JPS56796

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DESCRIPTION JPS56796
Description 1, title of the invention
Sound source position variable 3D speaker box
The present invention is a three-dimensional sound reproducing apparatus, in which the position
of the speaker forming the sound field is variable, the low frequency characteristic of the
reproduced sound is improved, and the occupied space of the main body when the apparatus is
not used is reduced. The mutual sound source positions of the loudspeakers used for the speaker
are hard to obtain a three-dimensional effect when the distance is narrowed, and in order to
obtain a good three-dimensional effect, the sound source positions are mutually separated within
an allowable range Is required. The low frequency characteristics are mostly due to the inner
volume of the speaker box on the reproduction of the blue tatami mat, and for improving the low
frequency characteristics (), it is necessary to increase the inner volume of the speaker box. It is
said that it is impossible to stop. It is an object of the present invention to reduce the space
occupied by the speaker box when not in use, to separate the sound source positions from each
other while maintaining the low frequency characteristics at the time of sound reproduction
better and to obtain a three-dimensional effect effectively. The present invention will be
described below with reference to the drawings. Speaker boxes 1 and 2 shown in FIG. 1 are
connected to side plates 5 and 6 with bellows 3 and 4 respectively. The speaker boxes 1 and 2
have connection holes 7 and 8. The bellows 8 and 4 are in close contact with the outside air so as
to cover the connecting holes 7 and 8 so as to cover the connecting holes 7 and 8, respectively.
The portions of the bellows 3 and 4 in contact with the side plates 5 and 6 are also closely fixed.
When the bellows 8 and 4 are extended, the speaker boxes 1 and 2 are pulled apart and the
spacing between the sound sources 9 and 10 is increased, which is advantageous for creating a
three-dimensional sound field during sound reproduction. () EndPage: 13 With the expansion of
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the bellows 3 and 4, the internal volume of the bellows 3 and 4 increases, the space behind the
sound source inside the speaker box also increases, and the low frequency characteristic at the
time of sound reproduction is improved. The compression of the bellows 3 and 4 narrows the
interval until the speaker boxes 1 and 2 come in contact with the bellows protection parts 11 and
12, and allows the body exclusive space when the device is not used to flow into the interior
through the valves 13 and 15 It prevents deformation and breakage due to the reduction of the
internal pressure of the bellows 3 and 4. The pores 17 and 18 discharge the internal air to the
outside through the valves 19 and 20 when the bellows 3 and 4 are compressed, and prevent
deformation and breakage due to the increase in the internal pressure of the bellows 8 and 4.
4. Brief description of the drawings The drawing is a partially cutaway front view of a sound
source position variable three-dimensional speaker box. JP 56-796 (2) EndPage: 2
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