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JPS5080434

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DESCRIPTION JPS5080434
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an embodiment of a
speaker box according to the present invention. 1 ...... speaker box, 2 ...... Batsufuru plate, 3,4 ......
Subika mounting holes, 5 ...... in a tweeter, 6 .... · · · Loudspeaker, 7 · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · Bass speaker, 7 · · · · · · · · · · · · Bajikukyappiti. 1 85 1
DETAILED DESCRIPTION OF THE INVENTION The present invention is a modification of a
speaker box equipped with a capacity box. If a general K, a speaker box + d, and a speaker of 2
ftm 1 or more are provided, distortion of reproduced sound may occur due to mutual
interference of internal sound pressure during operation (1) j. Such distortion is different. The
sound pressure of the back coming from the speaker can be prevented by making it independent
in the inside of the speaker box. In this type of speaker box based on conventional technology
#IK, if a cylindrical one is attached to the back of the speaker itself, or if a certain volume is
required due to the sound quality, a box is separately provided inside the speaker box. I have no
idea. As in the latter case, a means for forming another box inside the speaker box, that is, a back
cavity, is preferable in terms of obtaining a desired volume, but assembly of the box with a platelike body becomes complicated and bird value Have a power point of Here, the present invention
aims to provide a speaker box that is easy to manufacture and has a pack capacitance with
excellent acoustic characteristics. Then, the speaker box of the present invention has mounted a
pack cavity integrally molded with various shapes and predetermined volumes by a speaker
mounting position K at the rear 11 of the baffle plate and a material having sound absorbing
properties. It is 1% insult. Hereinafter, the speaker box according to the present invention will be
specifically described based on an example of a practical right shown in the drawings. The
speaker box (1) is a normal one, and the baffle plate (2) K at the front position thereof is
provided with, for example, the upper and lower positions [two speaker mounting holes 13) t41
5), the lower one is attached to the bass speaker (6) respectively. Then, on the back surface of the
baffle plate (2), a back cavity (7) is attached by an appropriate means so as to surround the rear
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of the middle high frequency (3); iA speaker (5). This back cavity (7) is made of a sound
absorbing material, for example, foam polystyrene or the like, which has various cedar such as
hollow cylindrical, prismatic or hollow asymmetric shape, and light volume to form irregularities.
Mold integrally. The integral sound absorbing material is not limited to 4 # as long as it is an
equivalent material instead of the foam polystyrene. Since the above-mentioned back cavity (7) is
integrally molded, it can be selected by a low cost K11 with high dimensional accuracy in part,
and a desired volume and shape are not influenced by the type of the speaker, but can be
selected at 1 ratio. Because it is a relatively small amount of hot water, it can be fixed to the
floating island from K such as (4) 1.53 adhesive agent if 1 part 18 of the south entrance pot is
used.
In addition, by selecting the shape and volume of this back cavity (7) to be piezoelectric, it is
possible to prevent the occurrence of the presence wave and to consider the sound absorption
and reflection characteristics to K, the acoustic characteristics of the material, and%. In other
words, the loss of reproduced sound in a certain frequency band is increased, and the reproduced
sound in a desired frequency range is emphasized by elimination of unnecessary sound,
providing a degree of freedom in acoustic characteristics. Furthermore, since the backcaptivity
(1) partitions the inside of the speaker box (1) to each other in a fake external sound range,
distortion phenomena due to mutual interference of the back pressure inside can be completely
prevented. As described above, according to the present invention, the volume of the back cavity,
the shape of the back cavity, and the material are arbitrarily selected by the integral wedge type
using the sound absorbing material, and the mutual interference of the reproduced sound is
caused beforehand. In addition to the prevention, it is possible to have the freedom of the sound
characteristics of the reproduced sound.
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