A noise reduction module for a vehicle

Abstract

The utility model discloses a kind of noise reduction modules for car, including shell, the bottom of shell is provided with the mounting lug plate for installing shell on car, the top of shell is provided with the cover plate for sealing shell, one end of mounting lug plate is sound inlet end, the sound inlet end of shell is provided with with sound guide tube for guiding sound into shell, the shell inside of sound guide tube inside is sequentially provided with micro-perforated panel for inhibiting middle-high frequency noise, gradient sound-absorbing cotton for inhibiting low frequency noise and resonance cavity array for inhibiting specific low frequency peak;The inner end of sound guide tube is provided with sound guide plate for dispersing and guiding sound, a plurality of through holes for sound passing through are formed on sound guide plate.The utility model is simple in structure, easy to install, sound wave enters shell sequentially through micro-perforated panel, gradient sound-absorbing cotton and resonance cavity array for noise reduction, realize wideband noise reduction, significantly improve the efficiency of noise energy absorption, and then improve the effect of noise reduction.

Description

Technical Field

[0001] This utility model relates to the field of vehicle equipment technology, and more specifically to a noise reduction module for automobiles. Background Technology

[0002] With the continuous development and progress of society, the number of vehicles on urban roads is constantly increasing, which has led to a gradual increase in the impact of ambient noise on people's daily work, life, and study. Common methods for solving noise problems include improving the sealing of spaces or using sound insulation materials. While these methods can reduce noise to some extent, their noise reduction effects are limited, and these measures may affect the spatial layout and appearance, while also incurring additional costs.

[0003] Existing automotive noise reduction measures mainly include sound-absorbing cotton and sound insulation panels. These measures generally have problems such as being effective for mid-to-high frequency noise but insufficient suppression of low-frequency noise, and performance degradation under high-temperature conditions. They also lack adaptive adjustment capabilities and cannot optimize the noise reduction effect for different operating conditions, thus affecting the overall noise reduction effect of the vehicle. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a noise reduction module for automobiles that is simple in structure, easy to install, and can suppress multi-frequency noise at the same time.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0006] A noise reduction module for automobiles includes a housing. The bottom of the housing has mounting ears for mounting the housing onto a vehicle, and the top of the housing has a cover for sealing the housing. One end of the mounting ears is a sound inlet end. The sound inlet end of the housing has a sound guide tube for guiding sound into the housing. Inside the sound guide tube, within the housing, are sequentially arranged a micro-perforated plate for suppressing mid-to-high frequency noise, gradient sound-absorbing cotton for suppressing low-frequency noise, and a resonant cavity array for suppressing specific low-frequency peaks. The inner end of the sound guide tube has a sound guide plate for dispersing and guiding sound, and the sound guide plate has several through holes for sound to pass through.

[0007] To further optimize the technical solution, a groove is formed at the bottom of the mounting ear plate, and a sealing ring is provided in the groove to improve the sealing performance between the housing and the car.

[0008] To further optimize the technical solution, the micro-perforated plate is provided with a number of micro-holes, which are cone-shaped structures with a diameter on the side facing the sound inlet end being larger than the diameter on the side facing the sound outlet end.

[0009] To further optimize the technical solution, the resonant cavity array includes several resonant cavities arranged together, and a sound tube for sound waves to enter the resonant cavity is provided on the side of the resonant cavity facing the sound inlet end.

[0010] To further optimize the technical solution, porous sound-absorbing cotton is provided between the resonant cavity array and the cover plate for further noise reduction.

[0011] To further optimize the technical solution, the sound guide plate is mounted on the sound guide tube by several spaced-apart pillars.

[0012] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0013] This utility model provides a noise reduction module for automobiles, which has a simple structure and is easy to install. When sound waves enter the housing, they pass through a micro-perforated plate, gradient sound-absorbing cotton and a resonant cavity array in sequence for noise reduction, achieving wide-band noise reduction and significantly improving the efficiency of noise energy absorption, thereby improving the noise reduction effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] The components are: 1. shell, 2. mounting ear plate, 3. groove, 4. sealing ring, 5. sound guide tube, 6. support column, 7. sound guide plate, 8. through hole, 9. micro-perforated plate, 10. gradient sound-absorbing cotton, 11. resonant cavity, 12. sound tube, 13. porous sound-absorbing cotton, and 14. cover plate. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] A noise reduction module for automobiles, combined with Figure 1 As shown, the device includes a housing 1, with a mounting ear plate 2 at the bottom for mounting the housing on a car, and a cover plate 14 at the top for sealing the housing 1. One end of the mounting ear plate is the sound inlet end.

[0018] A groove 3 is provided at the bottom of the mounting plate 2, and a sealing ring 4 is provided in the groove to improve the sealing performance between the housing and the car and prevent sound waves from flowing out from the connection.

[0019] The sound inlet end of the housing 1 is provided with a sound guide tube 5, which is used to guide the sound into the housing 1. The inner end of the sound guide tube 5 is provided with a sound guide plate 7, which is used to disperse the incoming sound waves. The sound guide plate 7 has several through holes 8, which are used for the sound waves to pass through. The sound guide plate 7 is provided on the sound guide tube 5 by several support columns 6. The multiple support columns are spaced apart. After the sound waves enter from the sound guide tube, they enter the interior of the housing through the gaps between the support columns and the through holes on the sound guide plate for noise reduction.

[0020] Inside the housing 1 on the inner side of the sound guide plate 7, there are sequentially arranged a micro-perforated plate 9, a gradient sound-absorbing cotton 10, and a resonant cavity array. The micro-perforated plate 9 has several micro-holes with a cone-shaped structure. The diameter of the micro-holes facing the sound inlet end is larger than the diameter of the micro-holes facing the sound outlet end to suppress mid-to-high frequency noise. The gradient sound-absorbing cotton 10 faces the sound inlet end to suppress low-frequency noise.

[0021] The resonant cavity array is used to suppress specific low-frequency peaks. The resonant cavity array includes several resonant cavities 11 arranged together. A sound tube 12 is provided on the side of the resonant cavity 11 facing the sound inlet end to allow sound waves to enter the resonant cavity. The sound waves enter the resonant cavity through the sound tube. The air column in the sound tube vibrates violently due to resonance, thereby dissipating the sound energy. After the sound passes through several resonant cavities, most of the sound wave energy is dissipated by the resonant cavities.

[0022] A porous absorbent cotton 13 is provided between the resonant cavity array and the cover plate 14 to further absorb noise.

[0023] This invention is installed on a car using an ear plate. Sound waves enter through the sound guide tube and are dispersed into the housing through the gap between the top sound guide plate and the support column. Noise reduction is achieved through the micro-perforated plate, gradient sound-absorbing cotton, and resonant cavity array, respectively, realizing wideband noise reduction and significantly improving the efficiency of noise energy absorption, thereby improving the noise reduction effect.

Claims

1. A noise reduction module for automobiles, characterized in that: The device includes a housing (1), with a mounting ear plate (2) at the bottom for mounting the housing on a car, and a cover plate (14) at the top for sealing the housing (1). One end of the mounting ear plate is a sound inlet end. The sound inlet end of the housing (1) is provided with a sound guide tube (5) for guiding sound into the housing (1). Inside the housing (1) on the inner side of the sound guide tube (5), there are a micro-perforated plate (9) for suppressing mid-to-high frequency noise, a gradient sound-absorbing cotton (10) for suppressing low frequency noise, and a resonant cavity array for suppressing specific low frequency peaks. The inner end of the sound guide tube (5) is provided with a sound guide plate (7) for dispersing and guiding sound. The sound guide plate (7) has several through holes (8) for sound to pass through.

2. The noise reduction module for automobiles according to claim 1, characterized in that: The bottom end of the mounting ear plate (2) has a groove (3) and a sealing ring (4) is provided in the groove to improve the sealing performance between the housing and the car.

3. The noise reduction module for automobiles according to claim 1, characterized in that: The micro-perforated plate (9) has several micro-holes, which are cone-shaped structures with a diameter on the side facing the sound inlet end being larger than the diameter on the side facing the sound outlet end.

4. The automotive noise reduction module according to claim 1, characterized in that: The resonant cavity array includes several resonant cavities (11) arranged together, and a sound tube (12) for sound waves to enter the resonant cavity is provided on the side of the resonant cavity (11) facing the sound inlet end.

5. A noise reduction module for automobiles according to claim 1, characterized in that: A porous sound-absorbing cotton (13) for further noise reduction is provided between the resonant cavity array and the cover plate (14).

6. The noise reduction module for automobiles according to claim 1, characterized in that: The sound guide plate (7) is mounted on the sound guide tube (5) by several spaced-apart support pillars (6).

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