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Description 1, title of the invention
Speaker device
8. Detailed Description of the Invention The present invention is a stereo reproduction of wideband and flat sound pressure characteristics in a speaker box of small volume where the size of
the speaker box is limited, such as an audio device for a television receiver. The present invention
relates to a speaker device that Conventionally, in a speaker box such as a television, as shown in
FIG. 1 (this, there have been those in which left and right speakers for reproducing left and right
two-channel signals are attached to one speaker box. In the figure, (la) and (1b3 are speakers for
reproducing n left and right channel signals, (2) is a speaker box for housing the speakers, and
(3) is crosstalk due to the sound from the back of the diaphragm of the left and right speakers. It
is a partition plate for preventing. Next, the operation will be described. Speakers (1a) and (1b)
that reproduce the left and right channel signals, for example, when one stereo signal is input to
each speaker, the speaker (1a). The sound emitted by (1b) causes the listener to feel a sound
image (sound stage) between the left and right speakers. In addition, sound is emitted from the
back of the diaphragm of these speakers (la) and (lb) into the sleeper pock (2), but at this time,
crosstalk between the sounds radiated into the inside of the speakers is prevented. In order to
improve sound separation, a partition plate (3) is provided. Since the conventional speaker device
is configured as described above, when there is a restriction in the size of the baffle plate for
attaching the left and right speakers (1a) and (1b), a large diameter speaker can not be used. Not
only is it difficult to play EndPage: 1 in the low-pitched range, but when trying to play the lowpitched range using the speaker with the largest aperture, the speaker installation is not enough
to obtain sufficient speaker spacing. I can not get a good stereo effect. Further, in the case of a
large-aperture speaker, since the divided vibration of the diaphragm is generated from a low
frequency, a large peak is generated on the sound pressure characteristic, and the sound quality
is degraded. The present invention has been made to eliminate the above-mentioned drawbacks
of the prior art, and uses a small-aperture speaker as a speaker for regenerating left and right
channel signals, and uses sound radiators for reproducing a whistling area for left and right. In
the so-called eight-dimensional reproduction system, which is disposed between two or more
forces, the room for storing the spin forces is divided into a plurality of parts by a partition plate,
and a low volume speaker box is supported by a small volume speaker box. An object of the
present invention is to provide a speaker device that obtains sound pressure characteristics.
Hereinafter, an embodiment of the present invention will be described based on the drawings.
In FIG. 2, (la) and (1b3 are .tau.-cubive speakers for reproducing n left and right channel signals
respectively, (2) a speaker box, and (4a) and (4b) l divided by the left and right side plates; (6) is
a sound radiator without a magnetic circuit, (7) is a speaker for driving the sound radiator (6), a
speaker for reproducing left and right channel signals. (Ta) t (lb) can be easily configured with a
small diameter and a small volume, since the low range is reproduced by the sound radiator (6).
In addition, since the diameter of the speaker is small, the division of the diaphragm occurs at a
high frequency, so that a more blackish sound pressure characteristic can be easily obtained. In
addition, the sound radiator (6) for reproducing the low praise area is in the form of being driven
by the driving speaker (7), and a room surrounded by the driving speaker (7) and the sound
radiator (6) Since the speaker acts as an acoustic transformer, a speaker for driving (7) is added
to the equivalent mass of the speaker for driving in which a part of the equivalent mass of the
sound radiator (6) The purchase price mass increases, and even if the drive speaker (7) is housed
in a small volume room, reproduction up to the low tone range becomes possible. Also, the sound
radiator (6) can be easily driven by the driving speaker (7), and the piston movement can be used
completely within the band and from the sound radiator (6) causing deterioration of the sound
quality High frequency components can be completely cut off. 8 shows the sound pressure
characteristics (dotted line) when using the speaker with the same volume and using the speaker
with the aperture of 16t1M in the conventional structure shown in FIG. 1 and the structure of the
present invention shown in FIG. Speaker with 10c11 aperture as left and right speakers (1a) e
(1b), sound radiator (6) with 2 GcII equivalent aperture, 12 speaker with 12 cIl aperture for
driving speaker force (7) The comparison with a sound pressure characteristic (solid line) is
shown. In the speaker device of the present invention, the bass range is greatly expanded, and
flat characteristics up to the treble range are obtained. In the above embodiment, the
compartments for storing the speakers (la) and (lb) for reproducing the left and right channels by
using the partition plates (4a) and (4b) have a sealed structure, as shown in FIG. The partition
plates (4a) and (4b) are not sealed, but driven! ll! The same effect can be obtained even if the
diaphragm rear face opening type of I speaker (7) is used. In addition, the left and right speakers
(1, a). In order to prevent the gross talk of (1b), as shown in FIG. 5, the length of the partition
plates (4a) and (4b) is changed, and further, a cut plate and baffles of (4a) and (4b) Attachment to
the plate may be made at any angle as shown in FIG.
As described above, according to the structure of the present invention, it is possible to
reproduce low tones with a small volume speaker box and to obtain flat sound pressure
4. Brief description of the drawings-Fig. 1 is a sectional view showing a conventional speaker
device, Fig. 2 is a sectional view of a speaker device according to one embodiment of the present
invention, and Fig. 8 is a sectional view according to the present invention It is a figure which
shows the comparison of the sound pressure characteristic with things. 4 to 6 are cross sectional
views showing another embodiment of the present invention. -Code (la), (lb) ... Speaker, (2) Five
speaker box, 13) ... Partition plate, (4a), (4b), (5)-Partition plate, '(6) · · ·・ Sound radiator, (7) ...
Speaker for driving. In the figures, the same reference numerals indicate the same or boxed parts.
Agent Shino Shin-EndPage: 2 Figure 4 ° Figure 5 Figure 6 · Showa Bq, June 23 name of the
invention name of the invention speaker device correction EndPage: 35, the object of correction
Speaker device
The column of the detailed description of the invention of the specification. 6. Contents of
correction (1) In the specification, on the 4th line, 7th column of the specification, "A small
volume of the product is sufficient" is corrected as "a small volume of a chamber is required". (2)
On page 4 line 118, the phrase "because the aperture of the speaker is small" is corrected as
"because the aperture of the speaker is small". EndPage or more: 4
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description, jps57119591
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