JPH018077Y2 - - Google Patents
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- Publication number
- JPH018077Y2 JPH018077Y2 JP13054382U JP13054382U JPH018077Y2 JP H018077 Y2 JPH018077 Y2 JP H018077Y2 JP 13054382 U JP13054382 U JP 13054382U JP 13054382 U JP13054382 U JP 13054382U JP H018077 Y2 JPH018077 Y2 JP H018077Y2
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- sound pressure
- winding
- frequency
- circuit
- windings
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- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
【考案の詳細な説明】
本考案は、2つの巻線からなるボイスコイルを
用いて低音域の再生限界周波を低下させるように
した動電形スピーカ装置に関するものである。[Detailed Description of the Invention] The present invention relates to an electrodynamic speaker device that uses a voice coil consisting of two windings to lower the reproduction limit frequency in the bass range.
従来、この種のスピーカ装置として第1図に示
されるものがあつた。図示のスピーカ装置の基本
原理は、第1及び第2の2つの巻線1a,1bに
より構成したボイスコイル1を振動板2に結合
し、巻線部分を磁気回路の磁気ギヤツプ内に位置
させてなる動電形スピーカを使用し、第1の巻線
1aとこれに直列に接続したインダクタL及びキ
ヤパシタCからなるLC直列共振回路との直列回
路と、第2の巻線1bとを入力端子3,3′間に
並列接続し、かつLC直列共振回路の共振周波数
をスピーカの最低共振周波数OC付近に選択し、
このことによつて最低共振周波数OC付近におい
て第2の巻線1bだけでなく第1の巻線1aにも
信号電流が流れるようにしてスピーカの最低共振
周波数OC付近の音圧レベルを増大させ、見掛け
上スピーカの共振先鋭度QOCが大きくなつたと同
じに見えるようにしている。この音圧特性Aを単
一の巻線からなるボイスコイルの場合Bと比較し
て第2図に示す。またこのときのインピーダンス
特性Aを単一巻線からなるボイスコイルの場合B
と比較して第3図に示し、図から全帯域を通して
インピーダンス特性が平坦化されていることが判
る。 Conventionally, there has been a speaker device of this type as shown in FIG. The basic principle of the illustrated speaker device is that a voice coil 1 composed of two first and second windings 1a and 1b is coupled to a diaphragm 2, and the winding portion is located within a magnetic gap of a magnetic circuit. A series circuit consisting of a first winding 1a and an LC series resonant circuit consisting of an inductor L and a capacitor C connected in series with the first winding 1a, and a second winding 1b are connected to the input terminal 3. , 3' in parallel, and the resonant frequency of the LC series resonant circuit is selected near the lowest resonant frequency OC of the speaker.
This causes a signal current to flow not only to the second winding 1b but also to the first winding 1a in the vicinity of the lowest resonant frequency OC , thereby increasing the sound pressure level in the vicinity of the lowest resonant frequency OC of the speaker. Apparently, it looks the same as if the resonance sharpness QOC of the speaker had increased. This sound pressure characteristic A is shown in FIG. 2 in comparison with B in the case of a voice coil consisting of a single winding. In addition, the impedance characteristic A at this time is B in the case of a voice coil consisting of a single winding.
A comparison is shown in FIG. 3, and it can be seen from the figure that the impedance characteristics are flattened throughout the entire band.
上述のようにこのスピーカ装置は最低共振周波
数OCは変化せず、見掛けのQOCのみを変化させて
いるので、より低い周波数まで再生しようとすれ
ば、振動系の重量を大きくしてOCを低下させる
必要がある。この結果、音圧レベルが低下するの
で、元の音圧レベルを保つためにはより大きな駆
動力、つまり力係数Bl(B:磁気ギヤツプ磁束密
度、l:ボイスコイル有効長)を必要とし、必然
的にQOCの低下に結びつくため、期待したほどの
音圧レベルの上昇が得られない欠点があつた。 As mentioned above, this speaker device does not change the lowest resonant frequency OC , but only changes the apparent Q OC , so if you want to reproduce lower frequencies, you have to increase the weight of the vibration system to lower the OC. It is necessary to do so. As a result, the sound pressure level decreases, and in order to maintain the original sound pressure level, a larger driving force, that is, a force coefficient Bl (B: magnetic gap magnetic flux density, l: voice coil effective length) is required. This has the disadvantage that the expected increase in sound pressure level cannot be obtained because it leads to a decrease in Q OC .
また、第3図に示すようにインピーダンスが低
下するため駆動増幅器の負荷としては重くなり、
増幅器の発熱が大きくなるなどの欠点もあつた。 Additionally, as shown in Figure 3, the impedance decreases, making the load on the drive amplifier heavier.
There were also drawbacks such as increased heat generation from the amplifier.
本考案は上述した点に鑑みてなされたもので、
高能率で実質的な再生帯域を低音域側に拡大でき
るようにした動電形スピーカ装置を提供すること
にある。 This invention was made in view of the above points,
An object of the present invention is to provide an electrodynamic speaker device capable of expanding a substantial playback band to the bass side with high efficiency.
以下本考案を第4図以降を参照して説明する
が、第1図と同等の部分には同一の符号を付して
ある。 The present invention will be explained below with reference to FIG. 4 and subsequent figures, in which the same parts as in FIG. 1 are given the same reference numerals.
第4図において、同一のボビンに第1の巻線1
aと第2の巻線1bを巻回してボイスコイル1を
形成し、このボイスコイル1を振動板2に結合す
ると共に、その巻線部分を磁気回路の磁気ギヤツ
プ内に位置させている点は第1図のスピーカ装置
と同じである。 In Fig. 4, the first winding 1 is attached to the same bobbin.
A and a second winding 1b are wound to form a voice coil 1, this voice coil 1 is coupled to a diaphragm 2, and the winding portion is located within the magnetic gap of the magnetic circuit. This is the same as the speaker device shown in FIG.
第1の巻線1aの一端は、キヤパシタCとのイ
ンダクタLのそれぞれの一端に接続され、上記イ
ンダクタLの他端に第2の巻線1bの一端が接続
されている。また第1及び第2の巻線1a及び1
bの他端は信号の帰路に直接接続されている。 One end of the first winding 1a is connected to one end of each of a capacitor C and an inductor L, and the other end of the inductor L is connected to one end of the second winding 1b. Also, the first and second windings 1a and 1
The other end of b is directly connected to the signal return path.
第4図の本考案のスピーカ装置の等価回路は第
5図に示すように表わされ、図中eは信号源の電
圧、C0はキヤパシタCの容量、L0はインダクタ
Lのインダクタンス、Mは第1及び第2の巻線1
a及び1bの相互インダクタンス、A1は第1の
巻線1aの力係数(=Bl1)、A2は第2の巻線1
bの力係数(=Bl2)、Zmは振動部の機械インピ
ーダンスであり、信号の角周波数をωとすると、
振動板2は以下に示す式で表わされる振動速度V
で振動するようになる。 The equivalent circuit of the speaker device of the present invention shown in FIG . 4 is expressed as shown in FIG. are the first and second windings 1
The mutual inductance of a and 1b, A 1 is the force coefficient of the first winding 1a (=Bl 1 ), A 2 is the force coefficient of the second winding 1
If the force coefficient of b (=Bl 2 ), Zm is the mechanical impedance of the vibrating part, and the angular frequency of the signal is ω, then
The vibration plate 2 has a vibration velocity V expressed by the formula shown below.
It starts to vibrate.
V=A/B
A=(X1+jY1){A1X4+A2X5
+j(A1Y4+A2Y5)}
B=Zm(X3+jY3)(X5+jY5)
+A1(A1−A2)−(X2+jY2)
{A1X4+A2X5+j(A1Y4+A2Y5)}
上記式において、
X1=ω2MC0e
Y1=ωC0R1e
X2=A(1−ωMC0)−A2
Y2=−ωC0R1A2
X3=R1(1−ωL0C0)+R2
Y3=ω{L0−2M+C0(R1R2+ω2M2)}
X4=R2
Y4=ω(L0−M)
X5=R1
Y5=−ωM
であり、R1及びR2はそれぞれ第1及び第2の巻
線1a及び1bの直流抵抗を表わす。 V = A /B A= ( X 1 +jY 1 ) { A 1 X 4 + A 2 1 (A 1 −A 2 )−(X 2 +jY 2 ) { A 1 X 4 +A 2 X 5 +j(A 1 Y 4 +A 2 Y 5 )} In the above formula , = ωC 0 R 1 e X 2 = A (1-ωMC 0 ) -A 2 Y 2 = -ωC 0 R 1 A 2 0 −2M+C 0 (R 1 R 2 +ω 2 M 2 )} X 4 = R 2 Y 4 = ω ( L 0 − M ) It represents the DC resistance of the first and second windings 1a and 1b.
上記式によつて求められる振動板2の振動速度
Vは音圧Pとの間に、
|P|=ωρ|V|S/2πr
なる関係があり、式中、ρは空気の密度、Sは振
動板の面積、rは距離である。 The vibration velocity V of the diaphragm 2 determined by the above formula has the following relationship with the sound pressure P: |P|=ωρ|V|S/2πr, where ρ is the air density and S is the The area of the diaphragm, r, is the distance.
この音圧を表わす式に基き本考案のスピーカ装
置の音圧特性を描くと、第6図にAで示すように
なり、見かけの最低共振周波数OCが、インダク
タL及びキヤパシタCの値の組合せにより、OC
より低い任意の周波数OC′に移動され、単一巻線
のボイスコイルの場合の特性Bと比較すれば明ら
かなように、低音再生帯域が著しく拡大されてい
ることが判る。なお、第7図はインピーダンス特
性を示し、Aが本考案、Bが単一巻線の場合の特
性である。 When the sound pressure characteristics of the speaker device of the present invention are drawn based on the formula expressing this sound pressure, it becomes as shown by A in Fig. 6, and the apparent lowest resonant frequency OC is determined by the combination of the values of the inductor L and capacitor C. , O.C.
As is clear from the comparison with characteristic B in the case of a single-winding voice coil shifted to a lower arbitrary frequency OC ', it can be seen that the bass reproduction band is significantly expanded. Note that FIG. 7 shows impedance characteristics, where A is the characteristic of the present invention and B is the characteristic when a single winding is used.
第8図は音圧特性とアドミタンス特性の実測値
を示し、図中Aが本考案による装置のもの、Bが
第4図において第2の巻線1bを開放すると共に
キヤパシタCを短絡した単一巻線からなるボイス
コイルを有する通常のスピーカ装置のものであ
る。 Figure 8 shows the measured values of sound pressure characteristics and admittance characteristics, in which A is the one for the device according to the present invention, and B is the one for the device in which the second winding 1b is opened and the capacitor C is shorted in Figure 4. This is a typical speaker device having a voice coil made of wire.
第9図は第1の巻線1aと第2の巻線1bの力
係数Bl1とBl2を変化させた場合のアドミタンス、
音圧の各特性を計算により求めて示しており、イ
がBl1:Bl2=2:1、ロがBl1:Bl2=3:1、ハ
がBl1:Bl2=4:1の場合の特性である。 Figure 9 shows the admittance when the force coefficients Bl 1 and Bl 2 of the first winding 1a and the second winding 1b are changed,
Each characteristic of sound pressure is calculated and shown. A is Bl 1 : Bl 2 = 2:1, B is Bl 1 : Bl 2 = 3:1, and C is Bl 1 : Bl 2 = 4:1. This is a characteristic of the case.
第5図の等価回路は特に説明しなかつたが密閉
型のキヤビネツトを使用した場合のもので、バス
レフ型のキヤビネツトを使用した場合には、第1
0図に示すように、第5図のものとは若干異なる
等価回路になる。第10図において、第5図と同
等のものは同一符号を付してあるので、第5図に
示されないもののみを説明する。図中M0は振動
系の等価質量、Csは支持系の等価コンプライア
ンス、Rmは支持系の機械抵抗、Ccはキヤビネツ
トの等価コンプライアンス、Mpはバスレフダク
トの等価質量、Rpバスレフダクトの等価機械抵
抗であり、音圧周波数特性を知るためには、キヤ
ビネツトのコンプライアンスCcを流れる体積速
度Vcを求めればよいのでこれを計算すると次式
を得る。 Although the equivalent circuit in Figure 5 is not specifically explained, it is for the case where a sealed type cabinet is used.If a bass reflex type cabinet is used, the first
As shown in FIG. 0, the equivalent circuit is slightly different from that shown in FIG. In FIG. 10, parts equivalent to those in FIG. 5 are given the same reference numerals, so only those not shown in FIG. 5 will be described. In the figure, M0 is the equivalent mass of the vibration system, Cs is the equivalent compliance of the support system, Rm is the mechanical resistance of the support system, Cc is the equivalent compliance of the cabinet, Mp is the equivalent mass of the bass reflex duct, and Rp is the equivalent mechanical resistance of the bass reflex duct. In order to know the sound pressure frequency characteristics, it is sufficient to find the volume velocity Vc flowing through the compliance Cc of the cabinet, and by calculating this, the following equation is obtained.
Vc=A/B
A={X7X1−Y7Y1
+j(Y7X1+Y1X7)}{A1X4+A2X5
+j(A1Y4+A2Y5)}
B={X7X3−Y8Y3
+j(X7Y3+Y8X3)}〔X6X5−Y6Y5
+A1(A1−A2)+j(Y6Y5+X6Y5)
−{(X7X2−Y8Y2)+j
(X7Y2+Y8X2)}〕{A1X4+A2X5
j(A1Y4+A2Y5)}
この式において、
X1=ω2MC0e
Y1=ωC0R1e
X2=A1(1−ω2MC0)−A2
Y2=−ωC0R1A2
X3=R1(1−ω2L0C0)+R2
Y3=ω{L0−2M+C0(R1R2+ω2M2)}
X4=R2
Y4=ω(L−M)
X5=R1
Y5=−ωM
X6=Rm+Rp/(1−ω2MpCc)2+ω2Cc2Rp2
Y6=ωM0−1/ωCs
+ωMp(1−ω2MpCc)−CcRp2/(1−ω2MpCc)2+
ωCcRp2
X7=Rp
Y7=ωMp
Y8=ωMp−1/ωCs
である。Vc = A/B A={X 7 X 1 −Y 7 Y 1 +j (Y 7 X 1 +Y 1 X 7 )} { A 1 X 4 + A 2 B= { X 7 X 3 −Y 8 Y 3 +j ( X 7 Y 3 + Y 8 X 3 )} [ X 6 6 Y 5 ) − { ( X 7 X 2 −Y 8 Y 2 ) +j ( X 7 Y 2 +Y 8 X 2 )}} {A 1 } In this formula , X 1 = ω 2 MC 0 e Y 1 = ωC 0 R 1 e R 1 (1-ω 2 L 0 C 0 ) + R 2 Y 3 = ω {L 0 -2M + C 0 (R 1 R 2 + ω 2 M 2 )} X 4 = R 2 Y 4 = ω (L-M) 5 = R 1 Y 5 = −ωM 1−ω 2 MpCc) 2 +
ωCcRp 2 X 7 = Rp Y 7 = ωMp Y 8 = ωMp−1/ωCs.
なお、音圧特性は次式により求められる。 Note that the sound pressure characteristics are determined by the following equation.
|P|=ωρ|Vc|S/2πr
式中、Pは空気の密度、Sは振動板の面積、r
は距離である。|P|=ωρ|Vc|S/2πr where P is the density of air, S is the area of the diaphragm, and r
is the distance.
第10図に示す等価回路を有するスピーカ装置
について、第11図のアドミタンス、音圧特性を
参照しながら更に説明する。同図において、1点
波線は単一巻線からなるボイスコイルをもつたス
ピーカを密閉型キヤビネツトに収納したときの各
特性を表わし、共振先鋭度QOC0.5程度でのシス
テムの最低共振周波数OCは図のような位置にな
る。同じスピーカを密閉型キヤビネツトと同内容
積のバスレフ型キヤビネツトに収納し、ダクトの
共振周波数を1とすると、同図に点線で示すよう
な特性になり、アドミタンスの極大周波数が1に
一致し、音圧特性の低域再生限界周波数もほぼこ
の1の付近となり、見掛けのQが高く、すなわち
音圧が高くなる。 The speaker device having the equivalent circuit shown in FIG. 10 will be further explained with reference to the admittance and sound pressure characteristics shown in FIG. 11. In the figure, the dotted line represents each characteristic when a speaker with a voice coil consisting of a single winding is housed in a sealed cabinet, and the minimum resonant frequency OC of the system with a resonance sharpness Q OC of about 0.5 is The position will be as shown in the figure. If the same speaker is housed in a bass reflex type cabinet with the same internal volume as a closed type cabinet, and the resonant frequency of the duct is set to 1 , the characteristics will be as shown by the dotted line in the figure, the maximum frequency of admittance will match 1 , and the sound will be The low frequency reproduction limit frequency of the pressure characteristic is also approximately 1 , and the apparent Q is high, that is, the sound pressure is high.
一方、本考案のスピーカ装置をバスレフ型キヤ
ビネツトに収納すると、第1図における容量C0
と、その後に接続されているインダクタンスL0
及び機械回路の等価的なインダクタンス成分を含
めた等価インダクタンス(Le)とにより、駆動
力の増大を得、音圧レベルが増大することになる
(実線)。このことは実線のアドミタンス特性にお
いても、周波数1で極大となつていることでも判
る。なお、2点破線は、密閉型キヤビネツトに収
納したときの各特性を示す。 On the other hand, when the speaker device of the present invention is housed in a bass reflex type cabinet, the capacity C 0 in Fig. 1 is
and the inductance L 0 connected after that
and the equivalent inductance (Le) including the equivalent inductance component of the mechanical circuit, the driving force is increased and the sound pressure level is increased (solid line). This can be seen from the fact that the admittance characteristic shown by the solid line is at its maximum at frequency 1 . Note that the two-dot broken line indicates each characteristic when housed in a closed cabinet.
ところで、周波数1においては、第2の巻線1
bにより多くの電流を流すようにした方が音圧の
増大効果が大きいことが実験により確認された
が、このための最適値は第1及び第2の巻線1
a,1bの力係数A1,A2と直流抵抗R1,R2との
選び方によつて設定しうる。 By the way, at frequency 1 , the second winding 1
Experiments have confirmed that the effect of increasing sound pressure is greater when more current is passed through b, but the optimum value for this is
It can be set by selecting the force coefficients A 1 , A 2 of a, 1b and the DC resistances R 1 , R 2 .
シミユレーシヨンの結果、A1:A2=1:0.25
〜0.5程度が最も効果が大きいことが判つた。ま
た直流抵抗については、第1、第2の巻線のいず
れにおいても小さい方が音圧増大効果は大きい
が、アドミタンスが大きくなり過ぎて実質的な電
気入力が大きくなつてしまうため、すなわち駆動
増幅器の出力を増大させるため、目安としては1
ににおけるアドミタンスの極大値を中域のアドミ
タンスとほぼ等しい値にすることが望ましい。 Simulation results: A 1 :A 2 = 1:0.25
It was found that a value of about 0.5 had the greatest effect. Regarding the DC resistance, the smaller the DC resistance in both the first and second windings, the greater the sound pressure increase effect, but the admittance becomes too large and the actual electrical input becomes large. In order to increase the output of
It is desirable that the maximum value of the admittance in the middle range be approximately equal to the admittance in the middle range.
第12図は更に他の実施例を示し、各巻線と直
列に可変抵抗器VR1,VR2を追加挿入している。
この可変抵抗器VR1,VR2を変化させると第13
図a及びbに示すように低域特性を簡単に変化さ
せることができる。特にVR2は最低音域の所謂肩
特性を任意にコントロールできるので、スピーカ
を設置した室の定在波によつて低域にピークが生
じる場合などの解消手段として有効である。また
VR1は最低音域の肩特性をほとんど変化させずに
中低音域のレベルをコントロールできるので、例
えば壁面にピツタリ密着して設置したり、壁面へ
埋め込んだり、或は室のコーナーに設置した場合
などに起りやすい中低音域過多によるブーミーな
低音の解消に有効である。 FIG. 12 shows yet another embodiment in which variable resistors VR 1 and VR 2 are additionally inserted in series with each winding.
By changing these variable resistors VR 1 and VR 2 , the 13th
As shown in Figures a and b, the low frequency characteristics can be easily changed. In particular, VR 2 allows you to arbitrarily control the so-called shoulder characteristics of the lowest frequency range, so it is effective as a means of resolving cases where a peak occurs in the low range due to standing waves in the room where the speaker is installed. Also
Since the VR 1 can control the level of the mid-bass range without changing the shoulder characteristics of the lowest range, for example, it can be installed tightly against a wall, embedded in a wall, or installed in the corner of a room. It is effective in eliminating the boomy bass caused by excessive mid-bass range that tends to occur.
図示の例では、VR1及びVR2は所謂連続可変型
の可変抵抗器を示しているが、固定抵抗器とスイ
ツチの組合せにて構成しても良いことは勿論であ
る。またVR1とVR2はそれぞれ単独でも、或は連
動して変化するものであつてもよい。 In the illustrated example, VR 1 and VR 2 represent so-called continuously variable variable resistors, but it goes without saying that they may be constructed from a combination of fixed resistors and switches. Further, VR 1 and VR 2 may be changed individually or in conjunction with each other.
更に、バスレフ条件を変化させる、ダクトの全
長L及び開口面積Spを変化させたときの音圧特
性の変化を第14図に示す。すなわち、ダクトの
等価質量Mpが大きくなれば、見掛けのQは小さ
くなるが、低域再生限界周波数は低下する。逆に
Mpを小さくすれば、逆に見掛けのQは大きくな
り、低域再生限界周波数は上昇する。 Furthermore, FIG. 14 shows changes in the sound pressure characteristics when the overall length L and opening area Sp of the duct are changed to change the bass reflex conditions. That is, as the equivalent mass Mp of the duct increases, the apparent Q decreases, but the low-frequency reproduction limit frequency decreases. vice versa
If Mp is made smaller, the apparent Q becomes larger and the low-frequency reproduction limit frequency increases.
なお、上記Mpを可変とする具体的な手段とし
ては、従来から用いられているスライド式のダク
トや継足し方式のダクトを用いても良い。開口面
積を可変する手段としても、従来のシヤツター式
を用いてもよい。この場合、シヤツターを全閉し
て密閉型として動作させ、かつ回路素子のCの値
C0を大とすることにより、第15図に示すよう
に更に低音域側へ再生周波数帯域を拡大すること
ができる。 In addition, as a specific means for making the above-mentioned Mp variable, a conventionally used sliding type duct or adding type duct may be used. A conventional shutter type may be used as a means for varying the opening area. In this case, the shutter is fully closed and operated as a sealed type, and the value of C of the circuit element is
By increasing C 0 , it is possible to further expand the reproduced frequency band to the lower range side, as shown in FIG. 15.
本考案は上述したように、ボイスコイルを2つ
の巻線で構成し、その一方の巻線とインダクタと
の直列回路と他方の巻線との並列回路にキヤパシ
タを直列に接続しているため、インダクタとキヤ
パシタの値の組合せにより、実際の最低共振周波
数より低い任意の最低共振周波数を選定すること
ができ、低音再生帯域を著しく拡大することがで
きる。また、振動系質量を増加することにより低
音再生帯域を拡大したものに比較して音圧レベ
ル、能率を高くすることができ、従つて同音圧レ
ベルのものに比べより小形の磁気回路で済むよう
になり、経済的である。更に、同じ程度の低音再
生帯域のものと比べた場合、振動系の軽量化が図
れるので、中高音域の再生に有利な立上りのよい
スピーカとすることができる。更にまた、超低音
域の音圧レスポンスの低下が急峻であるため、レ
コードのソリなどに起因する不必要な超低音入力
によるコーンの過大振幅が抑えられ、混変調歪の
発生が防止できるなどの従来のスピーカにはない
効果が得られる。 As mentioned above, in the present invention, the voice coil is composed of two windings, and the capacitor is connected in series to the series circuit of one of the windings and the inductor, and the parallel circuit of the other winding. By combining the values of the inductor and capacitor, an arbitrary lowest resonant frequency lower than the actual lowest resonant frequency can be selected, and the bass reproduction band can be significantly expanded. In addition, by increasing the mass of the vibration system, it is possible to increase the sound pressure level and efficiency compared to a system that expands the bass reproduction band, and therefore requires a smaller magnetic circuit than a system with the same sound pressure level. and is economical. Furthermore, since the vibration system can be made lighter compared to a speaker with a similar bass reproduction band, it is possible to create a speaker with a good rise that is advantageous for reproduction of medium and high frequencies. Furthermore, since the sound pressure response in the ultra-low frequency range decreases steeply, excessive amplitude of the cone due to unnecessary ultra-low frequency input caused by warping of records can be suppressed, and cross-modulation distortion can be prevented. You can get effects not found with conventional speakers.
第1図は従来例を示す回路図、第2図及び第3
図は第1図の例の音圧特性及びインピーダンス特
性をそれぞれ示すグラフ、第4図は本考案の基本
回路構成を示す回路図、第5図は第4図の回路の
等価回路図、第6図及び第7図は第5図の等価回
路に基き計算して求めた音圧特性及びインピーダ
ンス特性を従来例の特性と比較してそれぞれ示す
グラフ、第8図は第4図の装置についての音圧特
性及びアドミタンス特性の実測値を従来例の実測
値と比較してそれぞれ示すグラフ、第9図はボイ
スコイルを構成する2つの巻線の力係数を変化さ
せた場合の音圧特性及びアドミタンス特性の変化
を計算に基いて示したグラフ、第10図は第4図
の装置をバスレフ型キヤビネツトに収納したとき
の等価回路、第11図は従来例及び第5図の例の
ものと比較して第10図の装置の音圧特性及びア
ドミタンス特性を示すグラフ、第12図は第10
図の例において各巻線に可変抵抗器を挿入した等
価回路図、第13図は第12図の例において可変
抵抗器を可変したときの音圧レベルの変化を示す
グラフ、第14図はダクト条件を変化されたとき
の第10図の装置の音圧特性を示すグラフ、及び
第15図は第10図の例においてダクト開口を全
閉してC0を変化させたときの音圧特性を示すグ
ラフである。
1……ボイスコイル、1a,1b……巻線、L
……インダクタ、C……キヤパシタ。
Figure 1 is a circuit diagram showing a conventional example, Figures 2 and 3
The figures are graphs showing the sound pressure characteristics and impedance characteristics of the example shown in Fig. 1, Fig. 4 is a circuit diagram showing the basic circuit configuration of the present invention, Fig. 5 is an equivalent circuit diagram of the circuit shown in Fig. 4, and Fig. 6 is a graph showing the sound pressure characteristics and impedance characteristics of the example shown in Fig. 1. 7 and 7 are graphs showing the sound pressure characteristics and impedance characteristics calculated based on the equivalent circuit of FIG. 5 in comparison with the characteristics of the conventional example, and FIG. 8 is a graph showing the sound pressure characteristics and impedance characteristics calculated based on the equivalent circuit of FIG. A graph showing the measured values of the pressure characteristics and admittance characteristics in comparison with the measured values of the conventional example. Figure 9 shows the sound pressure characteristics and admittance characteristics when the force coefficients of the two windings that make up the voice coil are changed. Figure 10 is an equivalent circuit when the device shown in Figure 4 is housed in a bass reflex type cabinet, and Figure 11 is a graph showing the changes in the figure based on calculations. A graph showing the sound pressure characteristics and admittance characteristics of the device shown in FIG. 10, and FIG.
An equivalent circuit diagram with a variable resistor inserted in each winding in the example shown in the figure, Figure 13 is a graph showing changes in sound pressure level when varying the variable resistor in the example shown in Figure 12, and Figure 14 is a graph showing the duct conditions. 10 is a graph showing the sound pressure characteristics of the device as shown in FIG. 10, and FIG. 15 shows the sound pressure characteristics when the duct opening is fully closed and C 0 is changed in the example shown in FIG. 10. It is a graph. 1...Voice coil, 1a, 1b...Winding, L
...Inductor, C...Capacitor.
Claims (1)
スコイルを有する動電形スピーカを備え、前記2
つの巻線の一方とインダクタとの直列回路と前記
2つの巻線の他方との並列回路にキヤパシタを直
列に接続したことを特徴とする動電形スピーカ装
置。 an electrodynamic speaker having a voice coil consisting of two windings wound on the same bobbin;
An electrodynamic speaker device characterized in that a capacitor is connected in series to a series circuit of one of the two windings and an inductor and a parallel circuit of the other of the two windings.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13054382U JPS5936688U (en) | 1982-08-31 | 1982-08-31 | Electrodynamic speaker device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13054382U JPS5936688U (en) | 1982-08-31 | 1982-08-31 | Electrodynamic speaker device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5936688U JPS5936688U (en) | 1984-03-07 |
JPH018077Y2 true JPH018077Y2 (en) | 1989-03-02 |
Family
ID=30295423
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13054382U Granted JPS5936688U (en) | 1982-08-31 | 1982-08-31 | Electrodynamic speaker device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5936688U (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2621264B2 (en) * | 1987-12-18 | 1997-06-18 | 株式会社デンソー | ▲ Ro ▼ Detector for clogging of excess element |
-
1982
- 1982-08-31 JP JP13054382U patent/JPS5936688U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS5936688U (en) | 1984-03-07 |
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