JP2001065077A - Sound absorbing panel - Google Patents

Sound absorbing panel

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Publication number
JP2001065077A
JP2001065077A JP24334299A JP24334299A JP2001065077A JP 2001065077 A JP2001065077 A JP 2001065077A JP 24334299 A JP24334299 A JP 24334299A JP 24334299 A JP24334299 A JP 24334299A JP 2001065077 A JP2001065077 A JP 2001065077A
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sound
absorbing
panel
plate
sound absorbing
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Japanese (ja)
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Noriaki Tanimizu
憲敬 谷水
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Noriaki Tanimizu
憲敬 谷水
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Abstract

PROBLEM TO BE SOLVED: To provide a perforated plate type sound absorbing panel low in cost with a high sound absorbing coefficient in a low frequency sound area of 100-500 Hz.
SOLUTION: This sound absorbing panel 1a is formed by forming a large number of sound absorbing holes 3 in a wood panel body 2 in the state of piercing the front and rear faces, and bonding a wood sound absorbing membrane plate 4 with a thickness of 0.2-3.0 mm to the surface of the panel body 2 to close the sound absorbing holes 3. The parts, covering the sound absorbing holes 3, of the sound absorbing membrane plate 4 are vibrated in-plate (membrane) by external sound energy to absorb sound. A sound absorbing coefficient in a low sound area is thereby heightened as the whole panel. A sound absorbing interior material of excellent appearance with the invisible sound absorbing holes can be obtained since the surface of the perforated panel body 2 is formed of the wood sound absorbing membrane plate 4 to close the sound absorbing holes 3.
COPYRIGHT: (C)2001,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、建造物の壁板や天井板として用いられる吸音内装材の吸音パネルに関する。 The present invention relates to relates to sound-absorbing panels of the absorbing interior material which is used as a wall plate or ceiling plate of a building.

【0002】 [0002]

【従来の技術】室内や室外の騒音的な音を積極的に吸音する吸音パネルとして、合板や不燃材の矩形のパネル本体に多数の吸音孔をパネル表裏面に貫通させて形成した有孔板タイプのものが多用されている。 BACKGROUND OF THE INVENTION Indoor and outdoor noise sounds as actively absorbing to acoustical panels, perforated plate which is formed by penetrating the plurality of sound-absorbing holes on the panel front and back surfaces of a rectangular panel body of plywood or nonflammable type of thing has been widely used. この有孔板タイプの吸音パネルは、パネル本体の材質や吸音孔の大きさ、数、配列パターンを選択設定することで、効果的に吸音できる音の周波数帯域が選定される。 The perforated plate type of sound-absorbing panel includes a panel body of material and the sound-absorbing holes sizes, number, by selecting sets the array pattern, the frequency band of effectively absorbing possible sound is selected. また、有孔板タイプの吸音パネルは、そのパネル本体の単体が壁板や天井板として使用されるか、パネル本体の裏面にグラスウールやロックウール等の吸音材を配置して使用される。 Also, the sound-absorbing panel of the open-hole type, single of the panel body either used as a wall plate or ceiling plate, is used on the rear surface of the panel body by placing the sound absorbing material such as glass wool and rock wool. パネル本体の裏面に吸音材を配置した吸音パネルは、パネル本体の吸音孔に外部から入射した音エネルギーが吸音材に熱エネルギーとして消費されて吸音率が高くなる。 Absorbing panel arranged a sound-absorbing material on the rear surface of the panel body, the sound absorption coefficient increases sound energy entering from the outside to the sound-absorbing holes in the panel body is consumed as heat energy to the sound absorbing material.

【0003】かかる有孔板タイプの吸音パネルは、構造簡単で材料費が安く、量産が容易であることから安価な吸音内装材として、また、吸音率が特に周波数が500 [0003] Such open-hole type of sound-absorbing panels, simple material cost cheaper construction, as an inexpensive sound-absorbing interior material since mass production is easy, also the sound absorption rate is particularly frequency 500
Hzを超える中高音域に対して優れることから、体育館や音楽室の壁板や天井板の吸音内装材に賞用されている。 Hz because it is excellent with respect to mid-high range of more than are Shoyo sound absorbing interior material of the wall plate or ceiling plate of gymnasiums and music room.

【0004】 [0004]

【発明が解決しようとする課題】ところで、有孔板タイプの吸音パネルは中高音域の音に対して吸音率に優れるが、周波数が500Hzより低い低音域の音に対しては、その吸音率が高音域の吸音率に比べて一段と低く、 BRIEF SUMMARY is the way, although the sound-absorbing panel of the perforated plate type is excellent in sound absorption coefficient with respect to the sound of mid-high range, with respect to the sound of low bass than the frequency is 500 Hz, the sound absorption coefficient but more lower than that of the sound absorption coefficient of the high-frequency range,
特に100Hzから250Hz程度の低音域の吸音率が低くて、この低音域での吸音効果があまり期待できない。 Especially low bass sound absorption coefficient of about 250Hz from 100Hz, can not be expected so much sound-absorbing effect of this bass. 例えば、高速道路周辺における自動車騒音は100 For example, automobile noise in the vicinity of highway 100
〜5000Hzと広範囲の音域で発生するが、その内の低音域の騒音に対する吸音効果が悪くて、低周波音域の騒音公害等に対する有孔板タイプの安価な吸音パネルの開発が要望されている。 It generated in ~5000Hz and broad range, but poor sound absorbing effect for low frequencies of the noise of them, the development of inexpensive sound-absorbing panel of the open-hole type for noise pollution, etc. of the low frequency range is desired.

【0005】また、既存の吸音パネルは体育館や音楽室等のような高音域の音が積極的に発生する場所において有効であるが、養護ホームや公共施設のロビー、一般家庭の書斎等のような高音域の音(騒音)があまり発生しない場所には必ずしも有効でない。 [0005] In addition, although the existing sound-absorbing panel is effective in places where high-frequency sound, such as gymnasiums and music room is generated actively, nursing homes and public facilities in the lobby, as of study, such as household high-frequency sound (noise) is not always effective in the location that is not a rare occurrence such. つまり、養護ホーム等の高音域の音の積極的な発生が少ない場所においては、高音域の音より自動車騒音、家電製品、人の話し声等の低音域の音のほうが気になるものであり、このような場所には高音域で吸音率の高い吸音パネルよりも、低音域の吸音率が高くて低音域から高音域の全音域に平均的な吸音率を有する吸音パネルが適当である場合が多い。 In other words, in the aggressive generate less location of the high-frequency range of the sound of the nursing home, etc., automobile noise than the high-frequency sound of, home appliances, is more of the low frequency range of sound, such as speaking voice of the people is intended to be worried about, than this place is highly absorbing panel sound absorption rate in the high range, if the sound-absorbing panel having an average sound absorption rate high bass sound absorption coefficients from the low range to the high range all registers of suitable many. しかし、低音域から高音域の全音域に平均的な吸音率を有する安価な有孔板タイプの吸音パネルの開発が難しくて、高音域の音の発生の少ない場所に必ずしも適当でない吸音パネルを使用しているのが現状である。 However, it is difficult to develop inexpensive perforated plate type of sound-absorbing panel having an average sound absorption coefficients from low range to high range all registers of, using the sound-absorbing panel is not necessarily appropriate to place with little occurrence of treble sound is it doing at present.

【0006】また、有孔板タイプの吸音パネルの低音域における吸音率を高める目的で、低音域の吸音率に優れる不織布等の肉厚の吸音部材を吸音パネルのパネル本体に重合させたり、パネル本体の吸音孔に充填したりしているが、これではパネル全体が複雑化し、大型化してコスト高となる不具合が発生し、現実的でない。 Further, for the purpose of increasing the sound absorption coefficient in a low frequency range of the perforated plate type of sound-absorbing panel, or by polymerizing the thickness of the sound absorbing member such as a nonwoven fabric which is excellent in sound absorption coefficient of low frequencies the panel body of the acoustical panel, the panel Although or filled into sound absorption hole of the body, this complicates the whole panel, in size occurs problem that the cost is not realistic.

【0007】本発明の目的とするところは、低音域で高い吸音率を有する有孔板タイプの安価な吸音パネルを提供することにある。 [0007] It is an object of the present invention is to provide an inexpensive sound-absorbing panels of perforated plate type having a high sound absorption coefficient in a low frequency range.

【0008】 [0008]

【課題を解決するための手段】本発明の上記目的を達成する技術的手段は、表裏面を貫通する吸音孔を所定の配列で複数有するパネル本体と、このパネル本体の表面に一体に接着されて複数の吸音孔のパネル表面側開口を塞ぎ、この吸音孔を塞ぐ部分で外部からの音エネルギーで板振動して吸音する厚さ0.2〜3.0mmの木質系吸音膜板を有する構造を特徴とする。 Means for Solving the Problems] technical means to achieve the object of the present invention, a plurality have the panel body in a predetermined array sound absorbing holes through the front and back surfaces are bonded together on the surface of the panel body structure Te block the panel surface side opening of the plurality of sound-absorbing holes has a wood-based sound absorbing film sheet having a thickness of 0.2~3.0mm for sound absorption in a plate vibrating in sound energy from outside at the portion for closing the sound-absorbing hole the features.

【0009】ここで、パネル本体は木質単板ボード、合板ボード、不燃ボード等であり、このパネル本体の表面に接着される木質系吸音膜板は生の木をシート状に薄く切削したものが望ましい。 [0009] Here, the panel body wood veneer boards, plywood boards, a noncombustible board or the like, wood-based sound absorbing membrane plate which is adhered to the surface of the panel body is obtained by thinly cutting the raw wood into a sheet desirable. この木質系吸音膜板は厚さ0.2〜3.0mmの木質シートで、これをパネル本体の表面に接着すると、吸音孔の表面側開口が吸音膜板で密閉されて、吸音膜板の吸音孔を塞ぐ部分が吸音孔の空間を利用して外部からの音エネルギーで板振動(膜振動)し、この板振動で低音域の音エネルギーの一部が吸収(吸音)される。 In wood sheet of wood-based sound-absorbing diaphragm has a thickness 0.2 to 3.0 mm, the bonding it to the surface of the panel body, the top-side opening of the sound absorption holes are sealed with the sound absorbing membrane plate, of the sound absorbing membrane plate partial closing the sound absorption holes panel vibration in sound energy from the outside by utilizing the space of the sound absorbing hole is (membrane vibration), part of the low range audio sound energy in this plate vibrations are absorbed (sound absorption). このような低音域の吸音率は、木質系吸音膜板の厚さが0.2mm以上で3.0mm以下の範囲において良好なものとなる。 The sound absorption coefficient of such a bass, the thickness of the wood-based sound absorbing film plate becomes excellent in 3.0mm below the range at 0.2mm or more. また、パネル本体表面の全面に木質系吸音膜板を接着することで、吸音パネルの表面全体が木質系吸音膜板で形成されて、パネル表面が吸音孔等の孔の無い外観の良好なものとなる。 Further, by the entire surface of the panel surface to bond the wood acoustical diaphragm, the entire surface of the acoustical panels are formed by wood-absorbing film plates, that the panel surface is good appearance without holes such as sound absorption holes to become.

【0010】上記木質系吸音膜板は、1枚の木質系単板に限らず、厚さが3mm近くまで大きくなる場合においては複数の木質系薄板(単板)を積層一体化した合板構造のものでも適用が可能であり、この合板使用が請求項2の本発明に相当する。 [0010] the wooden sound-absorbing diaphragm is of a single wooden not limited to a single plate, a plurality in the case where the thickness increases to near 3mm wooden sheet (veneer) of laminated integral plywood structure be those applied are possible, the plywood used corresponds to the present invention of claim 2.

【0011】また、本発明の請求項3の発明は、上記木質系吸音膜板の裏面に吸音膜板の板振動を妨げない補強紙を接着し、この補強紙を介して吸音膜板をパネル本体の表面に接着したことを特徴とする。 [0011] The invention of claim 3 of the present invention, by bonding a reinforcing sheet on the back surface of the wood-based sound-absorbing film plate does not interfere with the panel vibration of the sound absorbing membrane plate, panel sound absorbing film plate through the reinforcing sheet characterized in that attached to the surface of the body. このようにすることで、破れ易い木質系吸音膜板が補強紙で破れ難く補強されて、パネル本体に良好な状態で接着でき、吸音パネルの品質が安定する。 In this way, tear easily woody acoustical diaphragm is reinforced hardly broken by the reinforcing sheet, the panel body can be adhered in a good state, the quality of the sound-absorbing panel is stabilized.

【0012】本発明の請求項4の発明は、上記パネル本体の裏面に、パネル本体の複数の吸音孔からの音エネルギーを吸収して吸音する吸音材とこの吸音材を囲む箱形外囲材を固定したことを特徴とする。 [0012] The invention of claim 4 of the present invention, the rear surface of the panel body, by absorbing the sound energy from a plurality of sound-absorbing holes of the panel and the sound absorbing material to the sound absorbing a box outside 囲材 surrounding the sound absorption material characterized in that to fix the.

【0013】さらに、本発明の請求項4の発明は、裏面側から表面側に向けて未貫通で穿孔された有天の吸音孔を所定の配列で複数有する木質系のパネル本体を有し、 Furthermore, the invention of claim 4 of the present invention has a plurality having panel body woody at topped sound absorption holes predetermined sequence drilled with non-through toward the surface side from the back side,
このパネル本体のパネル表面側に未貫通で残された吸音孔の天板部が、外部からの音エネルギーで板振動して吸音する厚さ0.2〜3.0mmの木質系吸音膜板であることを特徴とする。 The top plate portion of the sound-absorbing holes left by the blind on the panel surface side of the panel body, in wood-based sound absorbing film sheet having a thickness of 0.2~3.0mm for sound absorption in a plate vibrating in sound energy from the outside characterized in that there.

【0014】 [0014]

【発明の実施の形態】以下、発明の実施形態例を図1〜 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, FIG. 1 to an exemplary embodiment of the invention
図7を参照して説明する。 It will be described with reference to FIG.

【0015】図1〜図3に示す第1の実施形態の吸音パネル1aは、パネル本体2に複数の吸音孔3を穿孔し、 The sound-absorbing panel 1a of the first embodiment shown in Figures 1-3, drilling a plurality of sound-absorbing holes 3 to the panel body 2,
パネル本体2の表面に所定厚さtの木質系吸音膜板4を接着固定したものである。 On the surface of the panel body 2 is obtained by bonding and fixing the wooden sound absorbing film plate 4 having a predetermined thickness t. パネル本体2は、従来の有孔板タイプのパネル本体と同様な木質系の単板、合板、或いは、不燃ボード等であり、このパネル本体2の表裏面を貫通させて吸音孔3が従来同様な大きさ、数、配列パターンで形成される。 Panel body 2 is a conventional perforated plate type of the panel and similar wood-based veneer, plywood, or a noncombustible board or the like, similar sound absorption holes 3 conventionally by penetrating the front and rear surfaces of the panel main body 2 such size, number, are formed in an array pattern. 本発明の特徴は、パネル本体2の表面に、この表面と同程度の面積を有するシート状で、 Feature of the present invention, the surface of the panel body 2, a sheet-like shape having an area comparable to the surface,
厚さが0.2〜3.0mmである木質系吸音膜板4を接着して、パネル本体2の表面の吸音孔3を塞ぎ、吸音孔3を目視から隠したことである。 Thickness by bonding a wood-based sound absorbing film plate 4 is 0.2 to 3.0 mm, block the sound absorption holes 3 of the surface of the panel 2 is to hide the sound absorbing hole 3 from visual inspection.

【0016】木質系吸音膜板4の材質は、シナ、タモマサ、サクラ、ナラ、カバ等の比較的もく目密で外観良好な木が望ましい。 [0016] The material of the wood-based sound absorbing layer plate 4, Sina, Tamomasa, cherry, oak, relatively heather eyes tight cover such good appearance wood is desirable. この木質系吸音膜板4の製作は、生の丸太を回転させて丸太の外周部分を所定の厚さtでシート状に連続して切削することで行われる。 The manufacture of wood-based sound absorbing layer plate 4 is performed by cutting continuously in a sheet-like raw log to rotate the outer peripheral portion of the log at a predetermined thickness t. また、シート状に切削された吸音膜板4の裏面に必要に応じて補強紙5を接着して、補強紙5を介して吸音膜板4をパネル本体2の表面に接着固定する。 Further, by bonding a reinforcing sheet 5 as needed to the rear surface of the sound absorbing membrane plate 4 which is cut into sheets, the adhesive for fixing the sound absorbing membrane plate 4 on the surface of the panel body 2 through the reinforcing sheet 5. 補強紙5は吸音膜板4より薄くて、吸音膜板4の後述する板振動を妨げないものが必要に応じて吸音膜板4に接着される。 Reinforcing sheet 5 is thinner than the sound absorbing membrane plate 4 is bonded to the sound absorbing film plate 4 as necessary which do not interfere with the plate vibrations to be described later of the sound absorbing membrane plate 4. 補強紙5を吸音膜板4に接着することで、単体の吸音膜板4が破れ難くなってパネル本体2への接着作業が容易になり、接着後の品質が良好に安定する。 By bonding the reinforcing sheet 5 on the backing film plate 4, the bonding operation of the panel body 2 not easily torn single acoustical diaphragm 4 is facilitated, the quality after adhesion is satisfactorily stable.

【0017】なお、吸音膜板4の材質、厚さtによっては補強紙5を接着せずに吸音膜板4の単板を直接にパネル本体2に接着することも可能である。 [0017] The material of the sound absorbing membrane plate 4, by the thickness t can be bonded veneer of the sound absorbing membrane plate 4 without adhered directly to the panel body 2 of the reinforcing sheet 5. また、吸音膜板4,補強紙5、パネル本体2の相互の接着は、ノンホルムアルデヒド系の天然素材100%の接着剤で行うようにして、吸音パネル1が壁や天井に施工される室内の生活環境を人体にとって安全なものにすることが望ましい。 Also, the sound absorbing membrane plate 4, the mutual adhesion of the reinforcing sheet 5, panel body 2 is to be performed with 100% natural materials of the adhesive non-formaldehyde-based, in the room where the sound-absorbing panel 1 is construction in the walls and ceilings it is desirable to safe living environment for the human body.

【0018】厚さtが0.2mm以上で3.0mm以下の木質系吸音膜板4をパネル本体2の表面に接着することで、複数の各吸音孔3のパネル表面側開口が吸音膜板4で密閉され、吸音膜板4の吸音孔3を塞ぐ部分4'が板厚方向に振動可能となる。 [0018] The thickness t that is glued to 3.0mm or less woody surface of the sound absorbing membrane plate 4 a panel body 2 with 0.2mm or more, the panel surface side opening of each of the plurality of sound-absorbing holes 3 acoustical diaphragm sealed with 4, part 4 which closes the sound absorption holes 3 of the sound absorbing membrane plate 4 'is capable of vibrating in the thickness direction. 実際、吸音膜板4の吸音孔3を塞ぐ部分4'に外部から音エネルギーが付与されると、付与された音エネルギーで吸音膜板4の孔閉塞部分4'が吸音孔3内の空気層を利用して板振動(膜振動) In fact, 'the sound energy from the outside is applied, pore closing part 4 of the sound absorbing membrane plate 4 in Granted sound energy' portion 4 to close the sound absorption holes 3 of the sound absorbing membrane plate 4 air layer of the sound-absorbing holes 3 using a plate vibration (membrane vibration)
し、この板振動で音エネルギーの一部が消費されて吸音される。 And it is partially consumed absorbing sound energy in this panel vibration. このような板振動型吸音は低音域の音エネルギーに対して効率良く行われ、また、吸音膜板4の厚さt Such plate-vibration type sound absorbing is performed efficiently the sound energy of the low frequency range, also the thickness t of the sound absorbing membrane plate 4
が0.2〜3.0mmの範囲内で効果的に行われ、殊に0.2〜0.5mmの範囲内で安定して確実に行われることが実験結果で分かっている。 There effectively made within a 0.2 to 3.0 mm, in particular in the range of 0.2~0.5mm stable in ensuring that has been found in experimental results. また、パネル本体2自体も外部からの音エネルギーで板振動して吸音し、さらに、パネル本体2の吸音孔3も音エネルギーを共鳴器型吸音方式で吸音する。 Further, the panel main body 2 itself and sound absorption in a plate vibrating in sound energy from the outside, further, the sound absorbing holes 3 of the panel 2 also absorbing the sound energy in the resonator type noise absorbing system. このような様々な方式による複合吸音効果でパネル本体2の表面に木質系吸音膜板4を接着した吸音パネル1aの吸音率は、低音域で高くなると共に、低音域から高音域の全音域であまり変動しない平均したものとなることが実験の結果分かった。 Sound absorption coefficient of these different schemes acoustical panels 1a adhered woody acoustical diaphragm 4 to the composite sound absorption effect of the panel 2 surface by, along with increases in the low frequency range, in all registers treble from low range it has been found the results of the experiment, which becomes the average so much does not change. この実験結果は、後述する実施例の各種実験データで説明する。 The results of this experiment are described in various experimental data of Examples to be described later.

【0019】また、パネル本体2の表面に木質系吸音膜板4を接着して、パネル本体2表面の吸引孔3を吸音膜板4で隠すことにより、吸音パネル1aの表面が孔の無い外観の良好な木質系吸音膜板4で形成されて、吸音内装材として使用される吸音パネル1aの外観を良好なものにする。 Further, by adhering to the surface of panel body 2 woody sound absorbing film plate 4, by hiding the suction holes 3 of the panel 2 surface acoustical diaphragm 4, no appearance surface of the sound absorbing panel 1a is a hole is formed in a good woody acoustical diaphragm 4, a to favorable appearance of the sound absorbing panel 1a which is used as sound absorbing interior materials. なお、木質系吸音膜板4の厚さtが0.2m The thickness t is 0.2m woody acoustical diaphragm 4
mより小さくなると、上記した板振動による低音域の吸音効果が低下すると共に、薄くなり過ぎて透けるために吸音パネル1aの表面から吸音孔3が透けて見えるようになって、外観上に好ましくなくなる。 Becomes smaller than m, with sound absorbing effect of the low frequency range by the plate vibration the drops, taken from the surface of the thin becomes too by sheer acoustical panel 1a in order to see through sound absorption holes 3, eliminates preferably on appearance . 逆に、厚さtが3mmを超えると板振動が良好に行われなくなって低音域の吸音効果が悪くなると共に、吸音パネル1aが吸音孔無しの単なる合板ボードとなってしまう。 Conversely, the sound absorbing effect of the low frequency range is worse panel vibration when the thickness t exceeds 3mm is no longer satisfactorily performed, the sound-absorbing panel 1a becomes a mere plywood board without sound absorbing holes. したがって、木質系吸音膜板4の厚さtは、0.2〜3.0mm Therefore, the thickness t of the wood-based sound absorbing layer plate 4, 0.2 to 3.0 mm
の範囲に、より望ましくは0.2〜0.5mmの範囲に規定するのが実用上に必要である。 In the range of, more desirably required to have practical to define a range of 0.2 to 0.5 mm. このような木質系吸音膜板の厚さ規定は、次の各実施形態例においても同様である。 The thickness provisions of such wood based acoustical diaphragm is the same in each of the following exemplary embodiments.

【0020】図4の第2の実施形態に示される吸音パネル1bは、パネル本体2の表面に合板構造の木質系吸音膜板4aを接着したものである。 The acoustical panel 1b shown in the second embodiment of FIG. 4 is obtained by bonding the wood-based acoustical diaphragm 4a plywood structure on the surface of the panel body 2. 合板構造の木質系吸音膜板4aは、例えば2枚の木質系膜板4b、4cを積層し接着して一体化したものであり、2枚の膜板4b、4 Woody acoustical diaphragm 4a plywood structure is obtained by integrating for example, two woody diaphragm 4b, 4c lamination adhered to the, two diaphragm 4b, 4
cの合計の板厚tが0.2〜3.0mmに、望ましくは0.2〜0.5mmに規制される。 Total thickness t of c is in the 0.2 to 3.0 mm, preferably is regulated to 0.2 to 0.5 mm. また、図5に示すように、1枚の木質系膜板4bの木目10と他の1枚の木質系膜板4cの木目11が直交するように2枚を積層するようにすれば、2枚が互いに補強し合って2枚を一体化した吸音膜板4aが破れ難いものとなる。 Further, as shown in FIG. 5, if as grain 11 of one of the wood-based film one and other grain 10 of plate 4b woody diaphragm 4c are stacked two orthogonally, 2 sheets reinforced each other by the sound absorbing membrane plate 4a formed by integrating two it becomes difficult torn from each other. したがって、この合板構造の木質系吸音膜板4aは補強紙等で補強することなく直接にパネル本体2に接着すればよい。 Therefore, wood-based sound absorbing membrane plate 4a of the plywood structure may be bonded directly to the panel body 2 without reinforced with reinforcing paper.
このような合板構造の木質系吸音膜板4aも、その板厚tを規制すれば外部から付勢される音エネルギーで板振動して、図1の吸音パネルと同様な吸音効果を発揮する。 Woody sound absorbing membrane plate 4a having such a plywood structures, and a plate vibrating at urged the sound energy from the outside when regulating the thickness t, it exhibits a similar sound absorbing effect and sound absorbing panel of FIG.

【0021】図6に示される第3の実施形態の吸音パネル1cは、図1或いは図2の吸音パネルのパネル本体2 The sound-absorbing panel 1c of the third embodiment shown in FIG. 6, FIG. 1 or the sound-absorbing panels of the panel 2 2
の裏面にグラスウール、ロックウール等の吸音材6と、 Glass wool on the back of a sound absorbing material 6, such as rock wool,
この吸音材6を囲んで収容する箱形の外囲材7を固定したものである。 Is obtained by fixing the outer 囲材 7 of the box-shaped accommodating surrounds the sound absorbing member 6. 外囲材7は発泡スチロールが適切である。 Outside 囲材 7 Styrofoam is appropriate. 吸音材6は、パネル本体2の吸音孔3からの音エネルギーが入射すると、その一部を熱エネルギーとして消費することで吸音(多孔質型吸音)する。 Sound absorbing member 6, the sound energy from the sound-absorbing holes 3 of the panel 2 is incident to the sound absorption (porous type sound absorption) by consuming a part of the thermal energy. この吸音材6 The sound-absorbing material 6
の吸音効果とパネル本体2側の吸音効果の相乗作用で、 In synergy sound absorbing effect of the sound absorbing effect and the panel main body 2 side,
低音域から高音域まで平均した吸音率が安定して得られる。 Averaged sound absorption coefficient from bass to treble is stably obtained.

【0022】図7に示される第4の実施形態の吸音パネル1dは、木質系パネル本体2の裏面から吸音孔3をパネル表面まで貫通させずに所定の深さで形成し、吸音孔3のパネル表面側に未貫通で残された天板部を音エネルギーで板振動する木質系吸音膜板4dとしている。 The sound-absorbing panel 1d of the fourth embodiment shown in FIG. 7, the back surface of the wood-based panel body 2 is formed at a predetermined depth without penetrating the sound absorbing hole 3 to the panel surface, sound absorption holes 3 the top plate portion left in the non-through surface of the panel side has a wood-based sound absorbing layer plate 4d for panel vibration in sound energy. この木質系吸音膜板4dの厚さtは0.2〜3.0mmである。 The thickness t of the wood-based acoustical diaphragm 4d is 0.2 to 3.0 mm. このように木質系パネル本体2に吸音孔3を穿孔するときに木質系吸音膜板4eを同時に形成することにより、別体のパネル本体と吸音膜板を別々に製作して接着する手間が省ける。 By thus forming the wood acoustical diaphragm 4e at the same time as drilling a sound absorption hole 3 in wood-based panel body 2, Habukeru the trouble of adhering to fabricate separate panel body and sound absorbing membrane plate separately .

【0023】 [0023]

【実施例】残響室に3種類の吸音パネルを設置して、種類毎に吸音パネルの吸音率と残響時間を測定した実験結果を説明する。 EXAMPLES installed three sound absorbing panels in a reverberation room, illustrating the experimental result of measuring the sound absorption coefficient of the sound absorbing panel and the reverberation time for each type. 図8に示すように残響室の床12の上に複数のレンガ13を設置し、レンガ13の上に複数枚の同一種類の吸音パネル14を配置して、吸音パネル14 And installing a plurality of bricks 13 on the floor 12 of the reverberation chamber as shown in FIG. 8, by arranging a plurality of the same kind of sound-absorbing panel 14 on top of the brick 13, the sound-absorbing panel 14
の吸音率を測定し、残響室の残響時間を測定する。 The sound absorption coefficient was measured, to measure the reverberation time of the reverberation room. 吸音パネル14に、図6と同様な吸音パネル1cを使用した場合を本発明品Cとし、図6のパネル本体2から吸音材6と外囲材7を残して吸音膜板4を省略した従来品相当の吸音パネルを使用した場合を防音板Bとし、図6のパネル本体2から吸音材6,外囲材7,吸音膜板4を省略した従来品相当の吸音パネルを有孔板Aとして、各吸音パネルの吸音率を測定した測定データを表1に示す。 The acoustical panel 14, a case of using the same sound-absorbing panels 1c and FIG. 6 and the present invention product C, conventionally is omitted absorbing film plate 4, leaving the sound absorbing member 6 and the outer 囲材 7 from the panel main body 2 in FIG. 6 the case of using the sound-absorbing panels of the article corresponding to the noise insulation plate B, the sound absorbing member 6 from the panel main body 2 in FIG. 6, the outer 囲材 7, the sound-absorbing panel of the conventional equivalent is omitted absorbing film plate 4 as perforated plate a shows the measurement data obtained by measuring the sound absorption coefficient of each sound-absorbing panels in Table 1.

【0024】 [0024]

【表1】 [Table 1]

【0025】この表1の測定データをグラフにしたものを図9に示すと、有孔板Aは高音域で吸音率が高く、中音域から低音域に至るほどに吸音率が下がり、また、吸音板Bは高音域から中音域にかけて吸音率が高いが、低音域に至ると吸音率が大きく低下する。 [0025] indicates a material obtained by the measurement data of Table 1 in graph in Figure 9, perforated plate A is the sound absorption coefficient is high at high frequency range, the sound absorption rate is lowered enough ranging from mid range to low range, also, Although the sound absorbing plate B has a high sound absorption coefficient over the midrange of treble, sound absorption rate is greatly reduced when reaching the low range. これに対して本発明品Cは低音域から高音域の全音域で吸音率が全体的に低いが均一化しており、殊に100〜200Hzの低音域の吸音率が有孔板Aや吸音板Bに比べて数倍程度も高いことが分かる。 The present invention product C contrast has but sound absorption rate lower overall uniform in all registers from bass treble, particular bass sound absorption coefficient of 100~200Hz is perforated plate A and the sound absorbing plate it can be seen high several times that of the B. したがって、本発明品Cは自動車騒音等の低音域の騒音が発生する場所において、今までにない適格な吸音パネルとして使用できる。 Accordingly, the present invention product C is at a location bass noise such as an automobile noise is generated, can be used as a qualified sound absorbing panels ever. なお、本発明品Cの全音域における均一的な吸音率分布の理論的説明は、現時点において不十分ゆえ省略する。 The theoretical explanation of the homogeneous sound-absorbing index distribution in the entire range of the present invention product C is omitted poor because at the present time.

【0026】次に、上記の各吸音パネルの残響時間を測定した測定データを表2に示し、そのグラフを図10に示す。 Next, the measurement data obtained by measuring the reverberation time of each sound-absorbing panels of the above are shown in Table 2, shows the graph in FIG. 10.

【0027】 [0027]

【表2】 [Table 2]

【0028】この表2における空室の残響時間は、残響室から吸音パネルを除いて空室にしたときの残響時間である。 The reverberation time of check in Table 2 is the reverberation time when the check except acoustical panel from the reverberation chamber. 図10から明らかなように、本発明品Cの場合の残響時間は低音域から高音域の全音域で平均化しており、殊に低音域で有孔板Aや吸音板Bの残響時間より短く、このことでもっても本発明品Cの吸音率が低音域で高いことが分かる。 As apparent from FIG. 10, the reverberation time in the case of the present invention product C is shorter than the reverberation time from the low frequency range are averaged in the high range all registers of, in particular bass in perforated plate A and the sound absorbing plate B , it can be seen sound absorption coefficient of the present invention product C even with this it is higher at low frequencies.

【0029】 [0029]

【発明の効果】本発明によれば、複数の吸音孔を有する有孔板のパネル本体の表面に吸音孔を塞ぐ状態で木質系吸音膜板を形成し、この木質系吸音膜板を外部からの音エネルギーで板振動させて吸音させることで、吸音パネル全体の吸音率が低音域の音に対して高くなるので、自動車騒音や雑踏騒音、話し声騒音等の低音域の低周波騒音に対して吸音効果に優れた有孔板タイプの安価な吸音パネルが提供できる。 According to the present invention, a wood-based sound absorbing film plate is formed in a state of closing the perforated plate surface acoustical hole of the panel body of which has a plurality of sound-absorbing holes, the wood-based acoustical diaphragm from outside of by plate vibration that is absorbing sound energy, since sound absorption coefficient of the entire sound-absorbing panel is increased relative to the low-frequency sounds, automotive noise and crowd noise, the low-frequency noise of low frequency range, such as speech noise inexpensive sound-absorbing panels of perforated plate type having excellent sound absorbing effect can be provided. また、吸音孔を有するパネル本体の表面を木質系吸音膜板で形成することで、吸音パネルの表面の吸音孔が吸音膜板で隠されて吸音パネルの見栄えが良くなり、吸音内装材として商品的付加価値の高いものが提供できる。 Further, by forming the surface of the panel body having a sound absorption hole in wood-absorbing film plate, the sound absorption holes in the surface of the sound absorbing panel is hidden by the sound absorbing membrane plate look better acoustical panel product as sound absorbing interior material having a high added value can be provided.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】第1の実施形態を示す吸音パネルの部分断面を含む側面図。 Figure 1 is a side view including a partial cross-section of the sound absorbing panel showing a first embodiment.

【図2】図1吸音パネルの部分拡大断面図。 Figure 2 is a partial enlarged sectional view of FIG acoustical panel.

【図3】図1吸音パネルの部分拡大平面図。 Figure 3 is a partial enlarged plan view of FIG acoustical panel.

【図4】第2の実施形態を示す吸音パネルの部分断面図。 Figure 4 is a partial cross-sectional view of a sound absorbing panel according to a second embodiment.

【図5】図4吸音パネルにおける木質系吸音膜板の部分斜視図。 [5] Woody acoustical diaphragm partial perspective view of the FIG sound-absorbing panel.

【図6】第3の実施形態を示す吸音パネルの部分断面を含む側面図。 Figure 6 is a side view including a partial cross section of a sound-absorbing panel according to a third embodiment.

【図7】第4の実施形態を示す吸音パネルの部分断面を含む側面図。 Figure 7 is a side view including a partial cross section of a sound-absorbing panel according to a fourth embodiment.

【図8】吸音率測定実験を説明するための吸音パネルの側面図。 Figure 8 is a side view of the sound absorbing panels for explaining the sound absorption rate measurement experiment.

【図9】本発明品と従来品の吸音率の実験データに基づくグラフ図。 [9] graph based on experimental data of the present invention product and the sound absorption coefficient of the conventional product.

【図10】本発明品と従来品の残響時間の実験データに基づくグラフ図。 [10] The present invention product and the graph based on experimental data of the reverberation time of the conventional product.

【符号の説明】 DESCRIPTION OF SYMBOLS

1a〜1d 吸音パネル 2 パネル本体 3 吸音孔 4 木質系吸音膜板 4a〜4d 木質系吸音膜板 5 補強紙 6 吸音材 7 外囲材 1a~1d absorbing panel 2 panel body 3 acoustical holes 4 woody acoustical diaphragm 4a~4d woody acoustical diaphragm 5 reinforcing sheet 6 sound-absorbing material 7 outside 囲材

Claims (5)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 表裏面を貫通する吸音孔を所定の配列で複数有するパネル本体と、 このパネル本体の表面に一体に接着されて複数の吸音孔のパネル表面側開口を塞ぎ、この吸音孔を塞ぐ部分で外部からの音エネルギーで板振動して吸音する厚さ0.2 A plurality having panel body at 1. A predetermined sequence acoustical holes through the back side table, closes the panel surface side opening of the plurality of sound-absorbing holes are glued together on the surface of the panel body, the sound absorption holes thickness of 0.2 to sound absorption by the plate vibration sound energy from outside at the portion for closing
    〜3.0mmの木質系吸音膜板と、 を有することを特徴とする吸音パネル。 Absorbing panel characterized by having a a wood-based sound absorbing membrane plate ~3.0Mm.
  2. 【請求項2】 木質系吸音膜板が、複数の木質系膜板を積層して一体化した合板であることを特徴とする請求項1記載の吸音パネル。 2. A woody sound absorbing film plate, acoustical panels according to claim 1, characterized in that the plywood and integrated by laminating a plurality of wood-based film plate.
  3. 【請求項3】 木質系吸音膜板の裏面に吸音膜板の板振動を妨げない補強紙を接着し、この補強紙を介して吸音膜板をパネル本体の表面に接着したことを特徴とする請求項1記載の吸音パネル。 Wherein the rear surface of the wood-based acoustical diaphragm does not interfere with the panel vibration of the sound absorbing membrane plate bonding the reinforcement sheet, characterized in that bonding the sound absorbing layer plate on the surface of the panel body via the reinforcing sheet claim 1 acoustical panel according.
  4. 【請求項4】 パネル本体の裏面に、パネル本体の複数の吸音孔からの音エネルギーを吸収して吸音する吸音材とこの吸音材を囲む箱形外囲材を固定したことを特徴とする請求項1記載の吸音パネル。 The back surface of 4. A panel body, by absorbing the sound energy from a plurality of sound-absorbing holes in the panel body according to sound absorbing material for sound absorption, characterized in that to fix the box-shaped outer 囲材 surrounding the sound absorption material absorbing panel of claim 1, wherein.
  5. 【請求項5】 裏面側から表面側に向けて未貫通で穿孔された有天の吸音孔を所定の配列で複数有する木質系のパネル本体を有し、このパネル本体のパネル表面側に未貫通で残された吸音孔の天板部が、外部からの音エネルギーで板振動して吸音する厚さ0.2〜3.0mmの木質系吸音膜板であることを特徴とする吸音パネル。 5. A having a plurality with panel body woody the topped sound absorption holes drilled in a predetermined arrangement in the non-through toward the back side surface side, the non-through on the panel surface side of the panel body in the top plate portion of the remaining sound absorption holes, sound absorbing panels, characterized in that in the plate oscillating with sound energy from the outside is a wood-based sound-absorbing film sheet having a thickness of 0.2~3.0mm for sound absorption.
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005320752A (en) * 2004-05-07 2005-11-17 Kaneka Corp Sound absorption member for floor
JP2008207763A (en) * 2007-02-28 2008-09-11 Sekisui Plastics Co Ltd Sound absorption material and its molding method
JP2010278590A (en) * 2009-05-27 2010-12-09 Victor Co Of Japan Ltd Speaker unit
US7942234B2 (en) 2006-08-29 2011-05-17 Nec Display Solutions, Ltd. Noise suppressor, electronic apparatus, and noise suppression characteristic control method
CN103069086A (en) * 2010-07-13 2013-04-24 贝尔马克斯声学有限公司 An acoustic panel
WO2014010551A1 (en) * 2012-07-12 2014-01-16 豊和繊維工業株式会社 Soundproofing body and insulator for automobile
KR200477460Y1 (en) * 2014-05-20 2015-06-10 에코사운드 주식회사 A sound absorption panel

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005320752A (en) * 2004-05-07 2005-11-17 Kaneka Corp Sound absorption member for floor
US7942234B2 (en) 2006-08-29 2011-05-17 Nec Display Solutions, Ltd. Noise suppressor, electronic apparatus, and noise suppression characteristic control method
US8127886B2 (en) 2006-08-29 2012-03-06 Nec Display Solutions, Ltd. Noise suppressor, electronic apparatus, and noise suppression characteristic control method
JP2008207763A (en) * 2007-02-28 2008-09-11 Sekisui Plastics Co Ltd Sound absorption material and its molding method
JP2010278590A (en) * 2009-05-27 2010-12-09 Victor Co Of Japan Ltd Speaker unit
CN103069086A (en) * 2010-07-13 2013-04-24 贝尔马克斯声学有限公司 An acoustic panel
CN103069086B (en) * 2010-07-13 2015-11-25 贝尔马克斯声学有限公司 Acoustic multilayer board
WO2014010551A1 (en) * 2012-07-12 2014-01-16 豊和繊維工業株式会社 Soundproofing body and insulator for automobile
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