JPH0775431B2 - Speaker system - Google Patents
Speaker systemInfo
- Publication number
- JPH0775431B2 JPH0775431B2 JP63106355A JP10635588A JPH0775431B2 JP H0775431 B2 JPH0775431 B2 JP H0775431B2 JP 63106355 A JP63106355 A JP 63106355A JP 10635588 A JP10635588 A JP 10635588A JP H0775431 B2 JPH0775431 B2 JP H0775431B2
- Authority
- JP
- Japan
- Prior art keywords
- sound
- acoustic tube
- speaker
- partition plate
- speaker system
- 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 - Lifetime
Links
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、スピーカ振動板の前面部に音波を導く音響管
を配置したスピーカシステムに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker system in which an acoustic tube for guiding sound waves is arranged on the front surface of a speaker diaphragm.
従来の技術 スピーカ振動板の前面部にホーンや音響管を設け、振動
板から発生した音波を開口部まで導く方法は、ホーンや
音響管を用いない場合に較べて出力音圧が大きく得られ
ることや、特定の方向に音が伝えられるなどの利点があ
り、従来から多く用いられている。Conventional technology A method in which a horn and an acoustic tube are installed on the front surface of a speaker diaphragm and the sound waves generated from the diaphragm are guided to the opening can obtain a larger output sound pressure than when a horn or acoustic tube is not used. Also, it has the advantage that sound can be transmitted in a specific direction, and has been widely used in the past.
以下、図面を参照しながら、従来のホーンや音響管のつ
いたスピーカシステムについて説明を行う。Hereinafter, a conventional speaker system having a horn and an acoustic tube will be described with reference to the drawings.
第３図は、上記スピーカシステムの構造断面図を示すも
のである。FIG. 3 is a structural sectional view of the speaker system.
第３図において、９はスピーカユニット、３はバックキ
ャビティ、8,7は音指導部である。In FIG. 3, 9 is a speaker unit, 3 is a back cavity, and 8 and 7 are sound guidance units.
以上のように構成されたホーンや音響管のついたスピー
カシステムについて以下の動作を説明する。The following operation will be described for the speaker system having the horn and the acoustic tube configured as described above.
スピーカ振動板の前面部に、振動板の近くでは面積が小
さく、開口部に近づくにしたがい、徐々に大きくなるホ
ーン８を配置し、またスピーカ振動板の背面部には背面
音を外部に放射させないようにバックキャビディ３を配
置している。ホーン８の長さが再生しようとする再生帯
域の波長より十分長ければ、再生音周波数特性は平坦な
特性が得られる。A horn 8 is arranged on the front surface of the speaker diaphragm, the area of which is small near the diaphragm and gradually increases as it approaches the opening, and the back surface of the speaker diaphragm does not emit back sound to the outside. The back cavidi 3 is arranged like this. If the length of the horn 8 is sufficiently longer than the wavelength of the reproduction band to be reproduced, the reproduced sound frequency characteristic is flat.
発明が解決しようとする課題 しかしながら、上記のような構成では、機器に組み込む
ため十分ホーン長を長くすることが出来ない場合には、
再生音周波数特性はピーク・ディップのある山谷の多い
特性となる。例えば第２図は、ホーンや音響管のついた
スピーカシステムの再生音圧周波数特性図を示してい
る。図中Ｂの特性は、従来の例えば第３図に示すような
ホーンや音響管のついたスピーカシステムの特性であ
る。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above configuration, when the horn length cannot be sufficiently increased to be incorporated in the device,
The reproduced sound frequency characteristic has many peaks and dips. For example, FIG. 2 shows a reproduced sound pressure frequency characteristic diagram of a speaker system having a horn and an acoustic tube. The characteristic B in the figure is the characteristic of a conventional speaker system with a horn and an acoustic tube as shown in FIG. 3, for example.
第４図に示すように、長さＬの音響管では、音速をＣと
したときに、周波数ｆ＝（2n−１）C/4L（ｎ＝1,2,3,…
…）で共振現象が発生し、再生音圧周波数特性に、ピー
ク・ディップが現れる。尚、第４図は、ｎ＝２の場合の
音圧分布と粒子速度分布を示すものである。As shown in FIG. 4, in the acoustic tube having the length L, when the sound velocity is C, the frequency f = (2n-1) C / 4L (n = 1,2,3, ...
...) causes a resonance phenomenon, and a peak dip appears in the reproduced sound pressure frequency characteristic. FIG. 4 shows the sound pressure distribution and the particle velocity distribution when n = 2.
本発明は上記問題点に鑑み、短いホーンや音響管を有す
るスピーカシステムにおいても、共振によるピーク・デ
ィップのない平坦な周波数特性を得ることが出来るスピ
ーカシステムを提供するものである。In view of the above problems, the present invention provides a speaker system that can obtain a flat frequency characteristic without a peak dip due to resonance even in a speaker system having a short horn or an acoustic tube.
課題を解決するための手段 この目的を達成するため、本発明のスピーカシステム
は、スピーカ振動板の前面に音波を導く音響管を配置
し、前記音響管の内部には前記スピーカ振動板を有する
低音用と高音用のスピーカユニットを各々少なくとも一
つ以上配置し、前記スピーカ振動板面より音響管の開口
部に向かって連続的に延長され、かつ少なくとも一つの
スリット有した仕切り板を設け、前記仕切り板と音響管
壁によって囲まれた空間に吸音材が配置されており、前
記吸音材の内壁および仕切り板により連続した平坦な音
導部を形成していることを特徴とする。Means for Solving the Problems In order to achieve this object, a speaker system according to the present invention has a sound tube for guiding sound waves arranged in front of a speaker diaphragm, and a bass having the speaker diaphragm inside the sound tube. At least one loudspeaker unit and one high-pitched loudspeaker unit are respectively disposed, and a partition plate having at least one slit is continuously extended from the speaker diaphragm surface toward the opening of the acoustic tube, and the partition is provided. A sound absorbing material is arranged in a space surrounded by the plate and the acoustic tube wall, and a continuous flat sound conducting portion is formed by the inner wall of the sound absorbing material and the partition plate.
音響管内部の仕切り板のスリット位置は、音響管の開口
部と、スピーカ振動板側で音響管長の３分の１の部分と
に配置されている。The slit position of the partition plate inside the acoustic tube is arranged at the opening of the acoustic tube and a portion of the speaker diaphragm side that is one third of the acoustic tube length.
音導管内部のスリットを有した仕切り板と音響管壁とで
囲まれた音導部の断面積は、スピーカ振動板直前では小
さく音響管の開口部に近づくにしたがって大きくなるか
または一定であるように構成している。The cross-sectional area of the sound conducting portion surrounded by the partition plate having the slit inside the sound conduit and the acoustic tube wall is small immediately before the speaker diaphragm and becomes larger or constant as it approaches the opening of the acoustic tube. Is configured.
作用 本発明は、振動板側よりL/3の部分と音響管の開口部に
おいて仕切り板にスリットを設け、吸音材を音響管側壁
と仕切り板との間に配置したことにより、粒子速度が小
さくなり、第２番目のピークをとることができ、また、
最大粒子速度を開口部に持つ第１番目のピークも同時に
とることができる。また、第３番目以降のピークも開口
部のスリットによってピークをとることができる。Effect The present invention provides a slit in the partition plate at the L / 3 portion and the opening of the acoustic tube from the diaphragm side, and the sound absorbing material is arranged between the side wall of the acoustic tube and the partition plate, so that the particle velocity is small. And can take the second peak,
The first peak with the maximum particle velocity at the opening can also be taken at the same time. Further, the peaks of the third and subsequent peaks can be taken by the slits in the opening.
さらに振動板前面に発生した音波は、振動板前面から開
口部まで導いている仕切り板により開口部まで通過でき
るため高域まで再生可能である。Further, the sound wave generated on the front surface of the diaphragm can be reproduced up to a high range because it can pass through the partition plate leading from the front surface of the diaphragm to the opening portion.
以上の効果により、ピーク・ディップがなく、平坦な音
圧周波数特性を高域まで実現できるものである。Due to the above effects, flat sound pressure frequency characteristics without peak dips can be realized up to high frequencies.
実施例 以下本発明の一実施例スピーカシステムについて、図面
を参照しながら説明する。Embodiments A speaker system according to an embodiment of the present invention will be described below with reference to the drawings.
第１図は、本発明の一実施例におけるスピーカシステム
の構造断面図を示すものである。第１図において、１は
高音用スピーカユニット、２は低音用スピーカユニッ
ト、３はバックキャビディ、４は高音用スピーカユニッ
ト１と低音用スピーカユニット２の振動板前面に発生し
た音波を導びく音響管、５は音響管４の内部に音導部が
設けられるよう配置され、音響管４の開口部分と、スピ
ーカ振動板前面から音響管長の３分の１の部分とにスリ
ットがある仕切り板、６は音響管３と仕切り板４とで囲
まれた部分に配された吸音材、７は音導部である。FIG. 1 is a structural sectional view of a speaker system according to an embodiment of the present invention. In FIG. 1, 1 is a high-pitched speaker unit, 2 is a low-pitched speaker unit, 3 is a back cavity, 4 is a sound that guides sound waves generated in front of the diaphragms of the high-pitched speaker unit 1 and the low-pitched speaker unit 2. The tubes 5 are arranged so that a sound guide portion is provided inside the acoustic tube 4, and a partition plate having a slit in the opening portion of the acoustic tube 4 and a portion from the front surface of the speaker diaphragm to one-third of the acoustic tube length, Reference numeral 6 is a sound absorbing material arranged in a portion surrounded by the acoustic tube 3 and the partition plate 4, and 7 is a sound guide portion.
以上のように構成されたスピーカシステムについて、以
下、その動作について説明する。高音用スピーカユニッ
ト１と低音用スピーカユニット２の振動板背面の音はキ
ャビティー３に閉じられているが、振動板前面に放射さ
れた音波は、音響管４を通して開口部まで導かれ放射さ
れている。しかし、開口部で生じる急激な音響インピー
ダンスの変化により、開口部まで導かれた音波の一部は
反射波となり振動板前面に帰ってこようとする。この反
射波を音響管内部に配置された吸音材６によって吸収
し、音響管内部に定在波が発生するのを防止するもので
ある。仕切り板５のスリットは、粒子速度が大きくなる
音響管４の開口部分と、スピーカ振動板前面から音響管
長の３分の１の部分とに設けられているため、定在波が
発生する周波数の音波だけを制動することが可能であ
り、吸音材によって吸音されやすい高域は吸音材６によ
って阻害されることなく開口部まで導かれるものであ
る。The operation of the speaker system configured as above will be described below. Sounds behind the diaphragms of the high-pitched speaker unit 1 and the low-pitched speaker unit 2 are closed in the cavity 3, but the sound waves emitted to the front surface of the diaphragm are guided to the opening through the acoustic tube 4 and are emitted. There is. However, due to the sudden change in acoustic impedance generated at the opening, part of the sound wave guided to the opening becomes a reflected wave and tries to return to the front surface of the diaphragm. This reflected wave is absorbed by the sound absorbing material 6 disposed inside the acoustic tube, and a standing wave is prevented from being generated inside the acoustic tube. Since the slits of the partition plate 5 are provided in the opening portion of the acoustic tube 4 where the particle velocity becomes large and in the portion of one-third of the acoustic tube length from the front surface of the speaker diaphragm, the frequency of the standing wave is increased. It is possible to brake only the sound wave, and the high frequency range that is easily absorbed by the sound absorbing material is guided to the opening without being disturbed by the sound absorbing material 6.
第２図は、ホーンや音響管付きのスピーカシステムの再
生音圧周波数特性を、本実施例と従来例を比較しながら
示している。従来例における特性Ｂは音響管内で定在波
が生じるため山谷の大きい特性となるが、本実施例のス
ピーカシステムの特性をＡに示すように、高域まで平坦
な再生音圧周波数特性が得られることがわかる。なお、
本実施例では、音響管内部の仕切り板４と吸音材５の内
壁にて構成される音導部が、スピーカ前面部では該音導
部の断面積が小さく、音響管開口部に近づくにしたがっ
て該音導部の断面積が大きくなるホーンを例にして説明
したが、このような条件を満たすスピーカシステムの一
部破断斜視図を第５図（ａ）（ｂ）に示す。また本発明
は、このような音響管の形状によらず、音導部の断面積
が一定であるホーンであっても、本実施例と同様の効果
が得られる。FIG. 2 shows reproduced sound pressure frequency characteristics of a speaker system with a horn and an acoustic tube while comparing this example with a conventional example. The characteristic B in the conventional example has large peaks and valleys because a standing wave is generated in the acoustic tube, but as shown in A of the characteristic of the speaker system of this embodiment, a flat reproduced sound pressure frequency characteristic is obtained up to a high range. You can see that In addition,
In the present embodiment, the sound conducting portion constituted by the partition plate 4 inside the acoustic tube and the inner wall of the sound absorbing material 5 has a small cross-sectional area of the sound conducting portion on the front surface of the speaker, and becomes closer to the acoustic tube opening. The horn in which the cross-sectional area of the sound guide portion is large has been described as an example. Partially cutaway perspective views of a speaker system satisfying such conditions are shown in FIGS. 5 (a) and 5 (b). Further, the present invention can obtain the same effect as that of the present embodiment even with a horn in which the cross-sectional area of the sound conducting portion is constant regardless of the shape of the acoustic tube.
発明の効果 以上のように本発明は音響管内部に低音用と高音用のス
ピーカユニットを少なくとも一つ以上配しているため再
生帯域の拡大が可能となり、さらに音響管やホーンの内
部にスリットをもった仕切り板を設け、仕切り板と音響
管の側壁の間に吸音材を配置した構成とすることによ
り、従来の音響管やホーンに見られた定在波による再生
音圧周波数特性のピークを抑えて平坦な音圧特性を有す
るスピーカシステムが実現できる。EFFECTS OF THE INVENTION As described above, according to the present invention, since at least one speaker unit for low sound and at least one speaker unit for high sound are arranged inside the sound tube, the reproduction band can be expanded, and further, a slit is formed inside the sound tube and the horn. By providing a partition plate with a sound absorbing material between the partition plate and the side wall of the acoustic tube, the peak of the reproduced sound pressure frequency characteristic due to the standing wave seen in conventional acoustic tubes and horns can be obtained. It is possible to realize a speaker system that suppresses and has a flat sound pressure characteristic.
また、仕切り板は少なくとも１つスリットを有して音響
管開口部に向かって配置されており、吸音材の内壁およ
び仕切り板により連続した平坦な音導部を形成している
ので、ホーン内を伝播する音波の進行を妨げることな
く、かつ特に高域成分の高圧レベルの低下を抑制しなが
ら、音圧のピークを抑えて平坦な音圧周波数特性を得る
ことができる。Further, since the partition plate has at least one slit and is arranged toward the opening of the acoustic tube, and the inner wall of the sound absorbing material and the partition plate form a continuous flat sound conducting portion, It is possible to suppress the peak of the sound pressure and obtain a flat sound pressure frequency characteristic without hindering the propagation of the propagating sound wave and particularly while suppressing the decrease of the high pressure level of the high frequency component.
第１図は本発明のスピーカシステムの一実施例における
構造断面図、第２図はスピーカシステムの音圧周波数特
性図、第３図は従来のスピーカシステムの構造断面図、
第４図は音響管の断面における粒子速度分布と音圧分布
を示す特性図、第５図は本発明のスピーカシステムの他
の実施例における構造断面図である。 １……高音用スピーカユニット、２……低音用スピーカ
ユニット、３……バックキャビティ、４……音響管、５
……仕切り板、６……吸音材、７……音導部、８……ホ
ーン、９……スピーカユニット。1 is a structural sectional view of an embodiment of the speaker system of the present invention, FIG. 2 is a sound pressure frequency characteristic diagram of the speaker system, and FIG. 3 is a structural sectional view of a conventional speaker system.
FIG. 4 is a characteristic view showing a particle velocity distribution and a sound pressure distribution in the cross section of the acoustic tube, and FIG. 5 is a structural cross section in another embodiment of the speaker system of the present invention. 1 ... High-pitched speaker unit, 2 ... Low-pitched speaker unit, 3 ... Back cavity, 4 ... Acoustic tube, 5
...... Partition plate, 6 ... Sound absorbing material, 7 ... Sound conducting part, 8 ... Horn, 9 ... Speaker unit.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭58−589（ＪＰ，Ｕ) 実開 昭60−186778（ＪＰ，Ｕ) 実開 昭50−118935（ＪＰ，Ｕ) 実公 昭58−25673（ＪＰ，Ｙ２) ─────────────────────────────────────────────────── ─── Continuation of front page (56) Bibliography Sho 58-589 (JP, U) Steady Sho 60-186778 (JP, U) Steady Sho 50-118935 (JP, U) Steal 58- 25673 (JP, Y2)
Claims (3)
を配置し、前記音響管の内部には前記スピーカ振動板を
有する低音用と高音用のスピーカユニットを各々少なく
とも一つ以上配置し、前記スピーカ振動板面より音響管
の開口部に向かって連続的に延長され、かつ少なくとも
一つのスリットを有した仕切り板を設け、前記仕切り板
と音響管壁によって囲まれた吸音材が配置されており、
前記吸音材の内壁および仕切り板により連続した平坦な
音導部を形成していることを特徴とするスピーカシステ
ム。1. An acoustic tube for guiding sound waves is arranged on the front surface of a speaker diaphragm, and at least one or more low-pitched and high-pitched speaker units having the speaker diaphragm are arranged inside the acoustic tube. A partition plate is provided that extends continuously from the speaker diaphragm surface toward the opening of the acoustic tube and has at least one slit, and a sound absorbing material surrounded by the partition plate and the acoustic tube wall is arranged. Cage,
A speaker system characterized in that a continuous flat sound conducting portion is formed by the inner wall of the sound absorbing material and the partition plate.
音響管の開口部と、スピーカ振動板側で音響管長の３分
の１の部分とに配置されていることを特徴とする請求項
１記載のスピーカシステム。2. The slit position of the partition plate inside the acoustic tube is
The speaker system according to claim 1, wherein the speaker system is arranged in an opening of the acoustic tube and a portion of the speaker diaphragm side that is one third of the acoustic tube length.
音響管壁とで囲まれた音導部の断面積が、スピーカ振動
板直前では小さく音響管の開口部に近づくにしたがって
大きくなることを特徴とする請求項１または請求項２記
載のスピーカシステム。3. The cross-sectional area of the sound conducting portion surrounded by the partition plate having the slit inside the sound conduit and the sound tube wall is small in front of the speaker diaphragm and increases as it approaches the opening of the sound tube. The speaker system according to claim 1 or 2, characterized in that:
Priority Applications (17)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63106355A JPH0775431B2 (en) | 1988-04-28 | 1988-04-28 | Speaker system |
| NZ225001A NZ225001A (en) | 1987-06-16 | 1988-06-13 | Loudspeaker: reflected sound waves absorbed |
| AU17673/88A AU597496B2 (en) | 1987-06-16 | 1988-06-14 | Speaker system |
| KR1019880007118A KR920001058B1 (en) | 1987-06-16 | 1988-06-14 | Speaker system |
| US07/206,377 US4893695A (en) | 1987-06-16 | 1988-06-14 | Speaker system |
| MYPI88000656A MY103304A (en) | 1987-06-16 | 1988-06-14 | Speaker system |
| DE3888730T DE3888730T2 (en) | 1987-06-16 | 1988-06-15 | Speaker system. |
| CA000569570A CA1327020C (en) | 1987-06-16 | 1988-06-15 | Speaker system |
| EP88109531A EP0295644B1 (en) | 1987-06-16 | 1988-06-15 | Speaker system |
| CN88104537A CN1016567B (en) | 1987-06-16 | 1988-06-16 | Speaker system |
| EP19890106833 EP0339425B1 (en) | 1988-04-28 | 1989-04-17 | Speaker system |
| ES89106833T ES2050178T3 (en) | 1988-04-28 | 1989-04-17 | SPEAKER SYSTEM. |
| ZA892873A ZA892873B (en) | 1988-04-28 | 1989-04-19 | Speaker system |
| AR89313740A AR241985A1 (en) | 1988-04-28 | 1989-04-24 | A loud-speaker device. |
| MX1581189A MX171080B (en) | 1988-04-28 | 1989-04-26 | HIGH-SPEAKER SYSTEM |
| DK204589A DK170195B1 (en) | 1988-04-28 | 1989-04-27 | Loudspeaker installation |
| BR898901979A BR8901979A (en) | 1988-04-28 | 1989-04-27 | SPEAKER SYSTEM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63106355A JPH0775431B2 (en) | 1988-04-28 | 1988-04-28 | Speaker system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01276997A JPH01276997A (en) | 1989-11-07 |
| JPH0775431B2 true JPH0775431B2 (en) | 1995-08-09 |
Family
ID=14431458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63106355A Expired - Lifetime JPH0775431B2 (en) | 1987-06-16 | 1988-04-28 | Speaker system |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0775431B2 (en) |
| AR (1) | AR241985A1 (en) |
| ZA (1) | ZA892873B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006237826A (en) * | 2005-02-23 | 2006-09-07 | Pioneer Electronic Corp | Speaker apparatus for planar display apparatus and planar display apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50118935U (en) * | 1974-03-12 | 1975-09-29 | ||
| JPS58589U (en) * | 1981-06-25 | 1983-01-05 | パイオニア株式会社 | speaker cabinet |
| JPS5825673U (en) * | 1981-08-13 | 1983-02-18 | 三菱電機株式会社 | engine ignition system |
| JPS60186778U (en) * | 1984-05-21 | 1985-12-11 | 三菱電機株式会社 | speaker system |
-
1988
- 1988-04-28 JP JP63106355A patent/JPH0775431B2/en not_active Expired - Lifetime
-
1989
- 1989-04-19 ZA ZA892873A patent/ZA892873B/en unknown
- 1989-04-24 AR AR89313740A patent/AR241985A1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| ZA892873B (en) | 1989-12-27 |
| JPH01276997A (en) | 1989-11-07 |
| AR241985A1 (en) | 1993-01-29 |
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