JP2021060459A - 防音部材 - Google Patents
防音部材 Download PDFInfo
- Publication number
- JP2021060459A JP2021060459A JP2019183180A JP2019183180A JP2021060459A JP 2021060459 A JP2021060459 A JP 2021060459A JP 2019183180 A JP2019183180 A JP 2019183180A JP 2019183180 A JP2019183180 A JP 2019183180A JP 2021060459 A JP2021060459 A JP 2021060459A
- Authority
- JP
- Japan
- Prior art keywords
- porous body
- elastic porous
- body layer
- layer
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920001971 elastomer Polymers 0.000 claims description 5
- 239000000806 elastomer Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 43
- 238000003780 insertion Methods 0.000 description 16
- 230000037431 insertion Effects 0.000 description 16
- 229920005989 resin Polymers 0.000 description 13
- 239000011347 resin Substances 0.000 description 13
- 229920002725 thermoplastic elastomer Polymers 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 9
- 238000004088 simulation Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- 239000006260 foam Substances 0.000 description 7
- 238000009413 insulation Methods 0.000 description 7
- 239000011358 absorbing material Substances 0.000 description 6
- -1 wool Substances 0.000 description 6
- 229920002635 polyurethane Polymers 0.000 description 5
- 239000004814 polyurethane Substances 0.000 description 5
- 239000012784 inorganic fiber Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 229920005830 Polyurethane Foam Polymers 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 239000011496 polyurethane foam Substances 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- 230000005570 vertical transmission Effects 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 238000010206 sensitivity analysis Methods 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229920002397 thermoplastic olefin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Images
Classifications
-
- 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
- G10K11/162—Selection of materials
- G10K11/168—Plural layers of different materials, e.g. sandwiches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/04—4 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/42—Alternating layers, e.g. ABAB(C), AABBAABB(C)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
- B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/06—Open cell foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2274/00—Thermoplastic elastomer material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
- B32B2307/102—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/72—Density
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Textile Engineering (AREA)
- Laminated Bodies (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
【解決手段】防音部材は、音源(S)側から順に配置される、第一の弾性多孔質体層(10)と、第一のフィルム層(12)と、第二の弾性多孔質体層(20)と、第二のフィルム層(22)と、を含み、前記第一の弾性多孔質体層(10)及び前記第二の弾性多孔質体層(20)の各々は、厚さが0.5mm以上、10mm以下であり、嵩密度が45kg/m3以上、550kg/m3以下であり、ヤング率が7000Pa以上、28000Pa以下であり、前記第一の弾性多孔質体層(10)の粘性特性長Λ1(μm)に対する厚さL1(mm)の比(L1/Λ1)と、前記第二の弾性多孔質体層(20)の粘性特性長Λ2(μm)に対する厚さL2(mm)の比(L2/Λ2)との合計(L1/Λ1+L2/Λ2)が、0.11以上である。
【選択図】図1
Description
Claims (3)
- 音源側から順に配置される、
第一の弾性多孔質体層と、
第一のフィルム層と、
第二の弾性多孔質体層と、
第二のフィルム層と、
を含み、
前記第一の弾性多孔質体層及び前記第二の弾性多孔質体層の各々は、
厚さが0.5mm以上、10mm以下であり、
嵩密度が25kg/m3以上、2000kg/m3以下であり、
ヤング率が7000Pa以上、28000Pa以下であり、
前記第一の弾性多孔質体層の粘性特性長Λ1(μm)に対する厚さL1(mm)の比(L1/Λ1)と、前記第二の弾性多孔質体層の粘性特性長Λ2(μm)に対する厚さL2(mm)の比(L2/Λ2)との合計(L1/Λ1+L2/Λ2)が、0.11以上である、防音部材。 - 前記第一の弾性多孔質体層及び前記第二の弾性多孔質体層が、繊維体層である、
請求項1に記載の防音部材。 - 前記第一のフィルム層及び前記第二のフィルム層が、エラストマーフィルム層である、
請求項1又は2に記載の防音部材。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019183180A JP7473315B2 (ja) | 2019-10-03 | 2019-10-03 | 防音部材 |
PCT/JP2020/027062 WO2021065145A1 (ja) | 2019-10-03 | 2020-07-10 | 防音部材 |
EP20872103.5A EP4040432A4 (en) | 2019-10-03 | 2020-07-10 | SOUNDPROOFING ELEMENT |
US17/762,166 US12087262B2 (en) | 2019-10-03 | 2020-07-10 | Soundproof member |
CN202080069620.4A CN114502366A (zh) | 2019-10-03 | 2020-07-10 | 隔音部件 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019183180A JP7473315B2 (ja) | 2019-10-03 | 2019-10-03 | 防音部材 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2021060459A true JP2021060459A (ja) | 2021-04-15 |
JP7473315B2 JP7473315B2 (ja) | 2024-04-23 |
Family
ID=75338040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2019183180A Active JP7473315B2 (ja) | 2019-10-03 | 2019-10-03 | 防音部材 |
Country Status (5)
Country | Link |
---|---|
US (1) | US12087262B2 (ja) |
EP (1) | EP4040432A4 (ja) |
JP (1) | JP7473315B2 (ja) |
CN (1) | CN114502366A (ja) |
WO (1) | WO2021065145A1 (ja) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017167251A (ja) * | 2016-03-15 | 2017-09-21 | ニチアス株式会社 | 防音カバー |
WO2017208930A1 (ja) * | 2016-06-02 | 2017-12-07 | ニチアス株式会社 | 防音材 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69232053T2 (de) * | 1991-04-15 | 2002-06-06 | Matsushita Electric Works, Ltd. | Schallabsorbierendes Material |
FR2888386B1 (fr) * | 2005-07-07 | 2007-09-07 | Faurecia Automotive Ind Snc | Ensemble a mousse de tortuosite elevee, et application de celle-ci a l'insonorisation d'espaces clos |
JP4182111B2 (ja) | 2006-01-25 | 2008-11-19 | 豊和繊維工業株式会社 | 繊維集合体の音響特性予測方法 |
JP2008191506A (ja) | 2007-02-06 | 2008-08-21 | Swcc Showa Device Technology Co Ltd | 吸音体 |
ES2431139T3 (es) | 2007-12-10 | 2013-11-25 | Siniat S.A. | Procedimiento para realizar un panel insonorizante |
EP2394005B1 (en) * | 2009-02-03 | 2017-10-11 | Robert N. Clausi | Sound attenuating laminate materials |
US8796164B2 (en) * | 2010-12-28 | 2014-08-05 | Cytec Technology Corp. | Multilayer and composition gradient structures with improved damping properties |
US9093060B2 (en) | 2011-01-26 | 2015-07-28 | Nichias Corporation | Sound-proof material and process for production thereof, sound-proof molding, and sound insulation method |
JP5174980B1 (ja) | 2012-06-12 | 2013-04-03 | ニチアス株式会社 | 自動車用防音カバーおよび自動車用防音カバーの製造方法 |
JP2015523252A (ja) * | 2012-07-13 | 2015-08-13 | ザ プロクター アンド ギャンブルカンパニー | 吸収性物品用伸縮性積層体及びその製造方法 |
JP6484408B2 (ja) * | 2014-06-24 | 2019-03-13 | ニチアス株式会社 | 防音材、及び防音カバーの製造方法 |
US10062371B2 (en) * | 2016-11-21 | 2018-08-28 | Milliken & Company | Nonwoven composite |
US10294596B2 (en) * | 2016-11-21 | 2019-05-21 | Milliken & Company | Process for forming a nonwoven composite |
-
2019
- 2019-10-03 JP JP2019183180A patent/JP7473315B2/ja active Active
-
2020
- 2020-07-10 EP EP20872103.5A patent/EP4040432A4/en active Pending
- 2020-07-10 CN CN202080069620.4A patent/CN114502366A/zh active Pending
- 2020-07-10 US US17/762,166 patent/US12087262B2/en active Active
- 2020-07-10 WO PCT/JP2020/027062 patent/WO2021065145A1/ja unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017167251A (ja) * | 2016-03-15 | 2017-09-21 | ニチアス株式会社 | 防音カバー |
WO2017208930A1 (ja) * | 2016-06-02 | 2017-12-07 | ニチアス株式会社 | 防音材 |
Non-Patent Citations (1)
Title |
---|
三木達郎: "「技術レポート」繊維系多孔質吸音材料のBiotパラメータの推定", ニチアス技術時報 2018年 1号 NO.380[オンライン], JPN6020036319, 1 January 2018 (2018-01-01), pages 18 - 23, ISSN: 0005157912 * |
Also Published As
Publication number | Publication date |
---|---|
JP7473315B2 (ja) | 2024-04-23 |
US20220383845A1 (en) | 2022-12-01 |
WO2021065145A1 (ja) | 2021-04-08 |
US12087262B2 (en) | 2024-09-10 |
EP4040432A4 (en) | 2023-10-11 |
CN114502366A (zh) | 2022-05-13 |
EP4040432A1 (en) | 2022-08-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Seddeq et al. | Investigation on sound absorption properties for recycled fibrous materials | |
US9369805B2 (en) | Acoustic absorber, acoustic transducer, and method for producing an acoustic absorber or an acoustic transducer | |
JP5245641B2 (ja) | 吸音構造体 | |
KR101898747B1 (ko) | 방음재 및 그 제조 방법과, 방음 성형체 및 방음 방법 | |
Santhanam et al. | Recycling of cotton and polyester fibers to produce nonwoven fabric for functional sound absorption material | |
JP2014531356A (ja) | 自動車車体用防音アセンブリ | |
ATE533887T1 (de) | Hinterschäumtes teppichformteil für kraftfahrzeuge und verfahren zu dessen herstellung | |
TW201404985A (zh) | 聲波阻尼裝置及設備 | |
CN105989829A (zh) | 一种多层膜片式复合共振吸声模块 | |
Patnaik | Materials used for acoustic textiles | |
WO2021065145A1 (ja) | 防音部材 | |
RU2007143007A (ru) | Шумоизоляционная обивка кузова автомобиля | |
Shen et al. | Effects of different parameters on acoustic properties of activated carbon fiber felts | |
JP2004525714A5 (ja) | ||
JP2009249904A (ja) | 遮音構造体 | |
JP5286949B2 (ja) | 吸音構造 | |
Yilmaz | Acoustic properties of biodegradable nonwovens | |
JP2008203542A (ja) | 吸音体 | |
JPH0387461A (ja) | 防音床材 | |
JP7033055B2 (ja) | 防音構造体、及び防音パネル | |
KR20180131785A (ko) | 공동주택의 층간 소음을 완화시키기 위한 층간소음 방지 구조물 | |
JP2010014888A (ja) | 吸音構造体 | |
JP5950381B2 (ja) | 床材 | |
Ang et al. | Low‐Frequency Noise Reduction by Earmuffs with Flax Fibre‐Reinforced Polypropylene Ear Cups | |
JP3212946U (ja) | 防音床材 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20220812 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20230926 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20231025 |
|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20231226 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20240229 |
|
A911 | Transfer to examiner for re-examination before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20240311 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20240326 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20240411 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 7473315 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |