close

Вход

Забыли?

вход по аккаунту

?

JP2001128279

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2001128279
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to any
array type directional speaker device used for consumer and business use.
[0002]
2. Description of the Related Art In recent years, there has been an increasing demand for a
directional controlled speaker device for providing audio information in a specific direction and a
specific area in an information-oriented society.
[0003]
The directivity of the speaker device becomes sharper in the higher frequency range, and the
directivity becomes sharper as the aperture, that is, the area of the diaphragm increases.
Also, it is desirable to use a speaker device that can reproduce the mid-high range with sufficient
sound pressure to clearly hear the sound, but conversely, the sound with the mid-high range fully
reproduced is a disgusting noise for those who do not need to listen It will
[0004]
Narrow directivity can be realized relatively easily by using a large-aperture speaker unit, but this
09-05-2019
1
is unrealistic because of restrictions such as the installation space.
[0005]
In order to realize narrow directivity only in a specific direction in the above situation, an arraytype directional speaker device in which a plurality of speaker units are arranged is effective.
In the array-type directional speaker device, the directivity in the arrangement direction of the
speaker units becomes narrow in acoustic principle. Moreover, the directivity can be narrowed
from the low band side as the length in the arrangement direction, that is, the total length of the
speaker device increases, and the directivity can be controlled to the high band as the interval
between the arranged speaker units is narrow. For example, in the case of a directional speaker
device in which the speaker units are arranged in one row in the horizontal direction, the
directivity in the horizontal direction becomes narrow. On the other hand, since the vertical
direction is only one row in this case, the directivity in the vertical direction is wide because it is
almost equal to that of one speaker unit.
[0006]
Furthermore, in order to narrow the directivity of the array-type directional speaker device, it is
well known that electrical weighting is performed so as to reproduce the reproduced sound
pressure level more at the central speaker unit. However, in order to perform electrical
weighting, a multi-amplifier is used, or an amplifier with a small number of channels, such as a
monaural amplifier, is used via the attenuator. In addition, the load on the central speaker unit
increases with electrical weighting.
[0007]
SUMMARY OF THE INVENTION In the above-described array type directional speaker device,
mechanical thermal load of the speaker unit is likely to be destroyed as much as the central
speaker unit, so it becomes difficult to ensure reliability. In addition to the above, it is expensive
if a multi-amplifier is used for electrical weighting, and it has a problem that power loss due to
the attenuator is increased if a few-channel amplifier is used.
[0008]
09-05-2019
2
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the directional
speaker device according to the present invention comprises a plurality of speaker units
arranged in the horizontal direction, and an aperture of at least one speaker unit arranged at a
central portion. The maximum reproduction sound pressure level of the speaker unit arranged at
the center part is maximized among the plurality of arranged speaker units, and the application
of the large power is performed as the diameter of the speaker unit increases. Not only can
improve the reliability of the central speaker unit against the application of high power, but also
reduces the power supplied to the central speaker unit. Therefore, even when driving with a
monaural amplifier via an attenuator, it is possible to perform electrical weighting with reduced
power loss in the attenuator. It is intended.
[0009]
The invention according to claim 1 of the present invention is characterized in that a plurality of
speaker units are arranged in the horizontal direction, and the aperture of at least one speaker
unit arranged in the center portion is a plurality of speaker units. This is a directional speaker
device which maximizes the sound pressure level of the speaker unit disposed at the center and
maximizes the reproduction sound pressure level of the speaker unit. By using the speaker unit
having a large aperture at the center, not only the input resistance is improved but also monaural
The power consumption can be reduced when the amplifier is driven via the attenuator.
[0010]
According to the second aspect of the present invention, among the plurality of speaker units
arranged in the horizontal direction, the aperture of the speaker unit disposed at each of the left
and right ends is minimized, and the aperture of the speaker unit disposed at the center is
maximized. The aperture of the speaker unit disposed between the speaker unit disposed at both
ends and the speaker unit disposed at the center is as large as the speaker unit disposed near the
speaker unit at the center and the speaker unit disposed at the center With respect to the left and
right, the speaker unit disposed closer to the center increases the reproduced sound pressure
level, and as in the invention of claim 1, not only the improvement of the input resistance but
also the monaural amplifier is driven via the attenuator. Power consumption can be reduced, and
still further, the reproduction sound pressure level of each speaker unit can be reduced. By
adjusting the one in which a monaural amplifier without the attenuator can reduce the power
consumption can be used.
[0011]
The invention according to claim 3 of the present invention arranges a plurality of speaker units
in the horizontal direction and the vertical direction, the speaker units at both left and right ends
minimize the number of the vertical arrangement, and the speaker units in the central portion
09-05-2019
3
vertically The number of vertical arrangement of the speaker units disposed between the left and
right speaker units and the central speaker unit is larger at the central unit and closer to the
central speaker unit. The synthetic sound pressure level of the speaker units arranged in the
vertical direction is symmetrical to the left and right speaker units, and the synthetic sound
pressure level of the speaker units is increased toward the central portion as viewed from the
horizontal direction. If you adjust the playback sound pressure level of each speaker unit, you
can use the monaural amplifier without the attenuator and reduce the power consumption. Than
is.
[0012]
The invention according to claim 4 of the present invention arranges a plurality of speaker units
in the horizontal direction, and staggers in at least two stages in the vertical direction, and the
reproduction sound pressure of the speaker unit in the central portion as viewed from the
horizontal direction. The level is increased, and by arranging in a staggered configuration, the
speaker device can be configured to be thin in the vertical direction while increasing the number
of speaker units, and it is possible to distribute the load by using a large number of speaker units
in the central portion. Since the horizontal interval of the speaker units becomes substantially
narrow due to the staggered arrangement, the directivity control limit frequency on the high
frequency side can also be improved.
[0013]
The invention according to claim 5 of the present invention is the one in which the difference in
the number of the horizontal arrangement of the speaker units in the adjacent stages is one, and
in the same manner as in claim 4, thin in the vertical direction The speaker device is configured,
and the load is dispersed by using a large number of speaker units in the central portion, and
there is an advantage that the directivity control limit frequency on the high band side can be
improved. Thus, when driving with an amplifier with a small number of channels, such as a
monaural amplifier, setting with reduced power loss of the attenuator becomes possible.
[0014]
An embodiment of the present invention will be described below with reference to FIGS.
[0015]
(First Embodiment) FIG. 1 is an external perspective view of a directional speaker device
according to a first embodiment of the present invention, and FIG. 2 is a block diagram of the
09-05-2019
4
circuit.
According to the figure, 1a to 1g are speaker units arranged in the horizontal direction, 2b to 2g
are attenuators, 3 is an amplifier, and 4 is an input means for an audio signal.
[0016]
Next, the detailed configuration of the above-described embodiment will be described along with
the operation.
[0017]
First, an audio signal is input from the input means 4 and amplified to a desired size by the
amplifier 3 to drive the speaker units 1a to 1g.
Here, for the speaker units 1b to 1g, attenuators 2b to 2g are respectively inserted at the front
stages of these, and the reproduction sound pressure is set to be as large as the speaker units 1b
and 1c arranged on the 1a side.
Further, by setting the reproduction sound of the speaker unit 1a to be larger than the respective
adjacent speaker units 1b and 1c on the left and right, the reproduction sound of the speaker
unit 1a at the central portion is maximized, and the speaker units 1f and 1g at the left and right
ends are provided. The reproduction sound pressure becomes smaller as it gets closer.
Therefore, the directivity in the horizontal direction can be narrowly controlled.
[0018]
Here, the larger the diameter of the speaker unit, that is, the larger the diaphragm area, the more
generally there is an input resistance in terms of electric power, and furthermore, the efficiency
is good, and a large sound is produced with a small electric power.
09-05-2019
5
Therefore, by adopting such a directional speaker device, the load on the speaker unit 1a
disposed in the center becomes small, and the power consumption can be reduced.
The attenuators 2b and 2c can be omitted by adjusting the volumes of the speaker units 1a and
1b and 1c, and the power consumed by the attenuators 2b and 2c can also be saved.
[0019]
(Embodiment 2) FIG. 3 is an external perspective view of Embodiment 2 of the directional
loudspeaker device of the present invention, and FIG. 4 is a block diagram of the circuit.
The same reference numerals as in the first embodiment denote the same reference numerals as
in the first embodiment.
[0020]
Next, the detailed configuration of the second embodiment will be described along with the
operation.
The operation is the same as that of the first embodiment, and the reproduction sound is made
larger at the center speaker unit 1a to control the directivity in the horizontal direction narrower.
However, the main difference from the first embodiment is the speaker unit 1b to The caliber of
1e has changed.
That is, the aperture of the central speaker unit 1a is at the maximum, that of the left and right
speaker units 1f and 1g is minimized, and the apertures of the speaker units 1b to 1e are
arranged on the speaker unit 1a side as shown in FIG. By setting the size to a large size
sequentially, narrow directivity is realized, and since the aperture is as large as a speaker unit
that sets a large volume, the load on the speaker units 1a to 1g can be balanced. And reliability
against destruction and the like. Furthermore, depending on the setting of the reproduction
sound size of the speaker units 1a to 1g, all of the attenuators 2b to 2g can be omitted, which can
also save power consumed by the attenuators 2b to 2g. It is possible to reduce.
09-05-2019
6
[0021]
Although the number of speaker units is seven in the first and second embodiments, the present
invention is not limited to this, and a speaker unit having the largest aperture in the central
portion when an even number of speaker units are arranged. It is needless to say that there may
be two, for example.
[0022]
Further, although the drive of the speaker units 1a to 1g has been described as a monaural
amplifier, it may be a general two-channel amplifier or a multi-amplifier more than that.
[0023]
(Third Embodiment) FIG. 5 is an external perspective view of a directional speaker device
according to a third embodiment of the present invention, and FIG. 6 is a block diagram of the
circuit.
1a1 to 1a4, 1b1 to 1b3, 1c1 to 1c3, 1d1, 1d2, 1e1, 1e2, 1f1 and 1g1 in the figure are speaker
units.
In the following, the same parts as in Embodiments 1 and 2 will be assigned the same reference
numerals and explanations thereof will be omitted. The main differences from the previous
embodiments are that four speaker units 1a1 to 1a4 are disposed vertically in the central
portion, and one speaker unit 1f1 and one g1 are disposed on each of the left and right ends. A
large number of speaker units 1b1 to 1b3, 1c1 to 1c3 and 1d1, 1d2, 1e1 and 1e2 are arranged
in the vertical direction as much as the central speaker units 1a1 to 1a4.
[0024]
Similarly to the second embodiment, since the directivity in the horizontal direction is controlled
to be narrow similarly and many loudspeaker units 1a1 to 1g1 are disposed in the vertical
direction toward the central portion requiring a large reproduced sound as viewed from the
horizontal direction, The balance of the load of the speaker units 1a1 to 1g1 is ensured. In
addition, since the attenuators 2b to 2g can be omitted by the arrangement of the speaker units
09-05-2019
7
as in the second embodiment, the power consumption can be further reduced.
[0025]
Although eight speaker units 1a1 to 1g1 are disposed in the horizontal direction and at the
maximum in the vertical direction in the drawing, the present invention is not limited to this. In
addition, although electrical weighting in the vertical direction of the speaker units arranged in
the vertical direction is not performed, it is needless to say that the directivity in the vertical
direction can be narrowly controlled by this.
[0026]
Furthermore, although the drive of the speaker units 1a1 to 1a4, 1b1 to 1b3, 1c1 to 1c3, 1d1,
1d2, 1e1, 1e2, 1f1 and 1g1 has been described as monaural amplifiers, even general two-channel
amplifiers and more multi-amplifiers But it is good.
[0027]
(Fourth Embodiment) FIG. 7 is an external perspective view of a directional speaker device
according to a fourth embodiment of the present invention, and FIG. 8 is a circuit block diagram
thereof.
In the figure, 1a1, 1a2, 1b1, 1b2, 1c1, 1c2, 1d1, 1d2, 1e1, 1e2, 1f1, 1f2, 1g1, 1g2 are speaker
units and 1b-2g are attenuators. The major differences between the embodiments described
above and the present embodiment are the seven loudspeaker units 1a1, 1b1, 1c1, 1d1, 1e1, 1f1,
1g1 and 1a2, 1b2, 1c2, arranged in the horizontal direction. That is, 1d2, 1e2, 1f2 and 1g2 are
arranged in two stages in the vertical direction and in a staggered arrangement.
[0028]
The operation is the same as in the previous embodiments, and the directivity in the horizontal
direction is controlled to be narrower by setting the reproduction sound pressure larger as the
speaker unit is disposed at the center, and further, two stages are stacked in the vertical
direction. By arranging the load, the load on the speaker units 1a1 to 1g2 which requires a
particularly large sound pressure can be reduced.
09-05-2019
8
[0029]
Incidentally, although the speaker units 1a1 to 1g2 are provided in two stages in the vertical
direction, the vertical arrangement of the speaker devices can be made smaller by miniaturizing
the speaker units, and the size can be reduced.
In addition, since the arrangement interval of the speaker units in the horizontal direction is
substantially halved as compared with the one-stage arrangement, the frequency capable of
narrowly controlling the directivity on the high frequency side is doubled.
[0030]
In the figure, although seven columns are arranged in the horizontal direction and arranged in
two stages, the present invention is not limited thereto. The speaker units 1a1, 1a2, 1b1, 1b2,
1c1, 1c2, 1d1, 1d2, 1e1, 1e2, 1f1, 1f2, The driving of 1g1 and 1g2 is not limited to a monaural
amplifier, but may be a general 2-channel amplifier or a multi-amplifier more than that.
[0031]
(Fifth Embodiment) FIG. 9 is an external perspective view of a directional speaker device
according to a fifth embodiment of the present invention, and FIG. 10 is a circuit block diagram
thereof.
1a1 to 1a3, 1b1, 1b2, 1c1, 1c2, 1d1, 1d2, 1e1, 1e2, 1f1, 1g1 in the figure are speaker units.
Only differences from the fourth embodiment will be described. Seven speaker units 1a1, 1b1,
1c1, 1d1, 1e1, 1f1, 1g1 are arranged on the lower side in the horizontal direction, and 1 from the
lower side on the upper side in the horizontal direction. The small number of six speaker units 1
a 2, 1 a 3, 1 b 2, 1 c 2, 1 d 2 and 1 e 2 are arranged in a staggered manner in two stages in the
vertical direction.
[0032]
The operation is the same as that of the previous embodiments, and three speaker units 1a1 to
1a3 are disposed at the central portion requiring the largest reproduction sound pressure, and
two speaker units may be provided at both ends with the smallest sound pressure. Placing 1f1
09-05-2019
9
and 1g1 balances the load on the entire speaker unit.
[0033]
As in the fourth embodiment, the staggering enables the height of the speaker device to be
reduced while being arranged in two stages, and the substantial arrangement interval of the
speaker units in the horizontal direction can be set narrower, so the directivity is controlled to a
high frequency. It has the advantages that it can do.
[0034]
Although FIG. 9 shows the arrangement of seven and six in the horizontal direction in two stages,
the present invention is not limited to this. The speaker units 1a1 to 1a3, 1b1, 1b2, 1c1, 1c2,
1d1, 1d2, 1e1 and 2e2 are not limited thereto. , 1 f 1 and 1 g 1 may be either a monophonic
amplifier or a general two-channel amplifier or a multi-amplifier of more than that.
[0035]
In the embodiments described so far, the directivity in the horizontal direction is controlled to be
narrow, but it is needless to say that the directivity may be controlled to be narrow in the vertical
direction by making it vertical. It is.
[0036]
As described above, according to the present invention, a speaker unit disposed in the center of
an array-type speaker device in which the directivity in the horizontal direction is controlled to
be narrow increases the sound pressure level to make the directivity more narrow. When this is
realized, not only the reliability of the speaker device is improved because the load of the speaker
unit can be balanced, but also the attenuator in the case of driving with a small channel amplifier
such as a monaural amplifier can be reduced, and the power consumed by the attenuator It is
possible to provide an excellent directional speaker device capable of reducing the
09-05-2019
10
Документ
Категория
Без категории
Просмотров
0
Размер файла
20 Кб
Теги
jp2001128279
1/--страниц
Пожаловаться на содержимое документа