CN210887638U - Efficient multiaspect sound absorption diffuser - Google Patents
Efficient multiaspect sound absorption diffuser Download PDFInfo
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- CN210887638U CN210887638U CN201920486406.3U CN201920486406U CN210887638U CN 210887638 U CN210887638 U CN 210887638U CN 201920486406 U CN201920486406 U CN 201920486406U CN 210887638 U CN210887638 U CN 210887638U
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Abstract
The utility model discloses an efficient multiaspect sound absorption diffuser, it includes that at least three sound absorption surface encloses into closed three-dimensional form object, three-dimensional form object has the sound-absorbing chamber. The multi-surface sound absorption diffuser is high in sound absorption efficiency, large in sound absorption frequency range, light and handy in structure and suitable for different installation occasions.
Description
Technical Field
The invention relates to the field of sound absorption materials, in particular to a high-efficiency multi-surface sound absorption diffuser.
Background
In a hall of the viewing type and a room where sound is recorded and played back, design of indoor sound quality is indispensable, and various acoustic processing materials and constructions are incorporated in interior decoration. The sound absorption of the indoor wall surface and the ceiling can eliminate harmful strong reflected sound, avoid sound focusing, reduce indoor reverberation time, reduce reverberation sound level and improve speech definition.
However, in the existing sound absorber, only the front face of the material facing the space generally absorbs sound, the side face is generally used for installation and fixation and cannot play a sound absorption role, and the design of the sound absorption filler is unreasonable, so that a plurality of defects are caused. The sound absorption rate of the existing sound absorber for 125Hz sound is about 0.2 to 0.4, the sound absorption rate for 250Hz sound is about 0.5 to 0.8, the sound absorption rate for 500Hz sound is about 0.9, and the sound absorption rate for 1000Hz sound is about 0.9. It can be seen that the existing sound absorber has poor sound absorption effect, and is particularly poor for low-frequency sound below 250 Hz.
On the other hand, the sound absorber has poor structural adaptability, the most suitable installation scheme is difficult to adjust and install according to actual conditions, and the installation position and the shape are difficult to adjust. And because general sound absorber mainly comprises compact sound absorption cotton, bulky, weight is heavier, when higher positions such as ceiling need be installed to, needs comparatively firm mounting structure, has increased the installation degree of difficulty and cost.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides an efficient multi-surface sound absorption diffuser which is high in sound absorption efficiency, large in sound absorption frequency range, light and handy in structure and suitable for different occasions.
In order to achieve the purpose, the technical scheme of the invention is as follows:
an efficient polyhedral acoustic diffuser: the three-dimensional sound absorption structure comprises a closed three-dimensional object surrounded by at least three sound absorption surfaces, wherein the three-dimensional object is provided with a sound absorption cavity. The thickness of a common sound absorption product in the industry is generally 2.5-10 cm, the thickness is thinner, the area of the front surface and the back surface is larger, and the influence of the sound absorption of the side surface of the product on the whole sound absorption effect is neglected. In the scheme, a different idea from the sound absorption scheme in the prior art is adopted, and each surface of the multi-surface sound absorption diffuser, including the side surface, is set as a sound absorption surface, so that the sound reaching each surface can be absorbed; the sound-absorbing cotton filled type sound absorber has the advantages that the structure with the sound-absorbing cavity is combined, sound enters the multi-surface sound-absorbing diffuser in a three-dimensional shape, and then is reflected and absorbed through a plurality of surfaces, so that the effect which cannot be achieved by the traditional sound-absorbing cotton filled type sound absorber is achieved. And considering that the sound absorber is generally made into a non-cube structure, such as a flat or long strip structure, the path and the absorption mode of the sound entering the polyhedral sound absorption diffuser from each surface are different, so the sound absorption effect is different, even if the product is not filled with sound absorption cotton, the sound absorption efficiency and the sound absorption frequency band of the full-frequency-band sound can be obviously improved by utilizing the special structure formed by each sound absorption surface and the sound absorption cavity, and particularly, the sound absorption effect of the low-frequency sound with the frequency less than 250Hz is obviously improved.
Further, the three-dimensional object consists of six sound absorption surfaces, and comprises a front surface, a back surface and a side surface connecting the front surface and the back surface. The six sound absorption surfaces can form a regular flat plate structure, and the installation is convenient.
And furthermore, the side surfaces are spliced surfaces, and the side surfaces of every two three-dimensional objects are spliced in a matching way. Can install the polylith as required through the concatenation, every product can be made less, makes things convenient for the production transportation.
Still further, the front surface is an arc surface, a conical surface or a boat-shaped surface, the front surface is an arc surface, two side surfaces intersecting with the arc edge of the front surface are first side surfaces, and two surfaces intersecting with the straight edge of the front surface are second side surfaces which are symmetrical to each other. The symmetrical second side surfaces ensure that the two second side surfaces have the same size and angle, and can be well aligned when two multi-surface sound absorption diffusers need to be spliced so as to be convenient for connection and installation.
Still further, the front surface is enclosed by two opposite straight edges and two opposite circular arc edges; the intersection edge of the second side surface and the first side surface is a side edge, and the side edge is located on a radius line of a circle where the arc edge is located. When the two multi-surface sound absorption diffusers are spliced, the two second side surfaces can be just aligned, so that the front surfaces can be tightly spliced to form a large cylindrical side surface. The shape can be suitable for various scenes, for example, when the LED lamp is used on a wall or a ceiling, the LED lamp can be spliced by adopting the front side with the large-radius arc edge, so that the total radian after splicing is reduced, and the LED lamp can be more attached to the wall or the ceiling; when the sound absorber is used in a small area, the front sides with the small-radius arc edges can be spliced to form a small sound absorber combination, the sound absorber combination can be directly placed on the open space of a room, and the sound absorption effect can be achieved.
Preferably, the sound absorption cavity is filled with sound absorption cotton, and the sound absorption cotton is formed by overlapping cotton layers with different densities. The sound absorption effect is enhanced by filling the sound absorption cotton, the densities of the sound absorption cotton fiber micropores with different densities are different, the surface areas of the fiber micropores are different, and the sound absorption effect is different from the aimed sound frequency, so that the structure formed by stacking the sound absorption cotton fiber micropores has a better sound absorption effect and a wider sound absorption range.
Further, cotton layer includes the cotton layer of first cotton layer and second, the density on first cotton layer is greater than the density on the cotton layer of second, the sound absorption cotton includes the cotton layer of first cotton layer, second and first cotton layer in proper order. The cotton layers with one large density and one small density are arranged in a staggered mode, the sound absorption effect is good, the manufacturing difficulty is low, and the cost performance is high.
Still further, the side is provided with the installation ear, and the installation ears on the opposite sides can be mutually connected in a matching way. The assembling lug is used for assisting operations such as installation splicing and the like.
Preferably, the mounting ears project outwardly in the direction of the side faces. When splicing two high-efficiency multi-surface sound absorption diffusers, the assembling lugs extend outwards along the side surfaces and cannot interfere with each other.
Preferably, the mounting ears are L-shaped or I-shaped. Easy to manufacture and can be quickly aligned during installation.
Preferably, the sound absorption surface is made of a slit sound absorption plate, sound absorption cloth or a metal perforated plate with the perforation rate of 10-20%. The two kinds of sound absorption cotton have light volume and simple shape, and are suitable for being made into a large-area sound absorption surface; and the metal perforated plate material with the perforation rate of 10-20% can also achieve good sound absorption effect, and the material plasticity is strong, and is easy to manufacture and process.
The efficient multi-surface sound absorption diffuser is a three-dimensional object surrounded by at least three sound absorption cottons, absorbs sound in all directions, and combines various sound absorption ways with paths; the sound absorption surface layers with various densities are arranged in a layered mode, so that the sound absorption efficiency of each frequency band, particularly low-frequency sound, is high; can be spliced infinitely and is suitable for being installed and used in different occasions.
Drawings
FIG. 1 is a perspective view of a high efficiency, multi-faceted sound absorbing diffuser of the present invention at angle one;
FIG. 2 is a perspective view of a second, highly effective, multi-faceted sound absorbing diffuser according to the present invention;
FIG. 3 is a perspective view of a high efficiency multi-faceted sound absorbing diffuser of the present invention after two pieces have been spliced;
FIG. 4 is a schematic cross-sectional view of a highly effective sound-absorbing cotton in example 1 of the present invention;
fig. 5 is a line graph of experimental data measured in example 2 of the present invention.
Detailed Description
The invention discloses a high-efficiency polyhedral sound absorption diffuser in combination with the accompanying drawings, wherein:
example 1:
an efficient polyhedral acoustic diffuser: the three-dimensional sound absorption structure comprises a closed three-dimensional object surrounded by at least three sound absorption surfaces, wherein the three-dimensional object is provided with a sound absorption cavity. The three-dimensional object enclosed by the three sound absorption surfaces can be cylindrical, the three-dimensional object enclosed by the four sound absorption surfaces can be semi-cylindrical, and the three-dimensional object enclosed by the five sound absorption surfaces can be triangular prism-shaped.
As a preferred aspect of the present invention, the three-dimensional object comprises six sound-absorbing surfaces, including a front surface, a back surface and a side surface connecting the front surface and the back surface. The side surfaces are spliced surfaces, and the side surfaces of every two three-dimensional objects are matched and spliced with each other. The front face is an arc-shaped face, two side faces intersected with the arc edge of the front face are first side faces, and two faces intersected with the straight edge of the front face are symmetrical second side faces. The front surface is enclosed by two opposite straight edges and two opposite circular arc edges; the intersection edge of the second side surface and the first side surface is a side edge, and the side edge is located on a radius line of a circle where the arc edge is located.
The sound absorption cavity is filled with sound absorption cotton, and the sound absorption cotton is formed by overlapping cotton layers with different densities. The cotton layer includes the cotton layer of first cotton layer and second, the density on first cotton layer is greater than the density on the cotton layer of second, the sound absorption cotton includes the cotton layer of first cotton layer, second and first cotton layer in proper order.
The side is provided with mounting lugs, and the mounting lugs on the opposite side can be connected in a matched manner. The mounting lug extends outwards along the direction of the side face, and the mounting lug is L-shaped or straight. The assembling lugs are used for assisting operations such as installation splicing and the like, are convenient to manufacture and can be quickly aligned during installation. When splicing two high-efficiency multi-surface sound absorption diffusers, the assembling lugs extend outwards along the side surfaces and cannot interfere with each other.
The sound absorption surface is made of a strip seam sound absorption plate or sound absorption cloth. The two kinds of sound absorption cotton have light volume and simple shape, and are suitable for being made into a large-area sound absorption surface.
In the scheme, a different idea from the sound absorption scheme in the prior art is adopted, and each surface of the multi-surface sound absorption diffuser is set as a sound absorption surface, so that the sound reaching each surface can be absorbed; the sound-absorbing cotton filled type sound absorber has the advantages that the structure with the sound-absorbing cavity is combined, sound enters the multi-surface sound-absorbing diffuser in a three-dimensional shape, and then is reflected and absorbed through a plurality of surfaces, so that the effect which cannot be achieved by the traditional sound-absorbing cotton filled type sound absorber is achieved. Furthermore, considering that the sound absorber is generally made into a non-cubic structure, such as a flat or long strip structure, the path and the mode of absorption of sound entering the polyhedral sound absorbing diffuser from each side are different, and the sound absorption effect is different, so that the sound absorption efficiency of the product is improved, the sound absorption frequency range is expanded, and particularly the sound absorption effect for low-frequency sound with the frequency less than 250Hz is obviously improved.
The sound absorption surfaces of the six surfaces can form a regular flat plate-shaped structure, so that the installation is convenient; can install the polylith as required through the concatenation, every product can be made less, makes things convenient for the production transportation. The symmetrical second side surfaces ensure that the two second side surfaces have the same size and angle, and can be well aligned when two multi-surface sound absorption diffusers need to be spliced so as to be convenient for connection and installation. When two multi-surface sound absorption diffusers are spliced, the two second side surfaces can be just aligned, so that the front surfaces can be tightly spliced to form a large cylindrical side surface. The shape can be suitable for various scenes, for example, when the LED lamp is used on a wall or a ceiling, the LED lamp can be spliced by adopting the front side with the large-radius arc edge, so that the total radian after splicing is reduced, and the LED lamp can be more attached to the wall or the ceiling; when the sound absorber is used in a small area, the front sides with the small-radius arc edges can be spliced to form a small sound absorber combination, the sound absorber combination can be directly placed on the open space of a room, and the sound absorption effect can be achieved.
The sound absorption effect is enhanced by filling the sound absorption cotton, the densities of the sound absorption cotton fiber micropores with different densities are different, the surface areas of the fiber micropores are different, and the sound absorption effect is different from the aimed sound frequency, so that the structure formed by stacking the sound absorption cotton fiber micropores has a better sound absorption effect and a wider sound absorption range. The cotton layers with one large density and one small density are arranged in a staggered mode, the sound absorption effect is good, the manufacturing difficulty is low, and the cost performance is high.
Example 2:
an efficient polyhedral acoustic diffuser characterized by: the sound absorption cotton is of a hexahedral hollow structure, the sound absorption cotton is filled in the sound absorption cotton, the sound absorption cotton comprises a front surface 1, side surfaces and a back surface 2, all the surfaces are sound absorption surfaces, the front surface 1 is a part of a cylindrical side surface, two side surfaces intersected with an arc edge 6 of the front surface 1 are first side surfaces 3, and two surfaces intersected with a straight edge of the front surface 1 are second side surfaces 4 which are symmetrical to each other.
The intersection edge of the second side surface 4 and the first side surface 3 is a side edge 5, the side edge 5 is located on a radius line of an arc edge 6 at the intersection point of the front surface 1 and the side edge 5, the radius of the arc edge 6 is 6 meters, the length of the side edge 5 is 150mm, the maximum thickness of the first side surface 3 is 278.4mm, and the maximum distance between the second side surfaces 4 is 2500 mm.
The side with the back 2 intersects the limit and is the base 7, with the base 7 that first side 3 corresponds is first base 7, with the base 7 that second side 4 corresponds is second base 7, be equipped with a style of calligraphy or L type assembly ear 8 of metal on the base 7, assembly ear 8 is followed the direction of side is stretched out outwards, and assembly ear 8 on every two relative bases 7 can mutually support the connection. Each bottom edge 7 is provided with 2 assembling lugs 8, the assembling lugs 8 on the first bottom edge 7 are positioned close to the corners, the first bottom edge 7 is 1000mm long, and the second bottom edge 7 is 2437.5mm long.
As another expansion of this embodiment, the front surface 1 may also be a conical surface or a boat-shaped surface, so that after the sound absorbers are spliced with each other, the front surfaces 1 of different sound absorbers may be connected in a smooth transition manner.
In the aspect of materials: the front face 1 adopts a strip width-seam width aluminum strip seam panel with the width of 20mm-5 mm; the back face 2 is 48kg/m3× 50mm red glass wool board (outer package 80 g/m)2The sound absorption cotton is made of European red cotton (a layer of 32k × 100mm cotton felt and a layer of 48k × 50mm cotton board, the middle gap is transversely filled with 4 cotton battens with the width of 80 mm), the sound absorption cotton is arranged in the layer from the front 1 to the back 2, the sound absorption cotton further comprises a frame for mounting a sound absorption surface, and the frame is made of 25 angle steel.
The results of measuring the sound absorption coefficients of the sound absorber in this embodiment for sounds in different frequency bands in unit projection area are shown in the following table, and the line graph is shown in fig. 5:
scene one: 1 meter from the ground, and the distance between the sound absorbers is 30 cm;
in a second scene, the 2 × 2 arrays are not arranged in a connected mode and are 5 cm away from the ground, and the distance between the sound absorbers is 30 cm;
in a third scene, 2 × 2 arrays are tightly attached to a hard surface, and the distance between sound absorbers is 30 cm;
scene four: 4 connected closely and tightly attached to the hard surface.
From the data, compared with the common sound absorber, the polyhedral sound absorption diffuser has good effect on absorbing 125 to 4000Hz full-band sound and good performance, and is suitable for being used in various occasions needing sound absorption. Especially for low-frequency sound less than 125Hz, the sound absorption coefficient is between 1 and 1.5, and compared with the sound absorption coefficient of 0.2 to 0.4 of the existing sound absorber, the sound absorption effect is enhanced by several times, and the sound absorption effect is greatly improved.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (8)
1. An efficient polyhedral acoustic diffuser characterized by: the closed three-dimensional object comprises a hexahedral hollow structure enclosed by six sound absorption surfaces, and comprises a front surface, a back surface and a side surface connecting the front surface and the back surface, wherein the front surface and the back surface are made of sound absorption cloth and a metal perforated plate material or a slit sound absorption plate with a perforation rate of 10-20%, and the side surface is made of a metal perforated plate material or sound absorption cloth with a perforation rate of 10-20%; the three-dimensional object is provided with a sound absorption cavity, and sound is reflected and absorbed by a plurality of surfaces after entering the three-dimensional multi-surface sound absorption diffuser; the sound absorption cavity is filled with sound absorption cotton, and the sound absorption cotton is formed by overlapping cotton layers with different densities.
2. The high efficiency, multi-sided sound absorptive diffuser of claim 1, wherein: the front surface is an arc surface, a conical surface or a boat-shaped surface, the side surfaces are spliced surfaces, and the side surfaces of every two three-dimensional objects are spliced in a matched mode.
3. The high efficiency, multi-sided sound absorptive diffuser of claim 2, wherein: the front face is an arc-shaped face, two side faces intersected with the arc edge of the front face are first side faces, and two faces intersected with the straight edge of the front face are symmetrical second side faces.
4. The high efficiency, multi-sided sound absorptive diffuser of claim 3, wherein: the front surface is enclosed by two opposite straight edges and two opposite arc edges; the intersection edge of the second side surface and the first side surface is a side edge, and the side edge is located on a radius line of a circle where the arc edge is located.
5. The high efficiency, multi-sided sound absorptive diffuser of claim 1, wherein: the cotton layer includes the cotton layer of first cotton layer and second, the density on first cotton layer is greater than the density on the cotton layer of second, the sound absorption cotton includes the cotton layer of first cotton layer, second and first cotton layer in proper order.
6. The high efficiency, multi-sided sound absorptive diffuser of claim 2, wherein: the side is provided with mounting lugs, and the mounting lugs on the opposite side can be connected in a matched manner.
7. The high efficiency, multi-sided sound absorptive diffuser of claim 6, wherein: the mounting lug extends outwards along the direction of the side face, and the mounting lug is L-shaped or straight.
8. The high efficiency, multi-sided sound absorptive diffuser of claim 1, wherein: the multi-surface sound absorption diffuser is made of A-grade non-combustible or B1-grade non-combustible materials in the whole fireproof performance.
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| CN201920486406.3U CN210887638U (en) | 2019-04-11 | 2019-04-11 | Efficient multiaspect sound absorption diffuser |
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