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JP2006042186

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DESCRIPTION JP2006042186
PROBLEM TO BE SOLVED: To obtain a wide sound field, two speakers are arranged at an angle of
180 degrees, but the sound pressure in the high region is lowered, and the high region must be
boosted by a circuit to compensate for this. SOLUTION: The vibration axes are arranged at an
angle of about 180 degrees with each other, and a speaker unit for L channel and R channel
having a high reproduction sound pressure higher than that of a middle to low band, a speaker
for L channel and R channel It consists of an enclosure that houses the unit. [Selected figure]
Figure 1
スピーカー
[0001]
The present invention relates to a speaker.
[0002]
The applicant has so far researched how the sound emitted from the speaker propagates in space
and reaches the listener's ear.
In Japanese Patent Application No. 2002-375615, the applicant has proposed a speaker in which
L and R channel speaker units are arranged with an angle of 180 degrees. According to this
speaker, it is possible to obtain a wide sound field without increasing the spacing between the
speaker units.
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[0003]
However, since the speaker unit is disposed at an angle of 180 degrees with respect to the
listener, generally the frequency characteristic of the high region is lowered. In order to
compensate for this, the high frequency was boosted and reproduced on the circuit. However, the
high-pass boost on the circuit has a disadvantage that the S / N ratio is degraded because the
high-pass noise is also boosted together.
[0004]
The vibration axes are arranged at an angle of about 180 degrees to each other, and the highrange reproduced sound pressure is composed of L-channel and R-channel speaker units, which
are higher than the middle-low range.
[0005]
According to the present invention, it is possible to obtain a wide sound field even though the
spacing between the speaker units is narrow, and there is no need to boost high frequencies in
the circuit.
[0006]
Hereinafter, the best embodiment according to the present invention will be described with
reference to the attached drawings.
[0007]
Hereinafter, examples of the present invention will be described.
FIG. 1 is a front view of the speaker 1.
The L-channel speaker unit 4 and the R-channel speaker unit 5 are provided back-to-back in the
closed type independent enclosures 2 and 3 respectively, and the vibration of the L-channel
speaker unit 4 and the R-channel speaker unit 5 The axes are at an angle of 180 degrees to one
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another.
Therefore, the reproduced sound from each of the speaker units 4 and 5 is radiated to the space
in the opposite direction to each other. Reference numeral 6 denotes a partition for separating
the enclosures 2 and 3 and prevents mutual interference due to reproduced sound from the
speaker units 4 and 5.
[0008]
FIGS. 2 and 3 are a front view and a right side view showing a state in which the speaker 1 is
installed on the top of the plasma display 10. The reproduced sound from the speaker 1 is
emitted to the space at an angle of 180 degrees to each other, so that the sound image spreads in
the left and right direction, and the same sound field space as the speaker units 4 and 5 are
installed apart from the actual distance. You can get
[0009]
FIG. 4 shows frequency characteristics of the speaker units 4 and 5. As shown by the line A in
FIG. 4, the frequency characteristics on the vibration axis of the speaker units 4 and 5 are such
that the sound pressure rises from around 1 kHz, and the sound pressure increases by
approximately 5 dB at around 5 kHz and approximately 10 dB at around 15 kHz. There is. On the
other hand, line B in FIG. 4 indicates the frequency characteristic at a position of 90 degrees from
the vibration axis of the speaker units 4 and 5. As shown by line A in FIG. 4, since the high
frequency band originally has a tendency to slightly increase, generally, even at a position where
the sound pressure in the high range decreases, as shown by line B, it is almost flat in all
frequency bands. Characteristics can be obtained. Therefore, it is possible to propagate the
unattenuated reproduced sound to the listener located at an angle of 90 degrees with the
vibration axes of the speaker units 4 and 5 without boosting the high frequency by the electric
circuit.
[0010]
In the above embodiment, although the embodiment has been described with two stereo
channels, this speaker may be used as a front channel speaker for 5.1 channel surround signal. In
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this case, it is desirable to add a center speaker and to direct its vibration axis toward the listener.
[0011]
In addition, the present invention is not limited to the above-described embodiment, and it goes
without saying that various aspects can be taken without departing from the spirit of the present
invention.
[0012]
The front view of the speaker 1.
The front view which shows the state which installed the speaker 1 in the upper part of the
plasma display 10. FIG. The right view which shows the state which installed the speaker 1 in the
upper part of the plasma display 10. FIG. The figure which shows the frequency characteristic of
the speaker units 4 and 5. FIG.
Explanation of sign
[0013]
1 Speaker 2, 3 Enclosure 4, 5 Speaker Unit 6 Bulkhead
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