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JPS6271397

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DESCRIPTION JPS6271397
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
multi-way speaker apparatus which divides an audio signal into a plurality of bands and
reproduces the audio by respective speakers dedicated to these bands. [Prior Art] FIG. 5 shows,
for example, a radio and an experimental ?multi-amplifier system? (Seibundo Shinkosha) p,
125, two-in-one speaker system using a Yamanaka type channel 1 vider disclosed in 125 The
configuration is shown in a low pass reference form. In the figure, (19 is a low-pass filter, a9 is dJ
[L (21> is a bass speaker lj) -car, and (23) is a treble speaker. In the two-in-one speaker system
with the Yamanaka type channel 1 vider configured as described above, respective drive voltage
holes, KH and input voltage E1 to the bass speaker (21) and the treble speaker (26) Is as follows
when the transfer function of the low pass filter ?D is ML. IL = HTJ-IC1 ..... [1] XH = (1-HTJ). El
..... ... [2] E of the sum of ETJ and EH is H8 = HrJ +] 1GH = Ki-... [6], which is always equal to the
input voltage] 1lii. That is, in the Yamanaka type channel davigue, the original signal E1 is
completely restored by the low and high tone speakers (21) and (23). ! Fig. 6 shows the
amplitude frequency characteristics of the joint with '/ (1 + s) иииииииии [4] I'1L (S)-This is the result
for the entire group, about E1 ░ Xs The sd scaled complex frequency (S = ? +, + x) in the
equation (4) is shown. As apparent from the figure, it is apparent that the driving M voltage IcH
to the high-pitched speaker (26) output from the subtractor ? и et al. Is frequency band limited
and has a high-frequency reproduction signal with a slope of +6 dB 10 ct. I understand. Also, as a
matter of course, lx: 11 and IKSl are equal. While the conventional low and high frequency
channel adder as described above has the advantage as a circuit of transfer function = 1 capable
of completely recovering the input signal, the subtractor (Is In order to handle only a small signal
because it is necessary, the speaker can not be driven unless the signal is finally amplified by the
power amplifier. Therefore, when applied to a multi-way speaker system, a coil, a capacitor, a
resistor There is a problem that it can not be adopted in a conventional multi-way speaker
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system to which a channel anchor composed of passive elements is applied.
The present invention has been made to solve all the problems as described above, and it is
possible to obtain a passive multi-way speaker device having the advantages of Yamanaka type
channel 1) ider without providing a power amplifier. To aim. [! ! A multi-way speaker device
according to the present invention comprises a frequency band filter for dividing an input signal
to a speaker into a plurality of frequency bands, and allowing this output signal to be directly
input to the speaker In order to subtract from the above signal, there is provided a single speaker
having a double voice fill consisting of two signals input in opposite phase. [Operation] In the
present invention, the drive signal to the speaker system is directly input to the first voice coil in
the single speaker having a double voice coil, and this drive signal is in the frequency band to the
second voice coil. Since the signal that has passed through the division filter is input to be
subtracted from the input of the first voice filter, each single speaker is separated into signals in
the frequency band to be shared, and the individual speakers are driven. DETAILED
DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a block diagram showing an
embodiment of the present invention in a two-in-one system speaker system in a low pass
reference form. In the figure, ?? is a low-pass filter, (21) is a bass speaker, and (23) is a double
voice coil vcj in reverse phase relation to each other. A speaker for high-pitched sound having va
2, Ei is an input voltage, HL is a transfer function of a low-pass filter, a work, and a current
flowing through a work M1 'and a work H2, each voice fill, FrJt? It is a force applied to the voice
coil portion of the low-pitched speaker (21) and the high-pitched speaker (26). At this time, P] ll
,,? H can be represented by the following formula. Just to make sure, AL, zI, the power coefficient
of the bass squirter (21) and the electric in-vida 77F, AHI I zMlt AH2 ez H2 is the voice coil of the
high-tone speaker (23) c1. force coefficient and electrical impedance for vo2. Now, for the sake
of simplicity, the impedance of each speaker is simply approximated by DC resistance R, R, R and
L L H H 2 L -1. Further, the force coefficient of each voice coil and the DC resistance satisfy the
condition of , And 79 sum IPsFil like below. In other words, in the present invention using a dual
voice coil, by having 'B' in proportion to the input voltage E1, it has the advantage of the
Yamanaka type channel 1 bigo in the form of the force applied to the voice fill portion. I
understand.
Moreover, in FIG. 1, since no subtractor for obtaining the difference between the electric signals
is used, power can be handled, and the speaker can be driven without providing a power
amplifier. The block diagram in Fig. 1 corresponds to the low-pass reference form if included in
the Yamanaka channel divider-but the bass speaker (21) is set to 2! By using a voice coil, it is
possible to think of a bypass reference configuration. FIG. 2 is a block diagram of another
embodiment of the present invention in a two-in-one speaker system, shown in bypass reference
form. In the figure, 03 is a high pass filter, and (21) is a double voice coil va1 having a reverse
phase relationship with each other. (26) is a high-tone speaker, HH is a high-pass filter transfer
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function, ?, ? L2 # Eyo is a current flowing through each voice coil, and the others are the same
as FIG. At this time, in the same way as in the case of the low-pass reference form, ITJ and
PH1IFs have the following formula% formulas% where ALle RLl l AXJ2 # RL2 is the bass speaker
(21) (7) voice coil va 1 , The power factor and direct current resistance for vo 2, AHtRH is the
power factor and direct current resistance of the high-tone speaker (26), and it is assumed that
there is the following relationship. Therefore, even in the bypass reference type, Fs is
proportional to the input voltage zt K, and has the same features as the low pass reference type.
In the above embodiment, the two-in-one speaker system has been described, but other multiway speaker systems can be applied to nine @ FIG. 3 shows an example of a non-inventive
example in the six-in-line speaker system It is shown by the block diagram by a low pass
reference form. In the figure, ?? and ?2 are low-pass filters, (21) are bass speakers, and (22)
and (23) are mid- and high-tone speakers having dual voice coils in antiphase with each other, Zl
is input voltage, work, work M1. H2 is the current flowing through each voice coil, FL # X'M e-is
the force applied to the voice coil of each speaker, H ,, and HL ? is the transfer function of each
low-pass filter Show. At this time, as in the case of the two-in-one system speaker system,
considering FL, FM, IPH and their sum FB, these are expressed by the following equations. ???
???????????? AHl, AH2 are the key force regarding voice coil of each sbeka!
LRLt "M1'8M2tRHljRH2 is a direct current resistance of the voice coil of each speaker pl. These
shall satisfy all the following conditions. Therefore, the sum Fs of IPL, IFM, FH is proportional to
the input signal Ki, and the sum of the forces applied to the voice-fill section is the same as in the
case of the two-in-one system speaker synutem. It has the advantage of 1 vider. Also in this case,
since the subtractor for obtaining the difference between the electric signals is not used, it is
possible to drive all the speakers without providing a power amplifier. [Effects of the Invention]
As described above, according to the present invention, by combining a single speaker having
dual voice coils in opposite phase to each other and a frequency band division filter, a signal of a
band shared by each of a plurality of speakers Since it is configured to reproduce separately, it is
possible to obtain a high-performance speaker device as well as being inexpensive because it
does not require a power amplifier.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a block diagram showing a low-pass reference shape in a two-in-one speaker system
according to one embodiment of the present invention, and FIG. 2 is a bypass in a two-in-one
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speaker system according to another embodiment of the present invention. FIG. 6 is a block
diagram showing a reference form, FIG. 6 is a block diagram showing a low pass reference form
in a 6-in-one system speaker system according to another embodiment of the present invention,
and FIG. FIG. 5 is a block diagram showing a basic configuration of a Yamanaka type channel
divider which is an example of a speaker system, and FIG. 5 is a transfer characteristic diagram in
the circuit of FIG.
In the figure, ?1) is a low pass filter, ?3 is a high pass filter, (21) is a bass speaker, (22) is a mid
tone speaker, and (23) is a treble speaker. In the figure, the same reference numerals indicate the
same or corresponding parts. O agent Patent attorneys Masaru Satoshi Year 1 Figure 23: S
command m 1-Car 3 Figure D. . ?????? ? ? ? ? ? ?, ? 2-21: <4-% r% ? ?-? ? 22
? ? ? ?-n-23 ? 2 t::-M-Fig. 5 -1 digitization number of squads X
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