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JPS5254417

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DESCRIPTION JPS5254417
1. Name of Invention Speaker System ■ Japanese Patent Application Laid-Open No. 52-54417
Serial No. Description / Name of Invention / Name of Invention / Name of Invention Speaker
System
-4866 valve de 樺-樺 (2 people) telephone Tokyo 3521561 (f) [phase] Japan Patent Office
published patent bulletin
3. Detailed Description of the Invention The present invention relates to a speaker system
capable of easily correcting directivity characteristics and interference. In general, when the
same plane J :, Kvff speakers are provided and used, the design time of the speaker system is
determined from the center of the -41 of each speaker of the baffle plate as a starting point from
the baffle plate surface With the vertical front axis. 7'I: Since a fixed relationship always holds
when comparing the short separation from any position on this axis to each speaker of the baffle
plate, any listener on the jd front axis when the listener is located on the axis Even in the case of
short separation, the characteristics are constant. The listener is always located in front of the ba
'/ full board, and in the use of the festival, it is in the position of the chilko' and the position of
the good on the axis. The reason is that the sound pressure of the high frequency region is
lowered when the position is deviated from the front axis of the baffle plate. However, the
distance 4 of the listener for each speaker installed on the end plate: 1 is different from that from
the front. That is, the distance from each speaker to each speaker is the same, but the distance
from each other to the speakers is different, so that the distance to each speaker is different, and
there is a difference in distance between each speaker It will be one. In this case, when sound
waves of the same frequency are radiated from a speaker of 2 · M or more, the sound waves
reaching the listener have a wavelength i corresponding to twice the length of the distance
difference due to the two sound waves having a phase difference At odd-multiple frequencies,
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there is a 180 ° phase difference between them, which is canceled out of phase, so that the
sound pressure at the listener's location is reduced and, in severe cases, it is zero. Still, since the
reverse phase-1 is between the phase (900 to 27 °) with respect to one side, the effect is large,
and the sound pressure characteristic is disturbed. By the way, in the case of a 2-way system or a
3-way system using two or more speakers, since an overlap band occurs between the speakers,
two speakers can not avoid emitting sound waves at the same frequency. In order to be able to
ignore the relative phase difference on the characteristics, it is necessary for the relative sound
pressure difference to be about 20 dB. In order to obtain this relative sound pressure difference,
the overlap band requires two to four octaves of cross-onper frequency. Therefore, in a system
that has been carefully adjusted, it changes into a property that is difficult to predict at a point
deviated from the vertical axis, and it is necessary to transmit a predetermined property.
Therefore, in the prior art (by moving the direction according to the position of the speaker box
itself to obtain the predetermined characteristic '(-h ball, in this case, the left or right direction is
different from the listener to the hill) Generally speaking, it is difficult to go down. The present
invention spares the movable speaker to such a point so as to be able to vary the coaxial of the
speaker relative to the speaker that has been granted to the position "W". ): Peel off the speaker
equally, so as not to always generate a relative phase difference between the two speakers,
simply correct the directional characteristics in any direction, and disturb the phase
characteristics It is intended to be able to bear the optimum directivity characteristics without.
Next, an example of the present invention will be clarified based on the attached drawings. In the
ld speaker box, a speaker (3) for bass as a baffle plate + 21 ic speaker blown on the front surface
of this speaker box II) is attached. Now, this speaker box (the speaker 5 for high-pitched sound to
be an oT dynamic speaker at the upper center 14 of the upper portion 11 of the plate 14+) is
mounted so as to be capable of four turns. -) The above-mentioned high-pitched sound (feather's
speaker: mounting of '5; J structure, fixed guide body (6) and support body (7)) is comprised.
Then, the fixed guide body (6) is provided with the attachment portion (9) at the first fixed
portion of the substrate +81 formed substantially in the shape of a large cedar, and the arcshaped guide surface 710) is upward at the central portion. The guide surface portion 10 is
formed in a bulging manner, and a guide surface portion (a guide 4fl is formed so as to divide the
guide surface portion 101 into two at the center portion of the guide surface portion 10). The
above guide surface, please! [The above-mentioned bass EndPage: formed with the same circular
arc-shaped curvature as the circumference of the centripetal circle centered on the driving part
of the 2P force (3). 'Also, the support (7) is formed in a substantially rounded shape, and one
sliding base 11'? IId Each of the inner surfaces i13 has a shape matching the curvature of the
inner surface i13, and a mounting hole is formed at the central portion (a portion of the
mounting base 112+ is erected at one end of the sliding base 112+. The notch 1f 151 is formed
in the upper end portion of the support 1 portion q4 of the frame, and the notch -t! ] Several
mounting holes 1 '1e are drilled in the bright peak of @tts. Then, the attachment 4a η of the
high-sound speaker (5) is engaged with the notch recess 09 of the support (7), and the
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attachment hole Q1 and the attachment hole of the support I (perforated in the attachment sa'n)
Insert a screw between lfe and 'and standardize the high sound speaker (5) on the support (7).
Next, the collar attachment portion (6) and the attachment portion (9) are positioned
approximately at the center of the collar portion of the piece [It. Hole in the part (9) '! Nationalize
at Bis via I9. Then, a guide groove (a plug k (21) inserted and locked on one side through a guide
sheet plate 12I on the inner side of the guide surface portions 1 and 11) is partially guided (a
support (7) engaged on the guide 11). At the mounting hole f1 of the slide @ base 02 (inserted,
the seat plate rl? The nut is joined via J and semi-fixed so as to be slidable back and forth at a
predetermined position. In this case, if it is located at the saddle point on the axis + IB + of the
low-pitch speaker (3) on the front of the listener speaker box (1), it relaxes the nut (ハ) and A
support (7) for supporting the speaker (5) of the fixed guide (6 sliding along the IK along the
guide surface portion of the fixed guide (6), a speaker (5) for high-pitched sound is shown in FIG.
Move to the position, and direct this radial axis to the recording point, and if the position is t, the
position is fixed; the position of the position to fix the position on the ground is 171k) The lowpitched speaker (3) and the high-pitched speaker (5) are equidistant from each other, so there is
no interference, and one phase characteristic is not disturbed. Also, if the listener is at point Ic)!
The dIc 1 subject is located at a position off the axis dIBI of the low frequency speaker (3), so L is
the distance between the low frequency speaker 13) and the high frequency speaker (5) when
the + CJ point is at the center. ? d differ, thus resulting in phase problems. Therefore, the support
(7) which relaxes to the nut 231 and supports the high sound speaker 15) is one on the guide
surface qQ in the same manner as described above, and the high sound speaker (5) is shown in
FIG. Move to t, that is, move the distance between the point Ic) and the low frequency speaker
13) to an equal distance, turn the radial axis of the speaker (5) to the + C1 point, and Natsuto (It
will be fine on the ground. As a result, the problem of mutual interference due to the phase shift
is eliminated, and the directivity characteristics of the high tone speaker (5) at the castle
frequency does not become a problem for the listener. The radial axis can be oriented with the
axis. Also, by loosening the nut (3) of the support (7) and pivoting the support (7) about the
centripetal axis-even if there are a plurality of high-tone speakers 15) in the same manner as
described above The phase can be corrected and can be turned in a direction different from the
above direction.
In the practical example described above, the curvature of the sliding base Q3EndPage: 3 of the
support (7) is the same as a circle whose radius is the distance between the sliding surface and
the drive center of the low frequency speaker (3). However, the to-limit of the frequency to be
corrected (the high frequency limit of the low frequency speaker (3), the high frequency sound
speaker (5) and the tone difference of about 20 dB are known) is known In this case, even if the
wedge surface is set as a centripetal circle within a phase difference of ± 90 ° at that frequency
with respect to an arbitrary position, there is no problem in practical use-F. In the above
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embodiment, although the case where the high frequency speaker (5) is used as the low
frequency speaker (3), the speaker for correcting the phase is the high frequency speaker (5).
Not limited thereto, it may be a speaker for medium sound. In addition, in the self-embodiment in
which the support (7) may be made to support the speaker F5 for high sound and the speaker for
medium sound, the support for supporting the speaker lff1 + for high sound Although the
explanation was made about the case where it is slidably mounted on the body (the upper
surface plate (4) of the 77 id speaker box m), the high sound speaker (5) or the medium sound
speaker is the speaker box (1) It may be slidably attached at In addition, the bass 7-hole board
(speaker to be attached to 21 is not limited to the speaker (3) for bass). According to the present
invention, the radial direction axis of the speaker can be varied with respect to the positionally
mounted speaker, lt'l? : Since the movable speaker is attached, the movable speaker is moved
without changing the direction of the speaker box according to the position of the listener and
the radiation direction axis is waited variably so that the relative phase difference 7m is easily
removed to direct It is possible to correct the characteristics and the phenomenon of
interference, and it is not possible to obtain suitable directional characteristics without always
disturbing the phase characteristics.
A simple explanatory view of the drawing shows an embodiment of the present invention, in
which an inset 1 is an explanatory view of a speaker system, and an inset 2 is an exploded
perspective view of a mounting structure of the movable speaker. (11 · 1 speaker box, (3) · ·
taken in one mobile. Speaker attached, (5) · Fist movable super speaker. Il 畠-/ EndPage: 4-List of
attached documents]) I! II $ jl) l fence 2) drawing 11 J 3) delegation 扶] 遜 4)! Side 4, 1-() out Y +
N check request -1, I! + Agent other than the above 3) Agent A, Shincho 4-chome, Shinjuku, Kyoto
4-22nd, Luha Anbayashi Building) (〒16 鳴)) 6276 Patent Attorney 樺 裏 6366 Patent Attorney
補正 補正 Procedure Amendment (Spontaneous) Showa 51 ++, 05J4. ri Patent Office Secretary
Hayama Lee] 1 1, 4i, display of the case Showa 50 patent No. 130,649 No. 2 · name of the
invention speaker system 2 · name of the invention speaker system 3, "" "" "correction person
case Related patent applicants Coral Sound η and Inc. 4, an agent
-4866 valve de 樺-樺 (2 people) telephone Tokyo 3521561 (f) [phase] Japan Patent Office
published patent bulletin
〒 1606.1; · 1 to 1: new pipe? (14-chome 3 爵 22 (Murobody Building) 4886 B T 111, Serizawa
Yuji, Sph A-j; C 352-15611) 5, Supplementary 11: The subject of the instruction No 11糺
(Detailed description of the invention 1 column 7 contents of correction (1) specification Fang 3
page row 14 line "The reverse phase range is one between the soil (90 °-27 °)" It corrects to be
"between the opposite phase (90 ° to 270 °), reverse phase cycle time". (It is necessary for
about 20 dB from 21 lines to 4 lines off line to 8 years old. "It is necessary to have approximately
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20 dB or more." And correct. EndPage: 5
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