JPS5228430

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DESCRIPTION JPS5228430
BRIEF DESCRIPTION OF THE DRAWINGS The drawings illustrate the embodiment of the article
storage container according to the present invention, FIG. 1 and FIG. 2 are overall perspective
views, FIG. 4 is an overall side view, FIG. 5 is a rear view, and FIG. 6 is a plan view A4... Fig. 1-77
Fig. 5-47. Fig. 5-77.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a horn speaker
with improved directivity so that sound power can be radiated over a wider range. The
conventional multi-cellular ho 7 speaker has a structure as shown in FIG. 1, and the sound wave
emitted from the driver 1 passes through the throat part 3 of the multi-cellular on 2 by three
cells 4, 5.6. It was distributed and distributed to radiate sound from the cellular aperture into the
sound field. However, in general, when the sound power is distributed from the throat portion 3
to the cellulars 4 and 5.6 in the speaker having such a structure, the central cellular 5 is used in
the central cellular 5 because the straightness of the sound wave becomes stronger as the
frequency becomes higher. As compared to both 1-end cellular 4 and 6, larger acoustic power is
introduced, and as a result, the distribution of the acoustic halo radiated to the sound field is
large on the front axis, and deviates from the front. There is a disadvantage that it becomes
smaller and this tendency becomes larger as the frequency is higher. It is an object of the present
invention to provide a multicellular horn speaker capable of eliminating such a drawback and
emitting acoustic waves evenly over a wider range than C1. An embodiment of the invention will
be described with reference to the drawings. FIG. 2 shows an embodiment of the present
invention, in which 7 is a driver, 8 is a multicellular horn, 9 is a throat portion, 10.11.12 is a
cellular, 13Ii acoustic lens, and this is a wave front of sound. It is a concave lens that converts
into a convex shape in the direction of travel. Then, when the sound wave generated by the
driver 7 passes through the concave acoustic lens 13 provided in the throat portion 9, the wave
front is converted into a convex shape by the acoustic lens 13 and therefore the same degree as
in the cellular 10.12 The acoustic energy is distributed to the two, and directivity becomes dull
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and it becomes possible to radiate acoustic power evenly within a wider range. FIG. 3 shows
another embodiment of the present invention, in which 14 is a driver, 15 is a horn, 16 is an
acoustic lens, 17 is a throat portion, and in this case, it does not have a cell. By making the 16
characteristics appropriate, it is possible to obtain the same effect as the above-described
embodiment. As described above, according to the present invention, the directivity can be easily
improved by providing the acoustic lens near the horn throat, and it is also possible to arbitrarily
change the directivity in consideration of the design of the acoustic lens. Practical effects are
large.
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