JPH0790952A - Sound absorber - Google Patents
Sound absorberInfo
- Publication number
- JPH0790952A JPH0790952A JP5261523A JP26152393A JPH0790952A JP H0790952 A JPH0790952 A JP H0790952A JP 5261523 A JP5261523 A JP 5261523A JP 26152393 A JP26152393 A JP 26152393A JP H0790952 A JPH0790952 A JP H0790952A
- Authority
- JP
- Japan
- Prior art keywords
- sound absorbing
- sound
- pipe
- cabinet
- absorbing device
- 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
Landscapes
- Building Environments (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複数の音響部材を組み
合わせて、理想の音響空間を提供する吸音装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing device which provides an ideal acoustic space by combining a plurality of acoustic members.
【０００２】[0002]
【従来の技術】近年、吸音材及び反射遮音材等の音響部
材を室内に最適に配置し、理想的な音響再生空間を実現
することがよく行われている。音楽を再生する試聴室等
には音の響きを調整するために吸音装置が用いられる。
吸音装置に用いられる吸音材として、グラスウール及び
ロックウールや、発泡高分子からなる多孔質音響吸音材
がある。このような吸音材を用いた従来の吸音装置につ
いて図５を用いて説明する。2. Description of the Related Art In recent years, it has often been practiced to optimally arrange acoustic members such as sound absorbing materials and reflective sound insulating materials in a room to realize an ideal sound reproduction space. BACKGROUND ART A sound absorbing device is used in a listening room or the like for reproducing music to adjust the sound reverberation.
As the sound absorbing material used in the sound absorbing device, there are glass wool, rock wool, and a porous acoustic sound absorbing material made of foamed polymer. A conventional sound absorbing device using such a sound absorbing material will be described with reference to FIG.
【０００３】図５は音響再生空間に使用される吸音装置
１の外観図である。吸音装置１は多数の吸音体２と反射
キャビネット３とをモザイク状に配列して構成される。
吸音体２は前述した多孔質音響吸音材を矩形に成形した
ものを基本ブロックする。反射キャビネット３はバフル
表面に四角錐体の突起を設けたバフル板を基本ブロック
とする。そして各基本ブロックは互いに同一形状又は相
似形状となるよう外形を設定する。そして、目標の残響
特性が得られるよう吸音体２と反射キャビネット３とを
組み合わせて壁面を構成する。こうして試聴室等の音響
再生空間を実現している。FIG. 5 is an external view of a sound absorbing device 1 used in a sound reproduction space. The sound absorbing device 1 is configured by arranging a large number of sound absorbing bodies 2 and a reflection cabinet 3 in a mosaic shape.
The sound absorbing body 2 is formed by forming the aforementioned porous acoustic sound absorbing material into a rectangular block. The reflection cabinet 3 uses a baffle plate having a quadrangular pyramid protrusion on the surface of the baffle as a basic block. Then, the outer shapes of the respective basic blocks are set so that they have the same shape or similar shapes. Then, the sound absorbing body 2 and the reflection cabinet 3 are combined to form a wall surface so that a target reverberation characteristic is obtained. In this way, a sound reproduction space such as a listening room is realized.
【０００４】[0004]
【発明が解決しようとする課題】このような従来の吸音
装置では、吸音又は反射拡散される音の周波数は、グラ
スウール及びロックウールや、発泡高分子からなる多孔
質音響吸音材の厚み等の材料固有の特性で制限される。
一方、吸音装置１が間仕切りとして利用される場合、そ
の壁面の厚さは８〜１５ｃｍ程度である。この場合の吸
音体２の厚みは５〜１０ｃｍ程度となる。この程度の吸
音体２の厚みでは、多孔質吸音材が吸音する音の周波数
特性は図６に示すように、高い周波数で吸音率が大きく
なるが、低い周波数では吸音率が小さくなる。このため
残響時間の周波数特性が平坦でなくなり、低域で長く高
域で短くなる。このように周波数の低い音が吸音拡散さ
れないため十分な残響特性が得られず、定在波やエコー
障害を取り除けないという問題があった。In such a conventional sound absorbing device, the frequency of sound absorbed or reflected and diffused is glass wool or rock wool, or a material such as the thickness of a porous acoustic sound absorbing material made of foamed polymer. Limited by its own characteristics.
On the other hand, when the sound absorbing device 1 is used as a partition, the wall thickness is about 8 to 15 cm. In this case, the sound absorber 2 has a thickness of about 5 to 10 cm. With such a thickness of the sound absorbing body 2, as shown in FIG. 6, the frequency characteristic of the sound absorbed by the porous sound absorbing material has a large sound absorbing coefficient at a high frequency, but a small sound absorbing coefficient at a low frequency. Therefore, the frequency characteristic of the reverberation time is not flat, and is long in the low range and short in the high range. In this way, since low-frequency sounds are not absorbed and diffused, sufficient reverberation characteristics cannot be obtained, and there is a problem that standing waves and echo disturbances cannot be removed.
【０００５】本発明は、このような従来の問題点に鑑み
てなされたものであって、壁となる吸音体の厚みを増す
ことなく、より低い周波数から音を吸音拡散させて優れ
た残響特性を実現することができ、定在波やエコー障害
を取り除くことのできる吸音装置を実現することを目的
とする。The present invention has been made in view of such conventional problems, and has excellent reverberation characteristics by absorbing and diffusing sound from a lower frequency without increasing the thickness of the sound absorbing body serving as a wall. It is an object of the present invention to realize a sound absorbing device that can realize the above and can eliminate standing waves and echo disturbances.
【０００６】[0006]
【課題を解決するための手段】本願の請求項１の発明
は、多孔質音響吸音材を縦横の長さが最低基準寸法の整
数倍となるよう略直方体に形成し、音の入射面から貫通
する貫通孔を設けた吸音体と、吸音体の貫通孔に一端が
接続される中空のパイプと、パイプの他端に接続され、
空間が内部に形成されたキャビネットと、を具備するこ
とを特徴とするものである。According to a first aspect of the present invention, a porous acoustic sound absorbing material is formed into a substantially rectangular parallelepiped so that the vertical and horizontal lengths are integral multiples of the minimum reference dimension, and penetrates from the sound incident surface. A sound absorber provided with a through hole, a hollow pipe whose one end is connected to the through hole of the sound absorber, and the other end of the pipe,
And a cabinet having a space formed therein.
【０００７】本願の請求項２の発明は、多孔質音響吸音
材を縦横の長さが最低基準寸法の整数倍となるよう略直
方体に形成し、音の入射面から貫通する複数個の貫通孔
を設けた吸音体と、各吸音体の貫通孔に一端が夫々接続
される中空のパイプと、パイプの他端に接続され、空間
の内容積が基準容積の整数倍となるように形成された複
数種のキャビネットと、を具備することを特徴とするも
のである。According to the second aspect of the present invention, the porous acoustic sound absorbing material is formed into a substantially rectangular parallelepiped so that the vertical and horizontal lengths are integral multiples of the minimum reference dimension, and a plurality of through holes penetrating from the sound incident surface. And a hollow pipe whose one end is connected to the through hole of each sound absorber, and the other end of the pipe, and the inner volume of the space is formed to be an integral multiple of the reference volume. A plurality of types of cabinets are provided.
【０００８】本願の請求項３の発明は、多孔質音響吸音
材を縦横の長さが最低基準寸法の整数倍となるよう略直
方体に形成し、音の入射面から貫通する複数個の貫通孔
を設けた吸音体と、各吸音体の貫通孔に一端が夫々接続
され、その音響的質量が基準値の整数倍となるよう複数
種類の長さに形成された中空のパイプと、パイプの他端
に接続され、空間が内部に形成されたキャビネットと、
を具備することを特徴とするものである。According to a third aspect of the present invention, the porous acoustic sound absorbing material is formed into a substantially rectangular parallelepiped so that the vertical and horizontal lengths are integral multiples of the minimum reference dimension, and a plurality of through holes penetrating from the sound incident surface. A sound absorbing body provided with, one end is connected to the through hole of each sound absorbing body, respectively, a hollow pipe formed in a plurality of lengths so that the acoustic mass is an integral multiple of the reference value, A cabinet connected to the end and having a space formed inside,
It is characterized by including.
【０００９】本願の請求項４の発明は、多孔質音響吸音
材を縦横の長さが最低基準寸法の整数倍となるよう略直
方体に形成し、音の入射面から貫通する複数個の貫通孔
を設けた吸音体と、各吸音体の貫通孔に一端が夫々接続
される中空のパイプと、吸音体の上下左右の少なくとも
一方の位置に取付けられ、入射音を反射拡散する拡散
板、及び前記パイプの他端に接続されて空間が形成され
た反射キャビネットと、を具備することを特徴とするも
のである。According to a fourth aspect of the present invention, the porous acoustic sound absorbing material is formed into a substantially rectangular parallelepiped so that the vertical and horizontal lengths are integral multiples of the minimum reference dimension, and a plurality of through holes penetrating from the sound incident surface. A sound absorber provided with, a hollow pipe whose one end is connected to the through hole of each sound absorber, a diffuser plate attached to at least one of the upper, lower, left and right sides of the sound absorber, for reflecting and diffusing incident sound, and And a reflection cabinet connected to the other end of the pipe to form a space.
【００１０】[0010]
【作用】このような特徴を有する本願の請求項１の発明
によれば、音響空間で不要な残響が発生すると、吸音体
の表面に音が入射し、多孔質吸音材で吸収される。ここ
での吸音率は吸音材の厚みの制限からやや高い周波数体
の音には有効となるが、低域では十分吸収されない。し
かし貫通孔を経てキャビットの内部に音が入ると、キャ
ビネットの内容積で決まる周波数の音がよく吸収され
る。この周波数は吸音体表面の吸収周波数より低く設定
できるので、吸音装置としての全周波数帯域で吸音特性
が改善される。According to the invention of claim 1 of the present application having such characteristics, when an unnecessary reverberation occurs in the acoustic space, the sound is incident on the surface of the sound absorbing body and is absorbed by the porous sound absorbing material. The sound absorption coefficient here is effective for the sound of a slightly high frequency body due to the limitation of the thickness of the sound absorbing material, but is not sufficiently absorbed in the low range. However, if sound enters the inside of the cavit through the through hole, the sound of the frequency determined by the internal volume of the cabinet is well absorbed. Since this frequency can be set lower than the absorption frequency of the surface of the sound absorbing body, the sound absorbing characteristic is improved in the entire frequency band of the sound absorbing device.
【００１１】請求項２の発明によれば、請求項１記載の
発明の作用に加えて、キャビネットをその内容積が数種
類となるよう設定しているので、吸収周波数帯の領域が
拡大することとなる。According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the cabinet is set to have several kinds of internal volumes, the region of the absorption frequency band is expanded. Become.
【００１２】請求項３の発明によれば、請求項１記載の
発明の作用に加えて、パイプの長さをその音響的質量が
互いに異なるよう数種類設けているので、キャビネット
の外形を同一にしたまま吸収周波数帯の領域が拡大する
こととなる。According to the third aspect of the present invention, in addition to the effect of the first aspect of the invention, since the pipe lengths are provided in several types so that their acoustic masses are different from each other, the cabinets have the same outer shape. The area of the absorption frequency band is expanded as it is.
【００１３】請求項４の発明によれば、請求項１記載の
発明の作用に加えて、反射キャビネットの内側に共鳴器
の空間を設けているので、キャビネットの取付け場所を
新たに設けなくてもよい。According to the invention of claim 4, in addition to the effect of the invention of claim 1, since the space for the resonator is provided inside the reflection cabinet, it is not necessary to newly install the cabinet. Good.
【００１４】[0014]
【実施例】本発明の第１実施例における吸音装置につい
て図１を用いて説明する。図１は第１実施例の吸音装置
１０の構成を示す外観図である。吸音壁となる吸音体１
１はグラスウール及びロックウールや発泡高分子からな
る多孔質音響吸音材等で構成される。吸音体１１の縦方
向の基準寸法をＹとし、横寸法をＸとすると、縦に対す
る横寸法比Ｘ／Ｙを１倍，２倍・・・整数倍となるよう
設定する。そして吸音体１１の外形形状を略直方体にす
る。EXAMPLE A sound absorbing device according to a first example of the present invention will be described with reference to FIG. FIG. 1 is an external view showing the configuration of the sound absorbing device 10 of the first embodiment. Sound absorbing body 1 that becomes a sound absorbing wall
Reference numeral 1 is composed of glass wool, rock wool, or a porous acoustic sound absorbing material made of foamed polymer. When the reference dimension in the vertical direction of the sound absorbing body 11 is Y and the horizontal dimension is X, the horizontal dimension ratio X / Y with respect to the vertical is set to be 1 times, 2 times ... Then, the outer shape of the sound absorbing body 11 is made into a substantially rectangular parallelepiped.
【００１５】次に吸音体１１の音の入射面に複数の貫通
孔１２を設ける。そしてこの貫通孔１２の夫々に外径が
貫通孔１２と略同一で屈曲可能な円筒状のパイプ１３を
接続する。更にこれらのパイプ１３の他の端面に中空で
密閉されたキャビネット１４を接続する。こうするとパ
イプ１３の部分での音響質量とキャビネット１４の部分
での音響容量によって、所謂ヘルムホルツの共鳴器が構
成される。Next, a plurality of through holes 12 are provided on the sound incident surface of the sound absorber 11. A cylindrical pipe 13 having an outer diameter substantially the same as that of the through hole 12 and being bendable is connected to each of the through holes 12. Further, a hollow and sealed cabinet 14 is connected to the other end surfaces of these pipes 13. In this way, a so-called Helmholtz resonator is constituted by the acoustic mass at the pipe 13 and the acoustic capacity at the cabinet 14.
【００１６】このように構成された吸音体１１と従来例
と同一の反射キャビネット３とを複数個組み合わせ、図
５に示すものと同様の吸音装置に組み立てる。パイプ１
３に接続されたキャビネット１４は壁面上に設ける必要
はなく、音響再生空間となる部屋の天井や反射キャビネ
ット３の裏側に設置すれば良い。A plurality of the sound absorbing body 11 thus constructed and the same reflection cabinet 3 as the conventional example are combined and assembled into a sound absorbing device similar to that shown in FIG. Pipe 1
The cabinet 14 connected to the cabinet 3 does not have to be provided on the wall surface, but may be installed on the ceiling of the room serving as the sound reproduction space or on the back side of the reflection cabinet 3.
【００１７】以上のように吸音装置１０を構成すると、
多孔質吸音材固有の吸音特性に加え、パイプ１３の部分
での音響質量とキャビネット１４の音響容量によってヘ
ルムホルツ共鳴器の共鳴周波数が決定される。従ってよ
り低い周波数帯における吸音特性を向上するには、多孔
質吸音材が吸音できない低い周波数にヘルムホルツ共鳴
器の中心周波数を設定すればよい。尚、屈曲可能なパイ
プ１３でキャビネット１４を接続すれば、音の入射面と
なる壁面以外の部分にもキャビネット１４を設けること
ができ、部屋の壁を厚くしなくても済む。When the sound absorbing device 10 is constructed as described above,
The resonance frequency of the Helmholtz resonator is determined by the acoustic mass of the pipe 13 and the acoustic capacity of the cabinet 14 in addition to the sound absorption characteristic of the porous sound absorbing material. Therefore, in order to improve the sound absorption characteristics in a lower frequency band, the center frequency of the Helmholtz resonator may be set to a low frequency at which the porous sound absorbing material cannot absorb sound. If the cabinet 14 is connected by the bendable pipe 13, the cabinet 14 can be provided on a portion other than the wall surface that is the incident surface of sound, and the wall of the room need not be thickened.
【００１８】次に本発明の第２実施例における吸音装置
について図２を用いて説明する。図２は第２実施例の吸
音装置２０の構成を示す外観図である。吸音壁となる吸
音体２１は第１実施例と同様にグラスウール及びロック
ウールや発泡高分子からなる多孔質音響吸音材で構成さ
れる。第１実施例と同様に吸音体２１の縦方向の基準寸
法をＹとし、横寸法をＸとすると、縦に対する横寸法比
Ｘ／Ｙを１倍，２倍・・・整数倍となるよう設定し、そ
の外形形状を略直方体にする。Next, a sound absorbing device according to the second embodiment of the present invention will be described with reference to FIG. FIG. 2 is an external view showing the configuration of the sound absorbing device 20 of the second embodiment. The sound absorbing body 21, which serves as a sound absorbing wall, is made of glass wool, rock wool, or a porous acoustic sound absorbing material made of foamed polymer as in the first embodiment. As in the first embodiment, when the vertical reference dimension of the sound absorbing body 21 is Y and the horizontal dimension is X, the horizontal dimension ratio X / Y with respect to the vertical is set to be 1 times, 2 times ... Then, its outer shape is made into a substantially rectangular parallelepiped.
【００１９】次に吸音体２１の音の入射面に複数の貫通
孔２２を設ける。そしてこの貫通孔２２の夫々に外径が
貫通孔２２と略同一で屈曲可能な円筒状のパイプ２３の
一端を接続する。更にこれらの複数のパイプ２３の他端
に形状の異なるキャビネット２４ａ，２４ｂ・・・２４
ｎを接続する。最小のキャビネット２４ａの内容積をＶ
とした場合、キャビネット２４ａ，２４ｂ，２４ｃ・・
・２４ｎの内容積は、夫々１Ｖ，２Ｖ，３Ｖ・・ｎＶと
する。尚、これられの容積比は，１，４，８，・・・２
N としてもよい。このように構成すると、より低い周波
数帯においてヘルムホルツ共鳴器の中心周波数が複数組
み設定されることになるので、低域の吸音特性がより平
坦になり、周波数に依存しない残響特性が得られる。Next, a plurality of through holes 22 are provided in the sound incident surface of the sound absorber 21. Then, each of the through holes 22 is connected to one end of a bendable cylindrical pipe 23 having an outer diameter substantially the same as that of the through hole 22. Further, cabinets 24a, 24b ... 24 having different shapes are provided at the other ends of the plurality of pipes 23.
Connect n. The minimum internal volume of cabinet 24a is V
, The cabinets 24a, 24b, 24c ...
・ The internal volume of 24n is 1V, 2V, 3V. In addition, these volume ratios are 1, 4, 8, ... 2
May be N. According to this structure, a plurality of center frequencies of the Helmholtz resonator are set in a lower frequency band, so that the sound absorption characteristic in the low frequency range becomes flatter and reverberation characteristic independent of frequency is obtained.
【００２０】本発明の第３実施例における吸音装置につ
いて図３を用いて説明する。図３は第３実施例の吸音装
置３０の構成を示す外観図である。第１，２実施例と同
様に、多孔質音響吸音材で構成された直方体の吸音体３
１に複数の貫通孔３２を設け、円筒状のパイプ３３を通
して同一形状のキャビネット３４を複数個接続する。A sound absorbing device according to the third embodiment of the present invention will be described with reference to FIG. FIG. 3 is an external view showing the configuration of the sound absorbing device 30 of the third embodiment. Similar to the first and second embodiments, a rectangular parallelepiped sound absorbing body 3 made of a porous sound absorbing material.
1 is provided with a plurality of through holes 32, and a plurality of cabinets 34 of the same shape are connected through a cylindrical pipe 33.
【００２１】第１，第２実施例と異なり、パイプ３３の
長さを各キャビネット３４毎に変える。最短のパイプを
パイプ３３ａとすると、音響的に等価な長さが１倍、２
倍・・・整数倍となるようなパイプ３３ａ，３３ｂ・・
・３３ｎを夫々設ける。このように吸音装置を構成する
と、ヘルムホルツの共鳴周波数をキャビネット３４毎に
異ならせることができ、低い周波数帯の吸音特性をキャ
ビネット３４の外形を同一にしながら改善することがで
きる。Unlike the first and second embodiments, the length of the pipe 33 is changed for each cabinet 34. If the shortest pipe is pipe 33a, the acoustically equivalent length is 1 times, 2
Multiples ... Pipes 33a, 33b ...
・ Provide 33n respectively. By configuring the sound absorbing device in this way, the resonance frequency of the Helmholtz can be made different for each cabinet 34, and the sound absorbing characteristics in the low frequency band can be improved while making the outer shape of the cabinet 34 the same.
【００２２】本発明の第４実施例における吸音装置４０
について説明する。第１〜第３実施例の吸音装置は、吸
音体とキャビネットとを個別に設けたが、図４に示すよ
うに本実施例の吸音装置４０では、反射キャビネットと
共鳴用のキャビネットを兼用している。この吸音装置４
０では、第１〜第３実施例と同様の吸音体４１を中央に
設け、その上下左右の隣接位置に反射キャビネット４２
を配設する。反射キャビネット４２の内部は共鳴箱とな
り、表面は例えば四角錐状に形成されて音の拡散体とな
る。そして吸音体４１に貫通孔４３を設け、反射キャビ
ネット４２の内部空間と吸音体４１をパイプ４４で連結
する。こうすると吸音体４１と反射キャビネット４２を
同一壁面上に設置でき、しかも壁面の厚さを厚くするこ
となく吸音装置４０を構成することができる。The sound absorbing device 40 according to the fourth embodiment of the present invention.
Will be described. In the sound absorbing devices of the first to third embodiments, the sound absorber and the cabinet are separately provided, but as shown in FIG. 4, in the sound absorbing device 40 of the present embodiment, the reflection cabinet and the resonance cabinet are combined. There is. This sound absorbing device 4
In 0, the sound absorbing body 41 similar to that of the first to third embodiments is provided at the center, and the reflection cabinet 42 is provided at the upper, lower, left and right adjacent positions thereof.
To arrange. The inside of the reflection cabinet 42 serves as a resonance box, and the surface thereof is formed in, for example, a quadrangular pyramid shape to serve as a sound diffuser. Then, a through hole 43 is provided in the sound absorber 41, and the internal space of the reflection cabinet 42 and the sound absorber 41 are connected by a pipe 44. In this way, the sound absorbing body 41 and the reflection cabinet 42 can be installed on the same wall surface, and the sound absorbing device 40 can be configured without increasing the wall thickness.
【００２３】[0023]
【発明の効果】以上のように請求項１記載の発明によれ
ば、パイプの音響質量とキャビネットの音響容量とによ
ってヘルムホルツの共鳴器が構成されているので、この
共鳴器の中心周波数を多孔質吸音材で吸音できない低い
周波数に設定することで、より低い周波数帯まで吸音効
果が得られる。又吸音体とキャビネットがパイプを介し
て接続されているので、音の入射面となる壁面以外の部
分にキャビネットを設けることができ、吸音用の壁の厚
みを薄くすることができる。As described above, according to the invention described in claim 1, since the Helmholtz resonator is constituted by the acoustic mass of the pipe and the acoustic capacity of the cabinet, the center frequency of the resonator is porous. By setting a low frequency at which the sound absorbing material cannot absorb sound, a sound absorbing effect can be obtained even in a lower frequency band. Further, since the sound absorbing body and the cabinet are connected via the pipe, the cabinet can be provided on a portion other than the wall surface which becomes the sound incident surface, and the thickness of the sound absorbing wall can be reduced.
【００２４】又本願の請求項２の発明によれば、請求項
１の発明の効果に加えて、パイプに接続された各キャビ
ネットの内容積が基準容積の整数倍となるよう複数組み
設けられているので、共鳴器の共鳴周波数をキャビネッ
トごとに異ならせることができる。このためより低い周
波数帯まで吸音特性を平坦にすることができる。従って
優れた残響特性を有し、定在波やエコー障害のない音響
空間が実現できる。According to the invention of claim 2 of the present application, in addition to the effect of the invention of claim 1, a plurality of sets are provided so that the internal volume of each cabinet connected to the pipe is an integral multiple of the reference volume. Therefore, the resonance frequency of the resonator can be different for each cabinet. Therefore, the sound absorption characteristics can be flattened to a lower frequency band. Therefore, it is possible to realize an acoustic space having excellent reverberation characteristics and free from standing waves and echo disturbances.
【００２５】本願の請求項３の発明によれば、請求項１
の発明の効果に加えて、各パイプの音響的質量が基準値
の整数倍となるよう複数の長さに形成されているので、
共鳴器の共鳴周波数をキャビネットの外形を変えずに任
意に設定することができる。According to the invention of claim 3 of the present application, claim 1
In addition to the effect of the invention of, since the acoustic mass of each pipe is formed in a plurality of lengths so as to be an integral multiple of the reference value,
The resonance frequency of the resonator can be arbitrarily set without changing the outer shape of the cabinet.
【００２６】本願の請求項４の発明によれば、請求項１
の発明の効果に加えて、音の拡散反射板となる反射キャ
ビネットの内部に共鳴器の空間を設けているため、キャ
ビネットの取付け場所を新たに設ける必要がなくなる。
このため壁厚みの薄い吸音体が実現できる。According to the invention of claim 4 of the present application, claim 1
In addition to the effect of the present invention, since the space for the resonator is provided inside the reflection cabinet that serves as a sound diffuse reflection plate, it is not necessary to provide a new cabinet installation location.
Therefore, a sound absorber having a thin wall can be realized.
【００２７】又請求項１〜６の発明はいずれも、吸音体
の外形形状が最小寸法の吸音体に対して整数倍に形成さ
れるので、吸音体を複数個積み重ねて吸音壁を作る場
合、吸収周波数の異なる吸音体を任意の場所に組み合わ
せて設置することができる。In any of the first to sixth aspects of the invention, since the outer shape of the sound absorbing body is formed to be an integral multiple of the sound absorbing body having the minimum size, when a plurality of sound absorbing bodies are stacked to form a sound absorbing wall, Sound absorbers having different absorption frequencies can be combined and installed at any place.
【図１】本発明の第１実施例における吸音装置の構成を
示す概略図である。FIG. 1 is a schematic diagram showing a configuration of a sound absorbing device in a first embodiment of the present invention.
【図２】本発明の第２実施例における吸音装置の構成を
示す概略図である。FIG. 2 is a schematic diagram showing a configuration of a sound absorbing device in a second embodiment of the present invention.
【図３】本発明の第３実施例における吸音装置の構成を
示す概略図である。FIG. 3 is a schematic diagram showing a configuration of a sound absorbing device in a third embodiment of the present invention.
【図４】本発明の第４実施例における吸音装置の構成を
示す概略図である。FIG. 4 is a schematic diagram showing a configuration of a sound absorbing device according to a fourth embodiment of the present invention.
【図５】従来例の吸音装置の構成を示す概略図である。FIG. 5 is a schematic diagram showing a configuration of a conventional sound absorbing device.
【図６】吸音装置に用いられる多孔質吸音材における吸
音率の周波数特性図である。FIG. 6 is a frequency characteristic diagram of sound absorption coefficient in a porous sound absorbing material used in a sound absorbing device.
１０，２０，３０，４０ 吸音装置 １１，２１，３１，４１ 吸音体 １２，２２，３２，４３ 貫通孔 １３，２３，３３ａ〜３３ｎ，４４ パイプ １４，２４ａ〜２４ｎ，３４ キャビネット ４２ 反射キャビネット 10, 20, 30, 40 Sound absorbing device 11, 21, 31, 41 Sound absorbing body 12, 22, 32, 43 Through hole 13, 23, 33a to 33n, 44 Pipe 14, 24a to 24n, 34 Cabinet 42 Reflecting cabinet
Claims (6)
準寸法の整数倍となるよう略直方体に形成し、音の入射
面から貫通する貫通孔を設けた吸音体と、 前記吸音体の貫通孔に一端が接続される中空のパイプ
と、 前記パイプの他端に接続され、空間が内部に形成された
キャビネットと、を具備することを特徴とする吸音装
置。1. A sound absorbing body, wherein a porous sound absorbing material is formed into a substantially rectangular parallelepiped so that the length and width are integer multiples of the minimum reference dimension, and a through hole is provided to penetrate from a sound incident surface, and the sound absorbing body. 1. A sound absorbing device, comprising: a hollow pipe having one end connected to the through hole of 1. and a cabinet connected to the other end of the pipe and having a space formed therein.
準寸法の整数倍となるよう略直方体に形成し、音の入射
面から貫通する複数個の貫通孔を設けた吸音体と、 前記各吸音体の貫通孔に一端が夫々接続される中空のパ
イプと、 前記パイプの他端に接続され、空間の内容積が基準容積
の整数倍となるように形成された複数種のキャビネット
と、を具備することを特徴とする吸音装置。2. A sound absorbing body, wherein a porous sound absorbing material is formed into a substantially rectangular parallelepiped so that the length and width are integer multiples of the minimum reference dimension, and a plurality of through holes penetrating from the sound incident surface are provided. A hollow pipe whose one end is connected to the through hole of each sound absorber, and a plurality of types of cabinets connected to the other end of the pipe and formed so that the internal volume of the space is an integral multiple of the reference volume. And a sound absorbing device.
準寸法の整数倍となるよう略直方体に形成し、音の入射
面から貫通する複数個の貫通孔を設けた吸音体と、 前記各吸音体の貫通孔に一端が夫々接続され、その音響
的質量が基準値の整数倍となるよう複数種類の長さに形
成された中空のパイプと、 前記パイプの他端に接続され、空間が内部に形成された
キャビネットと、を具備することを特徴とする吸音装
置。3. A sound absorbing body, wherein a porous acoustic sound absorbing material is formed into a substantially rectangular parallelepiped so that the length and width are an integral multiple of the minimum reference dimension, and a plurality of through holes penetrating from the sound incident surface are provided. One end is connected to each through hole of each of the sound absorbers, a hollow pipe formed into a plurality of types of lengths so that the acoustic mass is an integral multiple of a reference value, and the other end of the pipe is connected, A sound absorbing device, comprising: a cabinet having a space formed therein.
準寸法の整数倍となるよう略直方体に形成し、音の入射
面から貫通する複数個の貫通孔を設けた吸音体と、 前記各吸音体の貫通孔に一端が夫々接続される中空のパ
イプと、 前記吸音体の上下左右の少なくとも一方の位置に取付け
られ、入射音を反射拡散する拡散板、及び前記パイプの
他端に接続されて空間が形成された反射キャビネット
と、を具備することを特徴とする吸音装置。4. A sound absorbing body in which a porous acoustic sound absorbing material is formed in a substantially rectangular parallelepiped so that the length and width are integer multiples of the minimum reference dimension, and a plurality of through holes penetrating from the sound incident surface are provided. A hollow pipe whose one end is connected to the through hole of each sound absorber, a diffuser plate attached to at least one of the upper, lower, left, and right positions of the sound absorber to reflect and diffuse incident sound, and the other end of the pipe. And a reflection cabinet connected to form a space, the sound absorbing device.
ル、ロックウール、発泡高分子の何れかで構成されるこ
とを特徴とする請求項１〜４のいずれか１項に記載の吸
音装置。5. The sound absorbing device according to claim 1, wherein the sound absorbing material of the sound absorbing body is made of glass wool, rock wool, or foamed polymer.
あることを特徴とする請求項１〜４のいずれか１項に記
載の吸音装置。6. The sound absorbing device according to claim 1, wherein the pipe is a bendable cylindrical pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5261523A JP3062378B2 (en) | 1993-09-24 | 1993-09-24 | Sound absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5261523A JP3062378B2 (en) | 1993-09-24 | 1993-09-24 | Sound absorbing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0790952A true JPH0790952A (en) | 1995-04-04 |
| JP3062378B2 JP3062378B2 (en) | 2000-07-10 |
Family
ID=17363091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5261523A Expired - Fee Related JP3062378B2 (en) | 1993-09-24 | 1993-09-24 | Sound absorbing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3062378B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100366368B1 (en) * | 2000-03-13 | 2002-12-31 | 한국수력원자력 주식회사 | Sound absorbent device |
| JP2005090951A (en) * | 2003-09-16 | 2005-04-07 | General Electric Co <Ge> | Method and device for reducing sound of combustor |
| CN104347064A (en) * | 2013-07-29 | 2015-02-11 | 波音公司 | Hybrid acoustic barrier and absorber |
| CN111145713A (en) * | 2018-11-05 | 2020-05-12 | 雅马哈株式会社 | Sound absorbing structure |
| US11514879B2 (en) | 2018-11-05 | 2022-11-29 | Yamaha Corporation | Sound absorbing apparatus and sound absorption structure |
-
1993
- 1993-09-24 JP JP5261523A patent/JP3062378B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100366368B1 (en) * | 2000-03-13 | 2002-12-31 | 한국수력원자력 주식회사 | Sound absorbent device |
| JP2005090951A (en) * | 2003-09-16 | 2005-04-07 | General Electric Co <Ge> | Method and device for reducing sound of combustor |
| JP4620416B2 (en) * | 2003-09-16 | 2011-01-26 | ゼネラル・エレクトリック・カンパニイ | Method and apparatus for reducing combustor sound. |
| CN104347064A (en) * | 2013-07-29 | 2015-02-11 | 波音公司 | Hybrid acoustic barrier and absorber |
| CN111145713A (en) * | 2018-11-05 | 2020-05-12 | 雅马哈株式会社 | Sound absorbing structure |
| JP2020076796A (en) * | 2018-11-05 | 2020-05-21 | ヤマハ株式会社 | Sound absorption structure |
| US11514879B2 (en) | 2018-11-05 | 2022-11-29 | Yamaha Corporation | Sound absorbing apparatus and sound absorption structure |
| US11521589B2 (en) | 2018-11-05 | 2022-12-06 | Yamaha Corporation | Sound absorption structure |
| CN111145713B (en) * | 2018-11-05 | 2023-08-11 | 雅马哈株式会社 | Sound absorbing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3062378B2 (en) | 2000-07-10 |
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