Decorative sound insulation and absorption structure

Abstract

The utility model discloses a decorative sound insulation and absorption structure which comprises a supporting installation structure, an outer decorative sound insulation module and an inner sound absorption structure. The outer decoration sound insulation module is sequentially provided with a decoration color steel plate, a damping sound insulation layer and a force bearing frame from outside to inside, the inner sound absorption structure is installed on the force bearing frame, and a cavity is reserved between the inner sound absorption structure and the damping sound insulation layer; the outer decoration sound insulation modules are installed on the outer side of the supporting installation structure, gaps of about 10 mm are reserved between the outer decoration sound insulation modules, elastic damping materials are filled in the outer decoration sound insulation modules, and black structural adhesives are used for filling the gaps outside the outer decoration sound insulation modules. The decorative sound insulation and absorption structure can be used as a sound barrier, an equipment sound insulation cover and a ventilation and noise elimination structure.

Description

Technical Field

[0001] The utility model relates to a noise control technology, in particular to a decorative sound insulation and sound absorption structure capable of reducing noise propagation. Background Art

[0002] Sound insulation and noise reduction are achieved by using materials, components, or structures to block airborne noise, thereby creating a quieter environment. These materials (components, structures) are called sound insulation materials (sound insulation components, sound insulation structures). The decibel difference between the incident sound energy on one side of the material and the transmitted sound energy on the other side is the material's sound insulation value. The airborne sound insulation value of a homogeneous single-layer material follows the "mass law," meaning that higher mass and thicker materials provide better sound insulation. Surface density is directly proportional to sound insulation value and the frequency of the sound wave. For every doubling of mass or a doubling of frequency, sound insulation value increases by approximately 6dB. All sound insulation materials have a natural frequency. When the frequency of the sound wave matches the natural frequency of the sound insulation material, the entire sound insulation structure resonates and coincides, significantly reducing sound insulation at that frequency—the so-called sound insulation dip. If a single-layer structure is divided into two layers, with a thick air layer between them, forming a hollow sound insulation structure, the elasticity of the air layer results in superior sound insulation performance compared to a single-layer solid structure. As the air layer increases, the additional sound insulation becomes higher, thus breaking through the constraints of the mass law.

[0003] Sound absorption is an effective measure for blocking and reducing sound transmission. Using sound-absorbing materials or structures to decorate the walls of a machine room, or hanging sound absorbers within the interior, can absorb some of the sound energy emitted by the noise source that hits it, reducing the reflected sound. Receivers then hear only the direct sound and the dampened reverberation, lowering the overall noise level. In architectural acoustics and noise control projects, sound absorption is the primary method for reducing reverberation and noise levels.

[0004] Noise control technical measures should not affect the operation of the equipment, and should meet the requirements of ventilation, lighting, landscaping, environmental protection and service life. Summary of the Invention

[0005] In order to overcome the shortcomings of existing sound-absorbing materials that cannot meet the requirements of full-frequency absorption and have poor decorative properties, the utility model provides a decorative sound insulation and sound absorption structure. The decorative sound insulation and sound absorption structure not only has the advantages of high high-frequency sound absorption coefficient of porous sound-absorbing materials, but also has good sound absorption characteristics for low frequencies. It also has good decorative performance and environmental adaptability, saves space for sound-absorbing material installation, and has a simple installation process.

[0006] The technical solution employed by the present invention to solve the technical problem is a decorative sound insulation and absorption structure comprising a supporting and mounting structure, an external decorative sound insulation module, and an internal sound absorption structure. The external decorative sound insulation module is sequentially arranged, from the outside inward, with a decorative color steel plate, a damping sound insulation layer, and a load-bearing frame. The internal sound absorption structure is mounted on the load-bearing frame, with a cavity between the internal sound absorption structure and the damping sound insulation layer. The cavity between the internal sound absorption structure and the damping sound insulation layer is closely related to the sound absorption performance of the porous material and the installation conditions. When a cavity is left behind the porous material, the sound absorption effect is similar to that of a cavity filled with the same material. At this point, the mid- and low-frequency sound absorption performance is improved compared to when the material is attached to a hard surface. The sound absorption coefficient increases with the thickness of the air layer. Under normal incidence, the sound absorption at this frequency reaches its maximum when the cavity depth d = λ / 4, 3λ / 4, ... (that is, odd multiples of a quarter wavelength). This is because in this case, the vibration velocity of air molecules near the sound-absorbing material is at its maximum due to the interference between the incident and reflected waves. The purpose of the cavity behind the porous material is that sound waves propagate at different speeds in different media, causing hysteresis and attenuation in the porous material. After passing through the porous material, the sound wave enters a different medium (the air layer). At the interface between one medium and another, reflection occurs. The sound wave is reflected and refracted between the wall and the air layer, then enters a different medium (the sound-absorbing material). The sound energy is accelerated in the process of entering and exiting the different media, thereby increasing the sound absorption coefficient of the porous material and improving its low-frequency sound absorption performance.

[0007] The exterior sound insulation modules are installed outside the supporting mounting structure, leaving a gap of approximately 10mm between them. The gaps are filled with elastic damping material and sealed with black structural adhesive. The decorative sound insulation and absorption structure can serve as a sound barrier, equipment soundproofing enclosure, and ventilation muffler. The color of the color-coated steel plate harmonizes with the surrounding color, creating a decorative effect similar to that of decorative aluminum-plastic panels. This harmonious color enhances the visual appeal of the decorative sound insulation and absorption structure.

[0008] The internal sound-absorbing structure includes sound-absorbing panels, waterproof and sound-permeable membranes, and perforated panels. The perforated panels are made of PVC sheet perforated coils or flame-retardant fiberglass sheet perforated coils. Compared to conventional galvanized perforated panels, these panels offer improved corrosion resistance and reduced weight. The damping and sound-insulating layer includes damping and sound-insulating coatings or damping and sound-insulating felt.

[0009] The thickness of the cavity between the internal sound-absorbing structure and the damping sound-insulating layer, the specific gravity of the sound-absorbing panel, and the thickness of the waterproof sound-permeable membrane are determined based on the spectral characteristics of the noise source. When the noise source is primarily low-frequency, increasing the cavity thickness, specific gravity of the sound-absorbing panel, and the thickness of the waterproof sound-permeable membrane can improve absorption of low-frequency sound waves. The specifications of the exterior decorative sound insulation module should be adapted to the usable area of ​​the overall decorative sound insulation and absorption structure, and the color and shape of the exterior decorative color-coated steel plate should be adapted to the surrounding landscape.

[0010] The beneficial effects of this utility model are that it not only has the advantages of high high-frequency sound absorption coefficient of porous sound-absorbing materials, but also has good sound absorption characteristics for low frequencies, achieving the purpose of full-frequency sound absorption. It also has good decorative properties and environmental adaptability, saves space for sound-absorbing material installation, and is simple to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 It is a longitudinal sectional structural diagram of an embodiment of a decorative sound insulation and sound absorption structure.

[0013] Figure 2 yes Figure 1 Look at the structural diagram. DETAILED DESCRIPTION

[0014] In the figure, 1. Support and installation structure, 11. Elastic damping material, 12. Structural adhesive, 2. External decorative sound insulation module, 21. Decorative color steel plate, 22. Damping sound insulation layer, 23. Load-bearing frame, 24. Gap, 3. Internal sound absorption structure, 31. Sound-absorbing plate, 32. Cavity, 33. Waterproof sound-permeable film, 34. Perforated protective panel, Figure 1 、 2 In the embodiment shown, a decorative sound insulation and sound absorption structure comprises a supporting and mounting structure (1), an external decorative sound insulation module (2), and an internal sound absorption structure (3). The external decorative sound insulation module (2) is provided with a decorative color steel plate (21), a damping sound insulation layer (22), and a load-bearing frame (23) in sequence from the outside to the inside, the internal sound absorption structure (3) is installed on the load-bearing frame (23), and a cavity (32) is left between the internal sound absorption structure (3) and the damping sound insulation layer (22); the external decorative sound insulation module (2) is installed on the outside of the supporting and mounting structure (1), and a gap (24) of about 10 mm is reserved between the external decorative sound insulation modules (2), the elastic damping material (11) is filled inside, and the gap (24) is filled outside with black structural glue (12); the decorative sound insulation and sound absorption structure can be used as a sound barrier, a sound insulation cover for equipment, and a ventilation and sound elimination structure.

[0015] The internal sound absorption structure (3) includes a sound absorption plate (31), a waterproof sound-permeable film (33), and a perforated protective panel (34). The perforated protective panel (34) is a PVC sheet perforated coiled material or a flame-retardant glass fiber sheet perforated coiled material. The damping sound insulation layer (22) includes a damping sound insulation coating or a damping sound insulation felt.

[0016] According to the spectrum characteristics of the noise source, the thickness of the cavity (32) between the internal sound absorption structure (3) and the damping sound insulation layer (22), the bulk density of the sound absorption plate (31), and the thickness of the waterproof sound permeable film (33) are determined. The specifications of the external decorative sound insulation module (2) are adapted to the use area of ​​the overall decorative sound insulation and sound absorption structure, and the color and shape of the decorative color steel plate (21) are adapted to the surrounding landscape.

[0017] It should be understood that various changes can be made to the above embodiments without departing from the scope of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A decorative sound insulation and sound absorption structure, comprising a supporting and mounting structure, an external decorative sound insulation module, and an internal sound absorption structure, characterized by: The exterior decorative sound insulation module is sequentially provided with a decorative color steel plate, a damping sound insulation layer, and a load-bearing frame from the outside to the inside. The interior sound absorption structure is installed on the load-bearing frame, and a cavity is left between the interior sound absorption structure and the damping sound insulation layer. The exterior decorative sound insulation module is installed on the outside of the supporting installation structure. A gap of about 10 mm is reserved between the exterior decorative sound insulation modules, and the gap is filled with elastic damping material inside and black structural adhesive outside. The decorative sound insulation and sound absorption structure can be used as a sound barrier, equipment sound insulation cover, and ventilation and noise reduction structure.

2. The decorative sound insulation and sound absorption structure according to claim 1, characterized in that: The internal sound absorption structure comprises a sound absorption plate, a waterproof sound-permeable film, and a perforated protective panel.

3. The decorative sound insulation and sound absorption structure according to claim 2, characterized in that: The perforated protective panel is a PVC sheet perforated coiled material or a flame retardant glass fiber sheet perforated coiled material.

4. The decorative sound insulation and sound absorption structure according to claim 1, characterized in that: The damping sound insulation layer includes damping sound insulation paint or damping sound insulation felt.

5. The decorative sound insulation and sound absorption structure according to claim 1, characterized in that: According to the spectrum characteristics of the noise source, determine the thickness of the cavity between the internal sound-absorbing structure and the damping sound insulation layer, the bulk density of the sound-absorbing board, and the thickness of the waterproof and sound-permeable film.

6. The decorative sound insulation and sound absorption structure according to claim 1, characterized in that: The specifications of the exterior decorative sound insulation module are adapted to the use area of ​​the overall decorative sound insulation and sound absorption structure, and the color and shape of the decorative color steel plate are adapted to the surrounding landscape.

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