close

Вход

Забыли?

вход по аккаунту

?

JPH0557998

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH0557998
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
loudspeaker system using reflected sound of superdirective loudspeakers, and more particularly
to a loudspeaker system capable of performing a realistic loudspeaker.
[0002]
2. Description of the Related Art In general, a speaker is known as a device for converting electric
vibration into acoustic vibration to emit a sound wave into space. Recently, an image apparatus
having a projection type large screen called a projector screen, a high vision television receiver, a
liquid crystal projector, or a three-tube projector has been developed. In this type of video
apparatus, as shown in FIG. 15, speakers 102 and 104 are provided at the top and bottom or at
the left and right of the screen or screen 100, and audio signals from the video apparatus main
body 106 such as VTR and TV tuner are amplified. And, it is supplied to each of the speakers 102
and 104 through the cord 110, and the sound from this point is directed to the listener directly,
and the speech to be spoken in a movie or the like is expanded. Further, an image is projected on
the screen 100 from the projection projector 112. Also, recently placed a speaker around a largearea signboard with a poster for advertising or the like, or a large-area panel on which an
advertising image is reflected, as a means of advertising medium, and direct sound from the
future will be used to It is done to sue etc.
[0003]
10-05-2019
1
By the way, in the conventional apparatus of this type, for example, in the case of a projector
screen, for example, the speakers 102 and 104 are disposed in the peripheral portion despite the
screen 100 being large. As a result, the physical position of the character's mouth and the sound
source, that is, the sound image localization does not match, and therefore, there is a problem
that the viewer receives a lack of force and presence from the screen. That is, since the positional
relationship between the screen 100 and the speakers 102 and 104 is determined at the time of
setting the apparatus, control of the sound image localization produced from the speakers 102
and 104 on the left and right of the screen depends on the electrical processing of the amplifier
108. And there is a problem that it can not be controlled sufficiently.
[0004]
Also in the advertising means using a large panel, as the mouth of the character appearing on the
panel and the sound source do not match in the same manner as described above, it lacks a sense
of realism and can not fully exhibit the advertising effect There was a problem. The abovementioned problems have become a serious problem particularly in the situation where the
screen size is significantly increased as recently. Furthermore, in the above-described loudspeaking method, sound may be diffused to unnecessary places, which may cause noise pollution.
The present invention focuses on the above problems and is devised to solve them effectively. An
object of the present invention is to provide a loudspeaker system capable of improving
advertising effects and sense of reality.
[0005]
[Means for Solving the Problems] In order to solve the above problems, the present invention is
to be able to reflect a sound by means of a first reflecting plate shaped like a bowl and the first
reflecting plate. And a second reflection plate for reflecting the sound from the speaker member
reflected by the first reflection plate again.
[0006]
Since the present invention is configured as described above, the sound emitted from the speaker
member is reflected by the first reflecting plate, and this reflected sound is again reflected by the
second reflecting plate made of a screen or the like. It will be reflected and reach the viewer.
10-05-2019
2
Therefore, by reflecting the sound wave in the vicinity of the mouth of the person appearing on
the second reflecting plate, for example, it is possible to perform a full-fledged loud sound.
[0007]
Hereinafter, an embodiment of a loudspeaker system according to the present invention will be
described in detail with reference to the attached drawings. FIG. 1 is a perspective view showing
a first embodiment of a loudspeaker including a reflective sound collecting type superdirective
speaker unit used in the present invention, FIG. 2 is an acoustic diagram showing a first
reflecting plate of an elliptical shape, FIG. 2 is a sound line diagram showing the operation of the
loudspeaker system of the present invention. As shown in the figure, the loudspeaker system 2
mainly comprises a reflective sound collecting type superdirective speaker unit 4 and a second
reflecting plate 6 for reflecting the sound wave from the unit 4, and specifically, The speaker unit
4 has a first reflection plate 10 shaped like a bowl, as shown in FIG. 2, in which a part on the
focal point F1 side of an ellipsoid 8 having two focal points F1 and F2 is cut out. doing. The first
reflection plate 10 is made of, for example, FRP (reinforcing glass fiber plastic) or the like, and
the inner wall surface of the first reflection plate 10 is on or near the first focal point F1 which is
the inner focal point. A speaker member 14 supported by, for example, three support members
12 extending more is attached
[0008]
The sound wave generating surface of the speaker member 14 is provided to face the inner wall
surface of the first reflecting plate 10, and therefore, the sound pressure to the sound 16 emitted
from the speaker member 14 is the above-mentioned first to fourth sound components. The light
is reflected on the inner wall surface of the first reflector plate 10 and concentrated at or near
the outer second focal point F2. Then, as shown in FIG. 3, the speaker unit 4 configured in this
manner is slightly above the front of the second reflection plate 6 having a large screen made of
a relatively hard material such as a signboard, a panel or a projector screen. Is mounted and
installed via the mounting member 20. The mounting member 20 is movable, for example, in the
horizontal and vertical directions, and the angle of the speaker unit 4 can be freely changed by,
for example, a spherical joint or the like. Although not shown, the speaker member 14 is of
course connected to the video apparatus main body via an amplifier as shown in FIG.
[0009]
10-05-2019
3
Next, the operation of the present embodiment configured as described above will be described.
First, the sound 16 emitted from the speaker member 14 provided in the vicinity of the first focal
point F1 of the wedge-shaped first reflecting plate 10 consisting of a part of an elliptical shape is
reflected by the first reflecting plate 10 . Then, this reflected sound is again reflected by the
second reflecting plate 6 provided in front of the second focal point F2, for example, a screen,
and as it is, it travels to the second focal point F2 without being diffused, and The sound pressure
is concentrated on the Therefore, the sound 16 emitted from the speaker unit 4 can be
concentrated in the vicinity of the second focal point F2, and the viewer located in this part can
be given a powerful sense of presence
[0010]
In this case, by changing the angle or the like of the speaker unit 4, the sound 16 can be applied
to an arbitrary position on the second reflecting plate 6, and the reflected sound can be emitted
therefrom. Therefore, for example, by applying sound to the vicinity of the mouth of the
character on the panel or screen, it is possible for the viewer to feel as if the sound is being
emitted from the character. Further, since the reflected sound from the second reflecting plate 6
has directivity, it is aimed by changing the angle at which the sound 16 from the speaker unit 4
hits the second reflecting plate 6. It becomes possible to transmit sound only to a limited number
of people. Further, since it is not necessary to provide the speaker unit in the vicinity of the
second reflecting plate 6 such as a screen, the cord for supplying the audio signal can be
shortened.
[0011]
In the above-described embodiment, although it is decided to use the shape of a part of a wedgeshaped ellipsoid as the first reflecting plate 10, the present invention is not limited to this, as
shown in FIG. The shape of the reflecting plate 10 may be configured as a parabolic curve shape
(parabola shape). The speaker unit 14 is located on or near the focal point F3 of the parabola
curve, so that the sound 16 reflected from the first reflector 10 travels in parallel without being
diffused. In this case, as shown in FIG. 5, the sound 16 reflected by the second reflecting plate 6
made of, for example, a screen is not concentrated at one point but is concentrated at a portion
having a certain area. As described above, for example, if it is reflected at the mouth of the
character on the screen, it is possible to feel as if the sound is emitted from the character.
10-05-2019
4
[0012]
In the above embodiment, the shape of the first reflecting plate 10 is a part of an elliptical shape
or a part of a parabolic curve, but it is not limited to this, and is shown in FIGS. 6 and 7. It is good
also as these compound shape. That is, the first reflection plate 10 is divided into four reflection
plate segments 10A to 10D by dividing the first reflection plate 10 into four at 90.degree.
Centering on the central portion thereof. For example, one pair of opposing reflection plate
segments 10A and 10C has an elliptical shape. While being configured as a part, the other pair of
reflecting plate segments 10B and 10D may be configured as a part of the parabolic curve shape.
Then, the focal point F4 of both the shapes is matched, and the speaker member 14 is positioned
and attached on or near the focal point F4.
[0013]
In this case, the sound 16A reflected from the elliptical reflector segments 10A and 10C proceeds
to concentrate on the second focal point, while the sound 16B reflected from the parabolic curve
reflector segments 10B and 10D is: It will go in parallel without spreading, and it will become
possible to produce the combined effect of the above-mentioned embodiment. In the above
embodiments, the case where the speaker member 14 is mainly located on the focal point of the
first reflecting plate 10 has been described, but in the vicinity of this focal point, in particular,
only a slight distance from the focal point The speaker member 14 may be positioned on the first
reflector side, and in this case, the reflected sound will be transmitted with a slight spread.
Therefore, for example, the sense of reality can be enhanced by applying to a television receiver
or the like having a landscape screen.
[0014]
Next, a second embodiment of the loudspeaker system of the present invention will be described
with reference to FIGS. 8 to 11. FIG. The same parts as those of the first embodiment are
indicated by the same reference numerals and the explanation thereof is omitted. In the first
embodiment, the speaker member 14 is fixedly attached to the first reflection plate 10 via the
support member 12 connected thereto. In the second embodiment, the speaker member 14 is
mounted. A distance control mechanism 24 is provided to change the distance between the first
reflection plate 10 and the second reflection plate 10 so that the sound image localization can be
changed. Specifically, the distance control mechanism 24 is supported at the center of the
10-05-2019
5
opening surface of the first reflection plate 10 by a plurality of, for example, two support
members 12 extended from the opening end of the first reflection plate 10. The speaker
receiving portion 26 and the speaker connector 28 movably provided on the speaker receiving
portion 26 are mainly configured. The speaker connector 28 is configured, for example, as a
hollow cylindrical sealed box, and a circular speaker member 14 is attached and fixed to one side
thereof, that is, the first reflection plate side. Then, a spiral groove 30 is formed over the whole of
the cylindrical surface of the speaker connector 28.
[0015]
On the other hand, the speaker receiving portion 26 is formed in a ring shape, and a groove 32
to be screwed with the groove 30 of the speaker connecting member 28 is formed in the inner
wall surface thereof. By rotating in the reverse direction, the speaker member 14 attached to the
tip can be moved closer to or further away from the first reflection plate 10 to control the
distance L1 therebetween. In addition, it is not limited to the shape of this ring-shaped speaker
receiving part 26, As long as it is a structure which supports the speaker connection body 28 so
that movement is possible, what kind of structure may be sufficient. As described above, by
providing the gap control mechanism 24 and changing the gap L1 between the speaker member
14 and the first reflecting plate 10, as shown in FIGS. 11 (A), (B) and (C), a screen, ie, a screen
The spread of the reflected beam of the sound wave from the second reflector 6 can be
controlled.
[0016]
That is, in the case shown in FIG. 11A, the state in which the reflected beam 34A of sound is
narrowed with respect to the listener P with the distance L1 between the speaker member 14
and the first reflecting plate 10 as a medium size. And the listener P can clearly recognize the
localization of the sound image, and in the case shown in FIGS. 11 (B) and 11 (C), the speaker
connector 28 of the interval control mechanism 24 The distance L1 between the speaker
member 14 and the first reflecting plate 10 is shown in FIG. 11A by rotating in the direction
approaching the first reflecting plate) or in the opposite direction (the direction away from the
first reflecting plate). Make them smaller or larger than shown. Then, the reflected beams 34B
and 34C of the sound from the second reflecting plate 6 become considerably spread to the
listener P, and thus give the listener P a spreaded image of the sound image. It becomes possible.
[0017]
10-05-2019
6
Further, even if the position of the listener P changes with respect to the second reflecting plate
6 in FIG. It is possible to narrow down the beam 34A. As described above, since the distance L1
between the speaker member 26 and the first reflection plate 10 is variable, control of sound
image localization is performed without performing electrical processing in an amplifier or the
like. Therefore, sound image localization is performed on the screen It can be matched with the
character's mouth and can significantly increase the sense of realism.
[0018]
In addition, wiring as long as required when setting the speaker near the screen is not necessary,
and the speaker unit can be placed away from the screen even when an image is taken over the
entire wall of the room. In the above embodiment, although the interval control mechanism 24 is
configured to operate manually, it may be configured to operate automatically as shown in FIGS.
12 to 14. Good. That is, the distance control mechanism 34 shown here has a plurality of, for
example, two guide fixed rails 36 which are erected from the central portion of the first reflecting
plate 10 and are separated from each other by a predetermined distance. The cylindrical speaker
connector 38 having the speaker member 14 attached thereto is sandwiched between the guide
fixed rails 36 so as to be slidably supported.
[0019]
Further, a plurality of, for example, two drive rails 40 are extended to the first reflecting plate 10
and fixed to the speaker connector 38, and the tip portions of these drive rails 40 are The two
rail holes 42 formed in the central portion of the first reflection plate 10 are penetrated. A tooth
groove 44 is formed at a tip end of the drive rail 40 over a predetermined length, and the tooth
groove 44 is a motor drive unit 46 provided on the back surface side of the first reflecting plate
10. It meshes with a gear 48 attached to the rotary shaft of Therefore, by driving the motor drive
unit 46 to rotate the gear 48 forward and reverse, the drive rail 40 protrudes and retracts to the
front side of the first reflection plate 10, and the speaker connector 38 fixed thereto is the
speaker member 14. As a result, the distance L1 between the speaker member 14 and the first
reflection plate 10 can be controlled in the same manner as described above. Also in this case,
not only the same operation and effect as described above is produced, but, for example, if the
fusion operating unit is connected to the motor drive unit 46, the above-mentioned interval L1
can also be operated by fusion, and Automatically adjust the interval L1 according to the image,
for example, if an additional device 50 such as a microcomputer is connected to the motor drive
10-05-2019
7
unit 46, the reflected beam of sound like the spotlight of illumination according to the image in
real time It can also be controlled.
[0020]
[Effect of the Invention] As described above, according to the loudspeaker system of the present
invention, the following excellent effects can be exhibited. Since the sound reflected from the
second reflector is transmitted to the viewer, the sound can be reflected at any position on the
second reflector. Therefore, it is possible to produce an effect that sounds are output from
arbitrary positions such as a signboard, a panel surface, etc., and to perform an effective
advertisement with a strong impression. In addition, when the screen is used as the second
reflector, it is possible to enjoy a realistic image. Furthermore, since sound can be prevented from
being transmitted to places other than the targeted limited places, noise pollution can be
prevented from occurring.
[0021]
Brief description of the drawings
[0022]
1 is a perspective view showing a first embodiment of a loudspeaker system including a
reflective sound collecting type superdirective speaker unit used in the present invention.
[0023]
2 is a sound ray diagram showing a first reflection plate of an elliptical shape.
[0024]
3 is a sound line diagram showing the operation of the loudspeaker system of the present
invention.
[0025]
4 is an acoustic diagram showing a first reflector of parabolic curve shape.
[0026]
10-05-2019
8
5 is a sound line diagram showing the operation of the sound amplification apparatus is a
modification of the first embodiment.
[0027]
6 is a plan view showing a first reflector used in a modification of the first embodiment.
[0028]
7 is a cross-sectional view taken along line AA in FIG.
[0029]
<Figure 8> It is the cross section diagram which shows the 2nd execution example of the
loudspeaker system of this invention.
[0030]
9 is a plan view of the loudspeaker system shown in FIG.
[0031]
10 is a perspective view showing a speaker connector used in the loudspeaker system shown in
FIG.
[0032]
11 is an operation explanatory diagram for explaining the operation of the loudspeaker system
shown in FIG.
[0033]
12 is a cross-sectional view showing a modification of the second embodiment of the present
invention.
[0034]
13 is a plan view showing a first reflection plate of the modified example shown in FIG.
[0035]
10-05-2019
9
14 is a perspective view showing a distance control mechanism of the modified example shown
in FIG.
[0036]
15 is a diagram showing an example of a conventional loudspeaker.
[0037]
Explanation of sign
[0038]
Reference Signs List 2: loudspeaker system 4: reflection-type superdirective speaker unit 6:
second reflector plate 8: ellipsoid Ellipse first reflector plate 14: speaker member 16, 16A, 16B:
sound 24, 34: Space control mechanism 26, 26: Speaker reception part 28, 28, 38: Speaker
connection body 36: Guide fixed rail 40: Drive rail, F1, F2, F3, F4: Focal point, L1: Space.
10-05-2019
10
Документ
Категория
Без категории
Просмотров
0
Размер файла
20 Кб
Теги
jph0557998
1/--страниц
Пожаловаться на содержимое документа