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to a speaker system signal source, a fan J speaker, and this speaker. l: '1 l-2 speaker, delay means
of signal source output, output 9 from the speaker 2 due to sound or coupling, and control of the
second speaker with respect to the output of the delay means 2, distortion Speaker system to
reduce the
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high fidelity
loudspeaker system. Loudspeakers have been researched on materials and materials as
conventional loop systems, and improvements have been made to the patent t, but of course
there are barriers to this. The two inventions (based on the new idea of improving the speaker
output wave itself by feedback). The eleventh line fa + shows one practical example of the
speaker thread according to the present invention. Although 1 is a signal source, a voice output is
generated via a voice coil class 2, but this t is naturally delayed relative to the 1 signal. And
includes distortion components of both speakers. (5) An amplifier or a zero kera relay that uses
the output of the coil 5 as needed for the signal ER that has passed through the delay 7 having
the same delay τ is spread over the fast wave transmission time τ between 3.4. It is
convenient to use BT3D). When τ is small, the delay 7Fi may be omitted. E and ER normalize the
amplitude to generate B-ER in the circuit 8 and pass through the linear amplifier 9 to Ei to drive
the speaker 4 by the coil 6 again. As a result, the power 15 generated in the coil 5 is taken as Ei '.
5 and 6 As described later, the circuit tank E = Ei−J i'20EndPage: 1 = Ei− (H−E 几) A−: [ii1 +
ABn, Eo−10 AA is a sufficiently large human being with amplification of 9 For example, it can be
seen that E = Fa, that is, the speaker 4 compensates for the distortion of the speakers 3 and 4 and
performs almost no distortion. Since the speakers 3 and 4 are acoustically coupled at some
places, the result is a closed loop system in which distortion is 1 sI through the 3.4 speaker. The
speaker 4 may use a coil tap 21 as shown in FIG. 1 fb1 instead of two coils, or may use a circuit
that grounds the tap using a resistance 20 and the like. FIG. 2 is a modification of FIG. 1 in which
vco (I pressure control and elevation oscillator) 12 is controlled to control the delay of FBI
through delay circuit 11 so that the sound propagation time τ does not fluctuate due to
temperature etc. The details are shown last in Figure 4. The 11 good constants are controlled so
as to be longer than the period of the lowest frequency of the sound wave and to minimize the
time average value of E-g 最小. Of course, for example, it may be performed manually using the
indicator 30. The control frequency of the BBD may be an audio wave, for example 300 KHz. The
control frequency can be changed by VCo or the like to adjust the delay time. In the speaker
system as described above, the position of the stealer may listen to both speaker outputs at a
position near the 5-point force 4 or slightly inclined to 3.4. FIG. 3 shows the fc point where the
present invention is applied to a passive cabinet (drone cornfather speaker box).
The speaker 3 is a shame-displaced A, 4 is a passive cone 10, and tends to enhance the low
frequency. However, in the present invention, the voltage generated in the voice coil of 4 is used
like 1 fu (fal like al). The symbols correspond to those in FIG. 1.2, but 22 is an equalizer or filter
used as needed. Since the inside of the box is low-pass transit, it may be a 22-button low-pass,
especially with 1510. Fig. 1 (A single coil may be used as in the case of bl. In such a speaker
system, since the speaker 4 has low distortion, the speaker 3 also has low distortion due to sound
coupling, and it is possible to achieve fidelity as a whole by reaching the bass. 20 Fig 4 is
necessary for the above example? An example of a delay automatic control device used in
response is shown. 31 is an oscillator such as a square wave for controlling the VOO 12 and
enters the phase detector 32 at a frequency of 1 l-Iz which is much lower than that of audio, for
example, Dio. The 32 outputs 33 again control the VOO 12 so that 33 approaches zero. In the
case of sound propagation due to temperature etc., in the present invention, it is only necessary
to correct the amount of delay .tau. Particularly the temperature propagation of the sound wave
propagation, the variation due to the temperature especially humidity, and so on. May apply. It is
also known that an oscillator including a temperature generating element such as a thermistor or
a varistor can provide a desired temperature characteristic. In this case, the control system may
be open loop program control. The same correction can be made for air pressure and humidity.
FIG. 5 shows an example of a temperature-sensitive oscillator for controlling a delay 7. The
amplifier 40 is a known 0 几 oscillator in which a CR circuit having FEET 1, T 2 and T 3 as
resistance elements shown by 41.42. is there. Since this resistive element has temperature
dependency, it can be a temperature-controlled oscillator by an appropriate design. When the
temperature rises, the resistance decreases and the oscillation frequency rises, so that the delay
is reduced and to drive the BBD delay to achieve the purpose. Of course, such a sine wave of the
circuit is converted into a pulse and used. A bipolar transistor, a varistor, or a thermistor may be
used instead of l "ET. A circuit 52 compares the signal passing through 51> x (t + τ) + Δ and the
signal passing through the delay circuit 7 for the sound transmission time τ between the
speaker 3 and the microphone x (t + τ) in a circuit 52 to generate a difference signal error Δ
due to distortion. Let Then, the circuit 53 processes this Δ and the 15 undistorted x (t + τ) from
the delay 7 to produce x (t + τ) −Δ and drives the similar second speaker 55. No distortion
occurs because x (t + τ) −Δ + Δ = x (ten τ). In this case as well, if necessary, the delay
20EndPage: 2 control associated with temperature fluctuation or the like, or the closed loop
control which minimizes Δ as described above, is introduced through the strange constant
circuit 11 as shown in FIG. In this case, the circuit 53 may change the coefficient unit 53 because
the drone cone 4 generates x (t + τ) + 2Δ.
Also, if 53 drives x 60 (t + τ>-tΔ) and drives the speaker 60 of another similar speaker cone, the
sound output of 60 will be x (t + D)-2 Δ, and the sound output of the passive cable · y 61 will be
Since X (t + 2τ) -Δ, the two speaker boxes are controlled in parallel and in a closed loop. In fact,
distortion caused by both speakers 3.4 and the like tends to be averaged due to sound coupling,
but it can be distortion compensated for a set of cisbee forces 60.61. The final adjustment can be
optimized to the actual side 0 In Fig. 8 the basive cone 64 produces an output x (t + τ)-Δ while
the passive cone 64 is in the circuit 52 through the delay 7 and the filters 22 used as required. A
Δ is produced in circuit 52 with the signal. Since this Δ becomes one 3Δ in the circuit 53 and
drives the other drive coils 66 of the speaker 64, the coil 65 can be made to generate x (10) +
2Δ-3Δ = x (t + τ) -Δ. In fact, since there is sound coupling between speakers, the amount of
application is adjusted to be optimal. Therefore, the speaker box of FIG. 8 produces an output
with less distortion as a whole. The coils 65 and 66 are driven by appropriate electronic circuits
as tap coils in some cases as the same coils as in IIPI (b). As described above, temperature
compensation can be performed by controlling the delay 7 through the dotted path. Of course,
the comparison, subtraction circuit 15 and the like used in the above-mentioned magazine
include amplifiers, attenuators and the like having the same amplitude, and in the example of FIG.
8, it is preferable to use a unidirectional amplifier. Reduce distortion by comparing the output of
a microphone or equivalent speaker using a digital type or any other suitable one with a delay
circuit output corresponding to the above-mentioned fixed distance, and, if necessary, of the
above-mentioned delay Various modifications of this old toughness are also possible, including
means for adjusting the magnitude in response to variations in the sound wave transmission
time. When combining two or more speakers, it is possible to adjust so as to minimize distortion
overall. AtAt1bJJ, 、, か, か, か 嘗 ・ 巴 変 形 ・ 変 形 変 形 変 形 変 形 変 形 変 形 変 形 変 形 変
形 変 形 変 形 変 形 変 形 変 形 変 形 変 形It is.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (al shows an embodiment of a speaker system
according to the present invention). 1: Signal source 2: Pivotal coil 3: Speaker cone 54: Second
speaker cone 5: First voice coil 6: 4 2 point coil 7... Delay 58... Arithmetic unit 30... Indicator 2. 3
shows another embodiment of the present invention 22. 31 shows a preferred embodiment of
the present invention 31... A square wave oscillator 32... A synchronous detector FIG. 5 shows an
example of a temperature controlled oscillator used in the present invention. 40・・・・アンプ
、4]、42,43・・・・・トラン920EndPage:3スタ。 6 shows another
embodiment of the present invention. 50 microphones 517 5th channel equalizers 52.53 ·
tribute, device 554 oice coil 55 ··· speaker cone 8 Fig 8 is another embodiment of the present
invention Speaker cone 66 no. 1 Z stem 4 U 蓼 JI H EndPage equivalent to Kaneko Su 64-3: 4