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DESCRIPTION JPS5426929

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DESCRIPTION JPS5426929
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention,
FIG. 1 is a front view of a duct portion, and FIG. 2 is a central longitudinal sectional view thereof.
1 is a baffle plate, 2 is a duct, 3 is a bend, and 4 is a core of a honeycomb structure.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of a bass reflex type speaker device, and in particular, the improvement of its low frequency #
note. In general, the bass reflex type Sbi-ka cabinet is used for the compliance of the air inside
the cabinet and the conspiracy of air tribute inside the duct, and in the small volume cabinet, Mr.
Lee, the skin 4i! i The expansion of extinct growth is to be achieved, but when using a
conventional duct, the high frequency radiated to the inside of the cabinet from the back of the
speaker “A part of the sciaphyn comes from the duct opening (1) h! There is a disadvantage that
the radiation is emitted to the outside of the cabinet through the γ-shaped portion. To address
this drawback, it has been proposed to provide the duct with a bend (bent). However, to make the
duct have a bend, the particle velocity of air inside the duct becomes uneven at the bend, and if it
is heavy, there may be a rumor with a cavity whose velocity is zero, for co-imaging. It turned out
that a part of the energy of is a loss component. The present invention aims to eliminate the
upper seven drawbacks of the bended waiting ducts of bass reflex type speaker cabinets. 1 and 2
are diagrams showing a part of an example of the present invention, FIG. 1 is a front view of a
duct, and FIG. 2 is a central double curved view of the duct. In the figure, (1) is a baffle
temporary, 12) is a duct having a bend portion (3), and (4) is a core material of a honeycomb t #
Li'a in the duct. In this core material (4), 17 has a honeycomb shape, and the duct is divided into
a large number of cells (four cells) by the four walls continuing between the axial forces thereof.
It is inserted. Since the present invention is configured as described above, the pend portion of
the duct is divided into a large number of cells among the S power of air particles by the thin
partition of the core of the honeycomb structure, thereby exhibiting a rectifying action.
Generation of turbulence in the bend of the For this reason, it is possible to reproduce the
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effective region. In addition, a large number of cells also exhibit the action of a high cut filter, so
the high frequency components inside the cabinet leaking to the outside through the duct are
even less. It also has the effect of being able to In addition, as shown in FIG. 1, in the -F actual
grid row, a core material having a honeycomb shape on four sides was used, or the present
invention is not limited to a honeycomb shape, but the same effect can be obtained with a pond
shape. Dew. Just to be sure, the strong electric surface, the honeycomb shape is the most -1 when
4 from one rice of last condition.
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