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JPS5115416

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DESCRIPTION JPS5115416
[Present] Diffuse Reflected Diffuse Loudspeaker Device Application No. 45-112856 [Phase]
Application No. 45 (1970) Dec. 17 (@ inventor 14 Ito 2 of Izumi 2 Suginami-ku, Tokyo Tokyo
Sansui Electric Co., Ltd. 0 Applicant 14 Sansui Electric Co., Ltd. Tokyo Suginami Ward Izumi 2 14
1 [Yes] Attorney Attorney Takeshi Suzue Outside 3 people
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of
a diffuse reflection diffusion type speaker device according to the present invention, FIG. 2 is a
view showing a sound wave vertical reflection state in the embodiment, and FIG. FIG. 4 is a side
view showing another embodiment of the present invention. FIG. 4 is a view showing an acoustic
wave horizontal direction reflection state.
Detailed Description of the Invention The present invention relates to a diffuse reflection type of
spy-blade device capable of effectively creating a sound field in sound reproduction. The sound
field in the so-called 0 is a single direct wave and multiple sources emitted from a sound source.
It is formed by the combination with the indirect wave. The human ear obtains a threedimensional effect by sensing the relative relationship between these direct and indirect waves
with the left and right ears. Therefore, in order to faithfully reproduce the raw sound field, an
infinite number of transmission channels are required, which is not feasible. At present, when
performing reproduction in a sound field, although the indoor reflection of the reproduction
room is used, the indirect wave is still poor compared to the raw sound field. Indoor reflection is
effective: Non-directional speakers etc. have been conventionally used to utilize this, but when
the indoor reflection is small, the effect is bad and the direct wave of the direction to be heard is
large and similar to directional speakers Will be effective. In view of such circumstances, the
present invention reflects the sound wave signal emitted from one or more speaker units by the
diffuse object for diffuse reflection [111111] diffusion, as if it were multiple time difference
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signals or phase difference signals, or a combination of these signals. An object is to provide a
diffuse reflection speaker device having a configuration capable of creating a sound field with a
sense of presence similar to a so-called sound field by producing the same effect as arranging
innumerable speaker units. It is An embodiment of the present invention will be described below
with reference to the drawings. As shown in FIGS. 1 to 3, the speaker unit is accommodated in a
cylindrical case 1 with a bottom, and the speaker unit 2 is disposed facing the true and fixed to
the case 1. Above the speaker unit 2, reflectors 3 and 4 for diffuse reflection diffusion are
disposed. The reflecting plate 3 is formed in, for example, a semi-cylindrical shape which is bent
in a zigzag shape in the circumferential direction and fixed to the upper surface peripheral end of
the housing 1. Further, the reflecting plate 4 is formed so as to protrude in an arc sequentially in
one direction, for example, and the arc-shaped projecting surface is directed downward and
inclined and fixed to the upper end portion of the reflecting plate 3. Thus, the horizontal
reflection state of the sound wave signal emitted from the speaker unit 2 is as shown in FIG. 2,
and the vertical reflection state is as shown in FIG. 3. In FIG. Shows the path of The sound wave
signal emitted from the speaker unit 2 is diffusely reflected by the reflection plates 3 and 4 so
that its traveling direction changes into an irregular turtle and becomes a multiple signal having
many wavefronts. Moreover, since these signals have different paths t1 to tn, they mutually have
time difference or phase difference or their combination, and innumerable time difference signals
or phase difference signals or their combination spread in the reproduction chamber while
generating interference fringes. Go on.
Therefore, it is clear that the wall reflection of the reproduction room in the sound field creation
is much more effective than the ordinary unidirectional speaker, and the sound field in the
reproduction room is accompanied by a sense of presence similar to the so-called internal sound
field. Creation is made. The present invention is not limited to the above-described embodiment
(the invention is not limited to this, and the shape of the reflector may be anything as long as it is
a [111111] EndPage: 1 reflector capable of irregular reflection, and also the attachment of the
speaker unit In order to increase the reflection effect, the tilt angle may be changed. Further, as
shown in FIG. 4, the speaker unit 2 may be inclined and attached to direct waves, and the
reflection plate 5 may be disposed in front of the reflection plate 3 above the speaker unit 2 to
enhance the reflection efficiency. Further, as shown in FIG. 5, a plant-like reflector 6 may be
disposed as a reflector for diffuse reflection diffusion on the upper side of the speaker unit 2. As
described above, according to the present invention, the speaker unit which reflects the sound
wave signal emitted from one or more speaker units by the reflector for diffuse reflection
diffusion and emits as many time difference signals or phase difference signals or a combination
thereof It is possible to provide a diffuse reflection speaker device capable of performing sound
field creation with a sense of presence similar to a so-called live sound field in a configuration
that produces the same effect as innumerably disposed. Diffuse reflection and diffuse reflector
comprising: 11 or more speaker units, and a reflector provided integrally with the speaker unit to
diffusely reflect sound waves from the speaker units and emit as a signal having many
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wavefronts Speaker device. [Phase] Citation of Japanese Literature 45-5749 EndPage: 2
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