Sound insulation testing device for plates
By designing a sound insulation testing device for multi-layer composite sound insulation structures, the problems of high cost and poor stability of existing devices have been solved, realizing low-cost and high-precision sound insulation testing of board materials, which is applicable to a variety of materials and structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-03-27
AI Technical Summary
Existing sound insulation testing devices are costly to build and have poor measurement stability, making it difficult to accurately determine the sound insulation performance of the panels.
A sound insulation testing device was designed, comprising a semi-enclosed enclosure, a sound generator, and a sound level meter. The enclosure contains a multi-layered composite sound insulation structure, including a mass layer, an outer sound insulation layer, a damping layer, a sound-absorbing layer, and an anti-reverberation layer, for testing the sound insulation performance of the board material.
It achieves low-cost, high-consistency, and high-precision sound insulation testing, is applicable to a variety of materials and structures, is suitable for testing small-sized panels, and provides highly accurate test results.
Smart Images
Figure CN224051445U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sound insulation test technical field especially relates to a sound insulation testing device for board. BACKGROUND
[0002] The sound insulation performance of board is the key to judge its quality, and the sound insulation performance of board needs to be measured in the use and research of board. In the measurement process, the sound insulation measuring device will directly affect the precision and accuracy of measurement.
[0003] The existing sound insulation testing device is divided into two kinds, one is reverberation chamber measurement method, needs to use larger space to realize, this kind of measurement method is high in accuracy, and good in test consistency, but needs professional reverberation chamber, and the construction cost of reverberation chamber is high. The other is to test with impedance tube, and this kind of method is low in construction cost and simple in operation, but the sound insulation test consistency is poor, and it is difficult to judge the stability of low frequency measurement value, and it is more suitable for porous materials. UTILITY MODEL CONTENTS
[0004] (I) technical problem to be solved
[0005] In view of the above-mentioned defects and deficiencies of the prior art, the utility model provides a sound insulation testing device for board, which solves the technical problems of high construction cost and poor measurement value stability.
[0006] (II) technical scheme
[0007] In order to achieve the above purpose, the main technical scheme of the utility model comprises:
[0008] The utility model embodiment provides a sound insulation testing device for board, which comprises a semi-closed box body with a containing space, a sound generator and a sound level meter, the box body comprises a box shell with an open top, a multilayer composite sound insulation structure is arranged on the inner wall of the box shell and surrounds to form the containing space, the height of the multilayer composite sound insulation structure is lower than the box shell, the sound generator is arranged in the containing space, and the board to be measured can be placed on the top of the multilayer composite sound insulation structure to form a closed space with the multilayer composite sound insulation structure, the multilayer composite sound insulation structure comprises a mass layer, an outer sound insulation layer, a damping layer, a sound absorption layer, an inner sound insulation layer and an anti-reverberation layer arranged in sequence from outside to inside, and the sound level meter is arranged directly above the box body.
[0009] Preferably, the box body further comprises four first connecting plates, the four first connecting plates are respectively fixedly connected with the four side walls of the box shell, the sound insulation testing device further comprises four pressing mechanisms, the pressing mechanisms correspond to the first connecting plates one by one, one end of the pressing mechanism is detachably connected with the first connecting plate, and the other end is arranged above the multilayer composite sound insulation structure to press the board to be measured.
[0010] Preferably, the pressing mechanism comprises a connecting unit, a threaded rod and a pressing plate; the bottom of the connecting unit is detachably connected with the first connecting plate, a threaded hole is formed in one end of the top of the connecting unit, the threaded rod is L-shaped, the vertical end of the threaded rod is screwed into the threaded hole, the pressing plate is located below the threaded rod, and the pressing plate can be placed on the plate to be tested, and the horizontal end of the threaded rod is rotated to drive the threaded rod to descend, so as to press the pressing plate and then press the plate to be tested.
[0011] Preferably, the thickness of the pressing plate is smaller than that of the plate to be tested, and the sound level meter is not located directly above the pressing plate.
[0012] Preferably, the sound insulation testing device further comprises a support frame; one end of the support frame is detachably connected with the first connecting plate, and the other end is detachably connected with the sound level meter.
[0013] Preferably, the outer sound insulation layer and the inner sound insulation layer are selected from one of a gypsum board, a glass magnesium board and a cement fiber board; the thickness of the sound insulation layer is smaller than that of the inner sound insulation layer.
[0014] Preferably, the damping layer and the sound insulation layer are fixedly connected through polyurethane glue; the material of the damping layer is a damping material; and the material of the anti-reverberation layer is a sound absorption wedge.
[0015] Preferably, the sound absorption layer comprises, from outside to inside, a ceramic fiber board and a rock wool layer; the ceramic fiber board and the rock wool layer are fixedly connected through foaming glue or structural glue.
[0016] Preferably, the box further comprises a rubber layer; the bottom of the rubber layer is connected with the top of the multi-layer composite sound insulation structure, and the top of the rubber layer can place the plate to be tested.
[0017] Preferably, the box further comprises four groups of moving units; the four groups of moving units are respectively arranged at the bottom corners of the box shell; each moving unit comprises a roller, a connecting shaft and two second connecting plates; the two second connecting plates are arranged in parallel along the vertical direction; the top ends of the two second connecting plates are connected with the bottom end of the box shell; the bottom ends of the two second connecting plates are connected through the connecting shaft; the roller is sleeved on the connecting shaft and rotationally connected with the connecting shaft; and the roller drives the box shell to move on the horizontal plane.
[0018] (Three) beneficial effects
[0019] The beneficial effects of the utility model are:
[0020] The sound insulation testing device for the plate comprises a box, a sound generator and a sound level meter, the device has simple structure, is easy to reproduce and has low cost.
[0021] Because the multi-layered composite sound insulation structure inside the enclosure comprises, from the outside in, a mass layer, a sound insulation layer, a damping layer, a sound-absorbing layer, an inner sound insulation layer, and an anti-reverberation layer, integrating sound absorption, sound insulation, and damping vibration reduction into a single enclosure design, this enclosure structure boasts high sound insulation and superior soundproofing performance, enabling the testing of materials with high sound insulation. Compared to existing impedance tube testing methods, this device is suitable for sound insulation testing of most materials and structures, offering wider application. Furthermore, the height of the multi-layered composite sound insulation structure is lower than the enclosure shell, with varying heights around the perimeter, facilitating the placement and testing of small-sized materials. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of a sound insulation testing device for sheet metal according to the present invention;
[0023] Figure 2 This is an exploded view of a sound insulation testing device for sheet metal according to the present invention.
[0024] Figure 3 This is a top view schematic diagram of a sound insulation testing device for sheet metal according to the present invention;
[0025] Figure 4 for Figure 3 A cross-sectional view at point AA.
[0026] [Explanation of Labels in the Attached Image]
[0027] 1: Enclosure; 11: Enclosure shell; 12: Multi-layer composite sound insulation structure; 121: Mass layer; 122: Outer sound insulation layer; 123: Damping layer; 124: Sound absorption layer; 125: Inner sound insulation layer; 126: Anti-reverberation layer; 13: First connecting plate; 14: Moving unit; 141: Roller; 142: Connecting shaft; 143: Second connecting plate; 15: Rubber layer;
[0028] 2: Clamping mechanism; 21: Connecting unit; 211: Support base; 212: Connecting frame; 213: Positioning bolt; 22: Threaded rod; 23: Clamping plate;
[0029] 3: Support frame; 4: Sound generator; 5: Sound level meter;
[0030] a: Board material. Detailed Implementation
[0031] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0032] like Figure 1As shown, the embodiment provides a sound insulation testing device for plate, the sound insulation testing device comprises a semi-closed box 1 with a containing space, a sound generator 4 and a sound level meter 5. The opening of the box 1 is upward, the sound generator 4 is arranged in the containing space of the box 1, and the sound level meter 5 is arranged directly above the box 1. The device structure is simple, easy to reproduce and low in cost. Due to the simple testing steps and high consistency, the sound insulation effect comparison and judgment in the laboratory stage can be carried out, which is simple and convenient and is helpful for the research of sound insulation plate in the laboratory.
[0033] It should be noted that the sound generator 4 and the sound level meter 5 involved in the application are prepared by using the prior art, which will not be described here.
[0034] As shown in the figure, Figure 2 The box 1 comprises a box shell 11 with an open top, a multilayer composite sound insulation structure 12 is arranged on the inner wall of the box shell 11 and surrounds to form a containing space, in order to facilitate the placement and testing of small-size plate a, the height of the multilayer composite sound insulation structure 12 is lower than that of the box shell 11, the sound generator 4 is arranged in the containing space, and the plate a to be tested can be placed on the top of the multilayer composite sound insulation structure 12 to form a closed space together with the multilayer composite sound insulation structure 12.
[0035] As a preferred embodiment of the utility model, the material of the box shell 11 is stainless steel.
[0036] As shown in the figure, Figure 4 The multilayer composite sound insulation structure 12 comprises a mass layer 121, an outer sound insulation layer 122, a damping layer 123, a sound absorption layer 124, an inner sound insulation layer 125 and an anti-reverberation layer 126 arranged in sequence from outside to inside. The box integrates sound absorption, sound insulation and damping shock, has high sound insulation amount, better sound insulation effect, and can test plate a with high sound insulation amount. Compared with the existing impedance tube test, the device is suitable for sound insulation test of most materials and structures and has wider application.
[0037] Preferably, the mass layer 121 is a mixture of cement, sand and fiber material, and the fiber material is selected from one or a mixture of ceramic fiber, polypropylene fiber, glass fiber and basalt fiber, but the mixture is only a physical mixture. Since the mass layer 121 comprises fiber material, the strength and bending resistance of the mass layer 121 can be increased, the durability can be improved, and the gap can be reduced.
[0038] It should be noted that the mixture of cement, sand and fiber material is only a physical mixture and does not occur chemical reaction.
[0039] In order to improve the sound insulation performance of the device, and facilitate the damping layer 123 and the anti-reverberation layer 126 to be pasted to the inner side of the outer sound insulation layer 122 and the inner sound insulation layer 125 respectively, the outer sound insulation layer 122 and the inner sound insulation layer 125 are selected from one of a gypsum board, a glass magnesium board and a cement fiber board. The outer sound insulation layer 122 can support the mass layer 121, and the inner sound insulation layer 125 can block the lateral propagation of the internal sound.
[0040] Further, in order to improve the low-frequency sound insulation and improve the space utilization, the thickness of the outer sound insulation layer 122 is less than the thickness of the inner sound insulation layer 125.
[0041] The damping layer 123 is fixedly connected with the outer sound insulation layer 122 through polyurethane glue, and the material of the damping layer 123 is a damping material. The damping layer 123 functions to weaken the matching effect and improve the overall sound insulation performance.
[0042] Specifically, the damping material is a damping sound insulation felt, and every inch of PVC material in the damping sound insulation felt is fully and uniformly mixed with plastic PVC, fine iron powder, quartz powder and heavy calcium carbonate.
[0043] Further, the sound absorption layer 124 includes a ceramic fiber board and a rock wool layer connected in sequence from the outside to the inside, wherein the densities of the ceramic fiber board and the rock wool layer are different, the density of the ceramic fiber board is 0.3g / cm 3 , and the density of the rock wool is 0.12g / cm 3 . The sound absorption layer 124 with different densities increases the interface, and improves the sound absorption effect through increasing the emission times and the synergistic effect.
[0044] In order to prevent the ceramic fiber board and the rock wool layer from having gaps affecting the effect, the ceramic fiber board and the rock wool layer are fixedly connected in combination through foaming glue or structural glue.
[0045] In order to eliminate reflected sound and simulate free sound field conditions, the material of the anti-reverberation layer 126 is a sound absorption wedge.
[0046] As a preferred embodiment of the utility model, the thickness of the mass layer 121 is 20mm, the thickness of the outer sound insulation layer 122 is 12mm, the thickness of the damping layer 123 is 2mm, the thickness of the ceramic fiber board is 12mm, the thickness of the rock wool is 30mm, the thickness of the inner sound insulation layer 125 is 15mm, and the thickness of the anti-reverberation layer 126 is 50mm. The density of the sound insulation layer 122 is 0.7-1g / cm 3 , and the density of the damping layer 123 is 0.4g / cm 3 .
[0047] When the to-be-tested board a is placed on the top of the box body 1, in order to prevent the risk of not being completely attached, such as Figure 1 and Figure 2As shown, the sound insulation testing device further comprises four pressing mechanisms 2, and the box 1 further comprises four first connecting plates 13, which are respectively fixedly connected with the four side walls of the box shell 11. The pressing mechanisms 2 correspond to the first connecting plates 13 one by one, one end of each pressing mechanism 2 is detachably connected with a first connecting plate 13, and the other end is arranged above the multi-layer composite sound insulation structure 12 to be able to press the to-be-tested board a.
[0048] In order to prevent the to-be-tested board a and the sound insulation testing device from having a gap during the test, thereby affecting the test result, as shown in Figure 2 As shown, the pressing mechanism 2 comprises a connecting unit 21, a threaded rod 22 and a pressing plate 23. The bottom of the connecting unit 21 is detachably connected with the first connecting plate 13, a threaded hole is formed in one end of the top of the connecting unit 21, the threaded rod 22 is L-shaped, the vertical end of the threaded rod 22 is screwed into the threaded hole, and the pressing plate 23 is located below the threaded rod 22 and can be placed on the to-be-tested board a. By rotating the horizontal end of the threaded rod 22 to drive the threaded rod 22 to descend, the pressing plate 23 is pressed, and then the to-be-tested board a is pressed, so as to improve the accuracy and consistency of the test.
[0049] Specifically, the connecting unit 21 comprises a supporting base 211, a connecting frame 212 and a positioning bolt 213. The supporting base 211 is arranged on the first connecting plate 13 and detachably connected with the first connecting plate 13. The connecting frame 212 is L-shaped, the vertical end of the connecting frame 212 is connected with the supporting base 211 through the positioning bolt 213, and a threaded hole is formed in the horizontal end of the connecting frame 212. The vertical end of the threaded rod 22 is screwed into the threaded hole.
[0050] Further, in order to prevent the pressing plate 23 from affecting the accuracy of the test data, the thickness of the pressing plate 23 is less than that of the to-be-tested board a, and the sound level meter 5 is not located directly above the pressing plate 23.
[0051] In order to make the test data more accurate, as shown in Figure 1 and Figure 3 As shown, the sound insulation testing device further comprises a supporting frame 3 for placing the sound level meter 5. Specifically, one end of the supporting frame 3 is detachably connected with the first connecting plate 13, and the other end is detachably connected with the sound level meter 5.
[0052] In order to further prevent sound leakage around, as shown in Figure 2 and Figure 4 As shown, the box 1 further comprises a rubber layer 15, the bottom of the rubber layer 15 is connected with the top of the multi-layer composite sound insulation structure 12, and the top of the rubber layer 15 is located at the bottom of the pressing plate 23.
[0053] In order to facilitate the movement of the sound insulation testing device, as shown in Figure 1As shown, the box body 1 further includes four groups of moving units 14, which are arranged at the bottom corners of the box body 1 respectively. The moving unit 14 includes a roller 141, a connecting shaft 142 and two second connecting plates 143, the two second connecting plates 143 are arranged in parallel in the vertical direction, the top ends of the two second connecting plates 143 are connected with the bottom end of the box body 1, the bottom ends of the two second connecting plates 143 are connected through the connecting shaft 142, the roller 141 is sleeved on the connecting shaft 142 and is rotationally connected with the connecting shaft 142, and the roller 141 drives the box body 1 to move on the horizontal plane.
[0054] The working process of the utility model is as follows: first, the loudspeaker 4 is opened, so that the loudspeaker 4 plays a sound source, and the sound level meter 5 is used to test the decibel value of the sound source; then, the plate a to be measured is placed on the top of the multilayer composite sound insulation structure 12; then, the pressing mechanism 2 presses the plate a to be measured; finally, the sound level meter 5 is used to test the decibel value of the sound source again, and the difference between the two decibel value data is taken as the sound insulation result of the plate a.
[0055] In the description of the utility model, it is to be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.
[0056] In the utility model, unless otherwise specifically defined and limited, the terms "installation", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.
[0057] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature is "above", "above" and "above" the second feature, which can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" the second feature, which can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.
[0058] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.
[0059] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A sound insulation testing apparatus for a panel, characterised in that, The sound insulation test device comprises a semi-closed box (1) with a containing space, a sound generator (4) and a sound level meter (5); The box (1) comprises a box shell (11) with an open top, a multilayer composite sound insulation structure (12) is arranged on the inner wall of the box shell (11) and encloses the containing space, the height of the multilayer composite sound insulation structure (12) is lower than that of the box shell (11), the sound generator (4) is arranged in the containing space, and the board (a) to be tested can be placed on the top of the multilayer composite sound insulation structure (12) to form a closed space together with the multilayer composite sound insulation structure (12); The multilayer composite sound insulation structure (12) comprises, from outside to inside, a mass layer (121), an outer sound insulation layer (122), a damping layer (123), a sound absorption layer (124), an inner sound insulation layer (125) and an anti-reverberation layer (126); The sound level meter (5) is arranged directly above the box (1).
2. The sound insulation test device according to claim 1, wherein: The box (1) further comprises four first connecting plates (13), and the four first connecting plates (13) are respectively fixedly connected with four side walls of the box shell (11); The sound insulation test device further comprises four pressing mechanisms (2); The pressing mechanisms (2) correspond to the first connecting plates (13) one by one, one end of each pressing mechanism (2) is detachably connected with a first connecting plate (13), and the other end is arranged above the multilayer composite sound insulation structure (12) to press the board (a) to be tested.
3. The sound insulation test device according to claim 2, wherein: The pressing mechanism (2) comprises a connecting unit (21), a threaded rod (22) and a pressing plate (23); The bottom of the connecting unit (21) is detachably connected with the first connecting plate (13), a threaded hole is formed in one end of the top of the connecting unit (21), the threaded rod (22) is L-shaped, the vertical end of the threaded rod (22) is screwed into the threaded hole, the pressing plate (23) is located below the threaded rod (22), and the pressing plate (23) can be placed on the board (a) to be tested; the horizontal end of the threaded rod (22) is rotated to drive the threaded rod (22) to descend, so as to press the pressing plate (23) and then press the board (a) to be tested.
4. The sound insulation test device according to claim 3, wherein: The thickness of the pressing plate (23) is less than the thickness of the board (a) to be tested, and the sound level meter (5) is not located directly above the pressing plate (23).
5. The sound insulation test device according to claim 4, wherein: The sound insulation test device further comprises a support frame (3); One end of the support frame (3) is detachably connected with the first connecting plate (13), and the other end is detachably connected with the sound level meter (5).
6. The sound insulation test device according to claim 1, wherein: The outer sound insulation layer (122) and the inner sound insulation layer (125) are selected from one of a gypsum board, a glass magnesium board and a cement fiber board. The thickness of the sound insulation layer (122) is less than the thickness of the inner sound insulation layer (125).
7. The sound insulation testing device of claim 1, wherein: The damping layer (123) and the sound insulation layer (122) are fixedly connected by polyurethane glue; The material of the damping layer (123) is damping material; The material of the sound absorption layer (126) is sound absorption wedge.
8. The sound insulation testing device of claim 1, wherein: The sound absorption layer (124) comprises a ceramic fiber plate and a rock wool layer connected in sequence from outside to inside; The ceramic fiber plate and the rock wool layer are fixedly connected by foaming glue or structural glue.
9. The sound insulation testing device of claim 2, wherein: The box (1) further comprises a rubber layer (15); The bottom of the rubber layer (15) is connected with the top of the multi-layer composite sound insulation structure (12), and the top of the rubber layer (15) can place the board (a) to be tested.
10. The sound insulation testing device of claim 1, wherein: The box (1) further comprises four groups of moving units (14); The four groups of moving units (14) are respectively arranged at the bottom corners of the box shell (11); The moving unit (14) comprises a roller (141), a connecting shaft (142) and two second connecting plates (143), the two second connecting plates (143) are arranged in parallel in the vertical direction, the top ends of the two second connecting plates (143) are connected with the bottom end of the box shell (11), the bottom ends of the two second connecting plates (143) are connected through the connecting shaft (142), the roller (141) is sleeved on the connecting shaft (142) and is rotationally connected with the connecting shaft (142), and the roller (141) drives the box shell (11) to move on the horizontal plane.