CN2694426Y

CN2694426Y - Acoustic board

Info

Publication number: CN2694426Y
Application number: CN 03237734
Authority: CN
Inventors: 梁永仁
Original assignee: Building Acoustics (international) Ltd
Current assignee: Building Acoustics (international) Ltd
Priority date: 2003-09-25
Filing date: 2003-09-25
Publication date: 2005-04-20
Anticipated expiration: 2013-09-25

Abstract

The utility model relates to an acoustic board which is equipped with at least five layers of laminated board components. A first panel component is a poromeric surface layer; a second board component is an air damping layer; a third intermediate board component is an intermediate transition flow layer; a fourth board component is the poromeric surface layer; a fifth bottom board component is the air damping layer; every board component is all equipped with a through hole or space in which the air can flow over. The acoustic board is characterized in that the area of the through hole or the space of the third intermediate board component is biggest; the second board component clamped between the first panel component and the third intermediate board component forms the through hole whose bottleneck becomes narrow compared with the through hole of the first panel component and the third intermediate board component; therefore, the flow resistance ratio (R/pc) of the acoustic board is 0.91+/ (-) 2%. The form and the size of the fluid channel of the acoustic board with different laminated structures are used for adjusting reregistration and transmitting methods of the fluid wave in mediums, in particular to acoustic transmission; acoustic pressure wave passes through the channel which contracts once again after contracting and enlarging to make the acoustic wave damp.

Description

Abatvoix

Technical field

The utility model relates to a kind of abatvoix, and it is used in the place that various unwanted sound must suppress, as background noise.Abatvoix of the present utility model can be used writer's dividing plate or sept.

Background technology

Existing panel mainly is to utilize the perforation surface layer to add that airtight and fibrous glass sound absorbing layer cause sound-absorbing effect to reach.

For example US5888610 discloses a kind of interlayer abatvoix, have at middle honeycomb laminate, and the sealing bottom that has multilayer in the one side of honeycomb laminate, at the ventilative surface layer with a plurality of through holes that the another side of honeycomb laminate has multilayer, through hole is regularly arranged identical big small circular.

Propagate at " breathable propagation medium " when sound waves, because the windage in panel medium, portion of energy is reflected and/or is absorbed.The characteristic of ripple is subjected to acoustic impedance and flow pattern is arranged, and acoustic impedance is fluid density, viscosity and function of speed, and flow pattern depends primarily on the size and the structure of honeycomb pattern/hollow section.

The utility model content

The purpose of this utility model provides a kind of panel of sound-absorbing.

The utility model relates to a kind of improvement technology that the ripple propagation is rearranged, spreads again, turns to and propagate again in the abatvoix that can form unlimited combination in a fluid environment.

The utility model proposes a kind of abatvoix, have at least five layer laminate board members, wherein first board member is ventilative surface layer, and second board member is the air damping layer, and the 3rd intermediate plate member is middle intergradation fluid layer, the 4th board member is ventilative bottom, the 5th board member is the air damping layer, and each board member all has through hole or the space that air can flow through, and it is characterized in that, at least the one deck that is clipped in two-layer forms the through hole that bottleneck narrows down, thereby flow resistance is 0.91+/-2% than (R/pc).

Like this, the first ventilative surface layer that sonic impinging has first through-hole pattern, entering second board member (being subjected to the flow resistance barrier film) with second turbulent flow through-hole pattern little than first through hole does to limit mobile, described then sound wave is by the honeycomb pattern of intermediate plate member/hollow section adjustment and diffusion, this makes described flowing constitute the laminar flow pattern and enter the 4th ventilative bottom board member then, and the sound wave that enters the 5th base plate member (flow resistance barrier film) so again leaves with the turbulent flow pattern then.

Effect of the present utility model or effect are: rely on the transmission of mode, especially a sound wave that comes the regulated fluid ripple to aim at and transmit in medium with shape, size in the fluid passage of the abatvoix of different sandwich constructiones.Enlarge the passage that narrows again after the sound pressure ripple passes and narrows and sound wave is weakened effectively, reach the inhibition noise.

Description of drawings

Fig. 1 is the exploded view of the abatvoix of first embodiment of the present utility model;

Fig. 2 is the skeleton view of band partly cut-away of the abatvoix of Fig. 1;

Fig. 3 is the exploded view of the abatvoix of second embodiment of the present utility model;

Fig. 4 is the skeleton view of band partly cut-away of the abatvoix of Fig. 3;

Fig. 5 is the view that the panel member in Fig. 1 or 3 is replaced plate;

Fig. 6 is the view that the intermediate plate member in Fig. 1 or 3 is replaced plate.

Embodiment

The transmission of mode, especially sound wave that shape, the size in the utility model dependence hole comes the regulated fluid ripple to aim at and transmit in medium.The sound pressure ripple passes and narrows the back and enlarge the passage narrow again and sound wave is weakened, and particularly passage is that multilayer board member by different graphic constitutes.

Particularly, abatvoix shown in Fig. 1-2, have five layer laminate board member 1-5 (also can more than five layers), wherein first board member 1 is the ventilative surface layer that is made of a plurality of round tube holes and a plurality of long groove, second board member 2 is for having the air damping layer of less through-hole diameter, thereby make the compression of air or sound wave, the turbulent flow of Xing Chenging causes the variation on the acoustics like this.The 3rd intermediate plate member 3 is the cellular middle intergradation fluid layer with space, thereby turbulent flow is modified to Channel Group.The 4th board member 4 is for to have the ventilative bottom that narrows the space, and its shape also can be for the same or similar with second board member 2.The 5th board member 5 is the air damping layer, also has the through hole that further narrows with respect to the 4th board member 4.Wherein separately two-layer all forms the through hole that bottleneck narrows down with respect to adjacent layer or exposed space, thereby flow resistance is 0.91+/-2% than (R/pc).Be in the present embodiment, second board member 2 and the 5th board member 5 all form the through hole that bottleneck narrows down with respect to adjacent layer or exposed space, and the 3rd intermediate plate member 3 channel space maximums.

The turbulent flow pattern is adjusted in the passage of the tool changes shape of abatvoix and size, and compared with using traditional structure, acoustic impedance works with very high efficient in abatvoix.The structure of this innovation obtains best efficiency in the multilayer composition.

Wherein, in the utility model, the breathable that first board member 1 and the 4th board member 4 all can be transferred mutually.Equally, the air damping layer that all can transfer mutually of second board member 2 and the 5th board member 5.

With reference to figure 3-4, similar as first embodiment, its difference is the passage of the first board member 1A for being made of elongated slot, and the elongated slot of the 4th board member 4A is to become horizontal with the elongated slot of the first board member 1A.In addition, the 3rd intermediate plate member 3A constitutes for the C shape bar by two groups of back-to-back band radians.Like this, as first embodiment, the second board member 2A and the 5th board member 5A all form the through hole that bottleneck narrows down with respect to adjacent layer or exposed space, and the 3rd intermediate plate member 3A channel space maximum.

Fig. 5 is the replacement example of the first or the 4th board member, and wherein the first board member 1B can be and has a pair of opposed arc elongated slot and circular hole formation.The first board member 1C constitutes for the passage that is formed by three groups of parallel elongated slots.The first board member 1D constitutes for the passage that is formed by row's parallel long groove.

Fig. 6 is the replacement example of intermediate plate member, and wherein intermediate plate member 3B and 3C are indentation or W shape, and intermediate plate member 3D is a C shape, and intermediate plate member 3E and 3F are for passing through the rectangular channel of bar formation anyhow, and intermediate plate member 3G is an X-shaped, and intermediate plate member 3H is an O shape.

In addition, the through hole in each board member itself can be the taper (not shown), and promptly an end is bigger than the other end, has the feature that narrows down or enlarge, thereby further dissipates sound wave.

Claims

1. abatvoix, have at least five layer laminate board members, its first panel member is ventilative surface layer, second board member is the air damping layer, the 3rd intermediate plate member is an intergradation fluid layer in the formula, the 4th board member is ventilative surface layer, the 5th base plate member is the air damping layer, each board member all has through hole or the space that air can flow through, it is characterized in that, the through hole of the 3rd intermediate plate member or spatial area are maximum, and are clipped in first, second board member between the 3rd intermediate plate member forms and compares first, the 3rd intermediate plate member is the through hole that bottleneck narrows down, thereby the flow resistance of sound panel is 0.91+/-2% than (R/pc).

2. abatvoix as claimed in claim 1 is characterized in that, at least one in first panel member and the 4th board member is the ventilative surface layer that has the arc elongated slot.

3. abatvoix as claimed in claim 1 is characterized in that, at least one in first panel member and the 4th board member is the ventilative surface layer of elongate slots through hole.

4. abatvoix as claimed in claim 1 is characterized in that, the mesosphere board member is combined by one of following structure: honeycomb, indentation, W shape, C shape, O shape, X-shaped, rectangle.

5. abatvoix as claimed in claim 1 is characterized in that, the through hole in each board member is originally as taper.