JPH046599A - Acoustic device - Google Patents

Acoustic device

Info

Publication number
JPH046599A
JPH046599A JP2107441A JP10744190A JPH046599A JP H046599 A JPH046599 A JP H046599A JP 2107441 A JP2107441 A JP 2107441A JP 10744190 A JP10744190 A JP 10744190A JP H046599 A JPH046599 A JP H046599A
Authority
JP
Japan
Prior art keywords
sound
reflector
speaker
sound source
revolution
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.)
Pending
Application number
JP2107441A
Other languages
Japanese (ja)
Inventor
Hiroshi Ono
博 小野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP2107441A priority Critical patent/JPH046599A/en
Priority to CA 2022002 priority patent/CA2022002C/en
Priority to DE1990632304 priority patent/DE69032304T2/en
Priority to EP19900115030 priority patent/EP0411671B1/en
Publication of JPH046599A publication Critical patent/JPH046599A/en
Priority to US08/046,391 priority patent/US5268539A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To increase the level of a collected sound by arranging an acoustic tube for sound irradiation at one focus on an elliptic surface of rotation and arranging a speaker as a sound source outside a reflecting body. CONSTITUTION:The speaker 2 is fitted as the sound source to a support 1 which is fixed to a structure and the reflection body 5 which includes part of the elliptic surface 4 of rotation, which has one axis 3, e.g. perpendicular line as an axis of rotation and has two focuses S1 and S2 on the axis 3, as its internal surface is fitted to the support 1. The acoustic tube 6 is fitted extending from the speaker 2 to one focus S1 of the reflection body 5 and a nozzle 7 is fitted there while facing the center of the reflection body 5. The sound from the speaker 2 reaches the nozzle 7 through the acoustic tube 6 to irradiate the reflection body 5 and the sound is reflected by the reflection body 5 and converged on the focus S2 without leaking out. Consequently, a large output is obtained without disordering the sound field in the reflection body 5.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は音響装置に係り、さらに詳しくは反射体による
音響レンズの原理を用いた音@i!装置に関するもので
ある。
[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an acoustic device, and more particularly to a sound @i! using the principle of an acoustic lens using a reflector. It is related to the device.

〔従来の技術〕[Conventional technology]

音響レンズは、焦点を有する各種の曲面の反射体に向っ
て音源からの音波を照射して、反射する音波を収束、拡
散させるもので、その原理は従来より知られており、屋
外音楽堂や音楽ホールなどの建築物に通用可能である。
Acoustic lenses emit sound waves from a sound source toward various curved reflectors that have a focal point, and converge and diffuse the reflected sound waves.The principle of this is known for a long time, and it is commonly used in outdoor music halls and other places. It can be used in buildings such as music halls.

しかしながら、従来の音響装置は殆どが、上記建築物に
収容された多数の聴衆全体に音声が行きわたるようにし
たものである。
However, most conventional audio systems are designed to distribute the sound throughout a large audience housed in the building.

これに対し、一つの建築物内にあっても、特定の範囲内
で個人あるいはある限定された小人数の人々にのみ音声
を集音し、その周囲には音声を及ぼさないようにしたい
という要請もある。特に、難聴者のみに大きい音声を送
りたいという要請は強い。そして、そのための音響装置
として、本発明者は特願平01−202601 、特願
平01−202602に見られる装置を提案した。この
装置は二つの焦点をもつ曲面で内面が形成された反射体
を備え、一方の焦点位置にスピーカ等の音源を配し、反
射により集音がなされる他方の焦点位置で個人が音声を
聴くようにしたものである。したがって、その範囲外の
周辺に音声を及ぼすことなく、上記他方の焦点位置にあ
る者のみが大きな音声を聴くことができる。
In contrast, there is a desire to collect sound only to individuals or a limited number of people within a specific range, even within a single building, and to prevent sound from reaching the surrounding area. There is also. In particular, there is a strong desire to send loud audio only to people with hearing loss. As an audio device for this purpose, the present inventor proposed the devices shown in Japanese Patent Application No. 01-202601 and Japanese Patent Application No. 01-202602. This device is equipped with a reflector whose inner surface is a curved surface with two focal points. A sound source such as a speaker is placed at one focal position, and an individual listens to the sound at the other focal position where the sound is collected by reflection. This is how it was done. Therefore, only the person at the other focal position can hear the loud sound without affecting the surroundings outside the range.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかしながら、集音された大きな音声を聴くことができ
るのは、他方の焦点に位置する者あるいはその近傍にお
けるきわめて限られた人数である。
However, only a very limited number of people located at the other focal point or in the vicinity can hear the collected loud sounds.

また、かかる小人数を収容する反射体はその大きさも限
られたものとなり、その中に上記一方の焦点にスピーカ
を配置することは、該スピーカボックスの寸法が反射体
に対して大きな割合を占める場合、該スピーカボックス
で乱反射を起こしてしまい好ましくない。さりとて、ス
ピーカボックスを小さくすると十分な音声出力を得るこ
とができない。
In addition, the size of a reflector that accommodates such a small number of people is limited, and placing a speaker at one of the focal points in the reflector requires that the size of the speaker box occupies a large proportion of the reflector. In this case, the speaker box causes diffused reflection, which is undesirable. However, if the speaker box is made small, sufficient audio output cannot be obtained.

本発明はかかる問題を解決し、乱反射を起こすスピーカ
を用いることなく大出力を得る音響装置を提供すること
を第一の目的とし、さらにスピカを用いてもその影響が
きわめて少ない状態で反射体を大きくして多くの特定人
で音声を聴くことのできる音響装置を提供することを第
二の目的としている。
The primary purpose of the present invention is to solve such problems and provide an acoustic device that can obtain high output without using speakers that cause diffuse reflection.Furthermore, even if speakers are used, the reflector can be used in a state where the influence is extremely small. The second purpose is to provide an audio device that is large enough to allow a large number of specific people to listen to audio.

〔課題を解決するための手段〕[Means to solve the problem]

上記第一の目的は、 内面が二つの焦点をもつ回転楕円面の一部をなす反射体
と、 反射体の外部に設けられた音源から該反射体の一方の焦
点の位置にまで延び、先端開口が該一方の焦点の位置に
て反射体の内面に指向する音導管と、 を備えることとした第一の発明により達成される。
The first purpose is to provide a reflector whose inner surface forms part of an ellipsoid of revolution with two focal points, and a sound source that extends from a sound source provided outside the reflector to the position of one focal point of the reflector. This is achieved by the first invention, comprising: a sound conduit whose opening is directed toward the inner surface of the reflector at the position of the one focal point.

第二の目的は、 内面の中央部を回転放物面とし、その周囲部を二つの焦
点をもつ回転楕円面の一部とする反射体と、 反射体の一方の焦点に配設された音源と、を備えること
とした第二の発明によって達成される。
The second purpose is to create a reflector whose inner surface is a paraboloid of revolution at its center and whose surroundings are part of an ellipsoid of revolution with two focal points, and a sound source placed at one of the focal points of the reflector. This is achieved by a second invention comprising the following.

また、上記第二の目的は、 一つの断面での内面形状が二つの焦点をもつ楕円の一部
を有し、該楕円の一部が上記断面に対して直角方向に延
びて形成される反射体と、反射体の一方の焦点に配設さ
れた音源と、を備えることとした第三の発明によっても
達成される。
In addition, the second object is to provide a reflection system in which the inner surface shape in one cross section has a part of an ellipse with two focal points, and the part of the ellipse extends in a direction perpendicular to the cross section. This is also achieved by the third invention, which includes a body and a sound source disposed at one focal point of the reflector.

〔作用〕[Effect]

第一の発明にあっては、音源からの音声は音導管を経て
、回転楕円面の一方の焦点に位置する音導管の先端開口
より反射体に照射され、他方の焦点に集音される。その
際、一方の焦点にスピーカを配した従来の場合と異なり
、音場を乱すことなく、所望なだけ大きな出力の音声を
照射できる。
In the first invention, the sound from the sound source passes through the sound pipe, is irradiated onto the reflector through the tip opening of the sound pipe located at one focus of the spheroid, and is collected at the other focus. At this time, unlike the conventional case in which a speaker is placed at one focal point, it is possible to emit audio with as much output as desired without disturbing the sound field.

その結果、小さな直径の回転楕円体であっても十分な音
声を聴くことができる。
As a result, sufficient audio can be heard even in a spheroid with a small diameter.

第二の発明によれば、一方の焦点から照射された音声は
中央部の回転放物面の範囲で平行に反射し、周囲部の回
転楕円面では焦点に向は反射される。そのため、音声を
外部に及ぼすことなく、回転放物面の範囲内で複数の特
定人が音声を聴くことができる。
According to the second invention, the sound emitted from one focal point is reflected in parallel within the range of the paraboloid of revolution at the center, and is reflected in the direction toward the focal point by the ellipsoid of revolution at the periphery. Therefore, a plurality of specific people can listen to the audio within the range of the paraboloid of revolution without affecting the outside world.

また、第三の発明では、帯状に延びた他の焦点を中心に
幅をもつ帯状の範囲で複数の特定人が音声を聴くことが
できるようになる。
Further, in the third invention, a plurality of specific persons can listen to audio within a band-shaped range having a width centered around another focal point extending in a band-shape.

なお、上記第二及び第三の発明では、反射体は比較的大
きくすることができるために、スピーカボックスの寸法
は反射体に対しさほどの割合を占めないので、乱反射の
影響度が少なく、音源としてスピーカも使用可能である
In addition, in the second and third inventions, since the reflector can be made relatively large, the size of the speaker box does not occupy a large proportion of the reflector, so the influence of diffused reflection is small and the sound source is A speaker can also be used.

〔実施例〕〔Example〕

以下、添付図面に基づいて本発明の詳細な説明する。 Hereinafter, the present invention will be described in detail based on the accompanying drawings.

第1図に示される第一実施例において、lは横遺物に対
して固定された支持体であり、音源としてスピーカ2が
取り付けられている。
In the first embodiment shown in FIG. 1, l is a support fixed to the horizontal object, and a speaker 2 is attached as a sound source.

上記支持体lには、一つの軸線3、例えばM示の場合鉛
直線を回転軸線とし、該軸線3上に二つの焦点S1及び
S2をもつ回転楕円面4の一部を内面とする反射体5が
取り付けられている。。
The support 1 has one axis 3, for example, a vertical line in the case of M, as the axis of rotation, and a reflector whose inner surface is a part of an ellipsoid of revolution 4 having two focal points S1 and S2 on the axis 3. 5 is attached. .

さらに、上記スピーカ2からは音導管6が反射体5の一
方の焦点(図示の場合、上方の焦点)S+に向は延出し
て設けられ、そこにノズル7が反射体5の中央に向は取
り付けられている。なお、上記ノズルを用いずとも、音
導管の先端開口を反射体に指向し、その形状を音声の照
射に適したものとすればそれで十分である。
Furthermore, a sound pipe 6 is provided extending from the speaker 2 toward one focal point S+ of the reflector 5 (in the case shown, the upper focal point), and a nozzle 7 is installed therein toward the center of the reflector 5. installed. Note that, even without using the above-mentioned nozzle, it is sufficient if the tip opening of the sound guide tube is directed toward the reflector and its shape is suitable for irradiating sound.

かかる本実施例装置にあって、スピーカ2から音声を発
すると、この音声は音導管6を経て、焦点S1に位置す
るノズル7に達し、該ノズル7から反射体5に向は照射
される。音声は反射体5にて反射され外部に漏れること
なく焦点S2に集音される。したがって利用者は、該焦
点S2の位置に頭部を置くようにすれば、集音された音
声を聴くことができる。その際、本実施例では、スピー
カ2′、よ反射体5の外部に配置されているので、反射
体5内の音場を乱すことなく大きな出力とすることがで
きる。
In the device of this embodiment, when a sound is emitted from the speaker 2, the sound passes through the sound pipe 6 and reaches the nozzle 7 located at the focal point S1, and is irradiated from the nozzle 7 toward the reflector 5. The sound is reflected by the reflector 5 and collected at the focal point S2 without leaking to the outside. Therefore, the user can listen to the collected sounds by placing his or her head at the focal point S2. At this time, in this embodiment, since the speaker 2' is placed outside the reflector 5, a large output can be achieved without disturbing the sound field inside the reflector 5.

次に、第2図に示される第一実施例装置よれば、焦点S
2を中心として音声を聴くことのできる範囲を拡げるこ
とができると共に、その範囲内での音声レベルはかなり
均一なものとなる。
Next, according to the first embodiment shown in FIG.
The range in which audio can be heard can be expanded around 2, and the audio level within that range becomes fairly uniform.

本実施例では、反射体5゛の内面は、軸vA3を中心と
する中央部が回転放物面5’Aで、そして周囲部が回転
楕円面5’Bにより形成されている。
In this embodiment, the inner surface of the reflector 5' is formed by a paraboloid of revolution 5'A in the center centering on the axis vA3, and an ellipsoid of revolution 5'B at the peripheral part.

本実施例において、焦点S、に配設される音源が、前実
施例のごとくノズルによらずとも、反射体の直径を大き
くしてスピーカボックスの影響度を小さくすることによ
りスピーカを音源として利用できる。
In this embodiment, the sound source disposed at the focal point S can be used as a sound source by increasing the diameter of the reflector and reducing the influence of the speaker box, instead of using a nozzle as in the previous embodiment. can.

かかる本実施例では、音声は上記中央部の回転放物面5
’Aにて平行に反射される。
In this embodiment, the sound is transmitted through the paraboloid of revolution 5 at the center.
'Reflected in parallel at A.

一方、周囲部たる回転楕円面5’Bでは音声は焦点S2
に向は反射されて上記回転放物面5’Aがら反射された
音声と混合される。したがって、上記回転放物面5゛へ
の範囲内で所定音声レベルを得ることができ、該範囲内
で多くの人が音声を聴くことが可能となる。しかもその
範囲内での音声レベルはかなり均一なものとなる。
On the other hand, on the periphery of the spheroidal surface 5'B, the sound is focused at S2.
The sound is reflected from the paraboloid of revolution 5'A and mixed with the sound reflected from the paraboloid of revolution 5'A. Therefore, a predetermined sound level can be obtained within the range of the paraboloid of revolution 5', and many people can listen to the sound within this range. Furthermore, the audio level within that range is fairly uniform.

本実施例では、上記回転放物面5’Aの面積を加減する
ことにより、音声を聴く人の数に対応することができる
In this embodiment, by adjusting the area of the paraboloid of revolution 5'A, it is possible to accommodate the number of people listening to the audio.

また、利用者の人数の増大は横断面が第3図に示される
ような反射体5”をもつ第三実施例によっても可能であ
る。第3図では、反射体5”の内面形状が一つの断面で
二つの焦点をもつ楕円の一部を有する状態で、上記断面
に対して延びるような形態とすることにより、他の焦点
は線状にその範囲が拡大され、利用者は該範囲で集音さ
れた音声を聴くことができる。そして、上記範囲は実際
には線状の焦点に音声を聴くに十分な幅を有しており、
帯状のものとなる。なお、本実施例においても、音源と
してスピーカを使用できることは第二実施例の場合と同
様である。
Further, the number of users can be increased by a third embodiment having a reflector 5'' whose cross section is shown in FIG. 3. In FIG. 3, the inner surface shape of the reflector 5'' is By having a part of an ellipse with two foci in one cross section and extending to the above cross section, the range of the other foci is expanded linearly, and the user can You can listen to the collected audio. The above range is actually wide enough to hear audio at a linear focal point.
It becomes a band shape. Note that in this embodiment as well, a speaker can be used as a sound source, as in the case of the second embodiment.

〔発明の効果〕〔Effect of the invention〕

以上のごとくの本発明によれば、次のような効果を得る
According to the present invention as described above, the following effects are obtained.

先ず、第一の発明では、回転楕円面の一方の焦点に音声
を照射する音導管を配し、音源たるスピーカ等を反射体
の外部に配することとしたので、小さな反射体に対して
大出力のスピーカを用いても反射体内の音場を乱さず、
その結果、集音された音声が所定レベル以上とすること
が可能となる。
First, in the first invention, a sound pipe that emits sound is placed at one focal point of the spheroid, and the sound source, such as a speaker, is placed outside the reflector. Even when using an output speaker, it does not disturb the sound field inside the reflector,
As a result, it becomes possible to make the collected sound higher than the predetermined level.

次に第二の発明では、反射体の中央部に回転放物面を設
け、その範囲で音声が平行に反射されるようにしたので
、該範囲で複数の人が集音された音声を聴くことを可能
とする。
Next, in the second invention, a paraboloid of revolution is provided in the center of the reflector so that the sound is reflected in parallel within that range, so multiple people can listen to the collected sound within that range. make it possible.

さらに、第三の発明にあっては、他の焦点位置の範囲を
線状に延ばすことができるので、これを中心に形成され
る帯状の範囲で複数の人が集音された音声を聴くことを
可能とする。
Furthermore, in the third invention, since the range of other focal positions can be extended linearly, multiple people can listen to the collected sounds in a band-shaped range formed around this focal position. is possible.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の第一実施例装置の縦断面図、第2図は
第二実施例装置の縦断面図、第3図は第三実施例装置二
こおける反射体の横断面図である。 2・・・・・・・・・・・・・・・音源4・・・・・・
・・・・・・・・・回転楕円面5:5“=5−・・・・
・反射体
Fig. 1 is a longitudinal cross-sectional view of the device of the first embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view of the device of the second embodiment, and Fig. 3 is a cross-sectional view of the reflector in the device of the third embodiment. be. 2・・・・・・・・・・・・・・・Sound source 4・・・・・・
......Spheroidal surface 5:5"=5-...
・Reflector

Claims (3)

【特許請求の範囲】[Claims] (1)内面が二つの焦点をもつ回転楕円面の一部をなす
反射体と、 反射体の外部に設けられた音源から該反射体の一方の焦
点の位置にまで延び、先端開口が該一方の焦点の位置に
て反射体の内面に指向する音導管と、 を備えることとした音響装置。
(1) A reflector whose inner surface forms part of an ellipsoid of revolution with two focal points, and a sound source provided on the outside of the reflector that extends from a sound source to the position of one of the focal points of the reflector, and an aperture at the tip of the reflector. An acoustic device comprising: a sound conduit directed toward the inner surface of a reflector at a focal point of the reflector;
(2) 内面の中央部を回転放物面とし、その周囲部を
二つの焦点をもつ回転楕円面の一部とする反射体と、 反射体の一方の焦点に配設された音源と、 を備えることとした音響装置。
(2) A reflector whose inner surface has a central part as a paraboloid of revolution and whose peripheral part is part of an ellipsoid of revolution with two focal points, and a sound source placed at one of the focal points of the reflector. A sound device was prepared.
(3) 一つの断面での内面形状が二つの焦点をもつ楕
円の一部を有し、該楕円の一部が上記断面に対して直角
方向に延びて形成される反射体と、反射体の一方の焦点
に配設された音源と、 を備えることとした音響装置。
(3) A reflector whose inner surface shape in one cross section has a part of an ellipse with two focal points, and a part of the ellipse extends in a direction perpendicular to the cross section; An acoustic device comprising: a sound source placed at one focal point;
JP2107441A 1989-08-04 1990-04-25 Acoustic device Pending JPH046599A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2107441A JPH046599A (en) 1990-04-25 1990-04-25 Acoustic device
CA 2022002 CA2022002C (en) 1989-08-04 1990-07-26 Acoustic apparatus
DE1990632304 DE69032304T2 (en) 1989-08-04 1990-08-03 Acoustic device
EP19900115030 EP0411671B1 (en) 1989-08-04 1990-08-03 Acoustic apparatus
US08/046,391 US5268539A (en) 1989-08-04 1993-04-09 Acoustic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2107441A JPH046599A (en) 1990-04-25 1990-04-25 Acoustic device

Publications (1)

Publication Number Publication Date
JPH046599A true JPH046599A (en) 1992-01-10

Family

ID=14459230

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2107441A Pending JPH046599A (en) 1989-08-04 1990-04-25 Acoustic device

Country Status (1)

Country Link
JP (1) JPH046599A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08305370A (en) * 1995-05-08 1996-11-22 Ricoh Co Ltd Silencer and noise reflection surface member
JP2003533155A (en) * 2000-05-05 2003-11-05 ラカーラッバ エマニュエル A device for redistribution of acoustic energy
US6972268B2 (en) 2001-03-29 2005-12-06 Gsi Lumonics Corporation Methods and systems for processing a device, methods and systems for modeling same and the device
JP2006109339A (en) * 2004-10-08 2006-04-20 Yamaha Corp Acoustic system
KR101132973B1 (en) * 2010-03-31 2012-04-19 한국과학기술원 Directional acoustic source system
JP2018204289A (en) * 2017-06-02 2018-12-27 ヤマハ株式会社 Wall structure

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08305370A (en) * 1995-05-08 1996-11-22 Ricoh Co Ltd Silencer and noise reflection surface member
JP2003533155A (en) * 2000-05-05 2003-11-05 ラカーラッバ エマニュエル A device for redistribution of acoustic energy
US6972268B2 (en) 2001-03-29 2005-12-06 Gsi Lumonics Corporation Methods and systems for processing a device, methods and systems for modeling same and the device
US7027155B2 (en) 2001-03-29 2006-04-11 Gsi Lumonics Corporation Methods and systems for precisely relatively positioning a waist of a pulsed laser beam and method and system for controlling energy delivered to a target structure
US7192846B2 (en) 2001-03-29 2007-03-20 Gsi Group Corporation Methods and systems for processing a device, methods and systems for modeling same and the device
US8193468B2 (en) 2001-03-29 2012-06-05 Gsi Group Corporation Methods and systems for precisely relatively positioning a waist of a pulsed laser beam and method and system for controlling energy delivered to a target structure
JP2006109339A (en) * 2004-10-08 2006-04-20 Yamaha Corp Acoustic system
KR101132973B1 (en) * 2010-03-31 2012-04-19 한국과학기술원 Directional acoustic source system
JP2018204289A (en) * 2017-06-02 2018-12-27 ヤマハ株式会社 Wall structure

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