JP2779602B2 - A sound generator that forms a limited audible area - Google Patents
A sound generator that forms a limited audible areaInfo
- Publication number
- JP2779602B2 JP2779602B2 JP6270089A JP27008994A JP2779602B2 JP 2779602 B2 JP2779602 B2 JP 2779602B2 JP 6270089 A JP6270089 A JP 6270089A JP 27008994 A JP27008994 A JP 27008994A JP 2779602 B2 JP2779602 B2 JP 2779602B2
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- sound
- auxiliary
- main
- reflector
- 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.)
- Expired - Fee Related
Links
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- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、１人又は数人が限られ
た範囲で音を聞くことができるようにして、限定された
可聴領域を形成する発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 generating device which forms a limited audible area by allowing one or several persons to hear sound within a limited range.
【０００２】[0002]
【従来の技術】従来、１人又は数人の人が特定範囲で音
を聞くことができるようにする発音装置として指向性ス
ピーカが提案されている。この指向性スピーカは、放物
面曲線又は回転楕円面曲線などの曲線を形成する曲面形
状の音響反射板を用い、スピーカ本体から発せられる音
を周囲に漏らさないようにして数人の人が特定の範囲の
みで音を聞くようにして限定された可聴領域を形成する
ものである（例えば特開平２−８７７９７号、特開平３
−１２８５９７号、特開平５−２０７５８４号）。2. Description of the Related Art Conventionally, a directional speaker has been proposed as a sound generating device that enables one or several persons to hear sound in a specific range. This directional loudspeaker uses a curved acoustic reflector that forms a curve such as a parabolic curve or a spheroid curve, and is specified by several people so as not to leak sound emitted from the speaker body to the surroundings. (See, for example, Japanese Patent Application Laid-Open Nos.
-128597, JP-A-5-207584).
【０００３】また、今日では、１人だけで音を間く装置
としてはヘッドホーンやイヤホーンなどが多用されてい
る現状である。At present, headphones, earphones, and the like are frequently used as devices for releasing sound by one person.
【０００４】[0004]
【発明が解決しようとする課題】前述のように、回転楕
円面曲線の反響反射板を用いる発音装置は、スピーカ全
体が大型化し、設置が困難となる欠点があった。又、イ
ヤホーンやヘッドホーンは、発音体を人の頭など身体に
取り付ける故、煩わしく感じることがある欠点があっ
た。As described above, the sound generator using the reverberation reflector having a spheroidal curve has a drawback that the whole speaker becomes large and installation becomes difficult. In addition, earphones and headphones have a drawback in that the sounding body is attached to the body such as the head of a person, so that the earphones and the headphone may feel troublesome.
【０００５】[0005]
【課題を解決するための手段】本発明は、直径が数ｃｍ
乃至数十ｃｍの半球形状をした枠体を用い、この枠体の
開口部に短円筒状の反射板を同心円状として複数個設
け、この反射板は短円筒状とした反射板の外周表面に吸
音材を張り付け、外方の反射板は球面形状のように内方
へ僅かに湾曲させた環状形状として内方の反射板よりも
長くし、更に枠体の中央底部に発音体を設けてスピーカ
とし、可聴領域が枠体の開口部近傍に限定される発音装
置とする。SUMMARY OF THE INVENTION The present invention relates to a method for measuring a diameter of several cm.
Using a frame having a hemispherical shape of from several tens cm to several tens cm, a plurality of short cylindrical reflectors are provided concentrically at the opening of the frame, and this reflector is provided on the outer peripheral surface of the reflector having a short cylindrical shape. Attach sound-absorbing material, the outer reflector is inward like a spherical shape
To be longer than the inside of the reflecting plate as an annular shape obtained by slightly curved, and speaker to pronounce body further provided at the center bottom portion of the frame, sound generating device and the audible range is limited to the vicinity of the opening of the frame I do.
【０００６】又、本発明は、主スピーカと補助スピーカ
とを組合わせたユニットとし、複数個のユニットを組合
わせ、各主スピーカを内側とし、主スピーカに入力され
る信号と逆位相の信号が入力される補助スピーカを外方
に配置した発音装置とすることがある。Further, the present invention provides a unit in which a main speaker and an auxiliary speaker are combined, a plurality of units are combined, each main speaker is inside, and a signal having a phase opposite to a signal input to the main speaker is generated. There is a case where a sound generating device in which an input auxiliary speaker is disposed outside.
【０００７】更に、主スピーカとする一方のスピーカに
入力される信号と逆位相の信号が入力される他のスピー
カを補助スピーカとし、主スピーカの後方をカバーで覆
うと共に主スピーカを覆うカバーの後方に補助スピーカ
を配置して主スピーカと補助スピーカとをスピーカケー
スに収納し、主スピーカを覆うカバーの周囲とスピーカ
ケースとの間に間隙を設けた発音装置とすることがあ
る。[0007] Further, another speaker to which a signal inputted to one of the main speakers and a signal having a phase opposite to that inputted to the other speaker is inputted is used as an auxiliary speaker, and the back of the main speaker is covered with a cover and the back of the cover which covers the main speaker. There is a case where an auxiliary speaker is disposed in a speaker case, the main speaker and the auxiliary speaker are housed in a speaker case, and a sound generating device is provided with a gap between a periphery of a cover covering the main speaker and the speaker case.
【０００８】[0008]
【作 用】本発明は、半球形状の枠体の中央底部に発音
体を設け、開口部に環状の反射板の複数個を同心円状に
有している故、音が拡散しないようにすることができ
る。また、同心円状とする各反射板は外周表面に吸音材
を有し、外方の反射板は内方に湾曲させて内方の反射板
よりも長くした発音装置は、音の拡散を一層確実に防止
することができる。According to the present invention, a sounding body is provided at the center bottom of a hemispherical frame, and a plurality of annular reflectors are concentrically provided at an opening to prevent sound from being diffused. Can be. Each concentric reflector has a sound absorbing material on the outer peripheral surface, and the outer reflector is curved inward to make it longer than the inner reflector. Can be prevented.
【０００９】そして、２個のスピーカを組み合わせてユ
ニットとし、一方のスピーカである主スピーカの位相に
対して逆位相の信号を他方の補助スピーカに加え、主ス
ピーカを内側として補助スピーカを外側に配置する発音
装置は、主スピーカの音を補助スピーカの音で打ち消す
ようにして音の拡散を防止することができる。 [0009] In its, a unit combining the two speakers, a signal of opposite phase in addition to the other auxiliary speaker for one of the speakers at which the main speaker phase, the outer auxiliary speaker main speaker as inner The sound emitting device arranged in the first position cancels the sound of the main speaker with the sound of the auxiliary speaker, thereby preventing sound diffusion.
【００１０】更に、主スピーカの後方をカバーで覆い、
このカバーの後方に補助スピーカを配置してスピーカケ
ースに収納する発音装置は、補助スピーカに主スピーカ
とは逆位相の信号を加える故、補助スピーカによる音の
位相を主スピーカによる音の位相と反転させ、この位相
を反転させた音をカバーとスピーカケースとの間隙から
流して主スピーカによる音場の周囲に補助スピーカによ
る音域を形成し、主スピーカの音をその周囲で打ち消
し、音の拡散を防止して限定された可聴領域を形成する
ことができる。Further, the rear of the main speaker is covered with a cover,
The sound generator that arranges the auxiliary speaker behind this cover and accommodates it in the speaker case applies a signal to the auxiliary speaker in a phase opposite to that of the main speaker, so that the sound phase of the auxiliary speaker is inverted from the sound phase of the main speaker. The sound whose phase has been inverted flows from the gap between the cover and the speaker case to form a sound range of the auxiliary speaker around the sound field of the main speaker, cancels the sound of the main speaker around the sound field, and diffuses the sound. In this way, a limited audible region can be formed.
【００１１】[0011]
【実施例】本発明に係る発音装置の第１実施例は、図１
に示すように、略半球形状をした枠体１３の中央底部に
発音体１１を設けるとともに、開口部には反射板１５を
設けるものである。この枠体１３は直径を数ｃｍ乃至数
十ｃｍとする略半球形状であり、発音体１１はその直径
が数ｃｍ以下の小型の発音体を用い、枠体１３が略半球
形状とされている故、枠体１３の開口部から出る音を拡
散させないようにして音を流すことができる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a sound generator according to the present invention is shown in FIG.
As shown in FIG. 5, a sounding body 11 is provided at the center bottom of a substantially hemispherical frame 13, and a reflector 15 is provided at an opening. The frame 13 has a substantially hemispherical shape with a diameter of several cm to several tens of cm. The sounding body 11 uses a small sounding body with a diameter of several cm or less, and the frame 13 has a substantially hemispherical shape. Therefore, it is possible to flow the sound without diffusing the sound coming out of the opening of the frame 13.
【００１２】そして、開口部に設ける反射板１５は、短
円筒形状又は僅かに内方に湾曲する球面状の環状体とさ
れる短円筒形状とし、外方の反射板１５は内方に湾曲さ
せ、且つ、内方の反射板１５よりも長くして開口部に配
置するものであり、この短円筒形状とする反射板１５
は、図２に示すように、例えば四方から支持板１４をも
って枠体１３の開口部に同心円状に固定するものであ
る。The reflecting plate 15 provided at the opening is a short circular cylinder or a spherical ring that is slightly curved inward.
The outer reflecting plate 15 is curved inward and is longer than the inner reflecting plate 15 and is disposed in the opening.
As shown in FIG. 2, for example, the support plate 14 is fixed concentrically to the opening of the frame body 13 from four sides with the support plate 14.
【００１３】したがってこの発音装置１０は、発音体１
１から発せられた音を短円筒状の反射板１５により枠体
１３の中心軸方向に集め、半球形状の枠体１３と相俟っ
て確実に音の拡散を防止して集音効果を高め、所定の範
囲のみに限定された可聴領域としての音場を形成するこ
とが容易にできることになる。Therefore, the sounding device 10 is provided with the sounding body 1
The sound emitted from 1 is collected in the direction of the central axis of the frame 13 by the short cylindrical reflector 15 and, together with the hemispherical frame 13, reliably prevents sound diffusion and enhances the sound collection effect. Therefore, it is possible to easily form a sound field as an audible region limited to only a predetermined range.
【００１４】なお、この発音体１１が発する音の音圧は
低く抑え、発音装置１０から数十ｃｍ乃至１ｍ程度の範
囲で明瞭に音が聞き取れるようにして音場を形成するこ
とが好ましい。It is preferable that the sound pressure of the sound emitted by the sounding body 11 be kept low and the sound field be formed so that the sound can be clearly heard from the sounding device 10 in a range of about several tens cm to 1 m.
【００１５】また、この反射板１５の外周表面には吸音
材２５を張り付けるものであり、この短円筒状とする反
射板１５の外表面に吸音材２５を張り付けることによ
り、枠体１３や外方に配置された他の反射板１５で反射
された音を内側の反射板１５に張り付けた吸音材２５で
吸収しつつ、発音体１１から発せられた音の内の反射板
１５の内側に当たる音を発音装置１０の中心軸方向に反
射し、音の拡散を一層確実に防止して発音装置１０の正
面方向に音場を形成することができる発音装置１０とす
ることができる。A sound absorbing material 25 is attached to the outer peripheral surface of the reflecting plate 15. By attaching the sound absorbing material 25 to the outer surface of the reflecting plate 15 having a short cylindrical shape, the frame 13 and the The sound reflected by the other reflection plate 15 disposed outside is absorbed by the sound absorbing material 25 attached to the inner reflection plate 15 and strikes the inside of the reflection plate 15 of the sound emitted from the sounding body 11. The sound generation device 10 can reflect the sound in the direction of the central axis of the sound generation device 10 and more reliably prevent the diffusion of the sound to form a sound field in the front direction of the sound generation device 10.
【００１６】したがって、この発音装置１０を、図３に
示すように、椅子６１に取り付けて頭の近くに配置すれ
ば、椅子６１に座った人にのみ音を聞かせることができ
ることになる。また、椅子６１に設ける場合、発音装置
１０を左右に設け、耳元に配置するように取り付けるこ
ともあり、図４に示すように、ディスプレイ６５や展示
物の上方に配置し、ディスプレイ６５などを見る人の
内、ディスプレイ６５などの正面近くの人にのみ音を聞
かせることも容易にできる。Therefore, as shown in FIG. 3, if the sound generating device 10 is attached to a chair 61 and arranged near the head, only the person sitting on the chair 61 can hear the sound. In addition, when provided on the chair 61, the sound generating device 10 may be provided on the left and right sides and attached so as to be placed near the ears. As shown in FIG. It is also possible to make it easy for only the person near the front such as the display 65 to hear the sound.
【００１７】そして、本発明の第２実施例は、図５に示
すように、２個のスピーカを近接させて配置し、一方を
主スピーカ５１とするとともに他方を補助スピーカ５５
とするものである。この補助スピーカ５５は、主スピー
カ５１から流す音の内、減衰特性の低い低音や例えば２
００ヘルツから１キロヘルツなどの音のように、周囲で
耳障となる特定周波数域の音の信号を逆位相として加え
るものであり、この補助スピーカ５５により主スピーカ
５１から流れる音の内の特定周波数域の音を補助スピー
カ５５の方向で打ち消すものである。[0017] Then, a second embodiment of the present invention is shown in Figure 5
So that two speakers are arranged close to each other, one of which is the main speaker 51 and the other is the auxiliary speaker 55.
It is assumed that. The auxiliary speaker 55 is a low sound having a low attenuation characteristic or a low sound having a low attenuation characteristic, for example.
A signal of a sound in a specific frequency range that is irritating to the surroundings, such as a sound from 00 Hz to 1 kHz, is added as an opposite phase, and a specific frequency of the sound flowing from the main speaker 51 by the auxiliary speaker 55 is added. The sound in the region is canceled in the direction of the auxiliary speaker 55.
【００１８】この主スピーカ５１と補助スピーカ５５と
を組み合わせてユニットとするに際しては、図６に示す
ように、主スピーカ５１の軸線と補助スピーカ５５の軸
線とを交差させるようにしてディスプレイ６５や展示物
などの左右に主スピーカ５１を内側とするように配置す
れば、主スピーカ５１から発する音の内、特定周波数域
の音の音圧を補助スピーカ５５からの音により小さく
し、主スピーカ５１からの音の拡散を防止し、ディスプ
レイ６５や展示物の正面近くに限定された可聴領域とし
ての音場を形成することができる。When the main speaker 51 and the auxiliary speaker 55 are combined to form a unit, as shown in FIG. 6, the display 65 and the display 65 are displayed so that the axis of the main speaker 51 and the axis of the auxiliary speaker 55 intersect. By arranging the main speaker 51 on the left and right of an object or the like so that the sound pressure of the sound in a specific frequency range among the sounds emitted from the main speaker 51 is reduced by the sound from the auxiliary speaker 55, Can be prevented, and a sound field as an audible area limited near the front of the display 65 or the exhibit can be formed.
【００１９】また、このユニットは、図７に示すよう
に、複数個のユニットを主スピーカ５１を相互に近接さ
せるように配置すれば、補助スピーカ５５から発する音
により主スピーカ５１から発する音のうち、特定周波数
域の音の音圧を小さくしつつ周囲に音を拡散させないよ
うにすることができ、主スピーカ５１に図１乃至図６に
示した発音装置１０を使用すれば、一層確実に音の拡散
を防止して特定の範囲に音場を形成することが容易に可
能となり、各主スピーカ５１や補助スピーカ５５の軸線
を一点に集中させることにより音場の範囲を容易に限定
することができる。As shown in FIG. 7, if a plurality of units are arranged so that the main speakers 51 are close to each other, the sound emitted from the auxiliary speaker 55 causes In addition, the sound pressure of the sound in the specific frequency range can be reduced, and the sound can be prevented from being diffused to the surroundings. If the sounding device 10 shown in FIGS. It is possible to easily form a sound field in a specific range by preventing the spread of the sound field, and to easily limit the range of the sound field by concentrating the axes of the main speakers 51 and the auxiliary speakers 55 at one point. it can.
【００２０】尚、１個の主スピーカ５１の周囲に複数個
の補助スピーカ５５を配置して特定周波数域の音が周囲
に拡散しないようにすることも可能である。更に、主ス
ピーカ５１と補助スピーカ５５との２個のスピーカを組
み合わせるに際し、図８に示すように、主スピーカ５１
の後方に補助スピーカ５５を配置した発音装置１０とす
ることもある。It is also possible to arrange a plurality of auxiliary speakers 55 around one main speaker 51 so that sound in a specific frequency range is not diffused to the surroundings. Further, when combining two speakers, the main speaker 51 and the auxiliary speaker 55, as shown in FIG.
May be the sounding device 10 in which the auxiliary speaker 55 is arranged behind the speaker.
【００２１】この実施例では、スピーカケース５９の内
部に主スピーカ５１と補助スピーカ５５とを収納するも
のであり、補助スピーカ５５をスピーカケース５９の内
部に固定し、主スピーカ５１をスピーカケース５９の口
部近くに配置固定すると共に、主スピーカ５１の後方に
は長半球形状のカバー５８を設け、スピーカケース５９
とカバー５８との間隙から補助スピーカ５５の音を流す
発音装置とし、主スピーカ５１の音場の周囲に主スピー
カ５１と逆位相とされた補助スピーカ５５からの音によ
る音域を形成するものである。In this embodiment, the main speaker 51 and the auxiliary speaker 55 are housed inside the speaker case 59, the auxiliary speaker 55 is fixed inside the speaker case 59, and the main speaker 51 is mounted on the speaker case 59. A long hemispherical cover 58 is provided at the rear of the main speaker 51, and the speaker case 59
And a sound generator that allows the sound of the auxiliary speaker 55 to flow from the gap between the main speaker 51 and the sound field of the auxiliary speaker 55 that is out of phase with the main speaker 51. .
【００２２】この場合も、主スピーカ５１が発する音の
うち、減衰率の小さな低音や耳障りとなる特定周波数域
の音を位相が逆となるように補助スピーカ５５から発音
させ、主スピーカ５１による音場の周囲で補助スピーカ
５５からの音によりこれらの音の音圧を小さくし、主ス
ピーカ５１からの音が周囲に広く拡散しないようにして
限定された可聴領域を形成することができるものであ
る。In this case, too, of the sounds emitted by the main speaker 51, the low sound with a small attenuation factor and the sound in a specific frequency range that is annoying are output from the auxiliary speaker 55 so that the phases are opposite to each other. The sound from the auxiliary speaker 55 reduces the sound pressure of these sounds around the field, so that the sound from the main speaker 51 is not diffused widely to form a limited audible area. .
【００２３】このように、主スピーカ５１と補助スピー
カ５５とを合わせたユニットにスピーカケース５９を被
せた発音装置では、スピーカケース５９の内部で補助ス
ピーカ５５により低音や特定周波数域の音の音圧を小さ
くし、特定周波数域などの音を打ち消した音をこの発音
装置から流して発音装置１０の開口部近辺に限定された
可聴領域を容易に形成することができる。As described above, in the sound generating device in which the speaker case 59 is put on the unit in which the main speaker 51 and the auxiliary speaker 55 are combined, the sound pressure of the low frequency sound or the sound of the specific frequency range is generated by the auxiliary speaker 55 inside the speaker case 59. Can be reduced, and a sound in which a sound in a specific frequency range or the like has been canceled can be flown from this sounding device to easily form an audible region limited near the opening of the sounding device 10.
【００２４】本発明の実施例は、このように、特定の範
囲にのみ容易に音場を形成することができる発音装置１
０であり、この発音装置１０により展示物の近辺などの
限られて範囲で明瞭に音を聞くことができるようにする
音場を形成するものであるから、イヤホーンなどのよう
に直接身体に触れることなく１人だけで音を聞くことが
でき、煩わしさや不潔感を与えることなく、不特定多数
の人々の内の１人にだけ順次又は適宜に音を聞かせるこ
とができるものである。As described above, the embodiment of the present invention provides a sound generating apparatus 1 capable of easily forming a sound field only in a specific range.
0, which forms a sound field that allows the user to clearly hear the sound in a limited area such as the vicinity of the exhibit, using the sounding device 10, and thus directly touches the body like an earphone. The sound can be heard by only one person without any trouble, and the sound can be heard sequentially or appropriately only by one of the unspecified number of people without giving any trouble or uncleanness.
【００２５】[0025]
【発明の効果】本発明は、小型半球形状の枠体と枠体の
開口部に同心円状の短円筒状の反射板を有し、この反射
板は外表面に吸音材を有して外方の反射板を内方に湾曲
させ、且つ、内方の反射板よりも長くする発音装置であ
る故、設置が容易な小型の発音装置であるとともに音の
拡散を防止し得る発音装置であり、１人又は数人の人の
みに音を聞かせることができ、直接耳などの身体に触れ
ることなく１人の人のみなどに音を聞かせることができ
る発音装置である故、煩わしさを与えることなく、枠体
の開口部近傍に可聴領域の音場を形成して所定の位置で
音を聞かせることができるものである。According to the present invention, there is provided a small hemispherical frame and a concentric short cylindrical reflector at the opening of the frame. Since the sound reflector is curved inward, and longer than the inner reflector, the sound generator is a small sound generator that can be easily installed and can prevent sound diffusion. This is a sounding device that allows only one person or a few people to hear the sound, and allows only one person to hear the sound without directly touching the body such as ears. Without forming a sound field in an audible region near the opening of the frame, the sound can be heard at a predetermined position.
【００２６】また、請求項２に記載した発明は、主スピ
ーカと補助スピーカとを合わせたユニットの複数を有
し、主スピーカを内側とし、主スピーカと逆位相の信号
を入力する補助スピーカを外側に設ける発音装置である
故、主スピーカから発する音の音圧を小さくして主スピ
ーカからの音が拡散しないようにすることができ、音の
拡散を防止して容易に限定された可聴領域としての音場
を形成することができる。Further, the invention described in claim 2 is a
Since the sound generator has a plurality of units combining a speaker and an auxiliary speaker, the main speaker is on the inside, and the auxiliary speaker for inputting a signal having a phase opposite to that of the main speaker is on the outside, the sound generated from the main speaker is The sound pressure can be reduced to prevent the sound from the main speaker from being diffused, and the sound can be prevented from being diffused to form a sound field as an easily defined audible region.
【００２７】更に、請求項３に記載した発明は、主スピ
ーカの後方をカバーで覆い、このカバーの後方に補助ス
ピーカを配置してスピーカケースに収納し、主スピーカ
の周囲に間隙を設ける発音装置である故、主スピーカに
加える信号と逆位相の信号を入力することにより補助ス
ピーカから発する音の位相を主スピーカが発する音の位
相と逆位相とし、主スピーカから発する音の音圧を小さ
くするように主スピーカの周囲から補助スピーカの音を
流し、主スピーカからの音が拡散しないようにすること
ができ、音の拡散を防止して容易に限定された可聴領域
としての音場を形成することができる。Further, according to a third aspect of the present invention, there is provided a sound generating device in which a rear portion of a main speaker is covered with a cover, an auxiliary speaker is disposed behind the cover and stored in a speaker case, and a gap is provided around the main speaker. Therefore, by inputting a signal having a phase opposite to that of the signal applied to the main speaker, the phase of the sound emitted from the auxiliary speaker is made opposite to the phase of the sound emitted by the main speaker, and the sound pressure of the sound emitted from the main speaker is reduced. In this way, the sound of the auxiliary speaker can be made to flow from around the main speaker to prevent the sound from the main speaker from being diffused, thereby preventing the diffusion of the sound and forming a sound field as an easily defined audible region. be able to.
【図１】本発明に係る発音装置の第１実施例を示す断面
図。FIG. 1 is a sectional view showing a first embodiment of a sound generating device according to the present invention.
【図２】本発明に係る発音装置の第１実施例を示す正面
図。FIG. 2 is a front view showing a first embodiment of a sound generating device according to the present invention.
【図３】本発明に係る発音装置の第１実施例の使用例を
示す図。FIG. 3 is a diagram showing a usage example of the first embodiment of the sound generating device according to the present invention.
【図４】本発明に係る発音装置の第１実施例の他の使用
例を示す図。FIG. 4 is a diagram showing another example of use of the first embodiment of the sound generating device according to the present invention.
【図５】本発明に係る限定された可聴領域の形成方法に
用いるスピーカのユニットを示す図。 FIG. 5 illustrates a method of forming a limited audible region according to the present invention .
The figure which shows the unit of the speaker used.
【図６】本発明に係る限定された可聴領域の形成方法の
一例を示す図。 FIG. 6 illustrates a method of forming a limited audible region according to the present invention .
The figure which shows an example.
【図７】本発明に係る発音装置の第２実施例を示す図。 FIG. 7 is a diagram showing a second embodiment of the sound generating device according to the present invention.
【図８】本発明に係る発音装置の第３実施例を示す図。 FIG. 8 is a diagram showing a third embodiment of the sound generating device according to the present invention.
１０ 発音装置 １１ 発音体 １３ 枠体 １５ 反射板 ２５ 吸音材 ５１ 主スピーカ ５５ 補助スピーカ５８ カバー ５９ スピーカケー
ス ６１ 椅子 ６５ ディスプレイ REFERENCE SIGNS LIST 10 sound generator 11 sound generator 13 frame 15 reflector 25 sound absorbing material 51 main speaker 55 auxiliary speaker 58 cover 59 speaker case
S61 Chair 65 Display
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) H04R 1/34 310──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) H04R 1/34 310
Claims (3)
形状の枠体を有し、この枠体の開口部に短円筒状の反射
板を同心円状として複数個有し、短円筒状とした反射板
は、その外周表面に吸音材を有し、外方の反射板は球面
状を形成する環状形状として内方へ僅かに湾曲し且つ内
方の反射板よりも長い短円筒状とされ、更に、前記枠体
の中央底部に発音体を有することを特徴とする限定され
た可聴領域を形成する発音装置。1. A short-cylindrical reflector having a substantially hemispherical frame having a diameter of several cm to several tens of cm, and having a plurality of concentric circular short-cylindrical reflectors in an opening of the frame. The reflector has a sound absorbing material on its outer peripheral surface, and the outer reflector has a spherical surface.
Is a inwardly slightly curved and has a length than the interior of the reflector short cylindrical shape as a circular shape to form a Jo, is further limited and wherein a sounding body in the central bottom portion of the frame A sound generator that forms an audible region.
ユニットの複数個を有し、各ユニットの主スピーカを内
側とし、主スピーカに入力される信号と逆位相とした特
定周波数の信号が入力される各補助スピーカを外方に位
置させたことを特徴とする限定された可聴領域を形成す
る発音装置。2. A combination of a main speaker and an auxiliary speaker.
It has multiple units, and the main speaker of each unit is
And the phase of the signal input to the main speaker
Position each auxiliary speaker, to which a constant frequency signal is input,
Sound generating device for forming a restricted audible regions, characterized in that by location.
スピーカの後方がカバーで覆われ、主スピーカに入力さ
れる信号と逆位相の信号が入力される補助スピーカを主
スピーカのカバーの後方に配置して主スピーカと補助ス
ピーカとがスピーカケースに収納され、主スピーカを覆
うカバーの周囲とスピーカケースとの間に間隙を有する
ことを特徴とする限定された可聴領域を形成する発音装
置。And a main speaker and an auxiliary speaker.
The back of the speaker is covered with a cover and
Auxiliary loudspeaker to which a signal of opposite phase
Place the main speaker and auxiliary speaker behind the speaker cover.
The speaker is housed in the speaker case and covers the main speaker.
A sound generating device for forming a limited audible area , wherein a gap is provided between a periphery of a cover and a speaker case .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6270089A JP2779602B2 (en) | 1994-11-04 | 1994-11-04 | A sound generator that forms a limited audible area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6270089A JP2779602B2 (en) | 1994-11-04 | 1994-11-04 | A sound generator that forms a limited audible area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08140179A JPH08140179A (en) | 1996-05-31 |
| JP2779602B2 true JP2779602B2 (en) | 1998-07-23 |
Family
ID=17481383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6270089A Expired - Fee Related JP2779602B2 (en) | 1994-11-04 | 1994-11-04 | A sound generator that forms a limited audible area |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2779602B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4923445B2 (en) * | 2005-06-17 | 2012-04-25 | フジテック株式会社 | Voice guidance device for escalators or moving walkways |
| CN109257054A (en) * | 2018-10-29 | 2019-01-22 | 咪付（广西）网络技术有限公司 | A kind of sound receiver with enhancing sensitivity |
| WO2022014166A1 (en) * | 2020-07-13 | 2022-01-20 | パナソニックＩｐマネジメント株式会社 | Sound reproduction device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4035286Y1 (en) * | 1965-07-28 | 1965-12-13 | ||
| JPS5910061Y2 (en) * | 1977-08-15 | 1984-03-29 | 大和製岳株式会社 | Easy-to-open lid |
| JPS55152779U (en) * | 1979-04-20 | 1980-11-04 | ||
| JPS55155179U (en) * | 1979-04-24 | 1980-11-08 | ||
| JPH01167793U (en) * | 1988-05-17 | 1989-11-27 | ||
| JP2651383B2 (en) * | 1989-03-14 | 1997-09-10 | パイオニア株式会社 | Speaker device with directivity |
| JPH0467894U (en) * | 1990-10-23 | 1992-06-16 | ||
| JPH04339494A (en) * | 1991-05-16 | 1992-11-26 | Matsushita Electric Ind Co Ltd | Directional loudspeaker device |
| JP3267999B2 (en) * | 1992-02-20 | 2002-03-25 | 株式会社東芝 | Speaker system |
-
1994
- 1994-11-04 JP JP6270089A patent/JP2779602B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08140179A (en) | 1996-05-31 |
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