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DESCRIPTION JPS5396831

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DESCRIPTION JPS5396831
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing a
conventional loudspeaker apparatus, FIG. 2 is a longitudinal sectional view showing one
embodiment of the loudspeaker apparatus of the present invention, FIG. 3, FIG. 4 and FIG. The
drawing is a longitudinal sectional view showing another embodiment of the speaker device of
the present invention, and FIGS. 6 and 7 are sectional views showing another embodiment of the
pipe duct of the present invention. 4.4at4b, 4c "" pipe duct, 5 ° 5At5b ...... the end opening, 6 ...
... outer end opening, 8 ...... recess 9 ...... Inclined part, 10...
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a loudspeaker
system. In general, as shown in FIG. 1, in the speaker device, it is practiced to provide a straight
pipe duct (8) in the cabinet to improve the bass. The present invention is intended to improve the
above-mentioned vibratory duct (2)) In order to improve the crispness of the bass by forming the
area of the inner end opening of the pipe duct larger than the area of the outer end opening It is
One embodiment of the present invention will be described with reference to FIG. Attach the
speaker unit (3) and the pipe duct (4) to the buckle plate 12) of the cabinet (1). The inner end
opening (5) of this pipe duct (4) It is formed larger than the area of the end opening +61. By
enlarging the inner end opening 5) in this manner, the sound pressure inside the cabinet ill can
be effectively covered by the duct, and in particular, the bass-cutness can be improved. Next,
another embodiment of the present invention will be described based on FIG. (3) In FIG. 13, the
inner end opening (5cL) of the vibrator duct (4a) is expanded stepwise. Further, in FIG. 4, the
inner end openings (five pieces) of the vibrating duct (4k) are formed in an annular shape as a
whole by disposing a central member (7) concentrically in the stepwise expanded opening.
Furthermore, in the vibrator duct (4c) of FIG. , □ D (5 °,. You are welcome, 1,5 °. An annular
recess (8) is provided opposite to. All the vibrator ducts of the above embodiments may be either
cylindrical or rectangular. It is also convenient to be able to adjust the circumference of the inner
end opening from the outside in all the vibrator ducts of the above embodiment. For example, in
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the case where the inner layer opening (5) as shown in FIG. 2 (4) is expanded in a #i diagonal
manner, its inclined portion (9) can be scaled by the outer S * as shown in FIG. If this is done, the
area of the open end (9cL) of the inclined portion (9) can be adjusted. In the case where the inner
end opening (5a) is enlarged stepwise as shown in FIG. 3, the left white wall or the upper and
lower walls of the stepped portion ulJ are shown in FIG. And the area of the inner end opening
(5a) may be adjusted. According to the present plan 7, the area of the outer end opening of the
area of the opening of the vibrator 17j バ イ ブ is larger than the first eye l = 5 = ti, eh, eh. ア、よ
、1ゎ。 よう。 It can be scared.
In addition, it may be formed by expanding the F ′ ′ 3434 in the form of a hole or in a step or
in an annular shape, or providing a recess (5) i behind the annular inner end opening. The sound
quality of can be obtained. Further, since the area of the inner end opening of the vibrator duct
can be adjusted from the outside, the user etc. can finely adjust the crispness of the bass as
required.
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