WO2018074200A1 - Panneau absorbant les sons - Google Patents

Panneau absorbant les sons Download PDF

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Publication number
WO2018074200A1
WO2018074200A1 PCT/JP2017/035718 JP2017035718W WO2018074200A1 WO 2018074200 A1 WO2018074200 A1 WO 2018074200A1 JP 2017035718 W JP2017035718 W JP 2017035718W WO 2018074200 A1 WO2018074200 A1 WO 2018074200A1
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WO
WIPO (PCT)
Prior art keywords
sound
sound absorbing
front plate
back plate
resonance
Prior art date
Application number
PCT/JP2017/035718
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English (en)
Japanese (ja)
Inventor
伊知郎 山極
Original Assignee
株式会社神戸製鋼所
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Publication date
Application filed by 株式会社神戸製鋼所 filed Critical 株式会社神戸製鋼所
Publication of WO2018074200A1 publication Critical patent/WO2018074200A1/fr

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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects

Definitions

  • the present invention relates to a sound absorbing panel capable of absorbing sound.
  • a technique in which sound in a high frequency band is reduced by a sound absorbing material or sound insulating material, and sound in a low frequency band is reduced by a hollow resonance tube.
  • sound absorbing materials and resonance tubes are alternately arranged in a space between a front plate and a back plate.
  • An object of the present invention is to provide a sound absorbing panel capable of increasing the sound absorption area for sound in the low frequency band by increasing the sound absorbing area by resonance while exhibiting the sound absorbing effect or sound insulating effect for the sound in the high frequency band. That is.
  • the sound absorbing panel according to the present invention includes a front plate having sound permeability, a back plate facing the front plate through a space and having sound insulation, and an incident portion disposed on the front plate side of the space. And a sound absorbing / insulating chamber provided in the space so that at least a part thereof is separated from the back plate, and having a sound absorbing / insulating material having at least one of a sound absorbing property and a sound insulating property, and on the front plate side of the space An inlet portion that is arranged and extends from an inlet portion that is aligned with the incident portion in a plane along the front plate to a region sandwiched between the sound absorbing and insulating chamber and the back plate on the back plate side of the space. And a hollow resonance pipe.
  • the resonance conduit extends from the entrance portion arranged on the front plate side to a region sandwiched between the sound absorbing and insulating chamber and the back plate. That is, the resonance pipe line has a portion arranged in the same layer as the sound absorbing and insulating chamber, and a portion arranged closer to the back plate than the sound absorbing and insulating chamber.
  • the sound absorption area by resonance can be enlarged. Therefore, according to the present invention, the sound absorption area due to resonance is increased by configuring the resonance pipe as described above while exhibiting the sound absorption effect or the sound insulation effect for the high frequency band sound by providing the sound absorption and insulation chamber. Thus, it is possible to improve the sound absorption rate for low frequency band sounds.
  • the entire sound-absorbing / insulating chamber may be separated from the back plate, and the resonance conduit may be provided in the entire plane along the back plate on the back plate side of the space.
  • the sound absorption area due to resonance can be increased more reliably, and the sound absorption rate for sound in the low frequency band can be further improved.
  • the sound-absorbing panel according to the present invention is disposed at a front end of the back plate, the front surface plate and the back in the space.
  • a partition plate facing each of the face plates and partitioning the sound absorbing / insulating chamber and the resonance conduit may be provided. In this case, it is possible to easily form the sound absorbing and insulating chamber and the resonance conduit by using the protrusion provided on the back plate.
  • the sound absorbing panel according to the present invention includes a box having a bottom portion made of the partition plate and a side portion extending from a peripheral edge of the bottom portion toward the front plate, and in which the sound absorbing and insulating chamber is formed. It's okay. In this case, the sound absorbing and insulating material can be easily installed.
  • a sound absorbing material may be disposed inside the box as the sound absorbing and insulating material, and at least a part of the side of the box may have sound permeability and sound attenuation. In this case, by applying the sound absorbing structure also to the side portion of the box, it is possible to improve the sound absorption rate for a wide band of sounds in the low frequency band.
  • the protrusion includes a first protrusion in which a bottom portion of the box is disposed at a tip, and further protrudes toward the front plate than the first protrusion on the side of the first protrusion and protrudes toward the tip.
  • a second projecting portion on which a front plate is disposed, and a space on a side of the box body may be partitioned by the second projecting portion to form a plurality of the inlet portions.
  • the length of the resonance conduit can be increased, so that the sound absorption rate for sounds in a lower frequency band can be improved and the sound absorption target can be improved.
  • the sound absorbing panel can be downsized under the same frequency band.
  • At least a part of the front plate may further have sound attenuation.
  • the sound absorption rate for a wide band of sounds in the low frequency band can be improved as compared with the case where the front plate does not have sound attenuation.
  • a plurality of resonance pipes having different pipe lengths may be formed in a region sandwiched between the sound absorbing and insulating chamber and the back plate.
  • the resonance frequency is different for each resonance pipeline, and the sound absorption rate for sound in a wide frequency band (for example, a plurality of sound sources) can be improved.
  • the resonance conduit having a second conduit portion connected to an end and extending from the other end in a direction opposite to the one direction may be formed. In this case, since the length of the resonance conduit can be increased, it is possible to improve the sound absorption rate for sounds in a lower frequency band.
  • a plurality of the resonance pipes arranged in the thickness direction of the sound absorbing panel may be formed in a region sandwiched between the sound absorbing and insulating chamber and the back plate.
  • the resonance frequency is different for each resonance pipeline, and the sound absorption rate for sound in a wide frequency band (for example, a plurality of sound sources) can be improved.
  • the resonance conduit extends from the entrance portion arranged on the front plate side to a region sandwiched between the sound absorbing and insulating chamber and the back plate. That is, the resonance pipe line has a portion arranged in the same layer as the sound absorbing and insulating chamber, and a portion arranged closer to the back plate than the sound absorbing and insulating chamber.
  • the sound absorption area by resonance can be enlarged. Therefore, according to the present invention, the sound absorption area due to resonance is increased by configuring the resonance pipe as described above while exhibiting the sound absorption effect or the sound insulation effect for the high frequency band sound by providing the sound absorption and insulation chamber. Thus, it is possible to improve the sound absorption rate for low frequency band sounds.
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1 showing the sound absorbing panel according to the first embodiment of the present invention.
  • FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1 showing the sound absorbing panel according to the first embodiment of the present invention. It is sectional drawing corresponding to FIG. 3 which shows the sound absorption panel which concerns on 2nd Embodiment of this invention. It is a top view which shows the sound absorption panel which concerns on 3rd Embodiment of this invention.
  • FIG. 6 is a cross-sectional view taken along line VI-VI of FIG.
  • FIG. 5 showing a sound absorbing panel according to a third embodiment of the present invention.
  • FIG. 3 shows the sound absorption panel which concerns on 4th Embodiment of this invention.
  • FIG. 10 is a cross-sectional view taken along line XX of FIG. 9 showing a sound absorbing panel according to a fifth embodiment of the present invention.
  • FIG. 10 is a top view which shows the sound absorption panel which concerns on 6th Embodiment of this invention.
  • FIG. 6 shows the sound absorption panel which concerns on 8th Embodiment of this invention.
  • FIG. 6 shows the sound absorption panel which concerns on 8th Embodiment of this invention.
  • FIG. 6 shows the sound absorption panel which concerns on 8th Embodiment of this invention.
  • FIG. 6 shows the sound absorption panel which concerns on 8th Embodiment of this invention.
  • the sound-absorbing panel 100 reduces, for example, noise on roads, railways, etc. and noise around equipment (engine, compressor, pump, motor, etc.). Therefore, it is used alone or in a combination of a plurality of boxes (such as a hexahedron having the sound absorbing panel 100 disposed on each surface).
  • the sound absorbing panel 100 includes a front plate 1, a back plate 2 opposed to the front plate 1 through a space, a side plate 3 connecting the front plate 1 and the back plate 2 at their outer edges, a back plate 2 and a side. And four box bodies 4 arranged in a container constituted by the face plate 3.
  • the front plate 1 is formed with a large number of through-holes 1x, and has sound permeability (performance of passing sound) and sound attenuation (performance of sound attenuation).
  • the back plate 2 and the side plate 3 have sound insulation properties (performance for blocking sound).
  • the sound absorbing panel 100 is disposed so that the front plate 1 faces the sound source, and has a rectangular shape when viewed from the sound absorption direction (direction from the front plate 1 toward the back plate 2) A.
  • a plurality of ribs 2p projecting toward the front plate 1 are formed on the surface of the back plate 2 facing the front plate 1 (the upper surface in FIGS. 2 and 3).
  • Each rib 2p has a projecting length shorter than the side plate 3 and has a function of reinforcing the back plate 2 and a function of supporting the box 4.
  • One rib 2p extends in the longitudinal direction (left and right direction in FIG. 1) of the sound absorbing panel 100 at the center in the width direction (vertical direction in FIG. 1) of the sound absorbing panel 100 and is constant in the longitudinal direction of the sound absorbing panel 100.
  • Seven ribs 2p extend in the width direction of the sound absorbing panel 100 at intervals.
  • each box 4 is a container-like member having an open upper surface (a surface facing the front plate 1), and is directed from the bottom 4 a and the periphery of the bottom 4 a toward the front plate 1. Side portions 4b1 and 4b2 extending. Inside each box 4, a sound absorbing and insulating chamber 5 is formed. In a region sandwiched between the bottom 4a of each box 4 and the back plate 2, a hollow resonance pipe 6 is formed.
  • the bottom portion 4 a corresponds to a partition plate that faces the front plate 1 and the back plate 2 in the space between the front plate 1 and the back plate 2 and partitions the sound absorption / insulation chamber 5 and the resonance conduit 6.
  • a sound absorbing and insulating material (in this embodiment, a sound absorbing material 5x having a sound absorbing property) having at least one of sound absorbing properties (a property of absorbing sound) and sound insulating properties is disposed.
  • the sound absorbing material 5x may be a porous member made of glass wool, felt, urethane, metal fiber, or the like, for example.
  • the sound absorbing and insulating chamber 5 has an incident portion 5a disposed on the front plate 1 side of the space between the front plate 1 and the back plate 2, and the bottom portion 4a is disposed at the tip of the rib 2p, so that the whole A space between the front plate 1 and the back plate 2 is provided so as to be separated from the back plate 2.
  • the incident part 5 a corresponds to an opening on the upper surface of the box 4.
  • a pair of side portions 4 b 2 facing in the width direction of the sound absorbing panel 100 has a large number of through holes 4 x as shown in FIG. 3, and has sound permeability and sound attenuation.
  • the sound attenuation is imparted to the front plate 1 and the side portion 4b2 by appropriately setting the diameters of the through holes 1x and 4x and the opening ratios of the front plate 1 and the side portion 4b2.
  • the diameters of the through holes 1x and 4x are, for example, 0.3 to 3.0 mm.
  • the opening ratio of the front plate 1 and the side portion 4b2 is, for example, 10% or less.
  • the sound incident on the front plate 1 and the side portion 4b2 is attenuated when passing through the through holes 1x and 4x.
  • a vibration system is formed in which the air inside the through holes 1x and 4x is mass, and the air downstream of the through holes 1x and 4x is a spring in the sound incident direction with respect to the through holes 1x and 4x.
  • Resonance occurs when sound having the same frequency (resonance frequency) as the natural frequency of the vibration system is incident, and the kinetic energy of the air inside the through holes 1x and 4x is caused by friction between the air and the wall surfaces of the through holes 1x and 4x. Attenuates and exhibits a sound absorption effect.
  • the resonance duct 6 is provided in the entire surface along the back plate 2 on the back plate 2 side of the space between the front plate 1 and the back plate 2.
  • four resonance conduits 6 are provided for each box 4.
  • eight sets of two resonance conduits 6 arranged in the width direction of the sound absorbing panel 100 are arranged in the longitudinal direction of the sound absorbing panel 100, and a total of 16 resonance conduits 6 are provided.
  • eight resonance pipes 6 arranged in the longitudinal direction of the sound absorbing panel 100 each have a common inlet 6a.
  • the inlet portion 6 a extends in the longitudinal direction of the sound absorbing panel 100 at each of one end and the other end in the width direction of the sound absorbing panel 100.
  • the entrance portion 6 a is a portion arranged on the front plate 1 side of the space between the front plate 1 and the back plate 2, similarly to the incident portion 5 a.
  • the inlet portion 6a is aligned with the incident portion 5a in a plane along the front plate 1.
  • each resonance pipe 6 is sandwiched between the sound absorbing and insulating chamber 5 and the back plate 2 on the back plate 2 side of the space between the front plate 1 and the back plate 2 from the entrance 6 a. It extends to the region and has a shape bent at 90 ° when viewed from the side.
  • the eight resonance conduits 6 arranged in the longitudinal direction of the sound absorbing panel 100 on one end side in the width direction of the sound absorbing panel 100 (upper side in FIG. 1) are respectively disposed on one end side in the width direction of the sound absorbing panel 100.
  • the space between the front plate 1 and the back plate 2 extends from the entrance 6 a to the area sandwiched between the sound absorbing / insulating chamber 5 and the back plate 2 on the back plate 2 side.
  • the eight resonance conduits 6 arranged in the longitudinal direction of the sound absorbing panel 100 on the other end side in the width direction of the sound absorbing panel 100 (lower side in FIG. 1) are respectively disposed on the other end side in the width direction of the sound absorbing panel 100.
  • the space between the front plate 1 and the back plate 2 extends from the entrance 6 a to a region sandwiched between the sound absorbing and insulating chamber 5 and the back plate 2 on the back plate 2 side.
  • the desired sound absorbing effect can be obtained by arranging the incident portion 5a and the inlet portion 6a according to the position of the sound source.
  • the front plate 1, the back plate 2, the rib 2p, the side plate 3, and the box 4 may be made of any material (for example, a metal such as aluminum, iron, steel, or a resin). Further, the front plate 1, the back plate 2, the rib 2p, the side plate 3, and the box 4 may be made of the same material or different materials.
  • the front plate 1, the back plate 2, the rib 2p, the side plate 3, and the box 4 may be fixed to each other by any fixing means (for example, screws, adhesive, rivet bonding, welding, or ultrasonic pressure bonding).
  • the through holes 1x and 4x may be formed by arbitrary processing (punching processing, embossing, etc.).
  • the configuration of the plurality of through holes 1x in the front plate 1 may be the same for the entire front plate 1 or may be different for each region of the front plate 1.
  • the production of the front plate 1 is easy and productivity can be improved.
  • the structure of the front plate 1 is changed in a region facing the entrance portion 5a and the entrance portion 6a (the aperture ratio of the region facing the entrance portion 5a is set to 30% or more, and the entrance portion 6a is opposed). Therefore, the sound absorbing performance in each of the sound absorbing and insulating chamber 5 and the resonance conduit 6 can be optimized.
  • the resonance pipeline 6 extends from the inlet portion 6a disposed on the front plate 1 side to the region sandwiched between the sound absorbing and insulating chamber 5 and the back plate 2.
  • the resonance duct 6 has a portion disposed in the same layer as the sound absorbing and insulating chamber 5 and a portion disposed on the back plate 2 side with respect to the sound absorbing and insulating chamber 5.
  • the sound absorption area by resonance can be enlarged. That is, according to the present embodiment, the sound absorption area due to resonance can be obtained by configuring the resonance pipe 6 as described above while providing the sound absorption / insulation chamber 5 and exhibiting the sound absorption effect or the sound insulation effect for the high frequency band sound. Can be increased to improve the sound absorption rate for low frequency band sounds.
  • the inlet portion 6a is arranged on the front plate 1 side, the sound from the sound source can be directly guided to the resonance conduit 6. Furthermore, since the incident part 5a and the entrance part 6a are arranged in a plane along the front plate 1, the arrangement design with respect to the sound source is easy, and a desired sound absorption effect can be obtained.
  • the entire sound absorbing and insulating chamber 5 is separated from the back plate 2, and the resonance pipe 6 is provided in the entire plane along the back plate 2 on the back plate 2 side of the space between the front plate 1 and the back plate 2. It has been. In this case, the sound absorption area due to resonance can be increased more reliably, and the sound absorption rate for sound in the low frequency band can be further improved.
  • the sound absorbing panel 100 is disposed at a front end of the rib 2p and a rib 2p protruding from the surface of the back plate 2 facing the front plate 1 toward the front plate 1, and in the space between the front plate 1 and the back plate 2.
  • a partition plate (bottom portion 4 a) that opposes each of the front plate 1 and the back plate 2 and partitions the sound absorbing and insulating chamber 5 and the resonance duct 6 is provided.
  • the sound absorbing and insulating chamber 5 and the resonance conduit 6 can be easily formed by using the rib 2p provided on the back plate 2.
  • the sound absorbing panel 100 includes a box 4 in which a sound absorbing and insulating chamber 5 is formed. In this case, the sound absorbing and insulating material can be easily installed.
  • the sound absorbing material 5x is disposed as the sound absorbing and insulating material inside the box body 4, and the side portion 4b2 of the box body 4 has sound permeability and sound attenuation.
  • the sound absorbing structure also to the side portion 4b2 of the box body 4, it is possible to improve the sound absorption rate for a wide band of sounds in the low frequency band.
  • the front plate 1 has sound attenuation as well as sound transmission. In this case, as will be shown later in the examples, the sound absorption rate for a wide band of sounds in the low frequency band can be improved as compared with the case where the front plate 1 does not have sound attenuation.
  • the sound absorbing panel 100 (see FIG. 4) according to the second embodiment of the present invention is not the box 4 and the sound absorbing material 5x, in that the diameter of the through hole 1x is relatively large and the front plate 1 does not have sound attenuation.
  • the rest is the same as the first embodiment.
  • the space in which the sound insulating material 5y is disposed corresponds to the sound absorbing and insulating chamber 5, and the upper surface (the surface facing the front plate 1) of the sound insulating material 5y corresponds to the incident portion 5a.
  • the sound insulating material 5y may be, for example, a hollow or solid member (steel plate, concrete wall, veneer plate, etc.) made of concrete, metal, wood or the like.
  • the same effect as described above can be obtained by the same configuration as that of the first embodiment, and the sound insulating material 5y is disposed in the sound absorbing and insulating chamber 5 as the sound absorbing and insulating material.
  • the sound insulation performance can be improved by the double wall of the back plate 2.
  • the sound absorbing panel 100 (see FIGS. 5 and 6) according to the third embodiment of the present invention is different from the first embodiment in the configuration of the rib 2p, the box 4, the incident portion 5a, and the inlet portion 6a. This is the same as in the first embodiment.
  • one rib 2p extending in the longitudinal direction (left and right direction in FIG. 5) of the sound absorbing panel 100 at the center in the width direction (up and down direction in FIG. 5) of the sound absorbing panel 100 has a protruding length of the side plate. 3 and the front plate 1 is arranged at the tip instead of the box 4 (see FIG. 6). That is, the rib 2p has a function of reinforcing the back plate 2 and does not have a function of supporting the box 4.
  • the ribs 2p arranged at regular intervals in the longitudinal direction of the sound-absorbing panel 100 are respectively provided at the first protrusion 2p1 where the bottom 4a of the box 4 is arranged at the tip and the side of the first protrusion 2p1.
  • It includes a second protrusion 2p2 further protruding toward the front plate 1 than the first protrusion 2p1 and having the front plate 1 disposed at the tip.
  • the space of the side of the box 4 is divided by the 2nd protrusion part 2p2, and forms the some inlet part 6a (refer FIG. 5).
  • a set of four box bodies 4 arranged in the longitudinal direction of the sound absorbing panel 100 includes one end side (upper side in FIG. 5) and the other end side (in FIG. 5) of the sound absorbing panel 100.
  • a total of eight boxes 4 are provided respectively on the lower side.
  • the two box bodies 4 facing in the width direction of the sound absorbing panel 100 are separated from each other in the width direction of the sound absorbing panel 100 with a rib 2p disposed in the center in the width direction of the sound absorbing panel 100 interposed therebetween.
  • each box 4 has a large number of through-holes 4 x formed on only one side, not both of the pair of side portions 4 b 2, and has sound permeability and sound attenuation.
  • each incident portion 5 a is provided corresponding to the box 4.
  • An inlet portion 6 a is provided for each resonance pipe 6, and a total of 16 inlet portions 6 a are formed for each box 4.
  • These inlet portions 6a as a whole extend in the longitudinal direction of the sound absorbing panel 100 at the center in the width direction of the sound absorbing panel 100 and are partitioned by the second projecting portion 2p2.
  • the same effects as described above can be obtained by the same configuration as that of the first embodiment, and further the following effects can be obtained.
  • the rib 2p protrudes further toward the front plate 1 than the first protrusion 2p1 on the side of the first protrusion 2p1 where the bottom 4a of the box 4 is disposed at the end, and on the side of the first protrusion 2p1.
  • the space of the side of the box 4 is divided by the 2nd protrusion part 2p2, and the 2nd protrusion part 2p2 by which the front board 1 is arrange
  • the length of the resonance conduit 6 can be increased compared to the case where the space on the side of the box 4 is not partitioned, it is possible to improve the sound absorption rate for sounds in a lower frequency band,
  • the sound absorbing panel 100 can be reduced in size under the same frequency band as the sound absorption target.
  • the sound absorbing panel 100 (see FIGS. 7 and 8) according to the fourth embodiment of the present invention is different from the first embodiment in the configuration of the box 4 and the inlet portion 6a, and is otherwise the same as the first embodiment. .
  • each side portion 4b2 is provided with an extending portion 2p22 that is a part of the second protruding portion 2p2 according to the third embodiment.
  • the extending portion 2p22 extends from the outer surface of each side portion 4b2 in a direction orthogonal to the outer surface.
  • the space on the side of the box 4 is partitioned by the second projecting portions 2p2 to form a plurality of inlet portions 6a.
  • the rib 2p includes the first projecting portion 2p1 and the second projecting portion 2p2, the space on the side of the box 4 is partitioned by the second projecting portion 2p2, and the plurality of inlet portions 6a are defined. Forming. Therefore, the effect similar to the effect described in the third embodiment (that is, the sound absorption rate for the sound of the lower frequency band can be improved, and the sound absorbing panel 100 can be reduced in size under the same frequency band as the sound absorption target. Effect) can be obtained.
  • the sound absorbing panel 100 (see FIGS. 9 and 10) according to the fifth embodiment of the present invention has a difference in pipe length in the plurality of resonance pipes 6 due to the arrangement of the ribs 2p and the arrangement of the ribs 2p.
  • the second embodiment is the same as the first embodiment except for the first embodiment.
  • the single rib 2p extending in the longitudinal direction of the sound absorbing panel 100 is not the center in the width direction (up and down direction in FIG. 9) of the sound absorbing panel 100 but from the center.
  • the sound absorbing panel 100 is disposed on the other end side in the width direction (lower side in FIG. 9). Thereby, the pipe lengths of the two resonance pipes 6 arranged adjacent to each other in the width direction of the sound absorbing panel 100 are different from each other.
  • a plurality of resonance pipes 6 having different pipe lengths are formed in a region sandwiched between the sound absorbing and insulating chamber 5 and the back plate 2.
  • the resonance frequency is different for each resonance conduit 6, and the sound absorption rate for sound in a wide frequency band (for example, a plurality of sound sources) can be improved.
  • the sound absorbing panel 100 (see FIG. 11) according to the sixth embodiment of the present invention is different from the first embodiment in the configuration of the rib 2p, the box body 4, the incident portion 5a, the inlet portion 6a, and the resonance conduit 6; Is the same as in the first embodiment.
  • three ribs 2p are provided in the longitudinal direction of the sound absorbing panel 100 (left and right direction in FIG. 11), one at the center in the width direction (vertical direction in FIG. 11) of the sound absorbing panel 100 and two on both sides thereof. Each extends.
  • the rib 2p extending in the width direction of the sound absorbing panel 100 extends from the outer surface of the two ribs 2p other than the rib 2p provided at the center in the width direction of the sound absorbing panel 100 among the three ribs 2p.
  • the two boxes 4 are aligned in the longitudinal direction of the sound absorbing panel 100 and are separated from the side plate 3 respectively.
  • two incident portions 5 a are provided.
  • the inlet 6a is provided along the four sides of the front plate 1 so as to surround the two incident parts 5a.
  • the resonance line 6 is a resonance line 6 (for example, the resonance line 6x shown in FIG. 11) extending in the longitudinal direction of the sound absorption panel 100 in a region sandwiched between the sound absorption and insulation chamber 5 and the back plate 2.
  • There is a resonance pipe 6 (for example, the resonance pipe 6y shown in FIG. 11) extending in the width direction of the sound absorbing panel 100, and these pipe lengths are different from each other.
  • the same effects as described above can be obtained by the same configuration as that of the first embodiment, and further the following effects can be obtained.
  • a plurality of resonance pipes 6 having different pipe lengths are formed in a region sandwiched between the sound absorbing and insulating chamber 5 and the back plate 2 (resonance pipes 6x and 6y in FIG. 11). reference).
  • the resonance frequency is different for each resonance conduit 6, and the sound absorption rate for sound in a wide frequency band (for example, a plurality of sound sources) can be improved.
  • the sound absorbing panel 100 (see FIG. 12) according to the seventh embodiment of the present invention is different from the first embodiment in the configuration of the rib 2p, the box body 4, the incident portion 5a, the inlet portion 6a, and the resonance conduit 6; Is the same as in the first embodiment.
  • rib extending in the longitudinal direction of the sound absorbing panel 100 (left and right direction in FIG. 12), and a plurality of ribs extending in the width direction (up and down direction in FIG. 12) of the sound absorbing panel 100 are provided. It is arranged in a zigzag pattern along the longitudinal direction.
  • the sound absorbing panel is provided so that the two box bodies 4 avoid the inlet portion 6a provided at the center in the longitudinal direction of the sound absorbing panel 100 and on one side in the width direction of the sound absorbing panel 100 (upper side in FIG. 12). 100 are arranged side by side in the longitudinal direction.
  • two resonance conduits 6 sharing the inlet portion 6 a are arranged side by side in the longitudinal direction of the sound absorbing panel 100.
  • Each resonance duct 6 extends in one direction along the back plate 2 (downward in FIG. 12) from one end connected to the inlet 6a in a region sandwiched between the sound absorbing and insulating chamber 5 and the back plate 2.
  • a first pipe section 61 and a second pipe section 62 connected to the other end of the first pipe section 61 and extending from the other end in a direction opposite to the one direction (upward direction in FIG. 12).
  • the same effect as described above can be obtained by the same configuration as that of the first embodiment, and further the following effect can be obtained.
  • a first pipe portion 61 extending in one direction along the back plate 2 (downward in FIG. 12) from one end connected to the inlet 6a
  • the resonance conduit 6 having a second conduit portion 62 connected to the other end of the first conduit portion 61 and extending from the other end in a direction opposite to the one direction (upward direction in FIG. 12). Is formed.
  • the length of the resonance conduit 6 can be increased, the sound absorption rate for sounds in a lower frequency band can be improved.
  • the sound-absorbing panel 100 (see FIG. 13) according to the eighth embodiment of the present invention is different from the third embodiment in that the resonance pipe 6 has a two-layer structure by providing the partition plate 8, and otherwise. This is the same as in the third embodiment.
  • two resonant ducts 6 are formed that are arranged in the thickness direction of the sound absorbing panel 100 (the vertical direction in FIG. 13).
  • the resonance frequency is different for each resonance conduit 6, and the sound absorption rate for sound in a wide frequency band (for example, a plurality of sound sources) can be improved.
  • the inventor of this application measured the sound absorption rate for each of the sound absorbing panels according to the comparative example, the first example, and the second example of the present invention. The result is shown in FIG.
  • the sound absorbing material and the resonance tube are alternately arranged in the space between the front plate and the back plate, and the resonance duct is arranged in the same layer as the sound absorbing material.
  • the sound absorbing panel according to the first example has the same configuration as the sound absorbing panel 100 of the first embodiment (see FIG. 3) (that is, the diameter of the through hole 1x is relatively small (for example, about 0.5 to 1 mm),
  • the face plate 1 has a sound attenuating structure.
  • the sound absorbing panel according to the second example has a configuration in which the front plate 1 is replaced with that of the second embodiment in the sound absorbing panel 100 (see FIG. 3) of the first embodiment (that is, the diameter of the through hole 1x is relatively large). (Over 3 mm), the front plate 1 has no sound attenuation).
  • FIG. 14 shows that in the low frequency band (especially a band of 250 Hz or less), the first example and the second example have a higher sound absorption rate than the comparative example.
  • the first embodiment (the configuration in which the front plate has sound attenuation) is lower than the second embodiment (the configuration in which the front plate does not have sound attenuation) (especially a band of 250 Hz or less).
  • a high sound absorption coefficient can be obtained with respect to a wide band of sound.
  • the sound absorption coefficient is 0.5 or more in a band of 250 Hz or less in 5 bands of 80 to 200 Hz.
  • the first and second embodiments can obtain a higher sound absorption rate than the comparative example in the low frequency band (especially a band of 250 Hz or less), and can also generate high frequency sound (such as a fan as a sound source). It can be seen that a sound absorption coefficient equivalent to that of the comparative example is obtained.
  • the structure of the sound absorbing and insulating chamber and the resonance conduit may be changed as appropriate according to the arrangement of the sound source and the frequency characteristics.
  • -In the above-mentioned embodiment although setting the diameter of a through-hole and the aperture ratio of a board was illustrated in the above-mentioned embodiment as a means for providing sound attenuation property to a front board or the side part of a box, it is not limited to this.
  • a metal porous material metal fiber, metal sintered material, etc.
  • fiber material ceramic porous material, etc.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

La présente invention améliore le coefficient d'absorption sonore pour un son de bande basse fréquence en augmentant une zone qui absorbe le son par résonance tout en permettant à un effet d'adsorption sonore ou à un effet de blocage de son d'être présenté par rapport à un son de bande haute fréquence. Un panneau d'absorption sonore (100) comprend : une plaque avant (1) ; une plaque arrière (2) qui fait face à la plaque avant (1) avec un espace entre elles ; des plaques latérales (3) qui relient la plaque avant (1) et la plaque arrière (2) l'une à l'autre au niveau de leurs bords externes ; et un corps de boîte (4) qui est disposé à l'intérieur d'un récipient constitué par la plaque arrière (2) et les plaques latérales (3). Une chambre d'absorption/de blocage de son (5) est formée à l'intérieur du corps de boîte (4) et un matériau d'absorption sonore (5x) est disposé à l'intérieur de celle-ci. Une conduite de résonance (6) qui est creuse est formée dans une région interposée entre une partie inférieure (4a) du corps de boîte (4) et la plaque arrière (2). La conduite de résonance (6) s'étend à partir de parties d'entrée (6a) qui sont disposées du côté plaque avant (1) jusqu'à une région interposée entre la chambre d'absorption/de blocage de son (5) et la plaque arrière (2). Les parties d'entrée (6a) sont disposées à côté d'une partie d'incidence (5a) dans un plan le long de la plaque avant (1).
PCT/JP2017/035718 2016-10-17 2017-09-29 Panneau absorbant les sons WO2018074200A1 (fr)

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JP2016203326A JP2018066774A (ja) 2016-10-17 2016-10-17 吸音パネル
JP2016-203326 2016-10-17

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7373360B2 (ja) * 2019-10-31 2023-11-02 日本音響エンジニアリング株式会社 音響調整構造体

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06158751A (ja) * 1992-11-25 1994-06-07 Matsushita Electric Ind Co Ltd 音響吸音体
JPH0718759A (ja) * 1993-06-15 1995-01-20 Matsushita Electric Ind Co Ltd 吸音装置
US6021612A (en) * 1995-09-08 2000-02-08 C&D Technologies, Inc. Sound absorptive hollow core structural panel
US6435303B1 (en) * 2000-01-15 2002-08-20 Future Technologies Llc Sound absorbing structure
JP2008015111A (ja) * 2006-07-04 2008-01-24 Furukawa Sky Kk 固定吸音構造体の内部構造及び固定吸音構造体
JP2012179930A (ja) * 2011-02-28 2012-09-20 Yamaha Corp 吸音体
JP2016071220A (ja) * 2014-09-30 2016-05-09 ヤマハ株式会社 音響構造体

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06158751A (ja) * 1992-11-25 1994-06-07 Matsushita Electric Ind Co Ltd 音響吸音体
JPH0718759A (ja) * 1993-06-15 1995-01-20 Matsushita Electric Ind Co Ltd 吸音装置
US6021612A (en) * 1995-09-08 2000-02-08 C&D Technologies, Inc. Sound absorptive hollow core structural panel
US6435303B1 (en) * 2000-01-15 2002-08-20 Future Technologies Llc Sound absorbing structure
JP2008015111A (ja) * 2006-07-04 2008-01-24 Furukawa Sky Kk 固定吸音構造体の内部構造及び固定吸音構造体
JP2012179930A (ja) * 2011-02-28 2012-09-20 Yamaha Corp 吸音体
JP2016071220A (ja) * 2014-09-30 2016-05-09 ヤマハ株式会社 音響構造体

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