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JPS6141299

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DESCRIPTION JPS6141299
[0001]
FIELD OF THE INVENTION The present invention relates primarily to small to ultra-small speaker
systems. 2. Description of the Related Art In recent years, the demand for opening a stereo on a
desk or outdoors has come to be widely used in many cases. The following describes a
conventional speaker system. FIG. 1 is an external view of a conventional speaker system, in
which 1 is a 57 m aperture speaker and 2 is a 68 N × 68 in × 88 mm rectangular
parallelepiped cabinet. FIG. 2 is a frequency sound pressure characteristic diagram of this
speaker system. However, in the above-described conventional configuration, as shown in FIG. 2,
the sound pressure in the low band is lower by about e dB than the sound pressure in the middle
and high bands bordering on the two bends due to the diffraction effect of the cabinet . When the
speaker system is used by placing it on the desk J-or the like, the speaker system is isolated and
there is no baffle effect around the speaker system, resulting in characteristics as shown in FIG.
In the lack of sound range, it has the problem that it becomes an unnatural sound quality that
only highs are emphasized. SUMMARY OF THE INVENTION The present invention solves the
conventional problems of Toki, eliminates the step between the low frequency range and the
middle and high frequency range of the frequency sound pressure characteristic by the
diffraction effect of the cabinet, flattens it, and places it on a desk Thus, the present invention
provides a speaker system capable of obtaining natural sound quality even when the speaker
system is used in an isolated state. Configuration of the Invention The present invention is a
speaker system comprising a speaker, a cabinet for housing the same, and means for correcting
the step between the low range and the middle and high range of the frequency sound pressure
characteristic by the diffraction effect of the cabinet. Even when the speaker system is used in an
isolated state by placing it on a desk or the like, a flat frequency sound pressure characteristic
can be obtained, so that natural sound quality can be obtained. Description of the Embodiment
FIG. 3 is an external view of a speaker system according to an embodiment of the present
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invention. In FIG. 3, 3 is a full range speaker with an aperture of 8 crn, and 4 is a spherical
cabinet with a diameter of 200 wn. FIG. 4 is a circuit diagram showing a correction circuit as an
example of means for correcting the difference in level between the low range and the middle
and high range of the frequency sound pressure characteristic by the diffraction effect of the
cabinet 4 and FIG. In FIG. 4, 6 is a coil, 6 is a capacitor, 7.8 is a resistor, and 3 is a speaker. The
speaker system of the present embodiment configured as described above will be described
below.
FIG. 5 is a frequency sound pressure characteristic diagram of the speaker system of the present
embodiment. FIG. 6 is a frequency sound pressure characteristic diagram when there is no
correction circuit. When the correction circuit of FIG. 4 is used as shown in FIG. It can be seen
that it has a balanced and flat characteristic of the high range. Conversely, when there is no
correction circuit, it can be seen that the sound pressure in the middle and high range becomes
about s dB higher than the sound pressure in the low range after the I kllz position. As described
above, according to the present embodiment, the speaker system can be placed on a desk by
correcting the level difference between the low range, the middle range, and the high range of
the frequency sound pressure characteristic due to the diffraction effect of the cabinet. Flat
frequency sound pressure characteristics can be obtained even when used in an isolated state,
and extremely natural sound quality can be obtained with well-balanced low, middle and high
tones. In the present embodiment, the resistor 7 of the correction circuit is a constant resistance,
but this may be a volume. In this case, the amount of correction can be varied, and it goes
without saying that when used in an isolated state, the amount of correction may be reduced if
there is a valve effect to some extent in a bookshelf. It is possible to obtain flat frequency sound
pressure characteristics regardless of any arrangement of the speaker system, and to obtain
extremely natural sound quality. In the embodiment of FIG. 3, the cabinet has a spherical shape,
but the cabinet may have a rectangular parallelepiped shape as in the prior art. In the
embodiments, specific numerical values are illustrated as the dimensions of the cabinet and the
values of the electronic parts, but the present invention is not limited to these numerical values.
Effect of the Invention The present invention is used in an isolated state as the speaker system
should not be placed on a desk by providing a means for correcting the step between the low
range, middle and high range of the frequency sound pressure characteristics by the diffraction
effect of the cabinet. However, the frequency sound pressure characteristics can be made flat
with a balance between the low range, the middle range, and the high range, and an extremely
natural sound quality can be obtained. Further, by making the correction amount variable, it is
possible to obtain flat frequency sound pressure characteristics regardless of how the speaker
system is placed, and it is possible to obtain extremely natural sound quality regardless of any
placement. Can realize an excellent speaker system.
[0002]
07-05-2019
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Brief description of the drawings
[0003]
1 is a perspective view of a conventional speaker system, FIG. 2 is its frequency sound pressure
characteristic diagram, FIG. 3 is a perspective view of a speaker system in one embodiment of the
present invention, and FIG. 4 is a cabinet in the same embodiment. 5 is a circuit diagram showing
a correction circuit as an example of means for compensating for the step between the low tone
range and the high tone range of the frequency sound pressure characteristic by the diffraction
effect of FIG. 5 is a frequency sound pressure characteristic of the speaker system in the above
embodiment. FIG. 6 and FIG. 6 are frequency sound pressure characteristics when the correction
circuit is not provided in the above embodiment.
3... Speaker 4. Name of Agent Attorney Nakao Toshio Other 1 person Figure 1 Figure 2 Figure 3
Figure 4
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