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JPH02223297

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DESCRIPTION JPH02223297
[0001]
The present invention relates to an omnidirectional electric speaker system. The omnidirectional
speaker system disclosed in French Utility Model No. 2242830 includes a fixed circular plate,
coaxially arranged high-tone, medium-tone and low-pitch speaker units, and high-tone and
medium-tone speakers The units are oriented in such a way that their respective diaphragms face
each other, these diaphragms being separated by a transverse circular partition, which is adapted
to be omnidirectional by means of corresponding loudspeaker units It consists of plywood
supporting two channels with an open periphery so as to diffuse the emitted sound respectively,
this omnidirectionality is each side of the partition showing a rotating convex shape which is in
line with the axis of the speaker unit Thanks to the diffuser placed above. The sound emitted by
the loudspeaker unit and thus diffused takes into account the diffusion modes which induce
reflections on the plywood as well as the uncontrolled separating plate, and the sound quality is
poor. The present invention aims to avoid the above mentioned disadvantages. The present
invention is an omnidirectional electric speaker system comprising two bass / mid and treble
speaker units arranged coaxially and diaphragms held on a speaker cabinet and facing each
other In this speaker system, one of the speaker units is on the end of the extension of the
speaker cabinet, and the other one is a regular truncated pyramid or rotating truncated cone
shaped speaker cabinet of which the reflecting surface is composed. Held on the end, this
reflective surface is horizontal by means of a part of the sound emitted by the opposite speaker
unit and a unique deflection device in the form of a rotating convex shape, which is arranged
coaxially between the speaker units. To diffuse each other part of the sound, which has been
dispersed to be And wherein the Rukoto. Other features and advantages of the present invention
will become more apparent from the following description given with reference to the
accompanying drawings, given by way of non-limiting example. As shown in FIGS. 1 and 3, the
loudspeaker system according to the present invention includes a parallelepiped upper speaker
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cabinet 1, the bottom surface of this hexahedron extending into a regular truncated pyramid 2
including an end 3 In the center of the hexahedron, a speaker cabinet extension 4 is supported,
which constitutes a volume corresponding to the bass and medium speaker unit 4, the speaker
cabinet 1 and the loudspeaker unit 4 known per se.
On the opposite side of the speaker cabinet 1 is a lower speaker cabinet 5, which is in the form of
a four-sided regular pyramidal frustum whose axis extends up to the upper pyramidal frustum 2
and the speaker cabinet l. A high-pitched speaker unit 7 is attached to the top or small bottom 6
of the lower speaker cabinet which is the axis and points towards the speaker unit 4 such that
the loudspeaker units 4 and 7 have their opposite diaphragms coaxial The speaker cabinets 1
and 5 are spaced apart and supported by, for example, a frame 8. In order to diffuse a part of the
sound emitted by the speaker units 4 and 7 horizontally and in all directions, a rotary convex
diffuser 9 of pear type type is provided at the middle of both diaphragms, and the speaker units
4 and 7 are provided. The diffuser is supported in a manner known per se in the extension of the
axis of this axis, and this diffuser has an exponential conical rotor shape towards the treble
speaker unit 7 and a parabola shape towards the mid / bass speaker unit 4 And part of the sound
emitted by the speaker units 4 and 7 and not diffused by the diffuser 9 by the surface 12 of the
lower carson 5 for bass / mid tones and also the surface of the extension 2 for high tones
Reflected by 13, the dispersion takes place horizontally around the periphery of the loudspeaker
system. According to the variant shown in FIG. 2 and in order to complete the omnidirectional
dispersion of the sound not diffused by the diffuser 9, the bottom of the speaker cabinets 1 and 5
is circular and is identical to the bass / midrange speaker unit 4 The speaker cabinet 1
constituting the volume has a cylindrical shape, the extension of which is a truncated cone, and
the opposite speaker cabinet 16 supporting the speaker unit door is a truncated cone 17 as well.
It goes without saying that the bottoms of the opposite speaker cabinets can be shaped
differently from regular triangles, squares, polygons to circles, the corresponding extensions of
these bottoms being regular frustums or rotations It is a truncated cone. Without departing from
the scope of the present invention, it is advantageous for the opposite speaker cabinets to have a
different base, in particular a square base for the upper speaker cabinet and a circular base for
the lower speaker cabinet.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a perspective view of a speaker system having a reflecting surface in the form of a
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regular truncated pyramid, and FIG. 2 is provided with a reflecting surface in the shape of a
regular truncated cone as a modification of the speaker system.
FIG. 3 is a front view of the speaker system shown in FIGS. 1 and 2; Patent ratio 111 people
mutic varnish, a, ale, ell. Agent Attorney Morimori Suzuki Fig, 1Fig, 2
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