel, roof, and rear panel, and then cut and arranged at the vehicle body side panel, roof, and rear panel boundary, etc.
[0077] S30 obtains the actual sound insulation of the vehicle cab under simulated operating conditions.
[0078] S40, when the actual sound insulation of the vehicle cab does not meet the ideal sound insulation of the vehicle cab, the initial design area is adjusted to obtain the initial design adjustment area.
[0079] S50, after attaching the reinforced sound insulation layer group to the initial adjustment area on the basic sound insulation layer group, return to step S30 until the actual sound insulation of the vehicle cab meets the ideal sound insulation of the vehicle cab, and mark the initial adjustment area as the preset area corresponding to the simulated working condition.
[0080] In one specific embodiment, the overall NVH value (measurement point set next to the driver's ear in the vehicle cab) in a certain dump truck NVH solution test can reach at least 55.5dB. After arranging the noise isolation device for the vehicle cab in the above arrangement, the overall noise improvement value is at least 36.6dB.
[0081] In one embodiment of this application, the step S30 is followed by the following step:
[0082] S50: When the actual sound insulation of the vehicle cab meets the ideal sound insulation of the vehicle cab, the initial area is marked as the preset area corresponding to the simulated working condition.
[0083] In one embodiment of this application, step S30 includes the following sub-steps:
[0084] S31, Obtain the sound insulation value of the exterior of the vehicle's driver's cab. Generally, three measurement points are set at the front, left, and right sides of the vehicle's driver's cab to obtain the sound insulation value of the exterior of the driver's cab.
[0085] S32, Obtain the sound insulation value inside the vehicle's driver's compartment. Generally, a measurement point is set near the driver's ear inside the vehicle's driver's compartment to obtain the sound insulation value inside the vehicle's driver's compartment.
[0086] S33, determine the actual sound insulation of the vehicle cab based on the difference between the sound insulation outside the vehicle cab and the sound insulation inside the vehicle cab.
[0087] Furthermore, the noise spectrum corresponding to the actual sound insulation of the vehicle cab, the noise spectrum corresponding to the sound insulation outside the vehicle cab, and the noise spectrum corresponding to the sound insulation inside the vehicle cab can be plotted to more clearly show the sound insulation status through diagrams.
[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A noise isolation device for a vehicle cab, characterized in that, include: A basic sound insulation layer assembly (10) is attached to the white frame of the vehicle cab on one side. The basic sound insulation layer assembly (10) includes: A first plant fiber layer (11) is attached to the white frame of the vehicle cab on one side. A foamed material layer (12), one side of which is attached to the first plant fiber layer (11) opposite to the white frame of the vehicle cab; and A second plant fiber layer (13), one side of which is attached to the foam material layer (12) opposite to the first plant fiber layer (11); and The sound insulation layer group (20) is attached to the side of the white frame of the vehicle cab opposite to the base sound insulation layer group (10), and the sound insulation layer group (20) is dynamically adjusted and arranged in a preset area on the base sound insulation layer group (10) according to the actual sound insulation measurement results, compared with the ideal sound insulation volume of the vehicle cab; the sound insulation layer group (20) includes an elastic fiber layer (21) and an aluminum foil layer (22); the elastic fiber layer (21) includes polyester fiber and polyester fiber with elastic structure.
2. The noise isolation device for a vehicle cab according to claim 1, characterized in that, The density of the first plant fiber layer (11) is 350 g / m³. 2 ~600 g / m 2 The thickness of the first plant fiber layer (11) is 0.8 mm to 1.5 mm, and the material of the first plant fiber layer (11) is any one of hemp fiber, bamboo fiber, glass fiber, and basalt fiber; the density of the second plant fiber layer (13) is 350 g / m³. 2 ~600 g / m 2 The thickness of the second plant fiber layer (13) is 0.8 mm to 1.5 mm, and the material of the second plant fiber layer (13) is any one of hemp fiber, bamboo fiber, glass fiber, and basalt fiber; the density of the foam material layer (12) is 550 g / m³. 2 ~750 g / m 2 The material of the foaming material layer (12) is rigid polyurethane foam.
3. The noise isolation device for a vehicle cab according to claim 1, characterized in that, One side of the elastic fiber layer (21) is attached to the base sound insulation layer assembly (10) opposite to the side of the white frame of the vehicle cab; and One side of the aluminum foil layer (22) is attached to the elastic fiber layer (21) on the side opposite to the basic sound insulation layer group (10).
4. The noise isolation device for a vehicle cab according to claim 3, characterized in that, The weight ratio of the polyester fiber to the polyester fiber with the elastic structure is (75-85):(15-25).
5. The noise isolation device for a vehicle cab according to claim 3, characterized in that, The aluminum foil layer (22) has an uneven structure.
6. The noise isolation device for a vehicle cab according to claim 3, characterized in that, The density of the elastic fiber layer (21) is 20 g / m³. 2 ~50 g / m 2 The thickness of the elastic fiber layer (21) is 10mm to 20mm.
7. A method for arranging a noise isolation device for a vehicle cab as described in any one of claims 1 to 6, characterized in that, Including the following steps: The basic sound insulation layer assembly is attached to the white frame of the vehicle cab; The initial area where the reinforced sound insulation layer group is attached to the basic sound insulation layer group; Under simulated operating conditions, the actual sound insulation of the vehicle's cab was obtained; When the actual sound insulation of the vehicle cab does not meet the ideal sound insulation of the vehicle cab, the initial design area is adjusted to obtain the initial design adjustment area. as well as After attaching the sound insulation layer group to the initial adjustment area on the basic sound insulation layer group, return to the step of obtaining the actual sound insulation of the vehicle cab under simulated working conditions until the actual sound insulation of the vehicle cab meets the ideal sound insulation of the vehicle cab, and mark the initial adjustment area as the preset area corresponding to the simulated working conditions. The reinforced sound insulation layer group (20) includes an elastic fiber layer (21) and an aluminum foil layer (22); the elastic fiber layer (21) includes polyester fibers and polyester fibers with an elastic structure.
8. The arrangement method according to claim 7, characterized in that, After obtaining the actual sound insulation of the vehicle cab under simulated operating conditions, the step further includes the step of: when the actual sound insulation of the vehicle cab meets the ideal sound insulation of the vehicle cab, marking the initial area as the preset area corresponding to the simulated operating conditions.
9. The arrangement method according to claim 7, characterized in that, The step of obtaining the actual sound insulation of the vehicle cab under simulated operating conditions includes the following sub-steps: Obtain the sound insulation value of the exterior of the vehicle's driver's cab; Obtain the sound insulation value inside the vehicle's driver's cab; as well as The actual sound insulation of the vehicle cab is determined based on the difference between the sound insulation outside the vehicle cab and the sound insulation inside the vehicle cab.