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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a
conventional speaker device, FIG. 2 is a cross sectional essential part of the device of FIG. 1, and
FIG. 3 is a cross sectional view of a speaker device FIG. 4 is an essential sectional view of the
device in FIG. 3, and FIG. 5 is an output sound pressure frequency characteristic diagram of plate
vibration. In the figures, the same reference numerals denote the same or corresponding parts.
Reference numeral 1 denotes a speaker, 2 a buckle plate, 3 a speaker, 4 a decorative frame for a
speaker box, 5 a net, 6 a decorative board for a speaker box, 7 a sound absorbing material , And
8 is an opening. 寥 1 目 寥 2 Fig.-61 - 昭
昭 s 1 - 87429 (2) Mushroom 3 寥 寥 寥 5 5 5 ___
___ 62 ___
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker device
having a structure for absorbing and attenuating an additional sound generated by a baffle plate
knob of a speaker box. As shown in FIG. 1 and FIG. 2, the conventional speaker device (υ is a
speaker box and (2) is the baffle plate thereof). (3) is a speaker, (4) is Suvy \ whole (υ 正 正 Kabonox decorative frame with a small sound absorbing power, thin net (5) or urethane etc
adhered to the whole surface to make decorative board for speaker box (6) had been constructed.
In such a conventional speaker device, since attenuation of radiation sound from the speaker (3)
by the speaker box decorative plate (6) is made as small as possible, attenuation of radiated
sound from the speaker (3) is kept low However, since the additional sound generated by the
silkworm movement of the baffle plate (2) also passes, there is a drawback that it is impossible to
prevent the distortion of the radiated sound due to this additional sound and deterioration of the
transit characteristics. The present invention has been made in order to solve the abovementioned conventional drawback 'f1: by constructing the speaker box decorative plate (6) with
a sound absorbing material, without directly attenuating direct sound from the speaker (3) So as
to attenuate additional loaves generated by the navel of the buckle plate (2). 3 and 4, (2) (1) is a
speaker box, f21 tli baffle & (31 is a speaker and these are similar to those of the conventional
device . (4) is a decorative plate for a speaker box, (7) is a main point of this invention, it is a
parasitic shape with the baffle plate (2) and conforms to the imaging plate surface of the speaker
(3) A sound absorbing material composed of felt, glass wool, rock wool and acetate cotton etc.
having an opening (8) which makes a partial tone with respect to the partial sound, (5) a net
provided on the front face of this sound absorbing material (7) . These constitute the decorative
plate (6) for the speaker box. In the speaker device thus constituted, the direct radiated sound
from the speaker (3) is emitted without being attenuated to the outside through the opening (8)
of the sound absorbing material (7). The additional sound generated by the movement of the
baffle plate (2) is absorbed by the sound absorbing material (7), attenuated, and radiated. Fig. 5
shows the measured values
of the output sound pressure circumference a characteristic of the
plate gauge recommended according to the present invention and the conventional one. (In the
figure, IJ is the case where there is no sound absorbing material (7), immediately ) Is the sound
pressure radiated by the plate motion of the conventional one and [l] is the radiated sound
pressure when sound absorption processing is performed by felt 0 As can be seen from this
figure, 1 0 dB to 15 dB There is a sound absorption effect of.
Since the net (5) is mainly intended to protect the speaker (3), it can be stretched only to the
opening (8) part of the sucking member (7), and the protection of the duet speaker (3) Is
unnecessary, it is not necessary to perform net processing 'lr 厖 __ 0 As mentioned above, this
invention is the same as the speaker box baffle plate with the decorative board for the speaker
box - the shape of the speaker vibration 4L Since the sound absorbing material has an opening at
the position corresponding to the part, the sound absorbing shrine absorbs the no sound
generated by the vortex motion of the baffle plate of the speaker box. Whether distortion of
radiated sound from the speaker system, degradation of birth characteristics or the like is
prevented and sound quality of direct radiated sound from the speaker is improved or not 04, a
brief explanation of Xtio o Fig. A meal view perspective. FIG. 3 is an exploded perspective view of
a speaker device showing one embodiment of the present invention, and FIG. 4 is a 1: + S chart
FIG. 5 is a characteristic diagram of the loudspeaker's output sound pressure circumference R.
FIG. In the figures, the same reference numerals denote the same parts in the same reed, the
corresponding parts are the speaker, (2) the baffle plate, (3) the speaker, (4) the decorative frame
for the spiker phono box, (5) the net i6) Is a sound absorbing material for the speaker box (=),
sound absorbing material in (r), (8) is an opening, agent (Kaori Kakunosuke) (&) 寥 1 12 12 12
L2 L2 L2 L2 L2 L2 L2 ± ± ± ± ± ± 1 1 1 73 Φ - '727' 5 S2 S 21 · 'ノ "7. ’=2、∼..
/、、−367429・でreal、4″ゞl’jy、s−%! ; ___ ___ 1 ___ ___ 1 ___ ___ 0
___ ___ 0 ___ ___ ___ 0 Representative in Kuzu Te - Q '? ii・−9−;
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description, jps5187429
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