JPH01135295A - Loudspeaker system - Google Patents
Loudspeaker systemInfo
- Publication number
- JPH01135295A JPH01135295A JP62294419A JP29441987A JPH01135295A JP H01135295 A JPH01135295 A JP H01135295A JP 62294419 A JP62294419 A JP 62294419A JP 29441987 A JP29441987 A JP 29441987A JP H01135295 A JPH01135295 A JP H01135295A
- Authority
- JP
- Japan
- Prior art keywords
- acoustic tube
- diaphragm
- sound
- opening part
- acoustic
- 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
- 239000011358 absorbing material Substances 0.000 claims abstract description 10
- 238000005192 partition Methods 0.000 claims description 13
- 238000013459 approach Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 241000257465 Echinoidea Species 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
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ルモのである。DETAILED DESCRIPTION OF THE INVENTION 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２１＼−
／
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 horn or acoustic tube is installed on the front part of the speaker diaphragm21\-
/ The method of guiding the sound waves generated from the diaphragm to the opening is as follows.
It has been widely used in the past because it has advantages such as a higher output sound pressure than when a horn or acoustic tube is not used, and the ability to transmit sound in a specific direction.
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 equipped with a horn or acoustic tube will be explained 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 shows a structural sectional view of the above 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 section.
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 with the horn and acoustic tube configured as described above will be explained 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
部を外部に放射させないよ３、Ｘ−。A horn 7 is placed on the front side of the speaker diaphragm, the area of which is small near the diaphragm and gradually increases in size as it approaches the opening, and on the back side of the speaker diaphragm, the area does not radiate to the outside. Yo3, X-.
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。Sea urchin 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, a flat reproduced sound pressure frequency characteristic can be obtained.
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・デイツプのある山谷の多
い特性となる。例えば第２図ハ、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
。Problems to be Solved by the Invention However, with the above configuration, if the horn length cannot be made long enough to be incorporated into equipment,
The reproduced sound pressure frequency characteristic has many peaks and dips. For example, FIG. 2C shows a reproduced sound pressure frequency characteristic diagram of a speaker system equipped with a horn or acoustic tube. The characteristics indicated by B in the figure are those of a conventional speaker system equipped with a horn or 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・デイプが現れる。As shown in Fig. 4, in an acoustic tube of length L, when the speed of sound is C, the frequency f-(2n-1)C/4L(n=1
．． 2,3. ), a resonance phenomenon occurs, and a peak/dip appears in the reproduced sound pressure frequency characteristics.
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。Incidentally, FIG. 4 shows the sound pressure distribution and particle velocity distribution in the case of n=2.
本発明は上記問題点に鑑み、短いホーンや音響管ヲ有す
るスピーカシステムにおいても、共振によるピーク・デ
イツ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 speaker system that can obtain flat frequency characteristics without peaks and dips due to resonance even in a speaker system having a short horn or acoustic tube.
問題点を解決するだめの手段
この目的を達成するだめ、本発明のスピーカシステムは
、ヌ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シ、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, the speaker system of the present invention has an acoustic tube that guides sound waves arranged in front of the Nupika diaphragm, and inside the acoustic tube, at the front part of the diaphragm. A partition plate that has a small area and increases in area as it approaches the opening, and has slits at the opening of the acoustic tube and at one-third of the acoustic tube length on the speaker diaphragm side. A wall is provided, and a sound absorbing material is placed between the partition plate and the side wall of the acoustic tube.
作 用
本発明は、振動板側よＩ）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υ、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６ へ−７
０部に持つ第１番日のピークも同時に取ることができる
。Function The present invention provides slits in the partition plate at the I) L/3 portion from the diaphragm side and at the open end of the acoustic tube, and arranges a sound absorbing material between the acoustic tube side wall and the partition plate. The second peak can be taken at υ, where the velocity is small, and the peak on the first day, which has a maximum particle velocity of 6 to 70 parts, can 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 third and subsequent peaks can also be taken by the slit 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シ板により開口部捷で通過でき
るため高域まで再生可能である。Furthermore, the sound waves generated on the front surface of the diaphragm can be reproduced up to high frequencies because they can pass through the opening by the partition plate that guides them from the front surface of the diaphragm to the opening.
以上の効果により、ピーク・デイツプがなく、平坦な音
圧周波数特性を高域１で得ることができるものである。As a result of the above effects, it is possible to obtain a flat sound pressure frequency characteristic in the high range 1 without peaks and 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 Hereinafter, examples of the present invention will be described 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
ヌビーカユニット、２はパックキャビティ、３はヌピー
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６７、−１
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 shows a structural sectional view of a speaker system according to an embodiment of the present invention. In FIG. 1, 1 is a Nupika unit, 2 is a pack cavity, 3 is an acoustic tube that guides the sound waves generated on the front surface of the diaphragm of the Nupika unit 1, and 4 is a sound path section provided inside the acoustic tube 3. from the opening of the acoustic tube 3 and the front of the speaker diaphragm,
Acoustic tube 67, -1 A partition plate with a slit in one third of its length, 5 is a sound absorbing material placed in the area surrounded by the acoustic tube 3 and partition plate 4, 6 is a sound path part be.
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。ヌピーカユニット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。The operation of the speaker system configured as described above will be described below. Although the sound behind the diaphragm of the Nupica unit 1 is closed in the cavity 2, the sound waves radiated to the front of the diaphragm are guided to the opening through the acoustic tube 3 and radiated.
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
シ、振動板面に帰ってこようとする。However, due to the sudden change in acoustic impedance that occurs at the opening, a portion of the sound waves that have been guided to the opening become reflected waves and attempt to return to the diaphragm surface.
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、仕切シ板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
であシ、他の音波は吸音材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。This reflected wave is absorbed by the sound absorbing material 5 placed inside the acoustic tube to prevent standing waves from being generated inside the acoustic tube. In addition, since the slits in the partition plate 4 are provided at the opening of the acoustic tube 3 where the particle velocity increases and at one-third of the acoustic tube length from the front of the speaker diaphragm, the frequency with a peak It is possible to capture only the sound waves of 1, and other sound waves are guided to the opening without being obstructed by the sound absorbing material 6.
７へ−７
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
が生じるだ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。7-7 FIG. 2 shows the reproduced sound pressure frequency characteristics of a speaker system equipped with a horn or acoustic tube, comparing the present embodiment and a conventional example. Characteristic B in the conventional example is a characteristic with large peaks and troughs due to the generation of standing waves in the acoustic tube, but as shown in A, the characteristic of the speaker system of this embodiment is a flat reproduced sound pressure frequency characteristic up to the high range. I know that it will happen.
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
トをもった仕切シ板と、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・デイツ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, the present invention has a structure in which a partition plate with slits is provided inside the acoustic tube or horn, and a sound absorbing material is arranged between the partition plate and the side wall of the acoustic tube. This eliminates the peaks and dips in reproduced sound pressure frequency characteristics caused by standing waves found in acoustic tubes and horns, and allows flat characteristics to be obtained up to high frequency ranges.
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・・・・・・パッ
クキャビティ、３・・・・・・音響管、４・・・・・・
仕切シ板、５・・・・・・吸音材、６・・・・・・音導
部、７・・・・・・ホーン、８・・・・・・音導部。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名／
−一一スＬ０−カニニット
４−一一ス士切 り４叉
第１図
第２図
Ｍ 沢 教 ＬＨｚノFIG. 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 particle velocity distribution and sound pressure distribution in the cross section of the acoustic tube. 1...Speaker unit, 2...Pack cavity, 3...Acoustic tube, 4...
Partition plate, 5...Sound absorbing material, 6...Sound guide section, 7...Horn, 8...Sound guide section. Name of agent: Patent attorney Toshio Nakao and 1 other person/
- 11th L0 - Crab knit 4 - 11th Shikiri 4-prong Figure 1 Figure 2 M Sawa Kyori LHz -
Claims (1)
、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。An acoustic tube that guides sound waves is placed in front of the speaker diaphragm, and inside the acoustic tube, the area is small at the front of the diaphragm and becomes larger as it approaches the opening. The wall is constituted by a partition plate having a slit at the opening part of the speaker diaphragm and at one-third of the length of the acoustic tube on the side of the speaker diaphragm, and a sound absorbing material is arranged between the partition plate and the side wall of the acoustic tube. A speaker system characterized by:
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 |
| KR1019880007118A KR920001058B1 (en) | 1987-06-16 | 1988-06-14 | Speaker system |
| MYPI88000656A MY103304A (en) | 1987-06-16 | 1988-06-14 | Speaker system |
| US07/206,377 US4893695A (en) | 1987-06-16 | 1988-06-14 | Speaker system |
| AU17673/88A AU597496B2 (en) | 1987-06-16 | 1988-06-14 | Speaker system |
| EP88109531A EP0295644B1 (en) | 1987-06-16 | 1988-06-15 | Speaker system |
| DE3888730T DE3888730T2 (en) | 1987-06-16 | 1988-06-15 | Speaker system. |
| CA000569570A CA1327020C (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 true JPH01135295A (en) | 1989-05-26 |
| JPH0834644B2 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) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991019406A1 (en) * | 1990-05-25 | 1991-12-12 | Mitsubishi Denki Kabushiki Kaisha | Speaker system |
| JPH04160999A (en) * | 1990-10-25 | 1992-06-04 | Sharp Corp | Speaker system |
| JPH04369997A (en) * | 1991-06-19 | 1992-12-22 | Mitsubishi Electric Corp | Speaker system |
| US5675131A (en) * | 1993-12-16 | 1997-10-07 | Kabushiki Kaisha Toshiba | Speaker system and the same for television sets |
| US5710394A (en) * | 1994-08-30 | 1998-01-20 | Kabushiki Kaisha Toshiba | Television set speaker system |
| US6981570B2 (en) * | 2002-05-09 | 2006-01-03 | Dalbec Richard H | Loudspeaker system with common low and high frequency horn mounting |
| JP2013527719A (en) * | 2010-05-28 | 2013-06-27 | ヘルト フランク | A speaker device having a surround type funnel-shaped sound outlet opening |
-
1987
- 1987-11-20 JP JP62294419A patent/JPH0834644B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991019406A1 (en) * | 1990-05-25 | 1991-12-12 | Mitsubishi Denki Kabushiki Kaisha | Speaker system |
| JPH04160999A (en) * | 1990-10-25 | 1992-06-04 | Sharp Corp | Speaker system |
| JPH04369997A (en) * | 1991-06-19 | 1992-12-22 | Mitsubishi Electric Corp | Speaker system |
| US5675131A (en) * | 1993-12-16 | 1997-10-07 | Kabushiki Kaisha Toshiba | Speaker system and the same for television sets |
| US5710394A (en) * | 1994-08-30 | 1998-01-20 | Kabushiki Kaisha Toshiba | Television set speaker system |
| US6981570B2 (en) * | 2002-05-09 | 2006-01-03 | Dalbec Richard H | Loudspeaker system with common low and high frequency horn mounting |
| JP2013527719A (en) * | 2010-05-28 | 2013-06-27 | ヘルト フランク | A speaker device having a surround type funnel-shaped sound outlet opening |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0834644B2 (en) | 1996-03-29 |
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