CN214657903U

CN214657903U - Frequency-adjustable sound-absorbing panel

Info

Publication number: CN214657903U
Application number: CN202023121288.8U
Authority: CN
Inventors: 吴晓莉
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-11-09
Anticipated expiration: 2030-12-22

Abstract

The utility model provides a frequency-adjustable sound-absorbing panel, which comprises a perforated plate, a plug board, a boss and a bottom plate; vertical through holes are uniformly drilled in the perforated plate, a plurality of thin plates are spliced vertically and horizontally to form a cuboid cavity with the same volume, the lug boss consists of a series of cuboids with the same volume as the cuboid cavity, and slots are formed in gaps among the cuboids; the perforated plate is bonded with the inserting plate, and the lug boss is bonded with the bottom plate; through-hole and cuboid cavity UNICOM, the picture peg inserts in the slot between the boss, forms a plurality of parallel arrangement's Helmholtz resonator unit, the picture peg slides along the slot, changes the size of Helmholtz resonator unit cavity volume. The utility model discloses can be according to hall reverberation time's requirement, adjust the cavity volume of Helmholtz resonator in a flexible way to reach the purpose of adjusting sound absorption frequency, and abatvoix overall structure is simple, convenient operation.

Description

Frequency-adjustable sound-absorbing panel

Technical Field

The utility model relates to a sound absorbing material especially relates to a sound absorption panel, mainly used hall is indoor to fall and is fallen the noise.

Background

The traditional sound-absorbing plate used in the hall room is fixed, once the sound-absorbing plate is installed, the sound-absorbing frequency band and the sound-absorbing performance are determined, and the reverberation time is not adjustable. Generally, meeting or discharge shadow in a hall room requires more sound absorption, so that the reverberation time is short, and the heard sound is clearer; and the artistic performance requires that the sound absorption in the hall is less, namely the reverberation time is longer, so that the heard sound is richer. In order to achieve sound absorption for various purposes and maintain the optimal acoustic effect, a frequency-adjustable sound absorber needs to be installed indoors, and the optimal reverberation time for different purposes can be obtained by adjusting the sound absorption frequency.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a simple structure, can adjust sound absorption frequency's sound absorption panel in a flexible way.

Therefore, the utility model discloses a technical scheme as follows:

a frequency-adjustable sound-absorbing panel comprises a perforated plate, an inserting plate, a boss and a bottom plate, wherein the inserting plate is formed by vertically and horizontally splicing a plurality of thin plates to form a cuboid cavity with the same volume, vertical through holes are drilled in the perforated plate and are uniformly distributed and communicated with the cavity formed by the inserting plate; the lug boss is composed of a series of cuboids with the same volume, the cuboids are arranged on the bottom plate at equal intervals, and slots are formed in gaps among the cuboids; the volume of a cavity defined by the inserting plates is the same as that of the cuboid, and the inserting plates are inserted into the slots without gaps; the perforated plate is fixedly bonded with the inserting plate, the boss is fixedly bonded with the bottom plate, and the bottom plate is fixedly connected to the wall body through bolts.

Further, the through holes on the perforated plate may have equal or unequal hole diameters.

Furthermore, the plug board is movable and can be inserted into and pulled out of the slot.

Furthermore, the perforated plate, the inserting plate, the lug boss and the bottom plate are made of materials with higher elastic modulus, such as wood or hard PVC.

Compared with the prior art, the utility model has the advantages of: the utility model discloses a sound absorption panel utilizes perforated plate, picture peg, boss and bottom plate combination to form a plurality of helmholtz resonator unit to through inserting the slip of the picture peg of locating in the boss, change the volume of resonator cavity, according to the reverberation time requirement in the hall room, adjust the sound absorption frequency in a flexible way, reach satisfied acoustic effect, and overall structure is simple, convenient operation.

Drawings

Fig. 1 is a schematic perspective view of the sound-absorbing panel of the present invention;

fig. 2 is an exploded view of the sound absorbing panel of the present invention;

fig. 3 is a cross-sectional view of the sound-absorbing panel of the present invention;

fig. 4 is a schematic view of the sound absorbing panel according to the present invention for adjusting the sound absorbing frequency.

The reference numerals in the figures denote: 1. a perforated plate; 2. inserting plates; 3. a boss; 4. a base plate.

Detailed Description

The invention is described in further detail below with reference to the drawings and specific examples.

As shown in figures 1-2, the utility model discloses a sound panel is inhaled to adjustable frequency, including perforated plate 1, picture peg 2, boss 3 and bottom plate 4. The perforated plate 1 is uniformly provided with vertical through holes 11, the inserting plate 2 is formed by splicing a plurality of thin plates 21 in a longitudinal and transverse mode and forms a rectangular cavity 22 with the same volume, the through holes 11 in the perforated plate 1 are communicated with the cavity 22, and the perforated plate 1 is fixedly connected with the inserting plate 2; the boss 3 consists of a series of cuboids 31 with the same volume, the cuboids 31 are uniformly distributed on the bottom plate 4, and the boss 3 is fixedly connected with the bottom plate 4; the distance between the cuboids 31 is equal, a slot 32 is formed in the gap, and the width of the slot 32 is equal to the thickness of the inserting plate 2; the volume of the cavity 22 enclosed by the inserting plate 2 is the same as that of the cuboid 31, and the inserting plate 2 is inserted into the inserting groove 32 on the boss 3 without gaps. When in use, the bottom plate 4 is fixedly connected to a wall body through bolts.

As shown in fig. 3, when the insert plate 2 is inserted along the insertion groove 32, a cavity 22 is formed between the insert plate 2 and the boss 3, so as to form a plurality of independent helmholtz resonator units; the inserting plate 2 slides in the slot 32 to change the volume of the cavity 22, so that the sound absorption frequency of the Helmholtz resonator is changed.

In order to improve the rigidity of the sound-absorbing plate and reduce the sound-solid coupling between the structure and sound waves, the perforated plate 1, the inserting plate 2, the boss 3 and the bottom plate 4 are made of wood or hard PVC and other materials with larger elastic modulus.

Example (b): as shown in fig. 4(a), when the insert plate 2 is inserted along the slot 32, the volume of the cavity 22 of the helmholtz resonator unit is the largest, so that low-frequency sound absorption can be achieved; according to the frequency of the required sound absorption, the inserting plate 2 slides to the corresponding position, as shown in fig. 4 (b); as shown in fig. 4(c), the insert plate 2 is inserted into the bottom along the insertion groove 32, the volume of the cavity 22 of the helmholtz resonator unit is zero, the sound absorbing panel is in a fully reflective operating state, and the sound absorption coefficient is substantially zero.

The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.

Claims

1. The utility model provides a sound panel is inhaled to adjustable frequency which characterized in that: the punching plate comprises a punching plate (1), an inserting plate (2), a boss (3) and a bottom plate (4), wherein vertical through holes (11) are uniformly drilled in the punching plate (1), the inserting plate (2) is formed by vertically and horizontally splicing a plurality of thin plates (21) to enclose a cuboid cavity (22) with the same volume, and the through holes (11) are communicated with the cavity (22); the lug boss (3) consists of a series of cuboids (31) with the same volume, the cuboids are arranged on the bottom plate (4) at equal intervals, and slots (32) are formed in gaps among the cuboids; the volume of the cavity (22) is the same as that of the cuboid (31), and the inserting plate (2) is inserted into the inserting groove (32) without gaps; perforated plate (1) and picture peg (2) bond fixedly, boss (3) bond fixedly with bottom plate (4), bottom plate (4) pass through bolt fixed connection on the wall body.

2. The frequency-tunable sound-absorbing panel of claim 1, wherein: the plug board (2) is movable and can be inserted and pulled out along the slot (32).

3. The frequency-tunable sound-absorbing panel of claim 1, wherein: the perforated plate (1), the inserting plate (2), the boss (3) and the bottom plate (4) are made of wood or hard PVC materials.