JPH1013982A - Speaker device - Google Patents
Speaker deviceInfo
- Publication number
- JPH1013982A JPH1013982A JP8165671A JP16567196A JPH1013982A JP H1013982 A JPH1013982 A JP H1013982A JP 8165671 A JP8165671 A JP 8165671A JP 16567196 A JP16567196 A JP 16567196A JP H1013982 A JPH1013982 A JP H1013982A
- Authority
- JP
- Japan
- Prior art keywords
- acoustic tube
- sound
- acoustic
- tube
- speaker device
- 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.)
- Pending
Links
Landscapes
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Abstract
(57)【要約】
【課題】 スピーカユニットの背面に音響管を設けたス
ピーカ装置に関し、優れた低音再生能力を有する小形の
スピーカ装置を提供することを目的とするものである。
【解決手段】 スピーカユニット７の背面に結合した音
響管５の経路の途中に制動材６を配設した構成とするこ
とにより、制動材６が音響抵抗として働くため音響管５
の共振周波数を上記音響管５の全長で決まる周波数より
低くすることができ、低音再生帯域の広い優れた性能の
スピーカ装置を提供できるものである。
(57) An object of the present invention is to provide a small loudspeaker device having an excellent bass reproduction capability with respect to a loudspeaker device having an acoustic tube provided on the back of a loudspeaker unit. SOLUTION: By providing a structure in which a damping material 6 is disposed in the middle of a path of an acoustic tube 5 coupled to a back surface of a speaker unit 7, the damping material 6 acts as an acoustic resistance, so that the acoustic tube 5 is provided.
Can be made lower than the frequency determined by the overall length of the acoustic tube 5, and a speaker device having a wide bass reproduction band and excellent performance can be provided.
Description
【０００１】[0001]
【発明の属する技術分野】本発明はスピーカユニットの
背面に音響管を設けたスピーカ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 speaker device provided with an acoustic tube on the back of a speaker unit.
【０００２】[0002]
【従来の技術】従来からスピーカ装置の低音域を拡大す
る技術の１つとして、スピーカユニットの背面に音響管
を結合したスピーカ装置がある。2. Description of the Related Art Conventionally, as one of techniques for expanding a bass range of a speaker device, there is a speaker device in which an acoustic tube is connected to the back of a speaker unit.
【０００３】このような従来の音響管を結合したスピー
カ装置について図３により説明する。[0003] A conventional speaker device having such a sound tube coupled thereto will be described with reference to FIG.
【０００４】図３は従来のスピーカ装置の断面図を示す
ものである。同図において１はキャビネット、２ａ，２
ｂ，２ｃ，２ｄ，２ｅはキャビネット１の前面板および
後面板に設けられた仕切り板、３はキャビネット１の前
面板の下部に設けられた開口部、４は前面板の上部に装
着されたスピーカユニットである。FIG. 3 is a sectional view of a conventional speaker device. In the figure, 1 is a cabinet, 2a, 2
Reference numerals b, 2c, 2d, and 2e denote partition plates provided on the front plate and the rear plate of the cabinet 1, reference numeral 3 denotes an opening provided below the front plate of the cabinet 1, and reference numeral 4 denotes a speaker mounted on the top of the front plate. Unit.
【０００５】以上のように構成された従来のスピーカ装
置について以下にその動作を説明する。キャビネット１
内に設けられた仕切り板２ａ，２ｂ，２ｃ，２ｄ，２ｅ
は音響管を構成するものであり、スピーカユニット４の
背面から出た音は、上記音響管を通りその開口部３から
放射される。[0005] The operation of the conventional loudspeaker device configured as described above will be described below. Cabinet 1
Partition plates 2a, 2b, 2c, 2d, 2e provided in
Is a sound tube, and the sound emitted from the back of the speaker unit 4 is radiated from the opening 3 through the sound tube.
【０００６】上記音響管はその全長で決まる特定の周波
数で共振を行い、音響管の全長をＬ、空気中の音速をＣ
とすると、共振周波数（ｆn）は、ｆn＝Ｃ／４Ｌ×（２
ｎ＋１）ここでｎ＝０，１，２，……ｎとなり、ｎ＝０
では音響管内に１／４波長がのって共振を生じ、音響管
の開口部３より音響的に増大された音が放射され、低音
再生限界付近での大幅な能率向上が図られるものであ
る。The above-mentioned acoustic tube resonates at a specific frequency determined by its total length, and the overall length of the acoustic tube is L, and the speed of sound in the air is C.
Then, the resonance frequency (f n ) becomes f n = C / 4L × (2
n + 1) where n = 0, 1, 2,... n, and n = 0
In this case, a 1/4 wavelength is set inside the acoustic tube to cause resonance, and acoustically increased sound is radiated from the opening 3 of the acoustic tube, thereby achieving a significant improvement in efficiency near the bass reproduction limit. .
【０００７】また、音響管に１／２波長がのる周波数で
はスピーカユニット４の前面から放射される音と、前面
からの音に対し本来逆位相となる音響管の開口部３から
放射されるスピーカユニット４の背面からの音は半波長
の位相遅延のため同位相となって加算され、音圧レベル
が増大するものである。At a frequency at which a half wavelength is applied to the sound tube, the sound radiated from the front surface of the speaker unit 4 is radiated from the opening 3 of the sound tube which is originally in phase opposite to the sound from the front surface. The sound from the back of the speaker unit 4 is added in the same phase due to a half-wave phase delay, and the sound pressure level increases.
【０００８】さらにｎ＝２になると、音響管内に３／４
波長がのり、ｎ＝０の場合と同様に音響管の開口部３よ
り音響的に増大された音が放射される。従って低音域に
おいて高能率なスピーカ装置を実現することができると
いうものであった。Further, when n = 2, 3/4 is set in the acoustic tube.
As the wavelength increases, an acoustically amplified sound is emitted from the opening 3 of the acoustic tube as in the case of n = 0. Therefore, a high-efficiency speaker device can be realized in a low sound range.
【０００９】[0009]
【発明が解決しようとする課題】しかしながら、上記の
ような従来の構成では、低音再生限界は音響管の全長Ｌ
により限定されるため、より低音域を再生するために
は、音響管の全長Ｌを長くする必要があり、スピーカ装
置が大型化するという課題があった。However, in the above-mentioned conventional configuration, the bass reproduction limit is limited to the total length L of the sound tube.
Therefore, in order to reproduce a lower sound range, it is necessary to lengthen the entire length L of the acoustic tube, and there is a problem that the speaker device becomes large.
【００１０】本発明は上記課題を解決し、低音域での再
生帯域を広げることができる高性能なスピーカ装置を提
供することを目的とするものである。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a high-performance speaker device capable of expanding a reproduction band in a low-frequency range.
【００１１】[0011]
【課題を解決するための手段】この課題を解決するため
に本発明のスピーカ装置は、一端にスピーカユニットを
結合し、このスピーカユニットの背面から連続的に延長
され、その他端を開口部として音場空間に開放した音響
管の経路の途中に音響抵抗となる制動材を配設した構成
としたものである。In order to solve this problem, a speaker device according to the present invention has a speaker unit connected to one end thereof, extends continuously from the back of the speaker unit, and has an opening at the other end. In this configuration, a damping material serving as an acoustic resistor is provided in the middle of the path of the acoustic tube opened to the space.
【００１２】この構成により、音響管の途中に配設した
制動材は音響抵抗として働き、この部分の空気の粒子速
度が制動材のない時に比べて遅くなり全体としての音響
管の共振点を変化させ見かけの長さより音響管が長くな
ったように働き、その結果共振周波数が低くなり低音域
での再生帯域を広げたスピーカ装置を提供できるもので
ある。According to this configuration, the damping member disposed in the middle of the sound tube acts as an acoustic resistance, and the particle velocity of air in this portion becomes slower than when there is no damping material, so that the resonance point of the sound tube as a whole changes. It is possible to provide a speaker device that acts as if the acoustic tube is longer than its apparent length, and as a result, the resonance frequency is lowered and the reproduction band in the low frequency range is widened.
【００１３】[0013]
【発明の実施の形態】本発明の請求項１記載の発明は、
一端にスピーカユニットを結合し、このスピーカユニッ
トの背面から連続的に延長されその他端を開口部として
音場空間に開放した音響管の経路の途中に音響抵抗とな
る制動材を配設したものであり、この音響抵抗となる制
動材によって空気の粒子速度がこのような制動材のない
時に比して遅くなり、音響管の長さが見かけより長くな
ったようになり、共振周波数を下げて、低音域での再生
帯域を広げることができるものである。BEST MODE FOR CARRYING OUT THE INVENTION
A speaker unit is connected to one end, and a damping material serving as an acoustic resistor is provided in the middle of a path of an acoustic tube which is continuously extended from the back of the speaker unit and opened to the sound field space with the other end as an opening. Yes, the damping material that becomes this acoustic resistance slows down the particle velocity of air compared to the case without such damping material, the length of the acoustic tube becomes longer than it seems, lowering the resonance frequency, It can expand the reproduction band in the low frequency range.
【００１４】以下、本発明の一実施の形態のスピーカ装
置について図１〜図２より説明する。Hereinafter, a speaker device according to an embodiment of the present invention will be described with reference to FIGS.
【００１５】図１は本発明の一実施の形態のスピーカ装
置の側断面図であり、図２は同再生音圧周波数特性図で
ある。FIG. 1 is a side sectional view of a speaker device according to an embodiment of the present invention, and FIG. 2 is a reproduction sound pressure frequency characteristic diagram.
【００１６】同図によると、５はコ字状に形成された音
響管、６は音響管５の経路の途中に配設したグラスファ
イバーよりなる制動材であり、全体として見ると、スピ
ーカ装置は、スピーカユニット７の背面に音響管５を結
合し、この音響管５の途中の音響抵抗として働く制動材
６から構成されている。According to FIG. 1, reference numeral 5 denotes an acoustic tube formed in a U-shape, and reference numeral 6 denotes a damping member made of glass fiber disposed in the middle of the path of the acoustic tube 5. The acoustic tube 5 is connected to the back surface of the speaker unit 7 and includes a damping material 6 acting as an acoustic resistor in the middle of the acoustic tube 5.
【００１７】以上のように構成されたスピーカ装置の動
作について説明する。スピーカユニット７の背面から音
が放射されると、制動材６は音響抵抗として働き空気の
粒子速度が遅くなる。The operation of the speaker device configured as described above will be described. When sound is radiated from the back of the speaker unit 7, the damping material 6 acts as acoustic resistance, and the particle velocity of the air is reduced.
【００１８】その結果音響管５の第１の共振周波数（Ｌ
＝１／４λに対応する周波数（Ｌは音響管長））がその
長さＬで決まる周波数より低くなり、音響管５の全長Ｌ
が見かけ上長くなったような動作をし、その結果、より
低音域の音が良好に再生されることとなり、図２の周波
数特性図の実線で示すように従来の制動材のないスピー
カ装置に比べ低音域まで再生でき優れた特性となる。As a result, the first resonance frequency (L
= 1 / 4λ (L is the length of the acoustic tube) becomes lower than the frequency determined by the length L, and the total length L of the acoustic tube 5
Operates as if it seemed to be longer, and as a result, the sound in the lower frequency range was reproduced well, and as shown by the solid line in the frequency characteristic diagram of FIG. Compared to the lower range, it has excellent characteristics.
【００１９】なお、本実施の形態では、制動材６として
グラスファイバーを用いたが、高分子発泡体あるいはセ
ラミック発泡体のような多孔質体や繊維状物質（不織
布、セラミックファイバー等）等、空気が透過可能で制
動作用があるものならば、その材料あるいは形状は適宜
選択することが可能であり、本実施の形態と同様の効果
が得られるものである。In this embodiment, glass fiber is used as the damping material 6. However, a porous material such as a polymer foam or a ceramic foam or a fibrous substance (nonwoven fabric, ceramic fiber, etc.) or the like is used. As long as it is transparent and has a braking action, its material or shape can be appropriately selected, and the same effects as those of the present embodiment can be obtained.
【００２０】さらに制動材６の配設する位置は音響管５
の経路の途中であればどの位置でもよく、１ヶ所に限ら
ず複数ヶ所でもよい。またその量は音響管５の断面積の
一部分あるいは全面をカバーする量で、得ようとする低
音特性に応じて適宜決定すれば良いものである。Further, the position where the damping material 6 is disposed is the sound tube 5.
Any position in the middle of the route may be used, and the present invention is not limited to one location and may be a plurality of locations. Further, the amount is an amount that covers a part or the whole of the cross-sectional area of the acoustic tube 5 and may be appropriately determined according to the bass characteristics to be obtained.
【００２１】[0021]
【発明の効果】以上のように本発明によるスピーカ装置
は、スピーカユニットの背面に音響管を結合し、音響管
の途中に制動材を配設して音響抵抗を生じさせることに
より音響管の共振周波数を、その音響管の長さＬで決ま
る周波数よりも低くすることができるため、従来の音響
管を用いたスピーカ装置に比べ短い全長の音響管で同じ
性能を実現できる利点があり、省スペース化も達成でき
るものである。As described above, in the speaker device according to the present invention, the acoustic tube is connected to the back of the speaker unit, and the damping material is provided in the middle of the acoustic tube to generate acoustic resistance. Since the frequency can be made lower than the frequency determined by the length L of the sound tube, there is an advantage that the same performance can be achieved with a shorter-length sound tube as compared with a speaker device using a conventional sound tube. Can also be achieved.
【図１】本発明の一実施の形態のスピーカ装置の断面図FIG. 1 is a sectional view of a speaker device according to an embodiment of the present invention.
【図２】同再生音圧周波数特性図FIG. 2 is a reproduction sound pressure frequency characteristic diagram.
【図３】従来のスピーカ装置の断面図FIG. 3 is a cross-sectional view of a conventional speaker device.
５ 音響管 ６ 制動材 ７ スピーカユニット 5 sound tube 6 braking material 7 speaker unit
Claims (1)
スピーカユニットの背面から連続的に延長されその他端
を開口部として音場空間に開放した音響管の経路の途中
に音響抵抗となる制動材を配設したスピーカ装置。1. A speaker unit having one end connected to a speaker unit, and a damping material serving as an acoustic resistance being provided in the middle of a path of an acoustic tube which is continuously extended from a back surface of the speaker unit and opened to a sound field space with the other end as an opening. The speaker device installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8165671A JPH1013982A (en) | 1996-06-26 | 1996-06-26 | Speaker device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8165671A JPH1013982A (en) | 1996-06-26 | 1996-06-26 | Speaker device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1013982A true JPH1013982A (en) | 1998-01-16 |
Family
ID=15816821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8165671A Pending JPH1013982A (en) | 1996-06-26 | 1996-06-26 | Speaker device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1013982A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008294996A (en) * | 2007-05-28 | 2008-12-04 | Panasonic Electric Works Co Ltd | Telephone device |
| US20230269527A1 (en) * | 2020-11-13 | 2023-08-24 | Panasonic Intellectual Property Corporation Of America | Audio device |
-
1996
- 1996-06-26 JP JP8165671A patent/JPH1013982A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008294996A (en) * | 2007-05-28 | 2008-12-04 | Panasonic Electric Works Co Ltd | Telephone device |
| US20230269527A1 (en) * | 2020-11-13 | 2023-08-24 | Panasonic Intellectual Property Corporation Of America | Audio device |
| US12513455B2 (en) * | 2020-11-13 | 2025-12-30 | Panasonic Intellectual Property Corporation Of America | Audio device |
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