JPH0834644B2 - Speaker system - Google Patents
Speaker systemInfo
- Publication number
- JPH0834644B2 JPH0834644B2 JP62294419A JP29441987A JPH0834644B2 JP H0834644 B2 JPH0834644 B2 JP H0834644B2 JP 62294419 A JP62294419 A JP 62294419A JP 29441987 A JP29441987 A JP 29441987A JP H0834644 B2 JPH0834644 B2 JP H0834644B2
- Authority
- JP
- Japan
- Prior art keywords
- acoustic tube
- speaker
- sound
- diaphragm
- 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
Landscapes
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
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、従来のハーンや音響管の
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 with a horn or 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、１はスピーカユニット、２はバック
キャビティ、７はホーン、８は音導部である。In FIG. 3, 1 is a speaker unit, 2 is a back cavity, 7 is a horn, and 8 is a sound guide.
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その動作を説明する。The operation of the speaker system having the horn and the acoustic tube configured as described above will be described below.
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７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ティ２を
配置している。ホーン７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、再生音圧周波数特性は平
坦な特性が得られる。A horn 7 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 is not radiated to the outside. Thus, the back cavity 2 is arranged. If the length of the horn 7 is sufficiently longer than the wavelength of the reproduction band to be reproduced, the reproduced sound pressure frequency characteristic is flat.
発明が解決しようとする問題点 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、再生音圧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-described configuration, when the horn length cannot be made sufficiently long to be incorporated in a device, the reproduced sound pressure frequency characteristics have many peaks and dips. Becomes 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 a sound tube having a length L, 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-mentioned problems, the present invention provides a peak system due to resonance even in a speaker system having a short horn or acoustic tube.
A speaker system capable of obtaining a flat frequency characteristic without dips.
問題点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、振動板前面部では面積が小さ
く、開口部に近づくにしたがって面積が大きくなるよう
に、かつ、音響管の開口部分と、スピーカ振動板側で、
音響管長の３分の１の部分とにスリットがあるような仕
切り板で壁が設けられており、前記仕切り板と音響管側
壁の間に吸音材が配置された構成となっている。Means for Solving the Problems In order to achieve this object, a speaker system of the present invention has an acoustic tube that guides sound waves disposed in front of a speaker diaphragm, and inside the acoustic tube, a diaphragm front part is provided. The area is small, so that the area increases as it approaches the opening, and at the opening of the acoustic tube and the speaker diaphragm side,
The wall is provided by a partition plate having a slit in a portion of one-third of the acoustic tube length, and a sound absorbing material is arranged between the partition plate and the acoustic tube side wall.
作用 本発明は、振動板側よりL/3の部分と音響管の開口端
において仕切り板にスリットを設け、吸音材を音響管側
壁としき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
時に取ることができる。Effect The present invention provides a slit in the partition plate at the L / 3 portion from the diaphragm side and the opening end of the acoustic tube, and the sound absorbing material is arranged between the acoustic tube sidewall and the cutoff plate, so that the particle velocity is small. Therefore, the second peak can be taken, and the first peak having the maximum particle velocity at the opening can also be taken at the same time.
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。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得ることができるものであ
る。With the above effects, it is possible to obtain a flat sound pressure frequency characteristic in the high frequency range without peak dips.
実 施 例 以下本発明の実施例について、図面を参照しながら説
明する。EXAMPLES Examples 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
はスピーカユニット、２はバックキャビティ、３はスピ
ーカユニット１の振動板前面に発生した音波を導く音響
管、４は音響管３の内部に音道部が設けられるよう配置
され、音響管３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部分とにスリットがある仕切り
板、５は音響管３と仕切り板４とで囲まれた部分に入れ
られている吸音材、６は音道部である。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 speaker unit, 2 is a back cavity, 3 is an acoustic tube for guiding sound waves generated on the front surface of the diaphragm of the speaker unit 1, and 4 is arranged so that a sound path portion is provided inside the acoustic tube 3, and an opening of the acoustic tube 3 is provided. The partition plate having a slit in the portion and from the front surface of the speaker diaphragm to the one-third portion of the acoustic tube length, 5 is a sound absorbing material put in a portion surrounded by the acoustic tube 3 and the partition plate 4, and 6 is It is the sound part.
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。スピーカユニット１の
振動板背面の音はキャビティ２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３を通して開口部
まで導かれ放射される。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５に
よって音波を吸収し、音響管内部に定在波が発生するの
を防ぐものである。また、仕切り板４のスリットは、粒
子速度が大きくなる音響管３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、ピークをもつ周波数の音波だけをとること
が可能であり、他の音波は吸音材５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。Regarding the speaker system configured as described above,
The operation will be described below. The sound on the back surface of the diaphragm of the speaker unit 1 is closed in the cavity 2, but the sound wave radiated on the front surface of the diaphragm is guided to the opening through the acoustic tube 3 and radiated. However, due to the sudden change in acoustic impedance generated at the opening, a part of the sound wave guided to the opening becomes a reflected wave and tries to return to the diaphragm surface. The reflected wave is absorbed by the sound absorbing material 5 arranged inside the acoustic tube to prevent the standing wave from being generated inside the acoustic tube. Further, since the slits of the partition plate 4 are provided in the opening portion of the acoustic tube 3 where the particle velocity becomes large and in the portion from the front surface of the speaker diaphragm to one-third of the acoustic tube length, Only sound waves can be taken, and other sound waves are guided to the opening without being blocked by the sound absorbing material 5.
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。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
発明の効果 以上のように本発明は、音響管やホーンの内部にスリ
ットをもった仕切り板と、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・ディップを生じさせなくし、高い周波数領域
まで平坦な特性を得ることが出来るものである。EFFECTS OF THE INVENTION As described above, according to the present invention, the partition plate having the slit inside the acoustic tube or the horn, and the structure in which the sound absorbing material is arranged between the partition plate and the side wall of the acoustic tube are provided. It is possible to obtain a flat characteristic up to a high frequency region without causing a peak dip in the reproduced sound pressure frequency characteristic due to a standing wave seen in a tube or a horn.
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
を示す特性図である。 １……スピーカユニット、２……バックキャビティ、３
……音響管、４……仕切り板、５……吸音材、６……音
導部、７……ホーン、８……音導部。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 diagram showing a particle velocity distribution and a sound pressure distribution in the cross section of the acoustic tube. 1 ... Speaker unit, 2 ... Back cavity, 3
...... Acoustic tube, 4 ... Partition plate, 5 ... Sound absorbing material, 6 ... Sound guide part, 7 ... Horn, 8 ... Sound guide part.
フロントページの続き (56)参考文献 特開 昭60−20699（ＪＰ，Ａ) 特開 昭60−47595（ＪＰ，Ａ) 特開 昭49−134312（ＪＰ，Ａ)Continuation of the front page (56) Reference JP-A-60-20699 (JP, A) JP-A-60-47595 (JP, A) JP-A-49-134312 (JP, A)
Claims (1)
管を配置し、前記音響管の内部に、振動板前面部では面
積が小さく、開口部に近づくにしたがって面積が大きく
なるように、かつ、前記音響管の開口部分と、前記スピ
ーカ振動板側で、音響管長の３分の１の部分とにスリッ
トがあるような仕切り板で壁を構成し、前記仕切り板と
音響管側壁の間に吸音材を配置した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 the inside of the acoustic tube is such that the area of the diaphragm front surface is small, and the area increases as it approaches the opening. Moreover, a wall is formed by a partition plate having a slit in the opening portion of the acoustic tube and a portion of the speaker diaphragm side that is one-third of the acoustic tube length, and between the partition plate and the acoustic tube sidewall. A speaker system in which a sound absorbing material is arranged in the speaker.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62294419A JPH0834644B2 (en) | 1987-11-20 | 1987-11-20 | 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 |
| MYPI88000656A MY103304A (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 |
| CA000569570A CA1327020C (en) | 1987-06-16 | 1988-06-15 | Speaker system |
| EP88109531A EP0295644B1 (en) | 1987-06-16 | 1988-06-15 | Speaker system |
| DE3888730T DE3888730T2 (en) | 1987-06-16 | 1988-06-15 | Speaker system. |
| CN88104537A CN1016567B (en) | 1987-06-16 | 1988-06-16 | Speaker system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62294419A JPH0834644B2 (en) | 1987-11-20 | 1987-11-20 | Speaker system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01135295A JPH01135295A (en) | 1989-05-26 |
| JPH0834644B2 true JPH0834644B2 (en) | 1996-03-29 |
Family
ID=17807512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62294419A Expired - Lifetime JPH0834644B2 (en) | 1987-06-16 | 1987-11-20 | Speaker system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0834644B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991019406A1 (en) * | 1990-05-25 | 1991-12-12 | Mitsubishi Denki Kabushiki Kaisha | Speaker system |
| JP2580383B2 (en) * | 1990-10-25 | 1997-02-12 | シャープ株式会社 | Speaker system |
| JP2582958B2 (en) * | 1991-06-19 | 1997-02-19 | 三菱電機株式会社 | Speaker system |
| DE69431391T2 (en) * | 1993-12-16 | 2003-05-15 | Kabushiki Kaisha Toshiba, Kawasaki | Speaker system for television sets |
| JP3449571B2 (en) * | 1994-08-30 | 2003-09-22 | 株式会社東芝 | TV set speaker system |
| US6981570B2 (en) * | 2002-05-09 | 2006-01-03 | Dalbec Richard H | Loudspeaker system with common low and high frequency horn mounting |
| DE102010021879A1 (en) * | 2010-05-28 | 2011-12-01 | Frank Held | Loudspeaker device with circumferential, funnel-shaped sound outlet opening |
-
1987
- 1987-11-20 JP JP62294419A patent/JPH0834644B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01135295A (en) | 1989-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR920001058B1 (en) | Speaker system | |
| US7623670B2 (en) | Waveguide electroacoustical transducing | |
| US4381831A (en) | High frequency horn | |
| US4126204A (en) | Speaker system | |
| US5103482A (en) | Apparatus and method for reproducing high fidelity sound | |
| JPH0410899A (en) | Loud speaker device | |
| JPH0834644B2 (en) | Speaker system | |
| US3186509A (en) | High fidelity loudspeaker system | |
| EP0339425B1 (en) | Speaker system | |
| JP3267999B2 (en) | Speaker system | |
| KR20010083946A (en) | Loudspeakers Comprising a Phase Uncorrelated Diffuse Sound Source | |
| JP2580383B2 (en) | Speaker system | |
| JPH0775432B2 (en) | Speaker system | |
| JP2653377B2 (en) | Speaker system | |
| JPH06103959B2 (en) | Speaker system | |
| JPH0775431B2 (en) | Speaker system | |
| JP2535634B2 (en) | Speaker system | |
| JPH05137188A (en) | Speaker system | |
| JP2882032B2 (en) | Speaker system | |
| JP3268028B2 (en) | Speaker system | |
| JPH0728461B2 (en) | Speaker device | |
| JPH05236583A (en) | Speaker system | |
| JPH03192898A (en) | Speaker system | |
| JPH05344579A (en) | Speaker system and television receiver using the speaker system | |
| JPH04369997A (en) | Speaker system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080329 Year of fee payment: 12 |