Sound insulation board

Abstract

The utility model discloses a sound insulation board, which belongs to the technical field of sound insulation boards and comprises a plurality of sound insulation units arranged in parallel. The sound insulation unit comprises a sound insulation frame, an elastic block, a mass block and a sound insulation thin plate, the middle of the sound insulation frame is hollowed out, the sound insulation thin plate is sealed on one side of the sound insulation frame, the elastic block is installed on the side, away from the sound insulation frame, of the sound insulation thin plate, and the mass block is arranged above the elastic block; the sound insulation thin plate is made of a metal hard material, and the sound insulation thin plate is made of a metal material, so that the sound insulation plate can improve the sound wave control precision and enhance the strength and durability of the sound insulation plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to sound insulation board technical field especially relates to a sound insulation board. BACKGROUND

[0002] Membrane acoustic metamaterial is a composite structure composed of multiple thin films, and the thickness and material properties of each thin film can be designed as needed. This structure enables membrane acoustic metamaterial to have excellent acoustic properties, such as negative refraction, phononic crystal effect, and acoustic lens effect. The sound insulation performance of large-size membrane acoustic metamaterial, especially at low frequencies, may decrease significantly compared to small-size samples. Therefore, in daily use, smaller membrane acoustic metamaterials are usually fixed together with frames to form large-size membrane acoustic metamaterials. Different thicknesses of thin films and different masses can be used in membrane acoustic metamaterials to control the sound insulation effect of different frequency bands.

[0003] Prior art such as Chinese patent publication No. CN220895182U discloses an assembled acoustic metamaterial sound insulation module, comprising: a plurality of first frames, a plurality of second frames, a first frequency film arranged in the first frame, a second frequency film arranged in the second frame, a mass block arranged at the center of the first frequency film and the second frequency film, and a clamping device arranged on the frame; the clamping device arranged on the first frame comprises a frame body, a side socket arranged at the left end of the frame body, a bottom block arranged at the bottom end of the frame body, a flat block arranged at the front end of the frame body, a top socket arranged at the top end of the frame body, and a side block arranged at the right end of the frame body; the top end, bottom end and front end of the frame body are provided with a shaft hole.

[0004] The acoustic metamaterial sound insulation module in the above-mentioned patent adopts the form of frame and thin film, and the mechanical strength and durability of the thin film are limited, which may be easily torn, deformed or aged due to external force, stress concentration or long-term use, thereby affecting the overall performance and service life of the metamaterial. UTILITY MODEL CONTENT

[0005] The utility model provides a sound insulation board, increases overall performance, improves service life.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A sound insulation board, comprising a plurality of sound insulation units arranged side by side; the sound insulation unit comprises a sound insulation frame, an elastic block, a mass block and a sound insulation board, the middle part of the sound insulation frame is hollow, the sound insulation board is closed on one side of the sound insulation frame, the elastic block is installed on the side of the sound insulation board away from the sound insulation frame, and the mass block is arranged above the elastic block; the sound insulation board is made of metal hard material.

[0008] A preferred technical solution of the present invention is that the mass block is filled with damping particles.

[0009] A preferred technical solution of the present invention is that the filling rate of the damping particles is between 60% and 100%.

[0010] An optimal technical solution of the present invention is that the mass block is configured to be solid.

[0011] A preferred technical solution of the present invention is that an elastic block is provided between the mass block and the sound insulation sheet.

[0012] A preferred technical solution of the present invention is that the elastic block is made of rubber material.

[0013] A preferred technical solution of the present invention is that the area of ​​the mass block is less than 1 / 10 of the area of ​​the sound insulation sheet.

[0014] The preferred technical solution of the present invention is that the stiffness of the elastic block is set to k, the weight of the mass block is set to m, and the first-order frequency of the sound insulation sheet is set to ω, wherein k=βω 2 m.

[0015] A preferred technical solution of the present invention is that the size of the elastic block matches the size of the mass block.

[0016] A preferred technical solution of the present invention is that the sound insulation frame is made of a flexible material.

[0017] The beneficial effects of the utility model are:

[0018] The utility model provides a sound insulation board, in which the sound insulation thin plate is set to be a metal material, so that the sound insulation board can improve the accuracy of sound wave control and enhance the strength and durability of the sound insulation board. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of the overall structure of the sound insulation board provided in a specific embodiment of the present utility model;

[0020] Figure 2 This is a rear view of the overall structure of the sound insulation board provided in a specific embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the overall structure of the sound insulation unit of the sound insulation board provided in a specific embodiment of the present utility model;

[0022] Figure 4 It is a schematic diagram of the overall structure of the sound insulation unit of the sound insulation board provided in a specific embodiment of the present utility model;

[0023] Figure 5 It is a front view of the overall structure of the sound insulation unit of the sound insulation board provided in a specific embodiment of the present utility model;

[0024] Figure 6 In Example 1 Figure 5 AA cross-section of

[0025] Figure 7 In Example 2 Figure 5 AA cross-section of

[0026] In the picture:

[0027] 1. Sound insulation unit; 101. Sound insulation frame; 102. Mass block; 1021. Damping particles; 103. Sound insulation sheet; 104. Elastic block. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0029] like Figure 1-5 As shown, the present invention provides a sound insulation board, in which a plurality of sound insulation units 1 are arranged. The sound insulation unit 1 includes a sound insulation frame 101, an elastic block 104, a mass block 102, and a sound insulation sheet 103. The middle portion of the sound insulation frame 101 is hollowed out, and the sound insulation sheet 103 is provided on one side of the sound insulation frame 101. The elastic block 104 is provided on a side of the sound insulation sheet 103 away from the sound insulation frame 101, and the mass block 102 is provided above the elastic block 104.

[0030] Among them, the sound insulation sheet 103 is made of a metallic hard material. By replacing the original substrate film with a hard and thin material, the hard material has a higher sound velocity (i.e., the speed at which sound waves propagate in the material), which means that they have a stronger control over the phase and path of the sound waves. Using a hard material instead of a substrate film can more accurately control the propagation direction, speed, and reflection angle of the sound waves, thereby achieving more complex sound wave manipulation effects. In addition, hard materials generally have higher mechanical strength and fatigue resistance than flexible materials, which makes metamaterials more durable in practical applications. Hard materials can reduce deformation or damage of the material and extend the service life of the metamaterial. Hard materials are more stable to environmental changes (such as temperature, humidity, chemicals, etc.), which can reduce the impact of the external environment on the acoustic properties of the material. For acoustic metamaterials that need to be used in harsh environments, hard substrates can maintain more stable performance. Hard materials have a higher eigenfrequency, which enables metamaterials using them as substrates to more effectively manipulate high-frequency sound waves. For certain application scenarios (such as ultrasonic imaging and acoustic wave filters), hard materials can broaden the frequency response range of metamaterials and achieve higher acoustic performance.

[0031] The stiffness of the elastic block 104 is set as k, the weight of the mass block 102 is set as m, and the 1st order frequency of the soundproof sheet 103 is set as ω, where k = βω 2 m, and β in this system represent a specific proportional factor that links the stiffness of the elastic block, the mass of the mass block, and the 1st order frequency of the soundproof sheet, which depends on the specific design of the soundproof sheet.

[0032] In order to make the whole have a tunable resonance frequency, the elastic block 104 is made of rubber material. By the elastic block 104, the vibration transmission between the soundproof film and the mass block 102 can be improved, the amplitude of the vibration energy transmitted from the mass block 102 to the film is reduced, and the vibration isolation performance is improved. Moreover, by making the elastic block 104 of rubber material, internal energy dissipation will occur when bearing deformation, thereby playing a damping effect. This damping effect helps to suppress the high-frequency vibration and resonance phenomenon of the system, and improves the stability and anti-interference ability of the acoustic metamaterial.

[0033] At the same time, the material of the soundproof frame 101 is set as a flexible material, which can easily adapt to uneven or irregular surfaces, so that the acoustic unit can be integrated into structures of various complex shapes, and the flexible material can deform and recover more quickly when dealing with dynamic loads, so that the acoustic system can maintain stable performance in a rapidly changing environment.

[0034] The area of the mass block 102 is less than 1 / 10 of the area of the soundproof sheet 103. Since the mass block 102 has a small area and light weight, the response speed of the system is faster, so that the soundproof sheet 103 can respond more quickly and is suitable for processing high-frequency sound waves or vibration signals. At the same time, the size of the elastic block 104 and the mass block 102 is the same.

[0035] Embodiment 1

[0036] As shown in Figure 6 , the mass block 102 is set as solid. The higher the density of the material, the greater the mass per unit volume, which can significantly affect the resonance frequency of the acoustic unit.

[0037] Embodiment 2

[0038] As shown in Figure 7 , the difference between this embodiment and embodiment 1 is that the mass block 102 is set as hollow and filled with 60%-100% of the damping particles 1021 inside.

[0039] By filling with damping particles 1021, vibration energy can be absorbed through mechanisms such as friction, collision, and deformation, thereby effectively reducing the resonance peak of the system.

[0040] The utility model discloses the description through the preferred embodiment, and the person skilled in the art knows that various changes or equivalent replacement can be made to these features and embodiments without departing from the spirit and scope of the utility model. The utility model is not limited by the specific embodiments disclosed here, and other embodiments falling within the claims of the present application all belong to the scope of protection of the utility model.

Claims

1. A sound insulation board, characterized in that: It comprises a plurality of sound insulation units (1) arranged in parallel; The sound insulation unit (1) comprises a sound insulation frame (101), a sound insulation block (104), a mass block (102) and a sound insulation sheet (103); the middle portion of the sound insulation frame (101) is hollowed out; the sound insulation sheet (103) is enclosed on one side of the sound insulation frame (101); the sound insulation block (104) is mounted on a side of the sound insulation sheet (103) away from the sound insulation frame (101); and the mass block (102) is arranged above the sound insulation block (104); The sound insulation sheet (103) is made of a metallic hard material.

2. The sound insulation board according to claim 1, characterized in that: The mass block (102) is filled with damping particles (1021).

3. The sound insulation board according to claim 2, characterized in that: The filling rate of the damping particles (1021) is between 60% and 100%.

4. The sound insulation board according to claim 1, characterized in that: The mass block (102) is configured to be solid.

5. The sound insulation board according to claim 1, characterized in that: The elastic block (104) is made of rubber material.

6. The sound insulation board according to claim 1, characterized in that: The area of ​​the mass block (102) is less than 1 / 10 of the area of ​​the sound insulation sheet (103).

7. The sound insulation board according to claim 1, characterized in that: The stiffness of the elastic block (104) is set to k, the weight of the mass block (102) is set to m, and the first-order frequency of the sound insulation sheet (103) is set to ω, wherein k=βω 2 m.

8. The sound insulation board according to claim 1, characterized in that: The size of the elastic block (104) matches the size of the mass block (102).

9. The sound insulation board according to claim 1, characterized in that: The sound insulation frame (101) is made of flexible material.

Images