JPH0713340Y2 - Speaker cabinet - Google Patents
Speaker cabinetInfo
- Publication number
- JPH0713340Y2 JPH0713340Y2 JP1988020112U JP2011288U JPH0713340Y2 JP H0713340 Y2 JPH0713340 Y2 JP H0713340Y2 JP 1988020112 U JP1988020112 U JP 1988020112U JP 2011288 U JP2011288 U JP 2011288U JP H0713340 Y2 JPH0713340 Y2 JP H0713340Y2
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- resonance tube
- opening
- resonance
- frequency
- 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
- Details Of Audible-Bandwidth Transducers (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本案はスピーカシステムの性能改善に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to performance improvement of a speaker system.
（従来の技術） バスレフ型スピーカシステムにおいては、スピーカキャ
ビネット内にダクトと言われる共鳴管を設け、キャビネ
ットの壁面にポートと言われる開口部を設け、低域の音
圧を高めることが行なわれている。このダクトは、その
軸がスピーカの振動の軸と一致する場合と、スピーカキ
ャビネットの設計の都合により一致させることができ
ず、双方の軸が例えば90°の角度で交叉することがあ
る。第２図はその一例であって、容器１の前面のバッフ
ル板３にスピーカ２を固定し、その底面４に共鳴管５を
設け、スピーカ２の背面から放射される音のうち、特定
の低い周波数を共鳴管を介して位相反転させ、それをス
ピーカキャビネットの外部に放射させている。底面４か
らスピーカ２までの距離は、底面４から開口部５の先端
までの長さより大きい。(Prior Art) In a bass reflex type speaker system, a resonance tube called a duct is provided in a speaker cabinet, and an opening called a port is provided on a wall surface of the cabinet to enhance sound pressure in a low frequency range. There is. This duct cannot be matched when its axis is aligned with the axis of vibration of the speaker or due to the design of the speaker cabinet, and both axes may intersect at an angle of 90 °, for example. FIG. 2 is an example thereof, in which the speaker 2 is fixed to the baffle plate 3 on the front surface of the container 1, the resonance tube 5 is provided on the bottom surface 4 thereof, and a specific low level of the sound radiated from the back surface of the speaker 2 is provided. The frequency is phase-inverted via a resonance tube and radiated outside the speaker cabinet. The distance from the bottom surface 4 to the speaker 2 is larger than the length from the bottom surface 4 to the tip of the opening 5.
ところで、上述のようなスピーカシステムによると、共
鳴管から放射される音は、原理的には、この共鳴管の共
振周波数を中心とし、その前後に裾を有するものである
が、実際には、この共振周波数より高い部分においても
数個所の激しいピークが現われ、矢印のように共鳴管を
伝わって放射されていた。この帯域における高い周波数
の音は、必らずしも位相が合っていると限らず、スピー
カの前方空間で正規の音と干渉して、中音域に音の濁り
を生じたり、周波数特性に小さなピークやディップを生
ずることがあった。このため、従来は第３図のように、
共鳴管５のスピーカキャビネット内の開口部に折り曲げ
部６を設け、音を矢印のように反射させ、共鳴管５の共
鳴周波数より高くピークを生じる帯域の周波数が、共鳴
管５の内部に進入することを防止していた。By the way, according to the speaker system as described above, the sound radiated from the resonance tube is, in principle, centered at the resonance frequency of the resonance tube and has skirts before and after it, but in reality, Even at a portion higher than this resonance frequency, several intense peaks appeared and were radiated through the resonance tube as shown by the arrow. Sounds of high frequency in this band do not necessarily have to be in phase, and they interfere with regular sound in the space in front of the speaker, causing muddy sound in the middle frequency range and small frequency characteristics. Occasionally peaks and dips occurred. Therefore, conventionally, as shown in FIG.
A bent portion 6 is provided in the opening of the resonance tube 5 in the speaker cabinet to reflect sound as shown by an arrow, and a frequency of a band having a peak higher than the resonance frequency of the resonance tube 5 enters the resonance tube 5. Was preventing that.
（考案が解決しようとする課題） 第３図のような折り曲げ部６を設けると共鳴管の製作費
が上昇する欠点があった。(Problems to be solved by the invention) When the bent portion 6 as shown in FIG. 3 is provided, the manufacturing cost of the resonance tube is increased.
（課題を解決するための手段） 折り曲げ部６が無くても、共鳴周波数より高くピークを
生じる帯域の周波数が共鳴管内に直接侵入しないよう
に、共鳴管壁の長さをスピーカに近い方がスピーカから
遠い方より大きくした。(Means for Solving the Problem) Even if the bent portion 6 is not provided, the length of the resonance tube wall is closer to the speaker so that the frequency of the band having a peak higher than the resonance frequency does not directly enter the resonance tube. Greater than the one far from.
（作用） 結果として、共鳴管の開口部は斜めに切り取られ、然も
スピーカに近い方の共鳴管壁が高いから、共鳴管の共振
周波数より高くピーク、ディップを生じる周波数帯域の
信号がスピーカから背面に放射されても、直接共鳴管よ
り放射されることがなく、中音域に音の濁りや、周波数
特性に小さなピークやディップを生ずることがない。(Operation) As a result, the opening of the resonance tube is cut off diagonally, and since the resonance tube wall nearer to the speaker is still high, the signal in the frequency band causing peaks and dips higher than the resonance frequency of the resonance tube is output from the speaker. Even if it is radiated to the back surface, it is not directly radiated from the resonance tube, and muddy sound in the middle frequency range and small peaks or dips in the frequency characteristic do not occur.
（実施例） 第１図は、本発明の一実施例の断面図である。容器１の
前面のバッフル板３には、スピーカ２が前面のスピーカ
端縁部によって固定されており、底面４には共鳴管５
が、底面４に対して直角に取り付けられている。この共
鳴管５のスピーカ２に近い方の共鳴管壁の長さl1は、遠
い方の共鳴管壁の長さl2より、距離に従って逐次大きく
されている。また、底面４からスピーカ２の振動の軸Ｙ
−Ｙ′までの距離をｄとすると、ｄ＞l1となっている。
すなわち、共鳴管５に形成されるl1の上端とl2の上端を
結ぶ斜面が、スピーカの端縁部とスピーカに最も近い共
鳴管壁の先端（l1の上端）を結ぶ延長線を越えないよう
にされている。(Embodiment) FIG. 1 is a sectional view of an embodiment of the present invention. A speaker 2 is fixed to a baffle plate 3 on the front surface of the container 1 by a front edge of the speaker, and a resonance tube 5 is attached to a bottom surface 4.
Are attached at a right angle to the bottom surface 4. The length l 1 of the resonance tube wall closer to the speaker 2 of the resonance tube 5 is successively made larger according to the distance than the length l 2 of the resonance tube wall farther from the speaker 2. In addition, the axis Y of the vibration of the speaker 2 from the bottom surface 4
If the distance to the -Y 'and d, and has a d> l 1.
That is, the slope connecting the upper end of l 1 and the upper end of l 2 formed on the resonance tube 5 exceeds the extension line connecting the edge of the speaker and the tip of the resonance tube wall closest to the speaker (the upper end of l 1 ). It is supposed not to.
従って、スピーカ２の背面に放射される共鳴管５の共振
周波数より高くピーク、ディップを生じる帯域の周波数
の音は、矢印のように共鳴管壁で阻止され、共鳴管５の
内部に直接進入することがない。容器１の壁面で反射し
て共鳴管５に進入することはあるが、反射により減衰す
るので支障は少ない。Therefore, the sound of the frequency in the band that causes a peak and a dip higher than the resonance frequency of the resonance tube 5 radiated to the back surface of the speaker 2 is blocked by the resonance tube wall as shown by the arrow and directly enters the inside of the resonance tube 5. Never. Although it may be reflected by the wall surface of the container 1 and enter the resonance tube 5, it is attenuated by the reflection, so there is little trouble.
（考案の効果） 以上のように、本案によれば、共鳴管の共振周波数より
高くピーク、ディップの生じる帯域のオーディオ信号が
スピーカに入力されても、それらは共鳴管より直接放射
されることはなく、再生音の中音域における音の濁り
や、周波数特性に生じる不所望のピークやディップを防
止することができる。(Effect of the Invention) As described above, according to the present invention, even if an audio signal in a band having a peak and a dip higher than the resonance frequency of the resonance tube is input to the speaker, they are not directly radiated from the resonance tube. Therefore, it is possible to prevent the sound from becoming muddy in the midrange of the reproduced sound and to prevent undesired peaks and dips in the frequency characteristics.
第１図は本案の一実施例の断面図、第２図及び第３図は
従来の例の断面図である。 ２…スピーカ、３…共鳴管FIG. 1 is a sectional view of an embodiment of the present invention, and FIGS. 2 and 3 are sectional views of a conventional example. 2 ... speaker, 3 ... resonance tube
Claims (1)
バッフル板に固定されたスピーカと、バッフル板と直交
する容器の壁面の一部に一方の開口部を固定され他方の
開口部をスピーカの後方に有する共鳴管とを備え、該共
鳴管の固定された開口部から他方の開口部までの共鳴管
壁の長さはスピーカに近い方がスピーカから遠い方より
大であり、かつスピーカに最も近い共鳴管壁の先端のス
ピーカの振動の軸に対する座標はスピーカの端縁部のス
ピーカの振動の軸に対する座標より大であり、共鳴管の
開口部に形成される斜面はスピーカの端縁部とスピーカ
に最も近い共鳴管壁の先端を結ぶ延長線を越えないよう
にされ、スピーカからの直接波が共鳴管内に進入しない
ようにしたスピーカキャビネット。1. A container and a baffle plate provided on one surface thereof,
A speaker fixed to the baffle plate and a resonance tube having one opening fixed to a part of the wall surface of the container orthogonal to the baffle plate and having the other opening behind the speaker are provided. The length of the resonance tube wall from one opening to the other opening is greater near the speaker than far from the speaker, and the coordinates of the tip of the resonance tube wall closest to the speaker with respect to the vibration axis of the speaker are The slope of the speaker edge is larger than the coordinate of the speaker vibration axis, and the slope formed at the opening of the resonance tube exceeds the extension line connecting the speaker edge and the tip of the resonance tube wall closest to the speaker. The speaker cabinet is designed so that it does not enter the resonance tube and the direct wave from the speaker does not enter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988020112U JPH0713340Y2 (en) | 1988-02-18 | 1988-02-18 | Speaker cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988020112U JPH0713340Y2 (en) | 1988-02-18 | 1988-02-18 | Speaker cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01124793U JPH01124793U (en) | 1989-08-24 |
| JPH0713340Y2 true JPH0713340Y2 (en) | 1995-03-29 |
Family
ID=31236207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988020112U Expired - Lifetime JPH0713340Y2 (en) | 1988-02-18 | 1988-02-18 | Speaker cabinet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0713340Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5623961Y2 (en) * | 1976-02-05 | 1981-06-05 |
-
1988
- 1988-02-18 JP JP1988020112U patent/JPH0713340Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01124793U (en) | 1989-08-24 |
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