CN102312489A - Light broad band sound-absorption board - Google Patents
Light broad band sound-absorption board Download PDFInfo
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- CN102312489A CN102312489A CN201110201653A CN201110201653A CN102312489A CN 102312489 A CN102312489 A CN 102312489A CN 201110201653 A CN201110201653 A CN 201110201653A CN 201110201653 A CN201110201653 A CN 201110201653A CN 102312489 A CN102312489 A CN 102312489A
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Abstract
The invention relates to a sound-absorption board, in particular to a light broad band sound-absorption board, which solves the problems that in the existing honeycomb-shaped sandwich wooden sound-absorption board, the sound-absorption frequency band is narrow, and the sound-absorption effect under low frequency and high frequency is poorer. A first sandwich layer, a thin paper layer and a second sandwich layer are arranged in a hollow cuboid structure, wherein the first sandwich layer is clamped between a panel and the thin paper layer, the panel, the first sandwich layer and the thin paper layer are connected together, the second sandwich layer is clamped between the thin paper layer and a back board, the thin paper layer, the second sandwich layer and the back board are connected together, the first sandwich layer and the second sandwich layer are respectively a honeycomb-shaped sandwich layer, the honeycomb-shaped sandwich layer is formed by splicing a plurality of barrel bodies with hexagonal sections, the inner cavity of each barrel body with the hexagonal section is a honeycomb-shaped cavity, the volume fraction of the honeycomb-shaped cavities of the first sandwich layer and the second sandwich layer is 0.8-0.9, though holes corresponding to the barrel bodies with the hexagonal sections are formed in the panel, the though holes are respectively communicated with the barrel bodies with the hexagonal sections, and the sectional area of each through hole is less than a half of the sectional area of the corresponding barrel body. The sound-absorption board disclosed by the invention is used for sound absorption and noise reduction.
Description
Technical field
The present invention relates to a kind of acoustical board.
Background technology
Sound absorption is one of major measure of noise control.At present, the ornament materials that is used for indoor sound absorption generally adopts inorfil porous absorption materials such as mineral wool, glass wool, and they are crisp because of fibroid in the process of installation, fractureing easily forms that dust dissipation contaminated environment, influence are breathed, scratchy skin.Also have the metal piercing acoustical board in addition,, but be prone to give ice-cold sensation, be not suitable for the room in little space, and cost compares higher like punched steel plate, Pierced Aluminum Plank etc.
Wooden acoustical board is a kind of emerging sound absorption material, mainly contains groove wood, hole wood acoustical board and wood wool acoustical board on the current market.It is in the majority wherein to open the groove wood acoustical board that adds one deck sound-absorbing mat behind straight flute, back side perforation, the backboard again with medium density fibreboard or light particleboard as the front of base material.Also has a kind of many Helmholtz resonators parallel connection type cellular sandwich acoustical board in addition; The applying date is that " the wooden acoustical board of many Helmholtz resonators parallel connection type cellular sandwich " that September 26, publication number in 2010 are CN101962980A discloses a kind of wooden acoustical board that has certain sound absorption at medium and low frequency, but the sound sucting band of the wooden acoustical board of this kind is narrow, acoustically effective is relatively poor under low frequency and high-frequency.
Summary of the invention
The purpose of this invention is to provide a kind of broadband lightweight acoustical panels, with solve existing cellular sandwich acoustical board sound sucting band narrow, under low frequency and high-frequency the relatively poor problem of acoustically effective.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: said acoustical board comprises panel, backboard and four support structure plates; Four support structure plates are located between panel and the backboard; Panel, backboard and four support structure plates surround a hollow rectangular structure; Said acoustical board also comprises first sandwich layer, papery thin layer and second sandwich layer, and first sandwich layer, papery thin layer and second sandwich layer are located in the hollow rectangular structure, and first sandwich layer is clipped between panel and the papery thin layer and the three links together; Second sandwich layer is clipped between papery thin layer and the backboard and the three links together; First sandwich layer and second sandwich layer are cellular sandwich layer, and cellular sandwich layer is that hexagonal cylindrical shell is stitched together and constitutes by a plurality of cross sections, and each cross section is that the inner chamber of hexagonal cylindrical shell is a honeycomb chamber; The honeycomb cavity volume rate of first sandwich layer and second sandwich layer is between 0.8-0.9; Having a plurality of and cross section on the panel is the corresponding through hole of hexagonal cylindrical shell, and each through hole is that hexagonal cylindrical shell is communicated with cross section, and the cross-sectional area of each through hole is less than 1/2nd of the cross-sectional area of cylindrical shell corresponding with it.
The present invention has following beneficial effect: the panel of the present invention and first sandwich layer constitute many Helmholtz resonators array structure, have the sound absorption of certain bandwidth at medium and low frequency; Papery laminate structure between first sandwich layer and second sandwich layer can produce the effect that vibration deformation reaches loss acoustic energy under acoustic wave excitation, can produce the ripple effect of inhaling at lower frequency region; Second sandwich layer has the composite effect of many cells air chamber array structure concurrently, and the centering high frequency sound wave can play assimilation effect.Therefore, the sandwich acoustical board of first sandwich layer and second core structure has embodied the target at full range band performance acoustically effective.
Description of drawings
Fig. 1 is a stereogram of the present invention; Fig. 2 is a vertical view of the present invention; Fig. 3 is the left view of Fig. 2;
Fig. 4 is that the present invention is 20mm at the height of the cylindrical shell 7 of first sandwich layer 2, and the height of the cylindrical shell 7 of second sandwich layer 4 is 20mm, and the thickness of medium density fiber panel 1 is 3.5mm; The aperture of through hole 1-1 is 2mm; Perforated percentage is that frequency is the sound absorption spectrogram between 125～4000Hz under 6% the situation
Fig. 5 is that the present invention is 20mm at the height of the cylindrical shell 7 of first sandwich layer 2; The height of the cylindrical shell 7 of second sandwich layer 4 is 20mm, and the thickness of medium density fiber panel 1 is 3.5mm, and the aperture of through hole 1-1 is 4mm; Perforated percentage is that frequency is the sound absorption spectrogram between 125～4000Hz under 3% the situation;
Fig. 6 is that the present invention is 10mm at the height of the cylindrical shell 7 of first sandwich layer 2; The height of the cylindrical shell 7 of second sandwich layer 4 is 20mm, and the thickness of medium density fiber panel 1 is 3.5mm, and the aperture of through hole 1-1 is 4mm; Perforated percentage is that frequency is the sound absorption spectrogram between 125～4000Hz under 6% the situation;
Fig. 7 is that the present invention is 10mm at the height of the cylindrical shell 7 of first sandwich layer 2; The height of the cylindrical shell 7 of second sandwich layer 4 is 20mm, and the thickness of medium density fiber panel 1 is 3.5mm, and the aperture of through hole 1-1 is 4mm; Perforated percentage is that frequency is the sound absorption spectrogram between 125～4000Hz under 10% the situation;
Fig. 8 is that the present invention is 10mm at the height of the cylindrical shell 7 of first sandwich layer 2; The height of the cylindrical shell 7 of second sandwich layer 4 is 30mm, and the thickness of medium density fiber panel 1 is 3.5mm, and the aperture of through hole 1-1 is 6mm; Perforated percentage is that frequency is the sound absorption spectrogram between 125～4000Hz under 6% the situation;
Fig. 9 is that the acoustical board structure of a sandwich layer and two sandwich layers is that (wherein the A line is expressed as the acoustical board structure of a sandwich layer for sound absorption frequency spectrum comparison diagram between 125～4000Hz in frequency; The height of sandwich layer cylindrical shell is 40mm; The thickness of medium density fiber panel is 3.5mm; The aperture of through hole is 6mm, and perforated percentage is 6%; The B line is expressed as the acoustical board structure of two sandwich layers, and the height of the cylindrical shell 7 of first sandwich layer 2 is 10mm, and the height of the cylindrical shell 7 of second sandwich layer 4 is 30mm, and the thickness of medium density fiber panel 1 is 3.5mm, and the aperture of through hole 1-1 is 6mm, and perforated percentage is 6%).
Figure 10 is the structural representation of the specific embodiment ten.
The specific embodiment
The specific embodiment one: combine Fig. 1-Fig. 3 that this embodiment is described; The acoustical board of this embodiment comprises panel 1, backboard 5 and four support structure plates 6; Four support structure plates 6 are located between panel 1 and the backboard 5; Panel 1, backboard 5 and four support structure plates 6 surround a hollow rectangular structure; Said acoustical board comprises that also first sandwich layer 2, papery thin layer 3 and second sandwich layer, 4, the first sandwich layers 2, papery thin layer 3 and second sandwich layer 4 are located in the hollow rectangular structure, and first sandwich layer 2 is clipped between panel 1 and the papery thin layer 3 and the three links together; Second sandwich layer 4 is clipped between papery thin layer 3 and the backboard 5 and the three links together; First sandwich layer 2 and second sandwich layer 4 are cellular sandwich layer, and cellular sandwich layer is that hexagonal cylindrical shell 7 is stitched together and constitutes by a plurality of cross sections, and each cross section is that the inner chamber of hexagonal cylindrical shell is a honeycomb chamber; The honeycomb cavity volume rate of first sandwich layer 2 and second sandwich layer 4 is between 0.8-0.9; Having a plurality of and cross section on the panel 1 is hexagonal cylindrical shell 7 corresponding through hole 1-1, and each through hole 1-1 is that hexagonal cylindrical shell 7 is communicated with cross section, the cross-sectional area of each through hole 1-1 less than two of the cross-sectional area of cylindrical shell 7 corresponding with it/
Have only the sound absorption construction of a sandwich layer to have only a sound absorption peak value, two sound absorption peak values, the obvious broadening of sound sucting band scope have appearred in the sound absorption construction of two sandwich layers.Can be got by Fig. 9: the sound absorption construction of two sandwich layers increases to the low frequency absorption coefficient below the 250Hz, the high frequency sound absorption coefficient more than the 1000Hz is also increased, but then low to the intermediate frequency sound absorption coefficient between the 500-1000Hz than individual layer sound absorber.The former NRC=0.31, latter NRC=0.58, the advantage combination of the sound absorption construction of visible two sandwich layers almost is doubled its anti-acoustic capability.
The specific embodiment two: combine Fig. 1 that this embodiment is described; The perforated percentage of the panel 1 of this embodiment (hole area accounts for the percentage of plate area) is 3～10%; Through repeatedly experiment proof; Honeycomb cavity volume rate combines with panel 1 these two parameters of perforated percentage greater than 90%, has greatly improved sound absorption coefficient, and sound absorption coefficient can improve 8%-10%.Other composition and annexation are identical with the specific embodiment one.
The specific embodiment three: combine Fig. 1 that this embodiment is described, each through hole 1-1 of this embodiment is circular hole, square hole or delthyrium, and the aperture of said through hole 1-1 is 1～10mm.Other composition and annexation are identical with the specific embodiment one or two.
The specific embodiment four: combine Fig. 1 that this embodiment is described, the thickness of the panel 1 of this embodiment is 3～10mm.Other composition and annexation are identical with the specific embodiment three.
The specific embodiment five: combine Fig. 1 that this embodiment is described, the panel 1 of this embodiment is a kind of in wood based panel, bamboo wood jigsaw, veneer, facing shaving board, facing fiberboard or the wood-plastic clad plate.Other composition and annexation are identical with the specific embodiment four.
The specific embodiment six: combine Fig. 1 that this embodiment is described, first sandwich layer 2 of this embodiment and the thickness of second sandwich layer 4 are 10～80mm.Other composition and annexation are identical with the specific embodiment five.
The specific embodiment seven: combine Fig. 1 that this embodiment is described; First sandwich layer 2 of this embodiment and second sandwich layer 4 are a kind of in the cellular sandwich layer of papery, aluminum alloy honeycomb shape sandwich layer or the frp honeycomb shape sandwich layer, and said first sandwich layer 2 also can be made up of the different polylith cellular board of honeycomb aperture monolithic cellular board of the same size or honeycomb aperture with second sandwich layer 4.Other composition and annexation and specific embodiment six phase are together.
The specific embodiment eight: combine Fig. 1 that this embodiment is described; The upper surface of first sandwich layer 2 of this embodiment and the lower surface of panel 1 are bonding; The upper surface of the lower surface of first sandwich layer 2 and papery thin layer 3 is bonding; The lower surface of the upper surface of second sandwich layer 4 and papery thin layer 3 is bonding; The upper surface of the lower surface of second sandwich layer 4 and backboard 5 is bonding, and the environment-friendly type adhesive of the common adhesive of bonding employing or employing carpenter and furniture industry also can be urea-formaldehyde resin adhesive, phenolic resin glue, melamine resin adehsive, melamine urea-formaldehyde resin glue and epoxide-resin glue, polyurethane resin adhesive, mylar glue or isocyanate glue.Other composition and annexation are identical with the specific embodiment seven.
The specific embodiment nine: combine Fig. 1 that this embodiment is described, the papery thin layer 3 of this embodiment is universaling packing paper or packing board, like kraft, ordinary packing paper, kraft liner board; The thickness of papery thin layer 3 is 0.1～2mm; Papery thin layer 3 quantitatively be 80～120g/m2, fracture length adopts fiberboard rather than papery thin layer in the middle of the acoustical board structure of two present sandwich layers usually more than 6000m; Fiberboard plays effect attractive in appearance and reinforcing usually; Do not have sound absorption, and papery thin layer permeability is better and produce thin plate resonance effect, greatly improves the low frequency absorption performance.Other composition and annexation are identical with the specific embodiment eight.
The specific embodiment ten: combine Fig. 1 that this embodiment is described; The acoustical board of this embodiment also comprises a plurality of support intermediate plates 8; Be respectively arranged with a plurality of support intermediate plates 8 between the cylindrical shell 7 of said first sandwich layer 2 and between the cylindrical shell 7 of second sandwich layer 4, can make laminboard layer increase bearing value, improve the compressive strength of laminboard layer and the function of preapring for an unfavorable turn of events; Bending, distortion, fracture phenomena be can prevent, safety in utilization and application life strengthened.Other composition and annexation are identical with the specific embodiment nine.
Embodiment 1 (referring to Fig. 4):
A kind of broadband lightweight acoustical panels comprises panel 1, backboard 5 and four support structure plates 6; Four support structure plates 6 are located between panel 1 and the backboard 5; Panel 1, backboard 5 and four support structure plates 6 surround a hollow rectangular structure; Said acoustical board comprises that also first sandwich layer 2, papery thin layer 3 and second sandwich layer, 4, the first sandwich layers 2, papery thin layer 3 and second sandwich layer 4 are located in the hollow rectangular structure, and first sandwich layer 2 is clipped between panel 1 and the papery thin layer 3 and the three links together; Second sandwich layer 4 is clipped between papery thin layer 3 and the backboard 5 and the three links together; First sandwich layer 2 and second sandwich layer 4 are cellular sandwich layer, and cellular sandwich layer is that hexagonal cylindrical shell 7 is stitched together and constitutes by a plurality of cross sections, and each cross section is that the inner chamber of hexagonal cylindrical shell 7 is a honeycomb chamber; The honeycomb cavity volume rate of first sandwich layer 2 and second sandwich layer 4 is 0.84; Having a plurality of and cross section on the panel 1 is hexagonal cylindrical shell 7 corresponding through hole 1-1, and each through hole 1-1 is that hexagonal cylindrical shell 7 is communicated with cross section, and the cross-sectional area of each through hole 1-1 is less than 1/2nd of the cross-sectional area of cylindrical shell 7 corresponding with it.
The height of the cylindrical shell 7 of first sandwich layer 2 is 20mm, and the height of the cylindrical shell 7 of second sandwich layer 4 is 20mm, and the thickness of medium density fiber panel 1 is 3.5mm, and the aperture of through hole 1-1 is 2mm, and perforated percentage is 6%; Backboard 5 is selected wooden boards for use.The through hole 1-1 of panel 1 is connected with the honeycomb chamber of first sandwich layer 2, and papery thin layer 3 is clipped between first sandwich layer 2 and second sandwich layer 4, and second sandwich layer 4 is clipped between papery thin layer 3 and the backboard 5; Through experiment test; Noise reduction coefficient is 0.57, is that the first sound absorption peak appears in the 500Hz place in frequency, and sound absorption coefficient is 0.63; In frequency is that the second sound absorption peak appears in the 2000Hz place, and sound absorption coefficient is 0.81.In the 500-2000Hz frequency range, promptly the sound absorption coefficient at medium-high frequency place reaches 0.68.
Embodiment 2 (referring to Fig. 5):
A kind of broadband lightweight acoustical panels comprises panel 1, backboard 5 and four support structure plates 6; Four support structure plates 6 are located between panel 1 and the backboard 5; Panel 1, backboard 5 and four support structure plates 6 surround a hollow rectangular structure; Said acoustical board comprises that also first sandwich layer 2, papery thin layer 3 and second sandwich layer, 4, the first sandwich layers 2, papery thin layer 3 and second sandwich layer 4 are located in the hollow rectangular structure, and first sandwich layer 2 is clipped between panel 1 and the papery thin layer 3 and the three links together; Second sandwich layer 4 is clipped between papery thin layer 3 and the backboard 5 and the three links together; First sandwich layer 2 and second sandwich layer 4 are cellular sandwich layer, and cellular sandwich layer is that hexagonal cylindrical shell 7 is stitched together and constitutes by a plurality of cross sections, and each cross section is that the inner chamber of hexagonal cylindrical shell is a honeycomb chamber; The honeycomb cavity volume rate of first sandwich layer 2 and second sandwich layer 4 is 0.81; Having a plurality of and cross section on the panel 1 is hexagonal cylindrical shell 7 corresponding through hole 1-1, and each through hole 1-1 is that hexagonal cylindrical shell 7 is communicated with cross section, and the cross-sectional area of each through hole 1-1 is less than 1/2nd of the cross-sectional area of cylindrical shell 7 corresponding with it.
The height of the cylindrical shell 7 of first sandwich layer 2 is 20mm, and the height of the cylindrical shell 7 of second sandwich layer 4 is 20mm, and the thickness of medium density fiber panel 1 is 3.5mm, and the aperture of through hole 1-1 is 4mm, and perforated percentage is 3%; Backboard 5 is selected wooden boards for use.The perforation of panel 1 is connected with the honeycomb chamber of first sandwich layer 2, and papery thin layer 3 is clipped between first sandwich layer 2 and second sandwich layer 4, and second sandwich layer 4 is clipped between papery thin layer 3 and the backboard 5;: through experiment test; Noise reduction coefficient is 0.55, is that the first sound absorption peak appears in the 250Hz place in frequency, and sound absorption coefficient is 0.56; In frequency is that the second sound absorption peak appears in the 1000Hz place, and sound absorption coefficient is 0.85.In the frequency range of 250-1000Hz, promptly the sound absorption coefficient at medium and low frequency place reaches 0.64.
Embodiment 3 (referring to Fig. 6):
A kind of broadband lightweight acoustical panels comprises panel 1, backboard 5 and four support structure plates 6; Four support structure plates 6 are located between panel 1 and the backboard 5; Panel 1, backboard 5 and four support structure plates 6 surround a hollow rectangular structure; Said acoustical board comprises that also first sandwich layer 2, papery thin layer 3 and second sandwich layer, 4, the first sandwich layers 2, papery thin layer 3 and second sandwich layer 4 are located in the hollow rectangular structure, and first sandwich layer 2 is clipped between panel 1 and the papery thin layer 3 and the three links together; Second sandwich layer 4 is clipped between papery thin layer 3 and the backboard 5 and the three links together; First sandwich layer 2 and second sandwich layer 4 are cellular sandwich layer, and cellular sandwich layer is that hexagonal cylindrical shell 7 is stitched together and constitutes by a plurality of cross sections, and each cross section is that the inner chamber of hexagonal cylindrical shell is a honeycomb chamber; The honeycomb cavity volume rate of first sandwich layer 2 and second sandwich layer 4 is 0.82; Having a plurality of and cross section on the panel 1 is hexagonal cylindrical shell 7 corresponding through hole 1-1, and each through hole 1-1 is that hexagonal cylindrical shell 7 is communicated with cross section, and the cross-sectional area of each through hole 1-1 is less than 1/2nd of the cross-sectional area of cylindrical shell 7 corresponding with it.
The height of the cylindrical shell 7 of first sandwich layer 2 is 10mm, and the height of the cylindrical shell 7 of second sandwich layer 4 is 20mm, and the thickness of medium density fiber panel 1 is 3.5mm, and the aperture of through hole 1-1 is 4mm, and perforated percentage is 6%, and backboard 5 is selected wooden boards for use; The perforation of panel 1 is connected with the honeycomb chamber of first sandwich layer 2, and papery thin layer 3 is clipped between first sandwich layer 2 and second sandwich layer 4, and second sandwich layer 4 is clipped between papery thin layer 3 and the backboard 5; Through experiment test; Noise reduction coefficient is 0.61, is that the sound absorption peak appears in the 2000Hz place in frequency, and sound absorption coefficient is 0.89.In the frequency range of 500-2000Hz, promptly the sound absorption coefficient at medium-high frequency place reaches 0.72.
Embodiment 4 (referring to Fig. 7):
A kind of broadband lightweight acoustical panels comprises panel 1, backboard 5 and four support structure plates 6; Four support structure plates 6 are located between panel 1 and the backboard 5; Panel 1, backboard 5 and four support structure plates 6 surround a hollow rectangular structure; Said acoustical board comprises that also first sandwich layer 2, papery thin layer 3 and second sandwich layer, 4, the first sandwich layers 2, papery thin layer 3 and second sandwich layer 4 are located in the hollow rectangular structure, and first sandwich layer 2 is clipped between panel 1 and the papery thin layer 3 and the three links together; Second sandwich layer 4 is clipped between papery thin layer 3 and the backboard 5 and the three links together; First sandwich layer 2 and second sandwich layer 4 are cellular sandwich layer, and cellular sandwich layer is that hexagonal cylindrical shell 7 is stitched together and constitutes by a plurality of cross sections, and each cross section is that the inner chamber of hexagonal cylindrical shell is a honeycomb chamber; The honeycomb cavity volume rate of first sandwich layer 2 and second sandwich layer 4 is 0.83; Having a plurality of and cross section on the panel 1 is hexagonal cylindrical shell 7 corresponding through hole 1-1, and each through hole 1-1 is that hexagonal cylindrical shell 7 is communicated with cross section, and the cross-sectional area of each through hole 1-1 is less than 1/2nd of the cross-sectional area of cylindrical shell 7 corresponding with it.
The height of the cylindrical shell 7 of first sandwich layer 2 is 10mm, and the height of the cylindrical shell 7 of second sandwich layer 4 is 20mm, and the thickness of medium density fiber panel 1 is 3.5mm, and the aperture of through hole 1-1 is 4mm, and perforated percentage is 10%, and backboard 5 is selected wooden boards for use.The perforation of panel 1 is connected with the honeycomb chamber of first sandwich layer 2, and papery thin layer 3 is clipped between first sandwich layer 2 and second sandwich layer 4, and second sandwich layer 4 is clipped between papery thin layer 3 and the backboard 5; Through experiment test; Noise reduction coefficient is 0.58, is that the first sound absorption peak appears in the 500Hz place in frequency, and sound absorption coefficient is 0.62; In frequency is that the second sound absorption peak appears in the 2000Hz place, and sound absorption coefficient is 0.82.In the frequency range of 500-2000Hz, promptly the sound absorption coefficient at medium-high frequency place reaches 0.70.
Embodiment 5 (referring to Fig. 8):
A kind of broadband lightweight acoustical panels comprises panel 1, backboard 5 and four support structure plates 6; Four support structure plates 6 are located between panel 1 and the backboard 5; Panel 1, backboard 5 and four support structure plates 6 surround a hollow rectangular structure; Said acoustical board comprises that also first sandwich layer 2, papery thin layer 3 and second sandwich layer, 4, the first sandwich layers 2, papery thin layer 3 and second sandwich layer 4 are located in the hollow rectangular structure, and first sandwich layer 2 is clipped between panel 1 and the papery thin layer 3 and the three links together; Second sandwich layer 4 is clipped between papery thin layer 3 and the backboard 5 and the three links together; First sandwich layer 2 and second sandwich layer 4 are cellular sandwich layer, and cellular sandwich layer is that hexagonal cylindrical shell 7 is stitched together and constitutes by a plurality of cross sections, and each cross section is that the inner chamber of hexagonal cylindrical shell is a honeycomb chamber; The honeycomb cavity volume rate of first sandwich layer 2 and second sandwich layer 4 is 0.85; Having a plurality of and cross section on the panel 1 is hexagonal cylindrical shell 7 corresponding through hole 1-1, and each through hole 1-1 is that hexagonal cylindrical shell 7 is communicated with cross section, and the cross-sectional area of each through hole 1-1 is less than 1/2nd of the cross-sectional area of cylindrical shell 7 corresponding with it.
The height of the cylindrical shell 7 of first sandwich layer 2 is 10mm, and the height of the cylindrical shell 7 of second sandwich layer 4 is 30mm, and the thickness of medium density fiber panel 1 is 3.5mm, and the aperture of through hole is 6mm, and perforated percentage is 6%, and backboard 5 is selected wooden boards for use.The perforation of panel 1 is connected with the honeycomb chamber of first sandwich layer 2, and papery thin layer 3 is clipped between first sandwich layer 2 and second sandwich layer 4, and second sandwich layer 4 is clipped between papery thin layer 3 and the backboard 5; Through experiment test; Noise reduction coefficient is 0.55, is that the first sound absorption peak appears in the 250Hz place in frequency, and sound absorption coefficient is 0.49; In frequency is that the second sound absorption peak appears in the 2000Hz place, and sound absorption coefficient is 0.83.In the frequency range of 1000-2000Hz, promptly the sound absorption coefficient of high frequency treatment reaches 0.67.In the frequency range of 250-1000Hz, promptly the sound absorption coefficient at medium and low frequency place reaches 0.46.In the frequency range of 500-2000Hz, promptly the sound absorption coefficient at medium-high frequency place reaches 0.60.
Claims (10)
1. broadband lightweight acoustical panels; Said acoustical board comprises panel (1), backboard (5) and four support structure plates (6); Four support structure plates (6) are located between panel (1) and the backboard (5); Panel (1), backboard (5) and four support structure plates (6) surround a hollow rectangular structure; It is characterized in that: said acoustical board also comprises first sandwich layer (2), papery thin layer (3) and second sandwich layer (4), and first sandwich layer (2), papery thin layer (3) and second sandwich layer (4) are located in the hollow rectangular structure, and first sandwich layer (2) is clipped between panel (1) and the papery thin layer (3) and the three links together; Second sandwich layer (4) is clipped between papery thin layer (3) and the backboard (5) and the three links together; First sandwich layer (2) and second sandwich layer (4) are cellular sandwich layer, and cellular sandwich layer is hexagonal cylindrical shell (7) formation that is stitched together by a plurality of cross sections, and each cross section is that the inner chamber of hexagonal cylindrical shell is a honeycomb chamber; The honeycomb cavity volume rate of first sandwich layer (2) and second sandwich layer (4) is between 0.8-0.9; Having a plurality of and cross section on the panel (1) is the corresponding through hole of hexagonal cylindrical shell (7) (1-1), and each through hole (1-1) is that hexagonal cylindrical shell (7) is communicated with cross section, and the cross-sectional area of each through hole (1-1) is less than 1/2nd of the cross-sectional area of cylindrical shell corresponding with it (7).
2. according to the said broadband lightweight acoustical panels of claim 1, the perforated percentage that it is characterized in that said panel (1) is 3～10%.
3. according to claim 1 or 2 said broadband lightweight acoustical panels, it is characterized in that each through hole (1-1) is circular hole, square hole or delthyrium, the aperture of said through hole (1-1) is 1～10mm.
4. according to the said broadband lightweight acoustical panels of claim 3, the thickness that it is characterized in that said panel (1) is 3～10mm.
5. according to the said broadband lightweight acoustical panels of claim 4, it is characterized in that a kind of in wood based panel, bamboo wood jigsaw, veneer, facing shaving board, facing fiberboard or the wood-plastic clad plate of said panel (1).
6. according to the said broadband lightweight acoustical panels of claim 5, it is characterized in that the thickness of first sandwich layer (2) and second sandwich layer (4) is 10～80mm.
7. according to the said broadband lightweight acoustical panels of claim 6, it is characterized in that a kind of in the cellular sandwich layer of papery, aluminum alloy honeycomb shape sandwich layer or the frp honeycomb shape sandwich layer of first sandwich layer (2) and second sandwich layer (4).
8. according to the said broadband lightweight acoustical panels of claim 7; The lower surface of upper surface and panel (1) that it is characterized in that first sandwich layer (2) is bonding; The upper surface of the lower surface of first sandwich layer (2) and papery thin layer (3) is bonding; The lower surface of the upper surface of second sandwich layer (4) and papery thin layer (3) is bonding, and the upper surface of the lower surface of second sandwich layer (4) and backboard (5) is bonding.
9. said according to Claim 8 broadband lightweight acoustical panels is characterized in that papery thin layer (3) is universaling packing paper or packing board, and the thickness of papery thin layer (3) is 0.1～2mm.
10. according to the said broadband lightweight acoustical panels of claim 9, it is characterized in that said acoustical board also comprises a plurality of support intermediate plates 8, be respectively arranged with a plurality of support intermediate plates 8 between the cylindrical shell 7 of said first sandwich layer 2 and between the cylindrical shell 7 of second sandwich layer 4.
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| CN102644333A (en) * | 2012-04-20 | 2012-08-22 | 上海捷成企业管理集团有限公司 | Honeycomb material made of bamboos |
| CN104542173A (en) * | 2015-01-26 | 2015-04-29 | 浙江农林大学 | Noise-reduction forest belt built by in vivo perforation noise-reduction bamboo forest and building method thereof |
| CN104875430A (en) * | 2015-04-30 | 2015-09-02 | 北京空间飞行器总体设计部 | Variable aperture micropore honeycomb sandwich structural slab |
| EP2937483A1 (en) * | 2014-04-24 | 2015-10-28 | STIA - Holzindustrie Gesellschaft m.b.H. | Building panel, in particular wall or ceiling panel |
| CN105109147A (en) * | 2015-09-09 | 2015-12-02 | 西安交通大学 | Polygon structure composite acoustic board based on negative mass |
| CN105714944A (en) * | 2016-03-23 | 2016-06-29 | 西安交通大学 | Sound absorption bearing plate with square honeycomb-ripple compound structure |
| CN105821980A (en) * | 2016-03-23 | 2016-08-03 | 西安交通大学 | Sound-absorbing loading plate with hexagonal honeycomb-corrugation complex structure |
| CN107199439A (en) * | 2017-05-18 | 2017-09-26 | 西安交通大学 | A kind of square honeycomb sandwich construction and preparation method thereof |
| CN108422729A (en) * | 2017-09-22 | 2018-08-21 | 东北林业大学 | A kind of broadband sound absorption structure Wood composite flitch |
| CN109448689A (en) * | 2018-12-31 | 2019-03-08 | 桂林电子科技大学 | A kind of denoising device for more dirt workshops |
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| CN102644333A (en) * | 2012-04-20 | 2012-08-22 | 上海捷成企业管理集团有限公司 | Honeycomb material made of bamboos |
| EP2937483A1 (en) * | 2014-04-24 | 2015-10-28 | STIA - Holzindustrie Gesellschaft m.b.H. | Building panel, in particular wall or ceiling panel |
| CN104542173A (en) * | 2015-01-26 | 2015-04-29 | 浙江农林大学 | Noise-reduction forest belt built by in vivo perforation noise-reduction bamboo forest and building method thereof |
| CN104875430A (en) * | 2015-04-30 | 2015-09-02 | 北京空间飞行器总体设计部 | Variable aperture micropore honeycomb sandwich structural slab |
| CN105109147A (en) * | 2015-09-09 | 2015-12-02 | 西安交通大学 | Polygon structure composite acoustic board based on negative mass |
| CN105714944A (en) * | 2016-03-23 | 2016-06-29 | 西安交通大学 | Sound absorption bearing plate with square honeycomb-ripple compound structure |
| CN105821980A (en) * | 2016-03-23 | 2016-08-03 | 西安交通大学 | Sound-absorbing loading plate with hexagonal honeycomb-corrugation complex structure |
| CN107199439A (en) * | 2017-05-18 | 2017-09-26 | 西安交通大学 | A kind of square honeycomb sandwich construction and preparation method thereof |
| CN108422729A (en) * | 2017-09-22 | 2018-08-21 | 东北林业大学 | A kind of broadband sound absorption structure Wood composite flitch |
| CN109448689A (en) * | 2018-12-31 | 2019-03-08 | 桂林电子科技大学 | A kind of denoising device for more dirt workshops |
| CN113700190A (en) * | 2020-05-20 | 2021-11-26 | 福建和其祖林业科技有限公司 | Light building curtain wall board and preparation method thereof |
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Application publication date: 20120111 |