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JPS54123724

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DESCRIPTION JPS54123724
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 show a first embodiment of a
loudspeaker according to the present invention, FIG. 1 is a partial cutaway (a front view shown
by ?, FIG. 2 is a longitudinal sectional view, FIGS. 3 and 4 show a second embodiment of the
present invention, and FIG. 3 is a partially cutaway (front view shown by...) And FIG. 4 is a
longitudinal sectional view. 2
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ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии I show a considerable part.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to means 9 for
preventing the occurrence of standing waves in a pack chamber which is sanded to prevent
external sound pressure from a strain force 9, especially after WJII. Conventionally, due to the
frame configuration of the pack chamber wedge operation unit (speaker main body), there are
many cylindrical shapes. However, if you use a cylindrical pack chamber like this, it is easy to get
a standing wave, and it is easy to think about it, 72? It is extremely difficult for mining countries
to suppress even if some sound absorbing material is inserted. This O device is made in view of
the above-mentioned point, and by inserting the honeycomb structure in the pack chamber, it is
possible to prevent the stagnation of the standing liquid 0 and obtain the flat frequency
characteristic and the straight sound quality. Aims to provide a speaker that can An embodiment
of the present invention will be described below with reference to the drawing iii. Figure 1 and
j1! FIG. 1 shows a first embodiment of the present invention, and FIG. 1 is a front view of the
speaker with a part thereof cut away, and FIG. 2 is a longitudinal sectional view of the speaker. In
FIG. 10, a tFi operating unit (speaker main body) and a pack cover 2 attached so as to cover the
rear side of the operating unit IK, the pack chamber 3 is formed inside the pack cover 20. Then,
the Ka honeycomb structure 4 in the pack chamber 3 is inserted. In this case, the honeycomb
structure 4 # i opening is inserted toward the operation unit 111. In addition, a common one
such as an example often used for mining, building materials, etc. as the two-cam structure 4 and
02-05-2019
1
an inexpensive Eno medium-two-two-two-two cam using kraft paper It is. In the speaker
configured in this manner, the inside of the shirv chamber 3 is finely divided in the radial
direction by the ore honeycomb structure 4. Then, the generation of standing waves in the
chamber 3 is prevented by the subdivision, whereby a flat frequency characteristic can be
obtained, an element ffi & sound quality can be obtained, and the performance is improved. .
Since a general one can be used for the honeycomb structure 4, the above effect can be obtained
at low cost. FIG. 3 and the twentieth embodiment of the # I4 system according to the present
invention, wherein the sound absorbing material 5 is provided on the honeycomb structure 4 and
the sound absorbing material 5 and the honeycomb structure 4 are inserted into the pack
chamber 3 It is That is, if 411 is formed in this way, an air layer having a thickness equal to the
thickness of the honeycomb structure 4 is formed by the honeycomb structure 4 and the sound
absorbing effect is improved in a flying manner. As a result, the generation of the standing wave
which is strange in the pack chamber 3 can be prevented more surely, and the performance can
be further improved by i, 53, and = 2.7.
As described above, according to this invention, generation of standing waves in the pack
chamber can be prevented, and a speaker with excellent performance can be provided at low
cost, and its practical value mineral is large.
02-05-2019
2
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