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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a conventional threedimensional stereophonic sound device, FIG. 2 is a cross-sectional view of the main part of a
speaker drive unit according to the present invention, and FIG. FIG. 1 is a circuit diagram of a
three-dimensional stereophonic audio device using a loudspeaker according to the present
invention. 11 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и. иииииии Amplifier, 27 иииииии
Speaker, 28.29 ииииииииии Choke coil.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a bass speaker using a three-dimensional stereo sound box K. Heretofore, the stereo sound
cultivating apparatus collects its sound with a microphone or the like separated by a distance
from the left and right, and reproduces these stereo note numbers via various media such as
stereo broadcasting, records, magnetic tapes, etc. The device was reproduced to sound by
speakers installed at a certain distance, especially on the left and right. It is well known that
when the sound is reproduced in this way, the amplitude value, time difference or phase
difference of the sound reproduced from the left and right speakers 1-scrub, -r is generated to
obtain a three-dimensional effect It is. By the way, as described above, the speakers are
separately installed on the left and right to reproduce the sound, and a sense of direction can not
be obtained with the sound below a certain frequency. This is an average of 16 [scratch] between
human left and right eyebrows, whereas the sound wavelength of 1oo () lx) is usually 540 (am),
which is about 20 times that ratio Since it becomes above, it is because the phase difference and
the amplitude difference of the sound which reach | attain the ear of right and left can not be
discriminate | determined from any place. For this reason, the left and right amplifiers and
speakers share the amplification and reproduction of the mid-range and higher frequencies, and
the low-line frequencies are shared between the-bass amplifier and the bass speaker. An acoustic
device is provided. FIG. 1 shows this conventional three-dimensional stereophonic soda
apparatus. 2- ? In FIG. 1, the mad 11747 circuit l is connected between the left input terminal
and the right input terminal R, and its IJ sock force is transmitted to the bass amplifier 3 via the
low pass filter 2. It becomes K to be input. The output of the bass amplifier 3 is supplied to the
bass speaker 4 to reproduce low line frequency sound. Next, the left channel y4 (i, eh) tlj input
from the left input terminal is configured to be input to the l channel amplifier 6 via the bypass
filter 5 and amplified. The output of this l, ch amplifier 6 is supplied with lch sbi loudspeaker and
is designed to reproduce the sound of middle to high frequency. On the other hand, the right
channel (Reh) signal input from the right input terminal R is input to the Rch amplifier 9 via the
bypass filter 8 and amplified. The output of this Reh amplifier 9 is supplied to the Rch speaker O
and is busy to reproduce the sound of the middle high frequency.
The conventional three-dimension, six-well, one-one rho stereophonic audio system configured as
described above amplifies the sound in the middle and high frequency range with the left and
right amplifiers 6 and 9 and converts it into sound with the left and right speakers 7 and 10. You
can play and get a sense of stereo. Further, the sound in the low frequency region where a sense
of stereo can not be obtained is amplified by the bass amplifier 3 and reproduced into sound by
the bass speaker 4. With such conventional three-dimensional stereophonic sound decoration,
there is a disadvantage that three systems of amplifiers are required, and the number of parts
and the number of steps increase. The present invention has been made in view of the abovementioned point, and derives a single t1l from the middle point of the voice coil of the speaker
for bass, makes this lead a common terminal of Lch and Reh, and makes this common terminal
and others To supply an electrical signal of KLch between one terminal and the other terminal of
the common terminal so as to supply an electrical signal of KReh, which has a simple circuit
configuration, and It is an object of the present invention to provide an entire speaker for a threedimensional system stereo KN which can have two systems of amplifiers and can reduce the
number of parts and the number of man-hours significantly by 4 to 3 k. Hereinafter, the present
invention will be described based on the illustrated embodiments. A second N is a cross-sectional
view of the band portion of the short-circuit portion of the speaker. In FIG. 2, one of the magnetic
poles 11CJ3 of the magnet 11 is always provided with a cylindrical hole piece, and the other
magnetic pole V (y, a yoke 13 for forming a circuit) is provided. The yoke 11 is provided so as to
surround the magnet 11, and the yoke flat 14 is provided at the tip thereof. The inside of the
yoke plate 14 is provided in a concentric cylindrical shape having the same length as the axial
direction of the pole piece 12 and has a gap A between the pole piece 12 and the yoke plate 14.
The voice coil 15 is provided so as to be axially movable in the IJJA during this time. Book: The
special g of the four alternatives is in this voice coil 15, and the 5-bit ? single-pass eno lj J ?
configuration of the Heus coil L'l is bounded by the coil connection point of the lead wire 16
which is a common terminal. As taken from a coil wound with the same number of turns within
the reverse. At each end of the coil, lead edges 17 and 18 are provided as input terminals for the
left and right channel number signals. And lead wire lb, 17 + 18 is each terminal e, a. bvc
connection is the first. The operation of the drive unit of the speaker having the above
configuration will be described below.
When voltage E1 is applied between terminals a and c in the direction of the arrow shown in FIG.
2 and voltage El is applied between terminals b and c in the direction of the arrow shown in FIG.
The force of the former is generated in the direction shown in the drawing, and the force. ▒.
During that P, this speaker will generate a force (Fr + F *). Similarly, depending on the polarity
and magnitude of the voltage supplied to each input terminal of this coil, a force (Fr F Fx) is
generated and the force can be transmitted to the lively plate of the speaker to reproduce the
sound, 6-1 -? 5; FIG. 5 shows a three-dimensional stereophonic sound system using the
loudspeaker according to the present invention. In FIG. 5, terminals for acoustic signal input and
signals from R are input to the amplifier 21 ░ n for Leh and Reh. These amplifiers 21. The signal
amplified by n is output and supplied to a circuit including left and right speakers 23 and 24.
That is, the Lch speaker 23 is connected in series to the capacitor 2] to form a bypass filter, and
is connected between the output of the amplifier 21 and the ground. Similarly, the Rch speaker
24 is connected in series with the capacitor 26 to form a bypass filter, and is connected between
the output of the amplifier 22 and the ground. The speaker n according to the present invention
has the common terminal C grounded, and the Lch and Rch amplification M28, 2! Through the
other two input terminals a and J etactances (choke coils) 28 and 29, respectively! l + no output
K close HL te. A low pass filter is constituted by the choke coil 29, 29 and the speakers 7-7 4 and
K. The operation of the P-force application of the present invention configured as described
above will be described below. For example, assuming that the low pass filter passes low
frequency components of about 100 Hz or more), the low frequency components of l and Ch
multiplied signals have VC added between terminals a and e, The voice coil 15 is driven.
Similarly, 1 (a low frequency component of the ch signal is added between the terminals b and c
to drive the voice coil 15. These two driving forces are added as described above to drive the
speaker moving plate. On the other hand, a signal containing middle high frequency components
of f, 110 ? (seven) or more is supplied to both LCh and leh by the bypass filter including the
respective speakers 23 and 24 and becomes sound from the respective speakers 23 and 24. Be
regenerated. Therefore, a sense of stereo can be obtained.
As described above, according to the present invention, the lead edge is derived from the middle
point of the speaker's Heus coil, and 8-')>'-'. ?????? Rehf) co-terminal ? seven. ???
Since a signal is input between the force terminal and this common terminal, there is an effect
that it is possible to obtain a three-dimensional stereophonic sound device with two amplifiers. In
addition, there is also an advantage that the number of parts and the number of steps can be
remarkably reduced since the stereo blue tatami mat of the 5 dimension system can be made
with a simple circuit configuration.
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