Acoustic board
By setting the entrance area of different inlet channels in the sound absorbing cavity of the sound absorbing plate, the problem of poor absorption effect of the sound absorbing plate on different intensities is solved, and the optimized sound silence effect under different sound wave conditions is achieved.
Patent Information
- Application Number
- CN202421612513.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-07-09
AI Technical Summary
Existing sound absorbing plates cannot effectively absorb sound waves of different intensities, resulting in poor sound silencing effect when the sound wave intensity is too strong, or overflowing sound waves when the sound wave intensity is too weak, affecting the sound absorption effect.
The inlet area of the inlet channel in different sound absorbing chambers of the sound absorbing plate is set up to absorb sound waves of different intensities. The inlet area of the inlet channel increases or decreases in a certain direction, or changes periodically to adapt to different intensities The absorption demand of sound waves.
By adjusting the inlet area of the sound inlet channel, more sound waves can be absorbed in high-intensity sound waves, reduce overflow when low-intensity sound waves, improve the overall sound silencing effect, ensure that sound waves can be effectively absorbed under different sound wave conditions, and improve the sound absorption plate performance.
Smart Images
Figure CN222295540U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sound insulation materials, and more specifically to an improvement of a sound absorbing board. Background Art
[0002] Sound-absorbing board is an ideal sound-absorbing decorative material. It has the advantages of sound absorption, environmental protection, flame retardant, heat insulation, heat preservation, moisture resistance, mildew resistance, easy dust removal, easy cutting, parquet, simple construction, good stability, good impact resistance, good independence, high cost performance, etc. There are a variety of colors to choose from, which can meet the needs of sound-absorbing decoration of different styles and levels.
[0003] The Chinese invention patent publication number is CN112112300A. On December 22, 2020, a new type of metal Slott sound-absorbing panel was disclosed, including a stereo sound-absorbing mechanism fixedly installed on the upper surface of the substrate, and the stereo sound-absorbing mechanism is composed of closed protruding strip-shaped ribs and sound-transmitting cavities between adjacent strip-shaped ribs. The sound-absorbing panel achieves multi-directional and multi-angle reflection, refraction, and absorption of the sound source through the acoustic principles of setting strip-shaped ribs, sound-transmitting cavities, and rectangular holes, thereby achieving the purpose of sound elimination, sound absorption, noise reduction, and improvement of reverberation time. After the sound source enters the sound-transmitting cavity from the sound inlet and is absorbed by the rectangular holes on the inner wall, the sound energy is converted into heat energy by filling the sound-absorbing cotton in the product structure and process, thereby achieving the purpose of sound elimination, sound absorption, noise reduction, and improvement of reverberation time.
[0004] Although the above invention patent provides a sound-absorbing panel that absorbs sound waves well, there are still some shortcomings. In real life, there are sound waves of different areas with different energy intensities. The sound inlet holes on the sound-absorbing panel can absorb sound waves, causing the sound waves to reflect in the silencer cavity, converting the sound wave energy into vibration kinetic energy. However, when the sound wave intensity is too strong, some sound waves will not be able to enter the silencer cavity due to the small entrance area of the sound inlet channel, resulting in poor silencing effect. If the entrance area of the sound inlet channel is unilaterally expanded, the sound waves in the silencer cavity will overflow, resulting in poor sound absorption. Summary of the invention
[0005] In view of the technical problem that the sound absorbing panels in the prior art cannot absorb sound waves of different intensities well, this solution provides a sound absorbing panel. In this solution, different sound-absorbing cavities are provided with sound inlet channels of different areas to absorb sound waves of different intensities, thereby solving the technical problem in the prior art.
[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:
[0007] The utility model provides a sound absorbing board, comprising
[0008] A substrate, wherein the substrate is a flat plate;
[0009] A plurality of sound-blocking units, wherein the sound-blocking units are fixedly connected to the substrate, and each two adjacent sound-blocking units are spaced apart;
[0010] A plurality of silencing cavities, wherein the silencing cavities are formed at intervals between two adjacent sound-blocking units;
[0011] The sound inlet channel includes sound inlet holes respectively opened on the substrate and connected to each of the muffler cavities, and / or a gap between two adjacent sound-blocking units and connected to the corresponding muffler cavities, and the entrance areas of the sound inlet channels connected to different muffler cavities are not completely the same. In the case where the entrance areas of the sound inlet channels are not completely the same, when encountering high-intensity sound waves, the sound inlet channel with a larger entrance area can allow more sound waves to enter the muffler cavity for sound wave muffler processing, and when encountering sound waves with lower intensity, the muffler cavity with a smaller entrance area of the sound inlet channel can further reduce the sound wave dispersion and improve the muffler effect. In the case of low sound wave intensity, although a larger entrance area of the sound inlet channel will partially increase the sound wave dispersion, due to the low sound wave intensity, the dispersion effect is also correspondingly lower. Overall, in the case of low sound wave intensity, the muffler effect can also be improved.
[0012] In a sound absorbing plate provided in the present application, further, the entrance areas of the sound inlet channels corresponding to the plurality of silencing cavities increase or decrease in sequence along the first direction. Since the entrance areas of the sound inlet channels increase or decrease in sequence, sound waves of different intensities can be absorbed in a step-by-step manner, and the absorption effect is better.
[0013] In a sound absorbing board provided in the present application, further, the entrance areas of the sound inlet channels corresponding to the plurality of the muffler cavities increase first and then decrease or decrease first and then increase along the first direction. When the area of the sound absorbing board is large, the entrance area of the sound inlet channels can be set to increase first and then decrease or decrease first and then increase along the first direction on the sound absorbing board at the same time. Since the entrance area of the sound inlet channels changes symmetrically, the muffler effect will also be increased accordingly.
[0014] In a sound absorbing board provided in the present application, further, the entrance area of the sound inlet channel corresponding to the plurality of the muffler cavities changes periodically along the first direction. When the area of the base plate of the sound absorbing board is further increased, the volume of the muffler cavity cannot be increased infinitely, so more muffler cavities need to be set. With the increase of the muffler cavities, the muffler cavities on the sound absorbing board are set so that the entrance area of the sound inlet channel changes periodically along the first direction, which can better improve the muffler ability.
[0015] In a sound absorbing panel provided in the present application, further, the single silencer cavity is connected to a plurality of the sound inlet holes, the plurality of the sound inlet holes are linearly spaced along the length direction of the corresponding silencer cavity, and the entrance areas of the plurality of the sound inlet holes increase or decrease along the second direction.
[0016] In a sound absorbing plate provided in the present application, further, the entrance areas of the plurality of sound inlet holes first increase and then decrease or first decrease and then increase along the second direction.
[0017] In a sound absorbing plate provided in the present application, further, the entrance areas of the plurality of sound inlet holes are periodically changed along the second direction.
[0018] In a sound absorbing plate provided in the present application, further, the sound-absorbing unit includes a support plate vertically connected to the substrate and a vibrating fin fixed at one end of the support plate, and the adjacent vibrating fins, support plates and substrate constitute the silencing cavity.
[0019] In a sound absorbing plate provided in the present application, further, the sizes of the different silencing cavities are not completely the same, and the size of the silencing cavity is proportional to the entrance area of the corresponding sound inlet channel. The width of the vibrating fin is proportional to the size of the silencing cavity. The size of the silencing cavity is proportional to the entrance area of the sound inlet channel and the width of the vibrating fin, which can save space and arrange more silencing cavities to improve the silencing effect while meeting the silencing requirements.
[0020] The sound absorbing plate of the utility model can change the entrance area of the sound inlet channel. When encountering high-intensity sound waves, the sound inlet channel with a larger entrance area can allow more sound waves to enter the silencer chamber for sound wave silencer processing. When encountering sound waves with lower intensity, the sound inlet channel with a smaller entrance area can further reduce the sound wave spillover, thereby improving the sound silencing effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the sound-absorbing panel of the utility model;
[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the sound-absorbing panel of the utility model;
[0023] Figure 3 It is a schematic diagram showing that the entrance area of the sound inlet channel (sound inlet hole) on the substrate decreases or increases in the first direction;
[0024] Figure 4 It is a schematic diagram showing that the entrance area of the sound inlet channel (sound inlet hole) on the substrate first increases and then decreases, or first decreases and then increases, in a first direction;
[0025] Figure 5 It is a schematic diagram of periodic variation of the entrance area of the sound inlet channel (sound inlet hole) on the substrate in the first direction;
[0026] Figure 6 It is a schematic diagram showing that the entrance area of the sound inlet channel (gap) on the substrate decreases or increases in the first direction;
[0027] Figure 7 It is a schematic diagram showing that the entrance area of the sound inlet channel (gap) on the substrate first increases and then decreases, or first decreases and then increases, in a first direction;
[0028] Figure 8 It is a schematic diagram of periodic variation of the entrance area of the sound inlet channel (gap) on the substrate in the first direction;
[0029] Fig. 9 It is a schematic diagram showing that the entrance area of the sound inlet channel (sound inlet hole) on the substrate decreases or increases in the second direction;
[0030] Fig.10 It is a schematic diagram showing that the entrance area of the sound inlet channel (sound inlet hole) on the substrate first increases and then decreases, or first decreases and then increases in the second direction.
[0031] 100. Substrate;
[0032] 200, sound-proof unit; 210, support plate; 220, vibration fin;
[0033] 300, silencing chamber;
[0034] 400, sound inlet channel; 410, sound inlet hole; 420, gap. DETAILED DESCRIPTION
[0035] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.
[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.
[0037] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.
[0038] Example 1
[0039] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is:
[0040] like Figure 1-2 As shown, a sound absorbing board of the utility model comprises a substrate 100, and the substrate 100 is a flat plate body. The sound absorbing board is generally a wooden board or an aluminum alloy door board.
[0041] A plurality of sound-proofing units 200 are fixedly connected to the substrate 100, and each adjacent two sound-proofing units 200 are arranged at intervals. Each sound-proofing unit 200 comprises a support plate 210 fixedly connected to the substrate 100 and a vibrating fin 220 fixed to the top of the support plate 210. A sound-absorbing board has a plurality of silencing cavities 300, and the silencing cavities 300 are formed at intervals between two adjacent sound-proofing units 200.
[0042] The sound inlet channel 400 includes a sound inlet hole 410 connected to each silencing cavity 300 respectively opened on the substrate 100, and / or a gap 420 between two adjacent sound-blocking units 200 and connected to the corresponding silencing cavity 300. The entrance areas of the sound inlet channel 400 connected to different silencing cavities 300 are not exactly the same. The sound inlet channel 400 is the path for sound to enter the silencing cavity 300, including the sound inlet hole 410 on the substrate 100 and the gap 420 between the sound-blocking units 200. The entrance areas of the sound inlet channels 400 of different silencing cavities 300 may be different, which means that the orthographic projection areas of the entrances of the sound inlet holes 410 or gaps 420 on the substrate 100 are not exactly the same, and may be completely different or partially different. Such a design helps to eliminate noise more effectively.
[0043] In the case where the entrance areas of the sound inlet channel 400 are not exactly the same, when encountering high-intensity sound waves, the channel with a larger entrance area can allow more sound waves to enter the silencing chamber 300 for sound wave silencing. When encountering sound waves with lower intensity, the silencing chamber 300 with a smaller entrance area can further reduce the sound wave dispersion and improve the silencing effect. For the case where the sound wave intensity is not high, although the larger entrance area of the sound inlet channel 400 may partially increase the sound wave dispersion, the dispersion effect is correspondingly lower due to the low sound wave intensity. Overall, the silencing effect can still be improved when the sound wave intensity is not high.
[0044] Example 2
[0045] like Figure 3 , Figure 6 As shown, based on Example 1, the entrance areas of the sound inlet channels 400 corresponding to the plurality of muffler cavities 300 are successively increased or decreased along the first direction. Due to the increasing or decreasing design of the entrance area of the sound inlet channels 400, sound waves of different intensities can be absorbed in a step-by-step manner, thereby achieving a better absorption effect.
[0046] Example 3
[0047] like Figure 4 , Figure 7 As shown, based on the present embodiment 1, the entrance areas of the sound inlet channels 400 corresponding to the plurality of muffler cavities 300 increase first and then decrease or decrease first and then increase along the first direction. When the area of the sound absorbing board is large, the entrance area of the sound inlet channel 400 can be set to increase first and then decrease or decrease first and then increase along the first direction on the sound absorbing board at the same time. Since the entrance area of the sound inlet channel 400 changes symmetrically, the muffler effect will also be correspondingly increased.
[0048] Example 4
[0049] like Figure 5 As shown, on the basis of the present embodiment 1, the entrance areas of the sound inlet channels 400 corresponding to the plurality of silencing cavities 300 are periodically changed along the first direction. When the area of the sound absorbing board substrate 100 is further increased, the volume of the silencing cavity 300 cannot be infinitely increased, so more silencing cavities 300 need to be provided. With the increase of the silencing cavities 300, the entrance areas of the sound inlet channels 400 of the silencing cavities 300 provided on the sound absorbing board are periodically changed along the first direction, which can better improve the silencing capability.
[0050] Example 5
[0051] In this embodiment, a single silencing cavity 300 is connected to a plurality of sound inlet holes 410, and the plurality of sound inlet holes 410 are arranged at intervals along the corresponding straight line of the silencing cavity 300. A single silencing cavity 300 is connected to a plurality of sound inlet holes 410, which can expand the sound wave absorption capacity of each silencing cavity 300 and improve the silencing effect.
[0052] Example 6
[0053] like Figure 8 As shown, in this embodiment, the aperture areas of the plurality of sound inlet holes 410 increase or decrease gradually along the second direction.
[0054] like Fig. 9 As shown, in this embodiment, the aperture areas of the plurality of sound inlet holes 410 first increase and then decrease or first decrease and then increase along the second direction.
[0055] like Fig.10 As shown, in this embodiment, the aperture areas of the plurality of sound inlet holes 410 change periodically along the second direction.
[0056] The second direction is the length direction of the sound absorbing chamber 300, which is perpendicular to the first direction. The specific function is the same as the technical solutions of Embodiments 2 to 4, and its function is to improve the sound absorbing effect of the sound absorbing board in the second direction.
[0057] Example 7
[0058] like Figure 2 As shown, in this embodiment, the sound-proof unit 200 includes a support plate 210 vertically connected to the substrate 100 and a vibrating fin 220 fixed to one end of the support plate 210, and the adjacent vibrating fins 220, the support plate 210 and the substrate 100 form a muffler cavity 300. If the support plate 210 is a single flat plate, two adjacent support plates 210, two adjacent vibrating fins 220 and the corresponding areas of the substrate 100 of the above two form a muffler cavity 300. In addition, the support plate 210 can also be composed of two parallel flat plates.
[0059] The sizes of different silencer cavities 300 are not exactly the same, and the size of the silencer cavity 300 is proportional to the entrance area of the corresponding sound inlet channel 400. The width of the vibrating fin 220 is proportional to the size of the silencer cavity 300. The size of the silencer cavity 300 is proportional to the entrance area of the sound inlet channel 400 and the width of the vibrating fin 220, which can save space while meeting the silencing requirements, and improve the silencing effect by arranging more silencer cavities 300.
[0060] The terms "installed", "set", "provided with", and "connected" referred to herein should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0061] The sound absorbing plate in the above embodiments can improve the effective absorption of sound waves of different intensities by changing the aperture area of the sound absorbing holes, thereby improving the sound absorbing effect of the sound absorbing plate.
[0062] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.
Claims
1. A sound absorbing panel, characterized in that: include A substrate (100), wherein the substrate (100) is a flat plate; A plurality of sound-blocking units (200), wherein the sound-blocking units (200) are fixedly connected to the substrate (100), and each two adjacent sound-blocking units (200) are arranged at a distance from each other. A plurality of silencing cavities (300), wherein the silencing cavities (300) are formed at intervals between two adjacent sound-blocking units (200); A sound inlet channel (400), the sound inlet channel (400) comprising sound inlet holes (410) respectively opened on the substrate (100) and connected to each of the muffler cavities (300), and / or a gap (420) between two adjacent sound-blocking units (200) and connected to the corresponding muffler cavity (300), wherein the entrance areas of the sound inlet channels (400) connected to different muffler cavities (300) are not completely the same.
2. The sound absorbing panel according to claim 1, characterized in that: The entrance areas of the sound inlet channels (400) corresponding to the plurality of muffler cavities (300) increase or decrease in sequence along the first direction.
3. The sound absorbing panel according to claim 1, characterized in that: The inlet areas of the sound inlet channels (400) corresponding to the plurality of muffler cavities (300) first increase and then decrease, or first decrease and then increase, along a first direction.
4. The sound absorbing panel according to claim 1, characterized in that: The entrance areas of the sound inlet channels (400) corresponding to the plurality of silencing cavities (300) change periodically along the first direction.
5. The sound absorbing panel according to any one of claims 1 to 4, characterized in that: The single muffler cavity (300) is connected to a plurality of the sound inlet holes (410), the plurality of the sound inlet holes (410) are linearly spaced along the length direction of the corresponding muffler cavity (300), and the entrance areas of the plurality of the sound inlet holes (410) increase or decrease along the second direction.
6. The sound absorbing panel according to claim 5, characterized in that: The entrance areas of the plurality of sound inlet holes (410) first increase and then decrease, or first decrease and then increase, along the second direction.
7. The sound absorbing panel according to claim 6, characterized in that: The entrance areas of the plurality of sound inlet holes (410) change periodically along the second direction.
8. The sound absorbing panel according to any one of claims 1 to 4, characterized in that: The sound-proofing unit (200) comprises a support plate (210) vertically connected to the substrate (100) and a vibration fin (220) fixed to one end of the support plate (210); the adjacent vibration fins (220) and support plates (210) and the substrate (100) form the silencing chamber (300).
9. The sound absorbing panel according to claim 8, characterized in that: The sizes of the different silencing cavities (300) are not completely the same, and the size of the silencing cavity (300) is proportional to the inlet area of the corresponding sound inlet channel (400).
10. The sound absorbing panel according to claim 8, characterized in that: The width of the vibration fin (220) is proportional to the volume of the silencer cavity (300).