JPS5845234B2 - coaxial speaker - Google Patents
coaxial speakerInfo
- Publication number
- JPS5845234B2 JPS5845234B2 JP4814077A JP4814077A JPS5845234B2 JP S5845234 B2 JPS5845234 B2 JP S5845234B2 JP 4814077 A JP4814077 A JP 4814077A JP 4814077 A JP4814077 A JP 4814077A JP S5845234 B2 JPS5845234 B2 JP S5845234B2
- Authority
- JP
- Japan
- Prior art keywords
- speaker
- diaphragm
- bass
- coaxial
- sound
- 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
Links
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
Description
【発明の詳細な説明】 この発明は同軸形スピーカの改良に関するものである。[Detailed description of the invention] This invention relates to improvements in coaxial speakers.
一般に、スピーカシステムには1個のスピーカユニット
で再生帯域をカバーするフルレンジタイプのシステムと
、再生帯域をいくつかに分けてそれぞれに専用のスピー
カを用いるマルチウェイタイブのものがある。In general, speaker systems include full-range type systems in which a single speaker unit covers the reproduction band, and multi-way type systems in which the reproduction band is divided into several parts and each uses a dedicated speaker.
前者は古くから用いられているタイプであるが、1個の
スピーカで広い再生帯域をカバーすることは技術的に困
難である。The former type has been used for a long time, but it is technically difficult to cover a wide reproduction band with one speaker.
このため、高忠実度再生を目的とするスピーカシステム
には後者のタイプがよく用いられる。For this reason, the latter type is often used in speaker systems aimed at high-fidelity reproduction.
この例を第1図に示す。An example of this is shown in FIG.
第1図は2ウエイの場合で、1は低音用スピーカ、2は
高音用スピーカ、3はキャビネットである。FIG. 1 shows a 2-way system, where 1 is a bass speaker, 2 is a treble speaker, and 3 is a cabinet.
この場合、低音用スピーカ1は通常数十Hzから100
0〜2000Hzまで、高音用スピーカ2は1000〜
2000Hzから上の周波数帯域を分担する。In this case, the bass speaker 1 usually has a frequency range of several tens of Hz to 100 Hz.
From 0 to 2000Hz, treble speaker 2 from 1000Hz
The frequency band above 2000Hz will be shared.
このようにするとそれぞれのスピーカユニットの設計は
部属になるが、周波数帯域により音の出てくる方向が異
なるため、音像の位置が不明確になってしまう欠点があ
る。In this case, the design of each speaker unit is independent, but since the direction in which the sound comes out differs depending on the frequency band, there is a drawback that the position of the sound image becomes unclear.
3ウ工イ以上のシステムでは使用するスピーカの数が増
えるため音源の分布がさらに広がってしまう。In a system with three speakers or more, the number of speakers used increases, so the distribution of sound sources becomes wider.
そこでこのような欠点を除くため、第2図に示すような
同軸形スピーカが用いられる。In order to eliminate this drawback, a coaxial speaker as shown in FIG. 2 is used.
第2図は同軸形スピーカを用いた装置の側断面図を示し
たものであり、低音スピーカ1と高音スピーカ2は同軸
に配置されている。FIG. 2 shows a side sectional view of a device using coaxial speakers, in which a bass speaker 1 and a treble speaker 2 are arranged coaxially.
スピーカ正面からみた場合低音スピーカ1と高音スピー
カ2が同じ位置にあるため音像の定位がきわめて良い。When viewed from the front of the speaker, the bass speaker 1 and the treble speaker 2 are in the same position, so the localization of the sound image is extremely good.
ただ、この方式の欠点は高音スピーカからの音の一部が
低音スピーカの振動板4で反射され周波数変調を受ける
ことである。However, a drawback of this method is that a part of the sound from the high-pitched speaker is reflected by the diaphragm 4 of the low-pitched speaker and undergoes frequency modulation.
第2図中11および12は高音スピーカからの音であり
、11は聴取者に直接到達する音であり、12は低音ス
ピーカの振動板にあたって反射される音である。In FIG. 2, 11 and 12 are sounds from the high-pitched speakers, 11 is the sound that reaches the listener directly, and 12 is the sound that is reflected by the diaphragm of the low-pitched speaker.
12が反射される際に低音スピーカの振動板4の振動周
波数(flとする)によって周波数変調を受は高音スピ
ーカ2の振動周波数(f2とする、f2≧f1)以外の
音の成分(f2±nfl 、nは整数)が発生する。12 is reflected, it is frequency modulated by the vibration frequency of the diaphragm 4 of the bass speaker (denoted as fl), and the sound components (f2± nfl, n is an integer) is generated.
これが混変調歪と呼ばれるものであり、高調波歪と比べ
て耳につきやすいと言われる。This is called cross-modulation distortion, and it is said to be more audible than harmonic distortion.
これは混変調歪の周波数(f2±nf1)かもとの周波
数f 1’、1i6よびf2と整数倍の関係にないため
である。This is because the frequency of cross-modulation distortion (f2±nf1) is not an integral multiple of the original frequencies f1', 1i6, and f2.
このような混変調歪の発生が同軸形スピーカの最犬の欠
点である。The occurrence of such cross-modulation distortion is the most serious drawback of coaxial speakers.
本発明はこの欠点を解消するためのものである。The present invention aims to overcome this drawback.
本発明の一実施例を第3図に示す。An embodiment of the present invention is shown in FIG.
γは低音スピーカ5の振動板で、平面状であり、かつ、
中心部に孔8を翁し、この孔8内に高音用スピーカ6が
上記振動板1と同一平面上になるように配設しである。γ is a diaphragm of the bass speaker 5, which is planar, and
A hole 8 is formed in the center, and a treble speaker 6 is placed in the hole 8 so as to be on the same plane as the diaphragm 1.
このため、高音スピーカ6から低音スピーカ5の振動板
7へ向って反則される音12は振動面にほぼ平行であり
、周波数変調を受ける割合は非常に少なくなる。Therefore, the sound 12 reflected from the high-pitched speaker 6 toward the diaphragm 7 of the low-pitched speaker 5 is substantially parallel to the vibration plane, and the proportion of the sound 12 subjected to frequency modulation is extremely small.
また、反則を受けてもその方向がスピーカ正面軸から離
れているために聴取者に到達する混変調歪の量はさらに
少ないものとなる。Furthermore, even if a violation occurs, the amount of cross-modulation distortion that reaches the listener will be even smaller because the direction is away from the front axis of the speaker.
第3図の実施例では低音スピーカ5の振動板7と高音ス
ピーカ6を同一平面上に配置しているが、これは本発明
の効果を得るために絶対的に必要な条件ではなく、高音
スピーカ6が多少落込んでいても良い。In the embodiment shown in FIG. 3, the diaphragm 7 of the bass speaker 5 and the treble speaker 6 are arranged on the same plane, but this is not an absolutely necessary condition to obtain the effects of the present invention. It is okay if 6 is slightly depressed.
さらに、本発明の副次的な利点として次のようなものが
あげられる。Furthermore, the following are secondary advantages of the present invention.
すなイっち、第2図の実施例では低音スピーカ1の振動
板4が高音スピーカ2に対してバッフル面からなり落込
んでいるため、過渡的な音に対して低音スピーカと高音
スピーカから聴取者までの音の到達時間に差が生ずる。In the embodiment shown in Fig. 2, the diaphragm 4 of the bass speaker 1 is a baffle surface and is sunk relative to the treble speaker 2, so that transient sounds can be heard from the bass speaker and the treble speaker. There is a difference in the time it takes for the sound to reach the target.
これに対して第3図のように低音スピーカ5の振動板7
が平面の場合には低音、高音ともに聴取者にほぼ回−の
時間遅れで到達するため、より忠実な再生が1寸能とな
る。On the other hand, as shown in FIG. 3, the diaphragm 7 of the bass speaker 5
In the case of a flat surface, both bass and treble tones reach the listener with a time delay of approximately 100 Hz, resulting in even more faithful reproduction.
まf−’!3然ながら左右上下とも対称性を右している
ため、スデレオ再生を行なう際にバランスのとれた文体
音場が得られるという利点をも石する。Maf-'! 3 Naturally, since it is symmetrical both horizontally and vertically, it also has the advantage of providing a well-balanced stylistic sound field when performing stereophonic reproduction.
以上述べたように、本発明によれば混変調歪を低減した
特性の優れた同軸形スピーカを得ることができる。As described above, according to the present invention, a coaxial speaker with excellent characteristics and reduced cross-modulation distortion can be obtained.
なお、上記実施例では2ウエイのものについて説明した
が、同様の構成で3ウ工イ以上の方式にすることも容易
に変更可能である。In the above embodiment, a two-way system has been described, but it can be easily modified to a three-way or more system with the same configuration.
第1図は従来から用いられている2ウエイスピーカ装置
の断面図、第2図は同じ〈従来から用いられている同軸
形の2ウエイスピーカ装置の断面図、第3図は本発明の
一実施例を示す同軸形スピーカの断面図である。
図中、5は低音スピーカ、6は高音スピーカ、1は低音
スピーカの振動板、8は低音スピーカの振動板に設けら
れた孔である。Fig. 1 is a sectional view of a conventionally used two-way speaker device, Fig. 2 is a sectional view of the same coaxial two-way speaker device conventionally used, and Fig. 3 is an embodiment of the present invention. FIG. 2 is a cross-sectional view of an example coaxial speaker. In the figure, 5 is a bass speaker, 6 is a treble speaker, 1 is a diaphragm of the bass speaker, and 8 is a hole provided in the diaphragm of the bass speaker.
Claims (1)
一軸上に配置してなる同軸形スピーカにおいて、最も低
い周波数帯域を再生する低音用スピーカの振動板の形状
を平面状にするとともに、この振動板の中心部に設けた
孔内に上記振動板と同一平面上またはこれより多少落込
むように他のより高音用のスピーカを配設したことを特
徴とする同軸形スピーカ。1. In a coaxial speaker in which a plurality of speakers each having a dedicated reproduction frequency band are arranged on the same axis, the shape of the diaphragm of the bass speaker that reproduces the lowest frequency band is made flat, and this diaphragm is A coaxial speaker characterized in that another higher-pitched speaker is disposed in a hole provided in the center of the diaphragm so as to be on the same plane as the diaphragm or slightly lower than the diaphragm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4814077A JPS5845234B2 (en) | 1977-04-26 | 1977-04-26 | coaxial speaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4814077A JPS5845234B2 (en) | 1977-04-26 | 1977-04-26 | coaxial speaker |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS53133018A JPS53133018A (en) | 1978-11-20 |
JPS5845234B2 true JPS5845234B2 (en) | 1983-10-07 |
Family
ID=12795029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4814077A Expired JPS5845234B2 (en) | 1977-04-26 | 1977-04-26 | coaxial speaker |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5845234B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60159734U (en) * | 1984-04-02 | 1985-10-24 | 株式会社 クマエンジニアリング | Quantity supply hopper |
JPS62105941U (en) * | 1985-12-23 | 1987-07-06 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5728475Y2 (en) * | 1978-02-15 | 1982-06-21 | ||
JPS5912691A (en) * | 1982-07-13 | 1984-01-23 | Matsushita Electric Ind Co Ltd | Small-sized speaker |
-
1977
- 1977-04-26 JP JP4814077A patent/JPS5845234B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60159734U (en) * | 1984-04-02 | 1985-10-24 | 株式会社 クマエンジニアリング | Quantity supply hopper |
JPS62105941U (en) * | 1985-12-23 | 1987-07-06 |
Also Published As
Publication number | Publication date |
---|---|
JPS53133018A (en) | 1978-11-20 |
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