TWI752540B

TWI752540B - Sound absorption device

Info

Publication number: TWI752540B
Application number: TW109122078A
Authority: TW
Inventors: 蔡耀賢; 馬發鑫; 曾品緁
Original assignee: 國立成功大學
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2022-01-11
Also published as: TW202202701A

Abstract

A sound absorption device includes a frame, a canvas, a hard board, and a hole board. The frame is rectangular ring shape like and defines an inner space. The canvas is disposed on one side of the frame. The hard board is disposed on the other side of the frame and is apart from canvas. The hole board is disposed inside the frame, between the canvas and the hard board, and apart from the hard board. Since the canvas can be painted to form a painting, this sound absorption device can be used as both a decoration and a sound absorption piece.

Description

sound absorbing device

本發明是有關於一種能吸收多餘噪音的吸音裝置，特別是指一種利用共振原理吸收噪音之吸音裝置。The present invention relates to a sound-absorbing device capable of absorbing excess noise, in particular to a sound-absorbing device utilizing the resonance principle to absorb noise.

參閱圖1，一種現有的吸音裝置，包括一剛性板材11、一裝設在該剛性板材11周緣的邊框12，以及一裝設在該邊框12上並與該剛性板材11相間隔的穿孔板材13。該剛性板材11、該邊框12及該穿孔板材13，相配合圍繞界定出一內部空間14。Referring to FIG. 1 , a conventional sound-absorbing device includes a rigid board 11 , a frame 12 installed on the periphery of the rigid board 11 , and a perforated board 13 installed on the frame 12 and spaced from the rigid board 11 . . The rigid plate 11 , the frame 12 and the perforated plate 13 cooperate to define an inner space 14 .

此種現有的吸音裝置能利用共振原理吸音，相較於以往的玻璃棉及泡棉吸音材料等，具有防火防潮且不易產生會危害人體健康之纖維等優點。惟此種吸音裝置較不美觀，無法成為室內裝飾的一部分，有待改善。The existing sound-absorbing device can absorb sound by utilizing the resonance principle. Compared with the conventional glass wool and foam sound-absorbing materials, it has the advantages of fireproof and moisture-proof, and is not easy to produce fibers that may endanger human health. However, this kind of sound-absorbing device is relatively unsightly and cannot be a part of interior decoration, and needs to be improved.

本發明的目的在於：提供一種能夠克服先前技術的至少一個缺點的吸音裝置。It is an object of the present invention to provide a sound absorbing device that overcomes at least one of the disadvantages of the prior art.

該吸音裝置，包含一邊框、一表布、一剛性板材，以及一穿孔板材。The sound-absorbing device includes a frame, a surface cloth, a rigid board, and a perforated board.

該邊框呈環狀並圍繞界定出一框內空間。該表布張設在該邊框的其中一側，並覆蓋該框內空間。該剛性板材設置在該邊框的另外一側，並覆蓋該框內空間，且與該表布相間隔。該穿孔板材設置在該邊框中，位於該表布及該剛性板材間，且與該剛性板材相間隔。The frame is annular and defines an inner space around the frame. The table cloth is arranged on one side of the frame and covers the space inside the frame. The rigid board is arranged on the other side of the frame, covers the space inside the frame, and is spaced from the surface cloth. The perforated plate is arranged in the frame, between the surface cloth and the rigid plate, and is spaced from the rigid plate.

本發明的功效在於：該表布能供繪畫一類的藝術創作揮灑，故本發明吸音裝置具有兼備裝飾與吸音雙重效果之特點。The effect of the present invention is that the surface cloth can be used for artistic creations such as painting, so the sound-absorbing device of the present invention has the characteristics of both decoration and sound-absorbing.

在以下的說明內容中，類似或相同的元件將以相同的編號來表示。In the following description, similar or identical elements will be denoted by the same reference numerals.

《實施例1》"Example 1"

參閱圖3至5，本發明吸音裝置的一個實施例1，包含一個呈長方環狀的邊框2、一張設在該邊框2其中一側的表布3、一塊架設在該邊框2的另外一側並與該表布3相間隔的剛性板材4、一個裝設在該邊框2中並位於該表布3與該剛性板材4間的框架5，以及一塊設置在該框架5上並位於該邊框2中的穿孔板材6。Referring to FIGS. 3 to 5 , an embodiment 1 of the sound-absorbing device of the present invention includes a rectangular ring-shaped frame 2 , a surface cloth 3 arranged on one side of the frame 2 , and another frame arranged on the frame 2 . A rigid plate 4 on one side and spaced from the cloth 3, a frame 5 installed in the frame 2 and located between the cloth 3 and the rigid plate 4, and a piece disposed on the frame 5 and located in the Perforated sheet 6 in frame 2.

該邊框2的一個框體厚度211為100mm，且沿長度方向延伸的一個延伸長度212為1800mm，沿寬度方向延伸的一個延伸寬度213則為1200mm。在本發明的其他實施態樣中，該框體厚度211也能為 xmm，其中 x=100～200，並能為100～200間的整數。 A frame thickness 211 of the frame 2 is 100 mm, an extension length 212 extending along the length direction is 1800 mm, and an extension width 213 extending along the width direction is 1200 mm. In other embodiments of the present invention, the frame thickness 211 can also be x mm, where x =100-200, and can be an integer between 100-200.

該邊框2為木框，並包括兩個沿長度方向延伸且沿寬度方向彼此間隔的長框段22，以及兩個沿寬度方向延伸且沿長度方向彼此間隔並連接於該等長框段22間的短框段23。The frame 2 is a wooden frame, and includes two long frame sections 22 extending in the length direction and spaced apart from each other in the width direction, and two extending in the width direction and spaced apart from each other in the length direction and connected between the long frame sections 22 The short frame segment 23.

該等長框段22與該等短框段23相配合圍繞界定出一框內空間24。該框內空間24包括彼此相反的一第一框口241與一第二框口242。The long frame segments 22 cooperate with the short frame segments 23 to define an inner frame space 24 around them. The inner frame space 24 includes a first frame opening 241 and a second frame opening 242 opposite to each other.

在本實施例1中，該表布3為仿麻材質的畫布，且長寬尺寸大於該框內空間24的該第一框口241的長寬尺寸，而能整個覆蓋住該第一框口241。In the present embodiment 1, the surface cloth 3 is a canvas imitating hemp material, and the length and width are larger than the length and width of the first frame opening 241 of the frame space 24, and can completely cover the first frame opening 241.

於本實施例1中，該表布3的面密度為0.36 kg/m ²，在本發明的其他實施態樣中，該表布3的面密度也為0.03～2.3kg/m ²。只要該表布3的面密度在前述限定範圍中，該表布3也能為一般的棉布或別種材質的表布3。其中，面密度的意義為某一物體，單位面積所包含的質量，亦即：面密度=質量÷面積=密度×厚度。 In Example 1, the surface density of the surface cloth 3 is 0.36 kg/m ² , and in other embodiments of the present invention, the surface density of the surface cloth 3 is also 0.03 to 2.3 kg/m ² . As long as the surface density of the surface cloth 3 is within the aforementioned limited range, the surface cloth 3 can also be a general cotton cloth or a surface cloth 3 of other materials. Among them, the meaning of surface density is the mass contained in a unit area of a certain object, that is: surface density = mass ÷ area = density × thickness.

該剛性板材4為木板，且長寬尺寸與該邊框2的長寬尺寸相當，而能整個覆蓋住該框內空間24的該第二框口242。在本發明的其他實施態樣中，該剛性板材4也能為硬度與木材相仿的剛性板材4，但並不以木材為限。The rigid board 4 is a wooden board, and the length and width dimensions are equivalent to those of the frame 2 , and can completely cover the second frame opening 242 of the frame inner space 24 . In other embodiments of the present invention, the rigid board 4 can also be a rigid board 4 whose hardness is similar to that of wood, but is not limited to wood.

該框架5包括一個呈長方環狀並貼靠組裝於該邊框2內周面的圍框段51，以及一條沿寬度方向延伸且跨接該圍框段51的支撐段52。The frame 5 includes an enclosing frame section 51 in the shape of a rectangular ring and assembled against the inner peripheral surface of the frame 2 , and a support section 52 extending along the width direction and bridging the enclosing frame section 51 .

該穿孔板材6與該表布3及該剛性板材4相間隔地位於該表布3與該剛性板材4間，主要由鋁金屬製成，且長寬尺寸與該框內空間24的長寬尺寸相當，故該穿孔板材6的周緣抵接該邊框2的內周面。The perforated plate 6 is located between the surface cloth 3 and the rigid plate 4 at a distance from the surface cloth 3 and the rigid plate 4 . Accordingly, the peripheral edge of the perforated plate 6 abuts against the inner peripheral surface of the frame 2 .

該穿孔板材6的面密度為2.25kg/m ²，但在本發明的其他實施態樣中，該穿孔板材6的面密度也能為0.24～12kg/m ²。只要該穿孔板材6的面密度在前述限定範圍中，該穿孔板材6也能為其他材質的穿孔板材6。 The areal density of the perforated plate 6 is 2.25 kg/m ² , but in other embodiments of the present invention, the areal density of the perforated plate 6 can also be 0.24 to 12 kg/m ² . As long as the areal density of the perforated plate 6 is within the aforementioned limited range, the perforated plate 6 can also be a perforated plate 6 of other materials.

該穿孔板材6的一個板材厚度61為1.2mm，且與該剛性板材4的一個間隔距離D1為30mm，並形成有數個貫孔62。該等貫孔62數個為一組地左右排成數列中的其中一列，且每一列的該等貫孔62與相鄰前後兩列的該等貫孔62左右錯位。更具體一點來說，該等貫孔62是以每四個一組且概呈菱形地排列。A plate thickness 61 of the perforated plate 6 is 1.2 mm, a distance D1 from the rigid plate 4 is 30 mm, and several through holes 62 are formed. The through-holes 62 are arranged in a group in one row in the left and right rows, and the through-holes 62 in each row and the through-holes 62 in the adjacent front and rear rows are staggered left and right. More specifically, the through-holes 62 are arranged in groups of four and approximately in a diamond shape.

同一列中左右相鄰的兩貫孔62的兩個孔中心的連線距離L1為2mm。每一列的該等貫孔62與另一列的該等貫孔62的間隔距離L2，或者說列與列之間的間隔距離L2為1.8mm。The connecting line distance L1 between the centers of the two through holes 62 adjacent to the left and right in the same row is 2 mm. The spacing distance L2 between the through holes 62 in each row and the through holes 62 in another row, or the spacing distance L2 between the rows, is 1.8 mm.

在本發明的其他實施態樣中，該間隔距離D1也能為 ymm，其中 y=30～200且不大於 x，並能為30～200間且不大於 x的整數。 In other embodiments of the present invention, the separation distance D1 can also be y mm, where y =30-200 and not greater than x , and can be an integer between 30-200 and not greater than x.

《實施例2～4》"Examples 2 to 4"

參閱圖6～8，實施例2～4的結構分別如圖6～8所示。實施例2～4與實施例1類似，不同的地方在於實施例2、3與實施例1同為表布3與穿孔板材6彼此間隔分離的板布分離型，實施例4為表布3與板材6貼靠在一起的板布合一型。實施例2～4的該間隔距離D1記錄於表1中。Referring to Figures 6-8, the structures of Embodiments 2-4 are shown in Figures 6-8, respectively. Embodiments 2 to 4 are similar to Embodiment 1, except that Embodiments 2 and 3 and Embodiment 1 are the same as the sheet cloth separation type in which the surface cloth 3 and the perforated plate 6 are separated from each other. The board and cloth are integrated into one type in which the boards 6 are attached to each other. The separation distance D1 of Examples 2 to 4 is recorded in Table 1.

其中，由於實施例4中的該穿孔板材6貼靠該表布3，故以該框體厚度211為100mm計，扣除該穿孔板材6本身的板材厚度61為1.2mm後，該間隔距離D1為98.8mm。另外，由於實施例4為板布合一型，因此該穿孔板材6與該表布3一同計算之面密度為2.61 kg/m ²。 Wherein, since the perforated plate 6 in Example 4 is in contact with the surface cloth 3, the thickness 211 of the frame is calculated as 100 mm, after deducting the plate thickness 61 of the perforated plate 6 itself to be 1.2 mm, the spacing distance D1 is 98.8mm. In addition, since Example 4 is a sheet-clothing type, the areal density of the perforated sheet 6 and the surface cloth 3 calculated together is 2.61 kg/m ² .

在本發明的其他實施態樣中，針對板布合一型，該穿孔板材6與該表布3一同計算之面密度也能0.03～3.6kg/m ²。 In other embodiments of the present invention, for the sheet-cloth-integrated type, the surface density of the perforated sheet 6 and the surface cloth 3 calculated together can also be 0.03-3.6 kg/m ² .

《實施例5～10》"Examples 5 to 10"

參閱圖9～14，實施例5～10的結構分別如圖9～14所示。實施例5～10與實施例1類似，不同的地方在於該邊框2的該框體厚度211為200mm，且各實施例的該間隔距離D1或有不同，各實施例的該間隔距離D1具體記錄於表2中。其中，實施例5～9為板布分離型，實施例10為板布合一型。Referring to FIGS. 9-14 , the structures of Embodiments 5-10 are shown in FIGS. 9-14 , respectively. Embodiments 5 to 10 are similar to Embodiment 1, the difference is that the frame thickness 211 of the frame 2 is 200 mm, and the separation distance D1 of each embodiment may be different, and the separation distance D1 of each embodiment is specifically recorded. in Table 2. Among them, Examples 5 to 9 are of the sheet-cloth separation type, and Example 10 is the sheet-cloth integrated type.

其中，實施例10的該穿孔板材6貼靠該表布3，以該框體厚度211為200mm計，扣除該穿孔板材6本身的板材厚度61為1.2mm，該間隔距離D1為198.8mm。Wherein, the perforated plate 6 of Example 10 is attached to the surface cloth 3, the thickness 211 of the frame is 200 mm, the thickness 61 of the perforated plate 6 itself is 1.2 mm, and the distance D1 is 198.8 mm.

《吸音效果測試》"Sound Absorption Test"

每一實施例以兩個為一組，以長邊彼此連接的方式並排設置，並以CNS 9056(或ISO 354:2003，內容同CNS 9056)方法量測吸音係數，並將不同頻率下所測得的吸音係數，記錄於表1、2中。其中，吸音係數越高，代表吸音效果越好。In each example, two are set as a group, and the long sides are connected to each other. The obtained sound absorption coefficients are recorded in Tables 1 and 2. Among them, the higher the sound absorption coefficient, the better the sound absorption effect.

《結果說明》"Results Statement"

從實驗結果來看，實施例1～10均能產生一定的吸音效果。其中，當該邊框2的框體厚度211為100mm，且該間隔距離D1為30、50、75或98.8mm時，對於250～500Hz的聲音，吸音係數都能在0.5以上；而當該邊框2的框體厚度211為200mm，且該間隔距離D1為75、100、150或198.8mm時，對於200～400Hz的聲音，吸音係數都能在0.5以上。由此可知，實施例1～4及實施例7～10在前述的特定框體厚度211與特定間隔距離D1的條件下，還能有吸音係數在0.5以上的更進一步的較佳吸音效果。From the experimental results, all of Examples 1 to 10 can produce a certain sound-absorbing effect. Wherein, when the frame thickness 211 of the frame 2 is 100 mm, and the distance D1 is 30, 50, 75 or 98.8 mm, the sound absorption coefficient can be above 0.5 for the sound of 250-500 Hz; and when the frame 2 When the thickness 211 of the frame body is 200mm, and the distance D1 is 75, 100, 150 or 198.8mm, the sound absorption coefficient can be above 0.5 for the sound of 200-400Hz. It can be seen that under the conditions of the specific frame thickness 211 and the specific separation distance D1 described above, Examples 1 to 4 and Examples 7 to 10 can still have a further better sound absorption effect with a sound absorption coefficient of 0.5 or more.

綜上所述，本發明吸音裝置的功效在於：該表布3能供繪畫一類的藝術創作揮灑，故本發明吸音裝置具有兼備裝飾與吸音雙重效果之特點。此外，當該邊框2的框體厚度211為100mm，且該間隔距離D1為30、50、75或98.8mm時，或者該邊框2的框體厚度211為200mm，且該間隔距離D1為75、100、150或198.8公分時，分別對於250～500Hz的聲音及200～400Hz的聲音，有更進一步的較佳吸音效果。To sum up, the effect of the sound-absorbing device of the present invention is that the surface cloth 3 can be used for artistic creations such as painting, so the sound-absorbing device of the present invention has the characteristics of both decoration and sound absorption. In addition, when the frame thickness 211 of the frame 2 is 100 mm, and the separation distance D1 is 30, 50, 75 or 98.8 mm, or the frame thickness 211 of the frame 2 is 200 mm, and the separation distance D1 is 75, At 100, 150 or 198.8 cm, it has a further better sound absorption effect for the sound of 250-500Hz and the sound of 200-400Hz respectively.

以上所述者，僅為本發明的實施例而已，不能以此限定本發明的申請專利範圍，且依本發明申請專利範圍及專利說明書簡單等效變化與修飾之態樣，亦應為本發明申請專利範圍所涵蓋。 [表1] 實施例1 實施例2 實施例3 實施例4 間隔距離 (mm) 30 50 75 98.8 框體厚度(mm) 100 1/3倍頻帶頻率(Hz) 吸音係數 100 0.10 0.15 0.21 0.25 125 0.14 0.20 0.21 0.33 160 0.15 0.19 0.27 0.39 200 0.24 0.46 0.55 0.63 250 0.53 0.67 0.74 0.75 315 0.55 0.58 0.64 0.67 400 0.61 0.81 0.75 0.62 500 0.56 0.76 0.73 0.60 630 0.44 0.64 0.73 0.55 800 0.31 0.49 0.64 0.53 1000 0.25 0.37 0.50 0.49 1250 0.19 0.26 0.37 0.44 1600 0.16 0.21 0.27 0.35 2000 0.19 0.20 0.24 0.35 2500 0.22 0.19 0.24 0.34 3150 0.26 0.18 0.24 0.31 4000 0.24 0.13 0.25 0.26 5000 0.29 0.17 0.35 0.31 [表2] 實施例5 實施例6 實施例7 實施例8 實施例9 實施例10 間隔距離(mm) 30 50 75 100 150 198.8 框體厚度(mm) 200 1/3倍頻帶頻率(Hz) 吸音係數 100 0.19 0.17 0.22 0.27 0.37 0.64 125 0.35 0.26 0.34 0.38 0.54 0.80 160 0.32 0.27 0.41 0.62 0.66 0.66 200 0.46 0.37 0.59 0.88 0.85 0.70 250 0.48 0.45 0.82 0.91 0.87 0.76 315 0.39 0.37 0.65 0.74 0.82 0.66 400 0.26 0.38 0.51 0.66 0.85 0.62 500 0.25 0.33 0.45 0.58 0.79 0.55 630 0.22 0.26 0.35 0.43 0.65 0.49 800 0.19 0.23 0.26 0.31 0.50 0.46 1000 0.21 0.21 0.21 0.23 0.39 0.47 1250 0.28 0.24 0.20 0.22 0.30 0.45 1600 0.27 0.28 0.26 0.22 0.25 0.42 2000 0.27 0.25 0.28 0.27 0.25 0.40 2500 0.29 0.27 0.25 0.26 0.25 0.39 3150 0.29 0.24 0.22 0.28 0.25 0.34 4000 0.25 0.20 0.19 0.27 0.28 0.28 5000 0.29 0.19 0.15 0.36 0.30 0.25 The above descriptions are merely examples of the present invention, which cannot limit the scope of the patent application of the present invention, and the simple equivalent changes and modifications according to the patent application scope of the present invention and the patent specification should also be considered as the present invention. Covered by the scope of the patent application. [Table 1] Example 1 Example 2 Example 3 Example 4 Spacing distance (mm) 30 50 75 98.8 Frame thickness (mm) 100 1/3 Octave Band Frequency (Hz) sound absorption coefficient 100 0.10 0.15 0.21 0.25 125 0.14 0.20 0.21 0.33 160 0.15 0.19 0.27 0.39 200 0.24 0.46 0.55 0.63 250 0.53 0.67 0.74 0.75 315 0.55 0.58 0.64 0.67 400 0.61 0.81 0.75 0.62 500 0.56 0.76 0.73 0.60 630 0.44 0.64 0.73 0.55 800 0.31 0.49 0.64 0.53 1000 0.25 0.37 0.50 0.49 1250 0.19 0.26 0.37 0.44 1600 0.16 0.21 0.27 0.35 2000 0.19 0.20 0.24 0.35 2500 0.22 0.19 0.24 0.34 3150 0.26 0.18 0.24 0.31 4000 0.24 0.13 0.25 0.26 5000 0.29 0.17 0.35 0.31 [Table 2] Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Spacing distance (mm) 30 50 75 100 150 198.8 Frame thickness (mm) 200 1/3 Octave Band Frequency (Hz) sound absorption coefficient 100 0.19 0.17 0.22 0.27 0.37 0.64 125 0.35 0.26 0.34 0.38 0.54 0.80 160 0.32 0.27 0.41 0.62 0.66 0.66 200 0.46 0.37 0.59 0.88 0.85 0.70 250 0.48 0.45 0.82 0.91 0.87 0.76 315 0.39 0.37 0.65 0.74 0.82 0.66 400 0.26 0.38 0.51 0.66 0.85 0.62 500 0.25 0.33 0.45 0.58 0.79 0.55 630 0.22 0.26 0.35 0.43 0.65 0.49 800 0.19 0.23 0.26 0.31 0.50 0.46 1000 0.21 0.21 0.21 0.23 0.39 0.47 1250 0.28 0.24 0.20 0.22 0.30 0.45 1600 0.27 0.28 0.26 0.22 0.25 0.42 2000 0.27 0.25 0.28 0.27 0.25 0.40 2500 0.29 0.27 0.25 0.26 0.25 0.39 3150 0.29 0.24 0.22 0.28 0.25 0.34 4000 0.25 0.20 0.19 0.27 0.28 0.28 5000 0.29 0.19 0.15 0.36 0.30 0.25

2:邊框2: border

211:框體厚度211: Frame thickness

212:延伸長度212: Extended Length

213:延伸寬度213:Extended width

22:長框段22: Long frame segment

23:短框段23: Short frame segment

24:框內空間24: Space inside the frame

241:第一框口241: The first frame

242:第二框口242: Second frame

3:表布3: table cloth

4:剛性板材4: Rigid sheet

5:框架5: Frame

51:圍框段51: Surrounding frame segment

52:支撐段52: Support segment

6:穿孔板材6: perforated sheet

61:板材厚度61: Sheet thickness

62:貫孔62: Through hole

D1:間隔距離D1: separation distance

L1:連線距離L1: connection distance

L2:間隔距離L2: separation distance

本發明其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中：圖1是一個立體分解圖，說明一個現有的吸音裝置；圖2是一個組合剖視圖，說明該現有的吸音裝置；圖3是一個立體分解圖，說明本發明吸音裝置的一個實施例1；圖4是一個組合剖視圖，說明該實施例1，圖中的數個貫孔僅為示意，並不代表實際情形；圖5是一個不完整的俯視圖，說明該等貫孔的排列方式；圖6是一個組合剖視圖，說明本發明吸音裝置的一個實施例2，圖中的數個貫孔僅為示意，並不代表實際情形；圖7是一個組合剖視圖，說明本發明吸音裝置的一個實施例3，圖中的數個貫孔僅為示意，並不代表實際情形；圖8是一個組合剖視圖，說明本發明吸音裝置的一個實施例4，圖中的數個貫孔僅為示意，並不代表實際情形；圖9是一個組合剖視圖，說明本發明吸音裝置的一個實施例5，圖中的數個貫孔僅為示意，並不代表實際情形；圖10是一個組合剖視圖，說明本發明吸音裝置的一個實施例6，圖中的數個貫孔僅為示意，並不代表實際情形；圖11是一個組合剖視圖，說明本發明吸音裝置的一個實施例7，圖中的數個貫孔僅為示意，並不代表實際情形；圖12是一個組合剖視圖，說明本發明吸音裝置的一個實施例8，圖中的數個貫孔僅為示意，並不代表實際情形；圖13是一個組合剖視圖，說明本發明吸音裝置的一個實施例9，圖中的數個貫孔僅為示意，並不代表實際情形；及圖14是一個組合剖視圖，說明本發明吸音裝置的一個實施例10，圖中的數個貫孔僅為示意，並不代表實際情形。 Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: Figure 1 is an exploded perspective view illustrating a conventional sound absorbing device; Figure 2 is a combined cross-sectional view illustrating the conventional sound absorbing device; 3 is an exploded perspective view illustrating an embodiment 1 of the sound absorbing device of the present invention; FIG. 4 is a combined cross-sectional view illustrating Embodiment 1, and the several through holes in the figure are for illustration only and do not represent the actual situation; Figure 5 is an incomplete top view illustrating the arrangement of the through holes; FIG. 6 is a combined cross-sectional view illustrating an embodiment 2 of the sound-absorbing device of the present invention, and several through holes in the figure are only schematic and do not represent the actual situation; FIG. 7 is a combined cross-sectional view illustrating a third embodiment of the sound-absorbing device of the present invention, and the several through holes in the figure are only schematic and do not represent the actual situation; 8 is a combined cross-sectional view illustrating an embodiment 4 of the sound-absorbing device of the present invention, and the several through holes in the figure are only for illustration and do not represent the actual situation; FIG. 9 is a combined cross-sectional view illustrating an embodiment 5 of the sound-absorbing device of the present invention, and the several through holes in the figure are only schematic and do not represent the actual situation; 10 is a combined cross-sectional view illustrating an embodiment 6 of the sound-absorbing device of the present invention, and the several through holes in the figure are only for illustration and do not represent the actual situation; Fig. 11 is a combined cross-sectional view illustrating an embodiment 7 of the sound-absorbing device of the present invention, and the several through holes in the figure are for illustration only and do not represent the actual situation; Fig. 12 is a combined cross-sectional view illustrating an embodiment 8 of the sound-absorbing device of the present invention, and the several through holes in the figure are only schematic and do not represent the actual situation; FIG. 13 is a combined cross-sectional view illustrating an embodiment 9 of the sound-absorbing device of the present invention. The several through holes in the figure are for illustration only and do not represent the actual situation; and FIG. 14 is a combined cross-sectional view illustrating an embodiment 10 of the sound absorbing device of the present invention. The several through holes in the figure are for illustration only and do not represent the actual situation.

2:邊框 2: border

211:框體厚度 211: Frame thickness

212:延伸長度 212: Extended Length

213:延伸寬度 213:Extended width

22:長框段 22: Long frame segment

23:短框段 23: Short frame segment

24:框內空間 24: Space inside the frame

241:第一框口 241: The first frame

242:第二框口 242: Second frame

3:表布 3: table cloth

4:剛性板材 4: Rigid sheet

5:框架 5: Frame

51:圍框段 51: Surrounding frame segment

52:支撐段 52: Support segment

6:穿孔板材 6: perforated sheet

62:貫孔 62: Through hole

Claims

A sound-absorbing device, comprising: a frame, in the shape of a ring, and defining a space in the frame; a surface cloth, stretched on one side of the frame and covering the space in the frame; a rigid plate, arranged on the frame the other side of the frame, covering the space in the frame, and being spaced from the surface cloth; and a perforated plate, arranged in the frame, between the surface cloth and the rigid plate, and spaced from the rigid plate; Wherein, the surface cloth is spaced from the perforated plate, and the surface density of the surface cloth is 0.03~2.3kg/m ² , and the areal density of the perforated plate is 0.24~12kg/m ² ; wherein, for the sound of 250Hz~400Hz The sound absorption coefficient is above 0.5.

The sound-absorbing device according to claim 1, wherein the thickness of a frame of the frame is x mm, x =100~200, a distance between the perforated plate and the rigid plate is y mm, y =30~200 and y is not greater than x .

The sound-absorbing device according to claim 2, wherein the thickness of the frame body is 100 mm, and the spacing distance is 30 mm, 50 mm, 75 mm, or 98.8 mm.

The sound-absorbing device according to claim 2, wherein the thickness of the frame body is 200 mm, and the spacing distance is 75 mm, 100 mm, 150 mm, or 198.8 mm.

The sound-absorbing device according to claim 1, wherein the surface cloth is pressed against the perforated plate, and the surface density of the perforated plate and the surface cloth calculated together is 0.03-3.6 kg/m ² .

The sound-absorbing device according to claim 1, wherein the surface cloth is a canvas imitating hemp material, and the perforated plate is mainly made of metal material.

The sound-absorbing device as claimed in claim 1, further comprising a frame between the surface cloth and the rigid board, which is erected in the frame and provided for the perforated board.