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Sound-absorbing structure body

A technology of structure and sound-absorbing materials, which is applied in the direction of sound-emitting devices, instruments, transportation and packaging, etc., and can solve the problem that it is difficult to provide two or more peak frequencies

Inactive Publication Date: 2006-03-29
KOBE STEEL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the above-mentioned traditional technology utilizes the principle of resonance type sound absorption, it is difficult to provide two or more peak frequencies with only one peak frequency.

Method used

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Experimental program
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Effect test

no. 1 approach

[0031] figure 1 (a) and 1(b) are diagrams showing a schematic structure of a sound absorbing structure according to the first embodiment of the present invention.

[0032] exist figure 1 In (a), the sound-absorbing structure 10 is basically composed of a layered structure, and the layered structure includes a concave-convex plate 11 with a large number of independent grooves 12 and a closing plate 15, and the closing plate and the concave-convex plate 11 connected to form a hollow 13 between adjacent grooves (the side opposite the sound source of the protrusion).

[0033] A partition plate 21 and a hole group 25 are provided in the layered structure, the partition plate 21 is used to divide the hollow portion 13 into two or more partition spaces 22, and the hole group 25 is formed in the concave-convex plate 11 The top is opened so that each of the two or more divided spaces 22 is connected.

[0034] Said relief plate 11 comprises a large number of conical (frusto-conical) ...

no. 2 approach

[0043] Below, refer to figure 2 A sound absorbing structure 100 according to a second embodiment of the present invention will be described.

[0044]The sound-absorbing structure 100 is basically composed of a layered structure including a concave-convex plate 111 and a closed plate 115, the concave-convex plate has optional protrusions 112 and grooves, and the closed plate is connected to the bottom of the groove. connected to form a hollow portion 113 inside each protrusion 112 . Separation plates 121, 131, 141, 142 are respectively assembled in the layered structure, and they respectively divide each hollow portion 113 into two or more division spaces, and two or more openings face the concave-convex plate 111. Hole groups 125a, 125b, 135a, 135b, 145a, 145b, 145c on the surface, said hole groups allow two or more partition spaces 122a, 122b, 132a, 132b, 143a, 143b, 143c to communicate.

[0045] exist figure 2 In the left protrusion 112 shown, the dividing plate 121 is ...

no. 3 approach

[0051] Next, a sound absorbing structure 200 according to a third embodiment of the present invention will be described.

[0052] In the sound absorbing structure 200, foil sheets 201a and 201b are respectively added in the divided spaces 22a for the sound absorbing structure of the first embodiment. Such as image 3 As shown in the middle left hollow part, the first porous foil 201a is loaded into the first divided space in parallel with respect to the closing plate 15, so that the first foil 201a vibrates or goes in and out of the first hole The air of group 25a rubs against each other. A second porous foil 201b is fitted into the second partitioned space in parallel with respect to the closing plate 15, so that the second foil 201b vibrates or rubs against the air passing in and out of the second set of holes 25b.

[0053] For each of the foils 201a and 201b, a pure foil, a foil with a convex-concave shape, a foil with a folded shape, or a foil with a plurality of through...

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PUM

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Abstract

A laminated structure body with a ridge-groove board (11) with a large number of ridges and grooves and with a closing board (15) joined to the ridge-groove board so as to close one side of the ridge-groove board to form a hollow portion (13). In the laminated structure body are provided a partition board (21) for partitioning the hollow portion (13) into two or more partitioned spaces (22a, 22b) and two or more hole groups (25a, 25b) opened in the ridge-groove board so as to be communicated with each of the partitioned spaces (22a, 22b) partitioned into two or more spaces. Thus a sound-insulating and -absorbing body is formed.

Description

technical field [0001] The invention relates to a sound-absorbing structure, which includes a concave-convex plate with a large number of protrusions and grooves, and a closing plate connected with the concave-convex plate to close one side of the concave-convex plate. Background technique [0002] Heretofore, it has been known to install a perforated plate on the lower surface side of the panel (through the air layer) as a sound-absorbing part of the vehicle, by adjusting the thickness of the perforated plate, the diameter and spacing of the holes and the thickness of the air layer to absorb noise in a predetermined frequency band. [0003] By adjusting the thickness of the perforated plate, the diameter and spacing of the holes, the thickness of the air layer and utilizing Helmholtz's resonance principle, the noise of a specific frequency band can be effectively absorbed. [0004] Since the above-mentioned conventional technology utilizes the principle of resonance type s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/16G10K11/172
CPCG10K11/172B60R13/08G10K11/16
Inventor 山口善三山极伊知郎田中俊光上田宏树
Owner KOBE STEEL LTD
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