JP6285061B1 - Resonator - Google Patents
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- JP6285061B1 JP6285061B1 JP2017028329A JP2017028329A JP6285061B1 JP 6285061 B1 JP6285061 B1 JP 6285061B1 JP 2017028329 A JP2017028329 A JP 2017028329A JP 2017028329 A JP2017028329 A JP 2017028329A JP 6285061 B1 JP6285061 B1 JP 6285061B1
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Abstract
【課題】音響機器及び楽器に用いられる、満足できる音質の改善を図ることができる支持体（共鳴体）を提供する。【解決手段】共鳴体１は、中央に孔３を設けてもよく、円柱形の共鳴体１の少なくとも一方の表面に外周側から中心に向かう複数の凹溝２を有する。孔３を設けない場合は、中心に向かう凹溝２は、互いに中心で交わらず、孔３を設けた場合は、凹溝２は孔３に連通しない。共鳴体１の素材は、フェノール樹脂系複合材または金属体を使用し、特にマイクロポーラス構造を有する多孔質充填材を配合したフェノール系樹脂が好ましい。【選択図】図１The present invention provides a support (resonator) that can be used for audio equipment and musical instruments and can achieve satisfactory improvement in sound quality. A resonator 1 may be provided with a hole 3 in the center, and has a plurality of concave grooves 2 from the outer peripheral side toward the center on at least one surface of a cylindrical resonator 1. When the hole 3 is not provided, the concave grooves 2 toward the center do not intersect with each other at the center, and when the hole 3 is provided, the concave groove 2 does not communicate with the hole 3. The material of the resonator 1 is preferably a phenol resin using a phenol resin composite material or a metal body, and in particular, a porous filler having a microporous structure. [Selection] Figure 1
Description
本発明は、本発明は音響機器及び楽器に用いられる共鳴体に関する。 The present invention relates to a resonator used in audio equipment and musical instruments.
音響機器や楽器は、載置する部材や人体からの跳ね返り振動を受け、音質の劣化を生じたり、本来求める設計どおりの音質から逸脱してしまうことが知られている。また、音響機器や楽器を設置する部材の材質や強度の違いによっても音色が損なわれてしまう。 It is known that acoustic devices and musical instruments are subjected to rebound vibration from a member to be placed or a human body, resulting in deterioration of sound quality or deviating from sound quality as originally designed. Moreover, a timbre is impaired also by the difference in the material and intensity | strength of the member which installs an audio equipment or a musical instrument.
一般に、音響機器やピアノ等には振動を減衰させる目的でインシュレータが使われているが、減衰によって音質が変化してしまう現象がみられることなどから、音響特性を改善できる良質の部材の開発が待たれていた。
公知の音響機器用インシュレータ（特許文献１）においては、一定の改善が認められるものの満足できる音質は得られておらず、さらなる改良が求められていた。
In general, insulators are used for the purpose of damping vibrations in acoustic equipment, pianos, etc., but due to the phenomenon that sound quality changes due to damping, the development of high-quality members that can improve acoustic characteristics has been developed. I was waiting.
In the known insulator for acoustic equipment (Patent Document 1), although a certain improvement is recognized, a satisfactory sound quality is not obtained, and further improvement has been demanded.
本発明は、上記課題を解決し、音響機器や楽器において満足できる音質の改善を図ることができる支持体（共鳴体）を提供することを課題とする。 This invention solves the said subject and makes it a subject to provide the support body (resonator) which can aim at the improvement of the sound quality which can be satisfied in an audio equipment or a musical instrument.
本発明は、音響機器や楽器から発生する振動周波数と共鳴させることで音圧を倍増させるとともに、音色を忠実に再現することを可能とする支持体（共鳴体）を提供するものである。具体的には、円柱形の共鳴体本体表面に複数の凹溝を形成した形状であることを主たる特徴とし、以下の技術を基礎とする。 The present invention provides a support (resonator) capable of doubling sound pressure by resonating with a vibration frequency generated from an acoustic device or a musical instrument and faithfully reproducing a timbre. Specifically, it is mainly characterized by a shape in which a plurality of grooves are formed on the surface of a cylindrical resonator body, and is based on the following technique.
（１）音響機器・楽器に使用する円柱形の共鳴体であって、中央に孔を設けてもよく、少なくとも１方の表面に外周側から中心に向かう複数の凹溝を有し、孔を設けない場合は、中心に向う凹溝は互いに中心で交わらず、孔を設けた場合は、すべての凹溝が孔に連通することがないことを特徴とする音響機器・楽器用共鳴体。 (1) A cylindrical resonator used for audio equipment and musical instruments, which may have a hole in the center, and has a plurality of grooves on the surface from the outer peripheral side to the center on at least one surface. When not provided, the groove toward the center does not intersect with each other at the center, and when the hole is provided, all the grooves do not communicate with the hole.
（２）上記凹溝が３〜８本であることを特徴とする（１）に記載の音響機器・楽器用共鳴体。 (2) The acoustic device / musical instrument resonance body according to (1), wherein the number of the concave grooves is 3 to 8.
（３）上記凹溝の長さが直径の３０〜４０％であることを特徴とする（１）または（２）の音響機器・楽器用共鳴体。 (3) The acoustic device / musical instrument resonance body according to (1) or (2), wherein the length of the concave groove is 30 to 40% of the diameter.
（４）上記凹溝が三角形、台形またはＵ字形からなる断面形状を有することを特徴とする（１）〜（３）の音響機器・楽器用共鳴体。 (4) The acoustic device / musical instrument resonance body according to any one of (1) to (3), wherein the groove has a cross-sectional shape including a triangle, a trapezoid, or a U-shape.
（５）上記凹溝により扇形が形成され、該扇形は、外周または外周近傍を頂点とし中心に向って傾斜していることを特徴とする（１）〜（４）の音響機器・楽器用共鳴体。 (5) The fan groove is formed by the concave groove, and the fan shape is inclined toward the center with the outer periphery or the vicinity of the outer periphery as a vertex, and the resonance for acoustic equipment and musical instruments according to (1) to (4) body.
（６）上記扇形と凹溝とで形成される外周端上部の角を加工し、角を取ったことを特徴とする（５）の音響機器・楽器用共鳴体。 (6) The acoustic device / musical instrument resonance body according to (5), wherein a corner of the upper end of the outer periphery formed by the fan shape and the groove is processed to form a corner.
（７）共鳴体が、フェノール樹脂系複合材または金属体からなることを特徴とする（１）〜（６）の音響機器・楽器用共鳴体。 (7) The resonance body for acoustic equipment / musical instruments according to (1) to (6), wherein the resonance body is made of a phenol resin composite material or a metal body.
本発明の共鳴体は、フェノール樹脂系複合材や金属材を本発明の形状に加工して用いることで、音響機器や楽器から発生する振動周波数と共鳴させ音圧を倍増させるとともに、音色を忠実に再現することを可能とし、音響機器や楽器に使用した時、設置する部材や人間の体からの跳ね返り振動を受けても忠実に再現することができるという効果を奏する。 The resonator of the present invention uses a phenolic resin composite or metal material processed into the shape of the present invention to resonate with a vibration frequency generated from an acoustic device or a musical instrument, double the sound pressure, and faithfully reproduce the timbre. When used in an audio device or musical instrument, it can be reproduced faithfully even if it is bounced back from a member to be installed or a human body.
本発明の共鳴体は、音響機器（アンプ、ＣＤプレーヤー、ＤＡＣ、ＢＤレコーダー、ＴＶ、クリーン電源、ＦＭ・ＡＭチューナー、グラフィックイコライザー、ＤＡＤ、レコードプレーヤー、ネットワークプレーヤー、カセットデッキ、ＤＡＴ等）および、楽器（ピアノ、バイオリン、ビオラ、チェロ、コントラバス等）を支持するための共鳴体として用いる。 The resonator of the present invention includes an acoustic device (amplifier, CD player, DAC, BD recorder, TV, clean power source, FM / AM tuner, graphic equalizer, DAD, record player, network player, cassette deck, DAT, etc.) and musical instrument. Used as a resonator for supporting (piano, violin, viola, cello, contrabass, etc.).
本発明の共鳴体は、直径１０ｍｍφから８０ｍｍφの円柱形で、厚み５ｍｍから２５ｍｍの素材に、その少なくとも１方の表面に外周側から中心に向かう複数の凹溝を形成する。凹溝の数は３〜８本とし、４つの凹溝を有するものが、跳ね返り振動の抑制の効果、製造の効率などの点から好適である。 The resonator of the present invention has a cylindrical shape with a diameter of 10 mmφ to 80 mmφ, and a plurality of concave grooves from the outer peripheral side to the center are formed on at least one surface of a material having a thickness of 5 mm to 25 mm. The number of the concave grooves is 3 to 8, and four concave grooves are preferable from the viewpoint of the effect of suppressing the bounce vibration and the manufacturing efficiency.
上記凹溝を設けた面を床などの載置部材や人体などと接するようにして使用する。
凹溝は、中央に孔を設けない場合は、互いに中心で交わらない形状とし、孔を設けた場合は、すべての凹溝が孔に連通することがない形状とする。
The surface provided with the concave groove is used so as to be in contact with a mounting member such as a floor or a human body.
Groove, the case without the hole in the center, a shape that does not intersect the center to each other, the case of providing the hole, all the grooves are shaped is not communicating with the hole.
上記凹溝は、長さが直径の３０〜４０％であり、その断面形状は、三角形、台形またはＵ字形から選ばれる形状とする。 The concave groove has a length of 30 to 40% of the diameter, and its cross-sectional shape is a shape selected from a triangle, a trapezoid, or a U-shape.
上記凹溝を設けることにより共鳴体表面には扇形が形成され、該扇形は外周または外周近傍を頂点とし中心に向って傾斜している。扇形の頂点は円の外周から内側に向かって０〜１０ｍｍに位置し（図２：Ａ参照）、中心からみて０．０５〜０．５ｍｍの高さの凸部を形成する（図２：Ｂ参照）。 By providing the concave groove, a fan shape is formed on the surface of the resonator, and the fan shape is inclined toward the center with the outer periphery or the vicinity of the outer periphery as a vertex. The vertices of the sector shape are located 0 to 10 mm inward from the outer periphery of the circle (see FIG. 2: A), and form a convex portion having a height of 0.05 to 0.5 mm when viewed from the center (FIG. 2: B). reference).
上記扇形外周端と凹溝とで形成される外周端上部の角を加工し、角を取る（図１：５）。
４本の凹溝を設けた場合、４つの扇形が形成され、８つの角を加工することになる。
The corner of the upper part of the outer peripheral end formed by the fan-shaped outer peripheral end and the concave groove is processed to take the corner (FIG. 1: 5).
When four concave grooves are provided, four sectors are formed and eight corners are processed.
素材としては、フェノール樹脂系複合材、あるいは、鉄・銅・真鍮・アルミ等の金属材を用いる。
フェノール樹脂系複合材として、特許第５６５４１５０号公報に記載の複合材を用いることができる。
As the material, a phenol resin composite material or a metal material such as iron, copper, brass, and aluminum is used.
As the phenol resin composite material, the composite material described in Japanese Patent No. 5654150 can be used.
フェノール樹脂系複合材は、熱硬化性樹脂と無機充填材等から成る樹脂組成物を成型したものであって、特に充填材の一部に多孔質充填材を使用し、成型材内部に連通した微細な気孔が無数に存在するものが好ましい。成型材の比重を１．５〜５．０、気孔率を２〜２０％、平均気孔径を０．１〜３．０μｍとしたものが好適である。材料の比重は、樹脂組成物に添加する充填材の種類を適宜選択することにより調整する。 A phenolic resin composite material is a molded resin composition composed of a thermosetting resin and an inorganic filler, and in particular, a porous filler is used as a part of the filler and communicated with the inside of the molding material. Those having innumerable fine pores are preferred. It is preferable that the molding material has a specific gravity of 1.5 to 5.0, a porosity of 2 to 20%, and an average pore diameter of 0.1 to 3.0 μm. The specific gravity of the material is adjusted by appropriately selecting the type of filler added to the resin composition.
上記多孔質充填材としては、平均細孔直径が２ｎｍ以下のマイクロポーラス構造を有する多孔質充填材、平均細孔直径が２ｎｍを超え５０ｎｍ未満のメソポーラス構造を有する多孔質充填材、平均細孔直径が５０ｎｍ以上のマクロポーラス構造を有する多孔質充填材を使用することができる。 Examples of the porous filler include a porous filler having a microporous structure with an average pore diameter of 2 nm or less, a porous filler having a mesoporous structure with an average pore diameter of more than 2 nm and less than 50 nm, and an average pore diameter. A porous filler having a macroporous structure with a thickness of 50 nm or more can be used.
この中でもマイクロポーラス構造を有する多孔質充填材は、使用することで多孔質充填材の添加量を抑えることができ、他の充填材の添加量の調整の自由度が増し、比重を調整しやすくなるので好ましい。 Among these, a porous filler having a microporous structure can be used to suppress the addition amount of the porous filler, increase the degree of freedom in adjusting the addition amount of other fillers, and easily adjust the specific gravity. This is preferable.
マイクロポーラスを有する多孔質充填材としては、ゼオライト、活性炭、ポーラスシリカ、ポーラスアルミナが挙げられ、これらのうち１種又は２種以上を選択して使用することができる。 Examples of the porous filler having microporous materials include zeolite, activated carbon, porous silica, and porous alumina, and one or more of these can be selected and used.
熱硬化性樹脂としては、ストレートフェノール樹脂や、フェノール樹脂をカシューオイルやシリコーンオイル、アクリルゴム等の各種エラストマーで変性した樹脂、フェノール類とアラルキルエーテル類とアルデヒド類とを反応させて得られるアラルキル変性フェノール樹脂、フェノール樹脂に各種エラストマー、フッ素ポリマー等を分散させた熱硬化性樹脂等が挙げられ、これらは１種を単独で又は２種以上を組み合わせて使用することができる。 Thermosetting resins include straight phenol resins, resins modified with various elastomers such as cashew oil, silicone oil, and acrylic rubber, and aralkyl modifications obtained by reacting phenols, aralkyl ethers, and aldehydes. Examples thereof include phenol resins, thermosetting resins in which various elastomers, fluoropolymers and the like are dispersed in phenol resins, and these can be used alone or in combination of two or more.
熱硬化性樹脂を樹脂組成物全量に対し５〜２５重量％、充填材の一部に多孔質充填材を樹脂組成物全量に対し１０〜３５重量％含有したものが好ましい。 It is preferable that the thermosetting resin is contained in an amount of 5 to 25% by weight based on the total amount of the resin composition, and a porous filler is contained in a part of the filler in an amount of 10 to 35% by weight based on the total amount of the resin composition.
以下、実施例及び比較例を示し、本発明を具体的に説明するが、本発明は下記の実施例に制限されるものではない。 EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example.
〔実施例１〜６、比較例１〜１２〕
［共鳴体の製造］
表１に示す素材を用い、実施例及び比較例の各形状の共鳴体を成型し、それぞれの音質について評価を試みた。フェノール樹脂系複合材の組成については表２に示した。
[Examples 1-6, Comparative Examples 1-12]
[Manufacture of resonators]
Using the materials shown in Table 1, the resonators of the respective shapes of the examples and comparative examples were molded, and an evaluation was made for each sound quality. The composition of the phenolic resin composite is shown in Table 2.
実施例１〜６（図１の形状）は、直径５０ｍｍφ、厚み２２ｍｍの円柱形で、表面に外周側から中心に向かう４本の断面が三角形の凹溝を有し、中心に孔が設けられているが、凹溝は孔に連通していない。また外周から５ｍｍの位置に頂点を有する４つの高さ０．１５ｍｍの凸状扇形が形成されており、扇形外周端と凹溝により形成された８つ角は、加工により角が取られている。
Examples 1 to 6 (the shape of FIG. 1) are cylindrical shapes having a diameter of 50 mmφ and a thickness of 22 mm. The surface has four grooves with a triangular cross section from the outer peripheral side to the center, and a hole is provided at the center. However, the concave groove does not communicate with the hole. Further, four convex sectors with a height of 0.15 mm having a vertex at a
比較例１〜６（図４の形状）は、直径５０ｍｍφ、厚み２２ｍｍの円柱形で、４本の凹溝が中心の孔に連通している。また、外周から１５ｍｍの位置に頂点を有する４つの高さ０．１５ｍｍの凸状扇形が形成されており、凹溝の外周端上部の角は取られていない。
比較例７〜１２（図５の形状）は、直径５０ｍｍφ、厚み２２ｍｍの円柱形で４本の溝は中心の開口部（孔）に連通しており、平面上扇形の上にフェルトが載置されている。
Comparative Examples 1 to 6 (the shape of FIG. 4) have a cylindrical shape with a diameter of 50 mmφ and a thickness of 22 mm, and four concave grooves communicate with the central hole. Further, four convex sectors having a height of 0.15 mm having a vertex at a position 15 mm from the outer periphery are formed, and the corners at the upper part of the outer peripheral end of the groove are not taken.
Comparative Examples 7 to 12 (shape shown in FIG. 5) are cylindrical with a diameter of 50 mmφ and a thickness of 22 mm, and the four grooves communicate with the central opening (hole), and the felt is placed on the fan on the plane. Has been.
［機器音質性能評価］
音響機器での評価は、一般家庭の和室を用いた。
音響設備は、プリメインアンプ（Accuphase E560、Marantz PM7003）、ＤＡＣ（Esoteric N05、Pioneer U05）、ＦＭチューナー（KENWOOD L01T）、ＣＤプレーヤー（Accuphase DP550、TEAC RWD280）、レコードプレーヤー（Victor QLY7）、カセットデッキ（Nakamichi CR50）、ＤＡＴ（TASCAM DA25）、クリーン電源（Accuphase PS520）、スピーカー（FOSTEX GX100Limited、GX100、JBL L26、Onkyo D092TX）、パソコンＴＶ（富士通FMV DESKPOWER）、ＢＤレコーダー（Panasonic DMRBR590）を用い、共鳴体を機器の裏側に入れ、音質の変化を調べた。
[Equipment sound quality performance evaluation]
For the evaluation with audio equipment, a Japanese-style room in a general household was used.
The audio equipment includes pre-main amplifier (Accuphase E560, Marantz PM7003), DAC (Esoteric N05, Pioneer U05), FM tuner (KENWOOD L01T), CD player (Accuphase DP550, TEAC RWD280), record player (Victor QLY7), cassette deck ( Nakamichi CR50), DAT (TASCAM DA25), Clean power supply (Accuphase PS520), Speaker (FOSTEX GX100Limited, GX100, JBL L26, Onkyo D092TX), PC TV (Fujitsu FMV DESKPOWER), BD recorder (Panasonic DMRBR590) Was put on the back of the device, and the change in sound quality was examined.
［楽器音質性能評価］
チェロ、コントラバス、グランドピアノ(カワイ)について、楽器の下に敷いて音質の変化を調べた。
[Musical instrument sound quality performance evaluation]
The cello, contrabass, and grand piano (Kawai) were placed under the instrument and examined for changes in sound quality.
［評価方法］
評価項目は、(1)「不快な低周波振動」、(2)「心地よい自然な響き」とし、(2)については更に「中低音の伸び」と「高音域の伸び」と「各楽器、声楽本来の音質と伸び」と「音の立体感」とした。
[Evaluation method]
The evaluation items were (1) `` unpleasant low frequency vibration '', (2) `` comfortable natural sound '', and (2) was further divided into `` midrange bass extension '', `` high range extension '' and `` each instrument, The original sound quality and growth of vocal music and "three-dimensional sound".
［評価曲］
評価曲は、使用楽器が強調される、周波数の異なる音源を用意し、総合評価とした。
・ニューミュージック(声、ギター、ベース、ドラム:30Hz〜18kHz:中心400Hz〜3kHz)
・ジャズ(ピアノ:30Hz〜5kHz:中心300Hz〜2kHz)
・クラシック(管弦楽:100Hz〜4kHz:中心300Hz〜2kHz)
・ロック(ギター、ベース、ドラム、キーボード:40Hz〜18kHz:中心100Hz〜1kHz)
[Evaluation song]
For the evaluation songs, we prepared sound sources with different frequencies that emphasize the instruments used, and made the overall evaluation.
New music (voice, guitar, bass, drum: 30Hz-18kHz: center 400Hz-3kHz)
・ Jazz (Piano: 30Hz to 5kHz: Center 300Hz to 2kHz)
・ Classic (Orchestra: 100Hz ~ 4kHz: Center 300Hz ~ 2kHz)
・ Rock (guitar, bass, drum, keyboard: 40Hz-18kHz: center 100Hz-1kHz)
［評価者］
評価者として、嗜好、性別、年齢(２２〜６２才)の異なる２０名を任意に選び、結果の平均を取った。音響性能の評価基準は次のとおりである。
◎：１５〜２０人が良いと評価
○：１０〜１４人が良いと評価
△：５〜９人が良いと評価
×：０〜４人が良いと評価
[Rater]
Twenty persons with different tastes, genders, and ages (22 to 62 years old) were arbitrarily selected as evaluators, and the results were averaged. The evaluation criteria for acoustic performance are as follows.
◎: 15-20 people evaluated as good ○: 10-14 people evaluated as good △: 5-9 people evaluated as good ×: 0-4 people evaluated as good
上記各評価方法により得た、実施例及び比較例に係る共鳴体の評価結果を、表３〜５に示す。 The evaluation results of the resonators according to Examples and Comparative Examples obtained by the above evaluation methods are shown in Tables 3 to 5.
表３〜５の評価結果から、本発明に係る形状の共鳴体を使用することによって、比較した他の形状のものに比べ、不快な低周波振動が軽減され、心地よい自然な響きが得られるというきわめて良好な結果が得られていることがみてとれる。さらに、中低音及び高音域の伸び、各楽器、声楽本来の音質と伸び、音の立体感についても良好な結果が得られている。 From the evaluation results of Tables 3 to 5, by using the resonator of the shape according to the present invention, unpleasant low-frequency vibration is reduced and a pleasant natural sound is obtained compared to other compared shapes. It can be seen that very good results have been obtained. In addition, good results have been obtained with respect to the expansion of middle and low tones, the sound quality and extension of each musical instrument and vocal music, and the three-dimensional feel of the sound.
本発明の共鳴体は、音響機器、楽器に使用した時、床などの載置部材や人体からの跳ね返り振動を受けても一定の設計通りの音質を保つことができるという効果を奏し、音響機器（アンプ、ＣＤプレーヤー、ＤＡＣ、ＢＤレコーダー、ＴＶ、クリーン電源、ＦＭ・ＡＭチューナー、グラフィックイコライザー、ＤＡＤ、レコードプレーヤー、ネットワークプレーヤー、カセットデッキ、ＤＡＴ等）および、楽器（ピアノ、バイオリン、ビオラ、チェロ、コントラバス等）を支持するための共鳴体としてきわめて利用価値の高いものである。 The resonator of the present invention has an effect that when used in an acoustic device or a musical instrument, it can maintain a sound quality as a certain design even when subjected to a rebound vibration from a mounting member such as a floor or a human body. (Amplifier, CD player, DAC, BD recorder, TV, clean power supply, FM / AM tuner, graphic equalizer, DAD, record player, network player, cassette deck, DAT, etc.) and musical instruments (piano, violin, viola, cello, It is extremely useful as a resonator for supporting a contrabass etc.).
１ 共鳴体
２ 凹溝
３ 孔
４ 扇形
５ 角
６ フェルト
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62250577A (en) * | 1986-04-23 | 1987-10-31 | Aisin Takaoka Ltd | Stand for acoustic equipment |
| JPH0635488A (en) * | 1992-04-07 | 1994-02-10 | Takaharu Kumashiro | Board and foot for a/v equipment or musical instrument |
| JP2008070632A (en) * | 2006-09-14 | 2008-03-27 | Shinichi Hamada | Acoustic apparatus board |
| JP2016086408A (en) * | 2014-10-24 | 2016-05-19 | 日清紡ブレーキ株式会社 | Insulator for acoustic device |
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2017
- 2017-02-17 JP JP2017028329A patent/JP6285061B1/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62250577A (en) * | 1986-04-23 | 1987-10-31 | Aisin Takaoka Ltd | Stand for acoustic equipment |
| JPH0635488A (en) * | 1992-04-07 | 1994-02-10 | Takaharu Kumashiro | Board and foot for a/v equipment or musical instrument |
| JP2008070632A (en) * | 2006-09-14 | 2008-03-27 | Shinichi Hamada | Acoustic apparatus board |
| JP2016086408A (en) * | 2014-10-24 | 2016-05-19 | 日清紡ブレーキ株式会社 | Insulator for acoustic device |
Non-Patent Citations (2)
| Title |
|---|
| そうてんの趣味日和 ＫＡＮＡＤＥ０２ＢＦ, JPN6017032076, 30 November 2016 (2016-11-30), JP * |
| 小林 満 KOBAYASI, MITSURU , 金井 隆雄 KANAI, TAKAO: "空間を利用した高性能複合材インシュレータの開発（第１報） Development of High Performance Composite", 日本音響学会 ２０１６年 春季研究発表会講演論文集ＣＤ−ＲＯＭ ［ＣＤ−ＲＯＭ］, JPN6017032077, 24 February 2016 (2016-02-24), JP, pages 951 - 954 * |
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