CN2444295Y

CN2444295Y - Combined sound absorption board

Info

Publication number: CN2444295Y
Application number: CN 00249313
Authority: CN
Inventors: 李博策
Original assignee: Shanghai Boxu Complex Decorative Material Co Ltd
Current assignee: Shanghai Boxu Complex Decorative Material Co Ltd
Priority date: 2000-09-20
Filing date: 2000-09-20
Publication date: 2001-08-22
Anticipated expiration: 2010-09-20

Abstract

The utility model discloses a combined sound absorption and insulation plate which is characterized in that a micro perforated plate is arranged between a front and a rear panels; the front panel forms a concave convex shape; the concave position of the front panel is provided with a front silencer; a sound absorption material layer is arranged between the micro perforated plate and the front panel with the convex position; a rear silencer is arranged on the micro perforated plate between the rear panel and the micro perforated plate. The utility model can have a good sound absorption and insulation effect, and can effectively absorb and kill direct sound, diffraction sound and reflected sound without sealing and isolating noise. Compared with an ordinary sound absorption screen, the utility model has lower design height, and is a whole frequency sound absorption and insulation plate which can effectively block different audio-frequency noise harmful to human health.

Description

A kind of combined type Felt

The utility model relates to the technical field of sound panel, specifically utilizes the physical characteristics of noise, design have suction, disappear, the sound insulationg board of sound insulation function.

Fast development along with industrial or agricultural, transportation; noise pollution has become a kind of public hazards; how to control the pollution of noise; for the acoustic enviroment of people's Creating Comfort is an important topic of modern society environment protection; and present sound panel can only work to the sound of upper frequency; the low-frequency sound of centering absorbs relatively poor to diffraction sound and reflected sound.

The technical solution of the utility model is achieved in that a kind of combined type Felt, it mainly comprises front and back panels, it is characterized in that: between front and back panels, be provided with microperforated panel, the front panel concave-convex surface, the concavity place of plate is provided with premuffler in front, between the front panel at convex place and microperforated panel, be provided with layers of absorbent material, on the microperforated panel between microperforated panel and the rear panel, be provided with rear muffler.

The utlity model has good sound absorption effect, and to through sound, diffraction sound and reflected sound all can absorb elimination effectively, do not need noise airtight isolated, the design height of general acoustic screen is low, also can use according to matching design such as the daylighting of environment, ventilation, views, be a kind of full range Felt that can effectively block the various audio-frequency noises of harmful human health.

Fig. 1 is a perspective view of the present utility model

Fig. 2 is the A-A cut-open view of Fig. 1

Fig. 3 is a front panel cut-open view of removing premuffler in the utility model

Fig. 4 is the vertical view of Fig. 3

Fig. 5 is the enlarged drawing of the premuffler among Fig. 2

Fig. 6 is the vertical view that turn 90 degrees that revolves of Fig. 5

Fig. 7 is the side view of Fig. 5

Fig. 8 is the upward view that turn 90 degrees that revolves of Fig. 5

Fig. 9 is the enlarged drawing of the rear muffler among Fig. 2

Figure 10 is the vertical view that turn 90 degrees that revolves of Fig. 9

Figure 11 is the side view of Fig. 9

The utility model will be further described below in conjunction with drawings and Examples.

The utility model mainly comprises front panel 1, rear panel 6, it is different from prior art and is: be provided with microperforated panel 4 between front and back panels, front panel 1 concave-convex surface, in the enforcement in front plate 1 be provided with approximate trumpet-shaped concave surface 12 of at least two rows and convex surface 13, be provided with the sound absorption hole 11 in different apertures at concave surface 12, convex surface 13 places, these holes that absorb sound; The concavity place of plate 1 is provided with premuffler 2 in front, premuffler 2 is approximately a microscler hollow cylinder, there is the sound absorption hole 21 in different apertures on the surface, front end face 22 forms circular face, two sides 25 inwardly form a circular arc concave shape, rear end face 23 is a plane, on the fixator 24 of protrusion is arranged, this fixator 24 can be for being incorporated on the front panel 1, between the front panel 1 at convex place and microperforated panel 4, be provided with porous layers of absorbent material 3, this porous layers of absorbent material 3 is approximately a microscler cylinder, and there are some micropores surface and inside, and these micropores connect mutually and communicate with the external world; On the microperforated panel between microperforated panel and the rear panel 4, be provided with rear muffler 5, the microperforated panel 4 of present embodiment is a thickness less than 1 millimeter thin plate, on microperforated panel 4, be provided with some apertures less than 1 millimeter sound absorption hole 41, rear muffler 5 is approximately a microscler hollow cylinder, there is the sound absorption hole 51 in different apertures on the surface, front end face 52 is a plane, be provided with the fixator 53 of protrusion above, this fixator 53 can make up with microperforated panel 4, two sides 55 and rear end face 54 inwardly become the arc convex surface shape, and rear panel 6 is the planar and microperforated panel 4 formation one sound absorption cavity 61 of a plate.

Suction of the present utility model every the noise principle is:

During use front panel 1 is set up towards the direction of noise source, utilize concave surface 12 and convex surface 13 on the front panel 1 to be combined into a large-area suction collection acoustic form with premuffler 2, noise enters premuffler 2 after this suction collection acoustic form is collected, produce compression and expand, the both sides arc surface 25 of premuffler 2 reflexes to sound absorption hole 21 with noise and absorbs, the noise that a part is passed sound absorption hole 21 is absorbed by sound-absorbing porous material 3, the sound absorption hole 11 that front panel 1 and premuffler 2 lip-deep variant aperture set are synthetic, 21, to go directly noise and diffraction noise absorbs, part does not have absorbed noise, arrive rear muffler 5 through premuffler 2 backs, absorbed by the arc surface blocking reflected of the two sides 55 of rear muffler 5 and rear end face 54 to the hole 51 that absorbs sound, and pass the noise that porous layers of absorbent material 3 is not absorbed elimination as yet, to pass microperforated panel 4 once more and enter sound absorption cavity 61, form the resonance sound-absorbing effect, so by the hole 11 that absorbs sound layer by layer, 21,3,41,51, repeatedly noise is compressed, expand, the motion of physical characteristicss such as resonance, with the repeatedly frequency conversion and produce the sound wave phase differential of various frequencies, constantly eliminate the energy of noise, and then reach the effect of good sound absorption.

Claims

1, a kind of combined type Felt, it mainly comprises front and back panels, it is characterized in that: between front and back panels, be provided with microperforated panel, the front panel concave-convex surface, the concavity place of plate is provided with premuffler in front, between the front panel at convex place and microperforated panel, be provided with layers of absorbent material, on the microperforated panel between microperforated panel and the rear panel, be provided with rear muffler.

2, by the described a kind of combined type Felt of claim 1, it is characterized in that: plate is provided with approximate trumpet-shaped concave surface of at least two rows and convex surface in front, is provided with the sound absorption hole (11) in different apertures at concave surface, convex surface place.

3, by claim 1 or 2 described a kind of combined type Felts, it is characterized in that: premuffler is approximately a microscler hollow cylinder, there is the sound absorption hole (21) in different apertures on the surface, front end face forms circular face, two sides inwardly form a circular arc concave shape, rear end face is a plane, on the fixator of protrusion is arranged.

4, by claim 1 or 2 described a kind of combined type Felts, it is characterized in that: the hole layers of absorbent material is approximately a microscler cylinder, and there are some micropores surface and inside, and these micropores connect mutually and communicate with the external world.

5, by claim 1 or 2 described a kind of combined type Felts, it is characterized in that: rear muffler is approximately a microscler hollow cylinder, and there is the sound absorption hole (51) in different apertures on the surface, and front end face is a plane, be provided with the fixator of protrusion above, two sides and rear end face inwardly become the arc convex surface shape.

6, by claim 1 or 2 described a kind of combined type Felts, it is characterized in that: rear panel is the planar and microperforated panel formation one sound absorption cavity of a plate.