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JP2016105564

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DESCRIPTION JP2016105564
Abstract: In a speaker device provided with speaker units having different diameters and sound
emission directions, it is possible to provide a speaker device capable of suppressing a change in
sound quality at a listening position caused by changing the direction of installation of the
speaker device. about. A speaker device (10) is provided with first and second speaker units (23L,
23R, 24L, 24R) having different apertures and sound emission directions. The speaker device 10
can be installed with the first speaker unit 23L, 23R directed to the listening position and placed
on the rack, and the second speaker unit 24L, 24R directed to the listening position hung on the
wall It has become. The controller 41 controls the equalizer correction unit 47 according to the
installation direction of the device, and the frequency characteristic of the acoustic signal input
to the first and second speaker units 23L, 23R, 24L, 24R is the difference between the aperture
and the sound emission direction Correction so that the sound quality does not change at the
listening position. [Selected figure] Figure 3
Speaker device
[0001]
The technology disclosed in the present application relates to a technology for correcting a
change in sound quality according to a change in the posture of the speaker device in a speaker
device provided with speaker units facing in different directions.
[0002]
Heretofore, a speaker system has come into widespread use that uses a plurality of speakers (for
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example, a woofer, a tweeter, etc.) disposed indoors to provide a comfortable surround effect.
On the other hand, in the speaker system, it is necessary to arrange the speakers around the
room so as to surround the listener and connect the speakers with an acoustic cable. On the
other hand, there are so-called "sound bars" and "all-in-one" speaker devices in which a plurality
of types of speaker units are incorporated into one device (for example, Patent Document 1 etc.).
[0003]
A speaker device such as a sound bar is used, for example, to connect to a television and enjoy
high-quality sound as well as video. In this type of speaker device, in order to cope with the
recent trend toward thinner and larger TVs, the speaker device is also required to be thinner for
design reasons and restrictions on installation space. As a result, in the speaker device, it is
difficult to arrange the multi-way speaker units on the same plane due to thinning.
[0004]
The speaker device disclosed in Patent Document 1 has a rectangular parallelepiped-shaped
casing that is long in one direction, and among a plurality of surfaces provided in the casing, two
adjacent surfaces (in the document, surfaces 111 and 111) A speaker unit is provided at 112). A
speaker unit (in the literature, the acoustic driver 191), which is optimized to output an acoustic
signal in a high frequency band, is attached to one of the two faces, and the other face is
provided with an intermediate frequency A speaker unit (in the literature, acoustic drivers 192a192b) optimized for outputting a band of acoustic signals is attached. In the speaker device, filter
circuits having different passing bands are provided for each speaker unit. For example, the input
5.1ch acoustic signal is subjected to filtering and separated into optimal frequency bands. Is
input to each speaker unit.
[0005]
Patent No. 5552668 gazette
[0006]
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2
By the way, the above-mentioned speaker device is rotated by 90 degrees with the longitudinal
direction of the casing as the axial direction, and is used by being placed vertically or
horizontally.
In the speaker device, when the installation direction of the device is changed, the type of the
speaker unit facing the listener is changed. For this reason, by changing the installation direction
of the device, the dominant speaker unit that forms the sound field at the listening position is
changed. As a result, there is a problem that the sound quality at the listening position changes
depending on the direction of installation of the speaker device.
[0007]
The technology disclosed in the present application has been proposed in view of the above
problems. A speaker device including a speaker unit having different diameters and sound
emission directions, and providing a speaker device capable of suppressing a change in sound
quality at a listening position caused by changing the installation direction of the speaker device.
Do.
[0008]
In the speaker device according to the technology disclosed in the present application, a first
speaker unit that emits a sound according to an input acoustic signal and a sound emission
direction different from the first speaker unit are set, and the first speaker unit is used. A second
speaker unit having a larger aperture and receiving an acoustic signal including a frequency
band of an acoustic signal input to the first speaker unit, and first and second speaker units are
provided. The housing can be installed in two states: the first state with the sound direction
directed to the listening position and the second state with the sound emitting direction of the
second speaker unit directed to the listening position; A detection means for detecting which one
of the two states is, and an equalizer correction for correcting the frequency characteristic of an
acoustic signal input to the first and second speaker units according to the detection result of the
detection means Characterized in that it comprises a stage, a.
[0009]
The said speaker apparatus is provided with the 1st and 2nd speaker unit from which an
aperture and sound emission direction differ.
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The speaker device can turn the sound emission direction of any of the first and second speaker
units to the listening position by changing the direction of the housing. The equalizer correction
means corrects the frequency characteristics of the acoustic signal input to the first and second
speaker units in accordance with the detection result of the detection means for detecting the
orientation (first and second states) of the housing. The equalizer correction means changes the
frequency characteristic so as to correct, for example, the change in sound quality at the listening
position caused by the difference in aperture diameter of the first and second speaker units and
the difference in sound emission direction. More specifically, since the first and second speaker
units have different diameters, the reproduction band to be used is different. In general, the first
speaker unit with a smaller aperture is better at high frequency reproduction than the second
speaker unit with a larger aperture. For this reason, in the first state in which the sound emission
direction of the first speaker unit is directed to the listening position, the influence of the high
frequency sound by the first speaker unit becomes greater for the listener. In the speaker device,
an acoustic signal having overlapping frequency bands is input to the first and second speaker
units. Therefore, the equalizer correction means is, for example, in the first state that the first
speaker unit is good at the frequency band of the sound reproduced from the second speaker
unit whose sound emission direction is set in a direction different from the listening position. The
frequency characteristic is changed so that speech in the middle frequency band is emphasized.
As a result, it is possible to suppress the change in sound quality at the listening position caused
by changing the direction of installation of the speaker device.
[0010]
Further, in the speaker device according to the technology disclosed in the present application, a
delay caused by a difference in distance for transmitting a space until the sound emitted from
each of the first and second speaker units reaches the listening position is It is good also as
composition provided with a delay amendment means to correct according to a detection result
of a detection means.
[0011]
Here, the distance for transmitting space means, for example, the distance for transmitting the
space until the sound wave emitted from the speaker unit reaches the listening position directly
or indirectly by reflection or the like. .
For example, in the first state, the second speaker unit has the sound emission direction set in a
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direction different from the listening position, and the emitted sound is reflected by a wall or a
ceiling before reaching the listening position. The distance to be transmitted is longer than that
of the first speaker unit. The sound emitted from the second speaker unit is delayed in time to
reach the listening position as compared to the sound emitted from the first speaker unit. As a
result, there is a possibility that the listener may feel discomfort because the sound of the second
speaker unit is delayed and heard. On the other hand, in the speaker device, the delay correction
means corrects the delay of the sound emitted from each of the first and second speaker units,
and the sound wave phase at the listening position is aligned with the listener. It makes it
possible to hear a pleasant sound without discomfort.
[0012]
Further, in the speaker device according to the technology disclosed in the present application, a
level correction unit that changes the signal level of the acoustic signal input to at least one of
the first and second speaker units according to the detection result of the detection unit It is
good also as composition provided.
[0013]
The first and second speaker units have different aperture sizes, so that the sound pressure of
the reproduced sound is different.
For this reason, in the first and second states, the sound pressure level of the sound entering the
listener's ear also fluctuates by changing the speaker unit facing the listening position. The level
correction means performs, for example, processing to lower the level of the audio signal input to
the first speaker unit facing the listening position in the first state, and the audio signal input to
the second speaker unit facing the direction different from the listening position. Perform
processing to raise the level. This makes it possible to suppress the change in sound pressure at
the listening position when the direction of installation of the speaker device is changed.
[0014]
In addition, the speaker device according to the technology disclosed in the present application
may be configured to include a third speaker unit having a larger aperture than the first and
second speaker units and emitting a lower frequency sound.
[0015]
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In the speaker apparatus, for example, when an audio signal of 2.1 channels having a low
frequency range (LFE) channel including many low frequency band components in addition to 2
channels of stereo (L, R) is input, By utilizing the speaker unit to reproduce the sound of the bass
channel, it is possible to reproduce powerful bass and heavy bass which are difficult only with
the first and second speaker units.
[0016]
Further, in the speaker device according to the technology disclosed in the present application,
the housing has a shape extending long in one direction, has a first surface and a second surface
orthogonal to each other, and the first speaker unit And a pair of speaker units provided on each
of both side portions in the extending direction of the housing on the first surface, and a second
speaker unit is provided on each of the both side portions in the extending direction on the
second surface It is good also as composition which has a pair of speaker units.
[0017]
In the speaker apparatus, reproduction is performed in a state where the speaker units disposed
on both sides in the extension direction, which are included in each of the first and second
speaker units, are arranged on both sides in the left and right direction (horizontal direction) of
the listener, for example. By doing this, it is possible to make the listener hear a sound with a
sense of spread.
Moreover, in the said speaker apparatus, the 1st speaker unit with a small aperture is provided in
the 1st surface.
For this reason, it becomes possible to reduce the length of the first surface in the direction
orthogonal to the extending direction in accordance with the aperture of the first speaker unit.
That is, it is possible to make the speaker device thinner and smaller. Therefore, it is effective to
apply the speaker device to a so-called sound bar or the like, which has recently been required to
be thinned.
[0018]
According to the technology disclosed in the present application, it is possible to suppress the
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change in sound quality at the listening position caused by changing the direction of installation
of the speaker device in a speaker device provided with speaker units having different diameters
and sound emission directions. Speaker device can be provided.
[0019]
It is a perspective view which shows the state which arrange | positioned the speaker apparatus
of embodiment on the rack inside a room.
It is a perspective view which shows the state which hung the speaker apparatus of embodiment
on the wall in the room. It is a block diagram which shows the structure of a speaker apparatus.
[0020]
Hereinafter, an embodiment of the present invention will be described with reference to the
attached drawings. FIG. 1 is a perspective view of a room 200 in which a speaker device 10
according to an embodiment of the present invention, a television 13 connected to the speaker
device 10, and a rack 15 on which the speaker device 10 is mounted are installed. Is shown. In
the following description, as shown in FIG. 1, the direction perpendicular to the floor 201 of the
room 200 is the vertical direction, the direction from the speaker device 10 to the listening
position 210 is the front, and the direction from the listening position 210 is The direction going
to the left and right will be described as the left and right direction.
[0021]
As shown in FIG. 1, the television 13 is mounted along the wall 203. The rack 15 is disposed on
the floor 201 with the back surface along the wall 203 below the television 13. The speaker
device 10 is placed on the rack 15 and located below the television 13. The speaker device 10
and the television 13 are connected to each other via, for example, a cable connected to an HDMI
(registered trademark) (High Definition Multimedia Interface) terminal (see FIG. 3), and
interlocking audio and video is performed. It is possible to play.
[0022]
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The speaker device 10 has a rectangular parallelepiped case 21 which is long in one direction
(right and left direction in the drawing) and has a long width in the front and rear direction as
compared with the width in the vertical direction. The case 21 has two first speaker units 23 on
the surface 21A, two second speaker units 24 on the surface 21B, and two of the adjacent
surfaces 21A and 21B (front and upper surfaces in the figure). Three speaker units 25 are
attached, and a total of six speaker units are attached. In addition to the television 13 shown in
FIG. 1, the speaker device 10 stores, for example, music input from an audio cable connected to a
personal computer or an external hard disk, music input via a network, etc. (See FIG. 3), etc., and
reproduced from the built-in speaker units 23-25. In addition, the speaker apparatus 10 of this
embodiment is an apparatus which can change and use direction of case 21, as shown in FIG. 2
mentioned later.
[0023]
In the speaker device 10, two first speaker units 23 are attached to a front surface 21A facing
the listening position 210 in the state shown in FIG. Although the two first speaker units 23 have
the same configuration, when they are described separately, as shown in FIG. 1, the alphabet
after the reference numeral, the first speaker unit 23L (left) And the first speaker unit 23R (light)
will be described. The same applies to the other second speaker units 24L and 24R and the third
speaker units 25L and 25R.
[0024]
In the state shown in FIG. 1, the plane 21A is in a state in which the plane is in the vertical
direction and the horizontal direction. In the case 21, the first speaker unit 23L is attached to the
left end portion of the surface 21A, and the first speaker unit 23R is attached to the right end
portion. The two first speaker units 23L and 23R both face the listening position 210.
[0025]
In addition, the first speaker unit 23 has a smaller diameter than the other second and third
speaker units 24 and 25. Here, the aperture means, for example, the diameter of a cone-shaped
diaphragm. In addition, the first and second speaker units 23 and 24 of the present embodiment
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have the same configuration as a full range speaker although they have different diameters. In
general, the smaller the aperture of the speaker unit, the better the reproduction of the high
frequency band, and the larger the aperture, the better the reproduction of the low frequency
band. For this reason, the first speaker unit 23 has a smaller aperture than the second speaker
unit 24, and is configured to be more good at high frequency reproduction. For example, the first
speaker unit 23 functions as a tweeter optimized to output higher frequency sound within the
audible frequency range.
[0026]
The surface 21B faces upward in the state shown in FIG. 1, and the plane is in the longitudinal
direction and the lateral direction. In the case 21, the second speaker unit 24L is attached to the
left end of the surface 21B, and the second speaker unit 24R is attached to the right end. The
second speaker unit 24 is directed upward, which is orthogonal to the direction of the first
speaker unit 23. The second speaker unit 24 has a larger aperture than the first speaker unit 23,
a smaller aperture than the third speaker unit 25, and has a structure that is good at mid-range
reproduction. For example, the second speaker unit 24 functions as a woofer optimized to output
sound in the intermediate frequency band within the audible frequency range.
[0027]
In addition, the third speaker unit 25 is attached to the surface 21B. In the case 21 in the leftright direction, the third speaker unit 25L is attached to the inner side than the second speaker
unit 24L, and the third speaker unit 25R is attached to the inner side than the second speaker
unit 24R. Similar to the second speaker unit 24, the third speaker unit 25 faces upward. The
third speaker unit 25 has a larger aperture than that of the first and second speaker units 23 and
24 and has a structure that specializes in the reproduction of low frequencies, and functions as a
subwoofer.
[0028]
The speaker device 10 also has two receiving units 27A and 27B for receiving infrared rays from
the infrared remote control 230 (see FIG. 3) attached to the speaker device 10. The receiver 27A
is provided at the center of the surface 21A in the left-right direction. The receiver 27 </ b> B is
provided at the center on the side of the surface 21 </ b> B in the left-right direction and on the
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rear side between the third speaker units 25. In the state shown in FIG. 1, the receiving unit 27A
is in the state of facing the listening position 210 side (forward), and the receiving unit 27B is in
the state of turning upward.
[0029]
FIG. 2 shows a state in which the direction of installation of the speaker device 10 is changed and
installed. In the state shown in FIG. 2, the speaker device 10 rotates the direction of the case 21
by 90 degrees so that the surface 21B is directed to the listening position 210 side about an axis
along the left-right direction (longitudinal direction of the case 21). It is in a state of The speaker
device 10 is attached to the wall 203 by an attachment member (not shown), similarly to the
television 13. In the state shown in FIG. 2, the speaker device 10 is in a state in which the second
and third speaker units 24 and 25 face the listening position 210. Further, of the receiving units
27A and 27B, the receiving unit 27B is in the state of facing the listening position 210 side. In
the speaker device 10, the surface 21A (see FIG. 1) faces downward, and the first speaker unit 23
and the receiving unit 27A face the floor 201.
[0030]
The speaker device 10 according to the present embodiment does not switch the input of the
sound signal to the first to third speaker units 23 to 25 in any state of FIG. 1 and FIG. To play.
Here, each of the first to third speaker units 23 to 25 has different apertures, and the directivity
of the emitted sound is also different. The speaker unit generally has higher directivity as the
aperture becomes smaller. In the state shown in FIG. 1 and the state shown in FIG. 2, the
directions of the first to third speaker units 23 to 25 having such directivity with respect to the
listening position 210 are different, and a sound field at the listening position 210 is formed. The
dominant speaker unit will be changed. For example, in the state shown in FIG. 1, the first
speaker unit 23R facing the listening position 210 becomes dominant compared to the other
speaker units 24 and 25 and sounds heard in the ear of the listener 220 (see FIG. 3) The degree
of influence is increased. For this reason, even if the same music is played back, there is a
problem that the sound quality at the listening position 210 changes in each state of FIG. 1 and
FIG. So, in the speaker apparatus 10 of this embodiment, the process which suppresses the sound
quality change in the listening position 210 by the difference in such an installation direction is
implemented. As a result, in the speaker device 10, when changing the installation direction,
sound reproduction is performed with the sound quality change suppressed while outputting
from all the speaker units 23 to 25 instead of switching the speaker units to be output.
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[0031]
FIG. 3 is a block diagram showing the configuration of the speaker device 10. As shown in FIG. 3,
the speaker device 10 integrally controls the decoder unit 31, the post processing unit 33, the D
/ A converter 35, the electronic volume 37, the power amplifier (power amplification circuit) 39,
and the like. Controller 41 and the like. The decoder unit 31 and the post-processing unit 33 are
realized by, for example, a DSP (Digital Signal Processor).
[0032]
The decoder unit 31 inputs an audio signal from a digital audio device such as a DVD player or a
super audio CD player in addition to the television 13, and outputs, for example, a multi-channel
signal of 2.1 channels. The decoder unit 31 has, for example, a bit stream signal from a DIR
(Digital Interface Receiver), a multi-channel PCM signal from a D / A converter, and a multichannel bit from an HDMI (High Definition Multimedia Interface) terminal. The stream signal is
input, and the data compressed by Dolby Digital, DTS (Digital Theater Systems), AAC (Advanced
Audio Coding), etc. is expanded and added to the left (L) channel, right (R) channel, and low
frequency band And outputs a 2.1 channel signal having a low frequency range (LFE) channel
containing a large amount of
[0033]
The post processing unit 33 includes four high pass filters 43, two low pass filters 45, an
equalizer correction unit 47, a delay correction unit 49, a level correction unit 51, and the like.
The post-processing unit 33 applies an equalizer of the stereo two-channel (L, R) signal input
from the decoder unit 31 to the left and right high-pass filters 43 corresponding to the first and
second speaker units 23 and 24, respectively. Output to the correction unit 47. The high pass
filter 43 attenuates the component of the frequency band lower than a predetermined cutoff
frequency and selectively passes the band component corresponding to the reproduction band of
the first and second speaker units 23 and 24. The cutoff frequency of the high pass filter 43 is,
for example, 100 Hz. Therefore, in the speaker device 10 of the present embodiment, acoustic
signals of the same frequency band (for example, middle band or more) are input to the first
speaker unit 23 and the second speaker unit 24 having different apertures and sound emission
directions. Ru.
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[0034]
Also, the post-processing unit 33 is an adder 53 in which the two-channel (L, R) signals input
from the decoder unit 31 and the bass (LFE) channel signals correspond to the left and right of
the third speaker unit 25. Is input to The adder 53 adds the signal of the LFE channel and the
signal of the L channel, and outputs the result to the low pass filter 45 as a left output signal
output from the third speaker unit 25L. The adder 53 adds the signal of the LFE channel and the
signal of the R channel, and outputs the result to the low pass filter 45 as a right output signal
output from the third speaker unit 25R. The low pass filter 45 attenuates the component of the
frequency band higher than a predetermined cutoff frequency, and selectively outputs the band
component corresponding to the reproduction band of the third speaker unit 25 to the equalizer
correction unit 47.
[0035]
The equalizer correction unit 47 corrects the difference between the frequency characteristics of
the first and second speaker units 23 and 24 which differ in the frequency band in which they
excel by the difference in aperture. Since the first speaker unit 23 has a relatively small aperture,
it excels in high frequency sound reproduction compared to the second speaker unit 24. The
reproduction of the midrange is compensated by the second speaker unit 24.
[0036]
Further, as described above, in the state shown in FIGS. 1 and 2, the dominant speaker unit is
changed. For example, in the state shown in FIG. 1, the influence of the first speaker unit 23 on
the ears of the listener 220, that is, the influence of the higher-range sound becomes greater. An
acoustic signal in the same frequency band as that of the first speaker unit 23 is input to the
second speaker unit 24. Therefore, the equalizer correction unit 47 performs, for example, a
process of emphasizing the middle frequency band where the first speaker unit 23 is not good
with respect to the sound signal input to the second speaker unit 24. Alternatively, the equalizer
correction unit 47 performs, for example, processing to attenuate the high frequency band of the
sound signal input to the first speaker unit 23 which becomes dominant. In this manner, the
equalizer correction unit 47 emphasizes or attenuates the frequency band that the first and
second speaker units 23 and 24 excel or inadvertise, so that the frequency band that is
insufficient as the sound supplied to the listening position 210 To reduce the frequency band
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that is supplied excessively or is supplied.
[0037]
Further, in the case shown in FIG. 2, the equalizer correction unit 47 performs processing
opposite to that shown in FIG. 1. Specifically, the equalizer correction unit 47 performs, for
example, a process of emphasizing the high frequency band, which the second speaker unit 24 is
not good at, for the sound signal input to the first speaker unit 23, The sound signal input to the
second speaker unit 24 is processed to attenuate the mid frequency band. It is to be noted that
the equalizer correction unit 47 may, for example, when the sound signal input to the third
speaker unit 25 includes a portion overlapping the frequency band of the sound signal input to
the first and second speaker units 23 and 24. The same process may be performed on the sound
signal input to the third speaker unit 25.
[0038]
The delay correction unit 49 corrects the delay of the sound at the listening position 210 which
changes in each state shown in FIGS. 1 and 2. Ideally, the sound emitted from the speaker device
10 is felt as if the listener 220 at the listening position 210 is hearing from one point sound
source located ahead. However, for example, in the state shown in FIG. 1, the second and third
speaker units 24 and 25 face upward, and the distance for the sound to be transmitted from the
speaker units 24 and 25 to the listening position 210 in the room 200 is It becomes longer than
the distance which the sound of the 1st speaker unit 23 transmits. As a result, the sounds
emitted from the second and third speaker units 24 and 25 have a delay before reaching the
listening position 210. Similarly, in the state shown in FIG. 2, the sound emitted from the first
speaker unit 23 is delayed because the distance to be transmitted is increased. For this reason,
the listener 220 feels strange that the sound emitted from the plurality of sound sources, not the
point sound source, is emitted by the sounds simultaneously emitted from the speaker units 23
to 25 entering the ear at different timings. There is a risk of feeling
[0039]
In addition, the sound emitted from one of the first and second speaker units 23 and 24 and the
sound delayed for a predetermined time from the sound repeatedly reach the listening position
210, thereby causing a peak on the frequency characteristic or A dip occurs periodically. As a
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result, for example, sound in a specific frequency band in the audible range may be emphasized
or muffled. On the other hand, in order to correct the delay of the sound in each state, for
example, in the state shown in FIG. 1, the delay correction unit 49 emits the sound from the
second and third speaker units 24 and 25 in the state shown in FIG. A delay according to the
difference in the distance to be transmitted is given between the time when the first speaker unit
23 emits the sound. Thus, ideally, even if the direction of installation of the speaker device 10 is
changed, the phases of the sound waves arriving from the speaker units 23 and 24 to the
listening position 210 are aligned, and the listener 220 feels uneasy It becomes possible to give
the sense of hearing from the sound source. The delay correction unit 49 may execute the same
process on the acoustic signal input to the third speaker unit 25.
[0040]
In addition, the sound pressure of the sound to be reproduced is different because the first and
second speaker units 23 and 24 have different diameters. For this reason, in each state shown in
FIG. 1 and FIG. 2, by changing the speaker unit facing the listening position 210, the sound
pressure level of the sound entering the ear of the listener 220 is also changed. The level
correction unit 51 performs processing to suppress such a change in sound pressure level. More
specifically, for example, in the state illustrated in FIG. 1, the level correction unit 51 reduces the
level of the acoustic signal input to the first speaker unit 23 facing the listening position 210,
and the second speaker unit 24. Perform at least one of the processes of raising the level of the
acoustic signal input to the Ideally, if the volume value ev of the electronic volume 37 is the
same, the level correction unit 51 adjusts the sound pressure at the listening position 210 to be
the same even if the installation direction of the speaker device 10 is changed. It is preferable to
The sound pressure level adjusted by the level correction unit 51 can be set in advance by
performing simulation or measurement.
[0041]
The digital acoustic signal processed by each correction unit 47, 49, 51 of the post-processing
unit 33 is input to the D / A converter 35. The D / A converter 35 converts the digital acoustic
signal into an analog acoustic signal, and outputs the analogized acoustic signal to the electronic
volume 37. The electronic volume 37 adjusts the voltage level of the acoustic signal with the
volume value ev instructed by the controller 41.
[0042]
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The controller 41 is, for example, a processing circuit mainly composed of a CPU. The controller
41 detects the direction of the case 21 and sets the contents of the acoustic processing by the
respective correction units 47, 49, 51 according to the detected direction. The speaker device 10
includes a switch 57 (for example, a dip switch) as a detection unit that detects the direction of
the case 21. The switch 57 is provided on the back surface of the speaker device 10 (the surface
facing the surface 21 B in FIG. 1 in the vertical direction). The listener 220 operates the switch
57 in accordance with the direction in which the speaker device 10 is installed. Thereby, the
controller 41 can detect the direction by turning on / off the switch 57. The detection means is
not limited to the switch 57, and may be a sensor (a gyro sensor or the like). In this case, the
speaker device 10 can automatically detect the direction.
[0043]
Also, the receiving units 27A and 27B decode the infrared code signal sent from the infrared
remote control 230, and output the decoded result to the controller 41. The controller 41
increases or decreases, for example, the volume value ev of the electronic volume 37 in
accordance with the code signal input from the receiving units 27A and 27B. As a result, the
listener 220 can change the volume of the sound to be reproduced by operating the infrared
remote control 230. Note that, for example, the controller 41 switches on / off of the power
supply of the speaker device 10 based on the decoded signal, switches the source to which the
acoustic signal is input, or the contents of the acoustic processing (equalizing by the equalizer
correction unit 47 You may change the setting value etc.).
[0044]
The memory 55 of the speaker device 10 stores various data and programs used by the
controller 41 for control, and stores, for example, a program executed by a DSP such as the postprocessing unit 33.
[0045]
Then, the electronic volume 37 outputs an acoustic signal whose voltage value has been adjusted
to the power amplifier 39.
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The power amplifier 39 amplifies the input acoustic signal and outputs it to the first to third
speaker units 23 to 25. The speaker device 10 outputs, for example, a left output signal from the
first speaker unit 23L and a right output signal from the first speaker unit 23R. Thus, the speaker
device 10 performs sound reproduction according to the direction of the device.
[0046]
Incidentally, the case 21 is an example of a case. The equalizer correction unit 47 is an example
of an equalizer correction unit. The delay correction unit 49 is an example of a delay correction
unit. The level correction unit 51 is an example of a level correction unit. The switch 57 is an
example of detection means. The surface 21A is an example of the first surface. The surface 21B
is an example of the second surface.
[0047]
As mentioned above, according to the above-mentioned embodiment, the following effects are
produced. (1) The speaker device 10 is provided with first and second speaker units 23 and 24
having different apertures and sound emission directions. The speaker device 10 is placed on the
rack 15 with the first speaker unit 23 facing the listening position 210 as shown in FIG. 1 and a
wall facing the second speaker unit 24 shown in FIG. 2 facing the listening position 210. It can
be installed in two states with the state of being hung on 203. Further, the speaker device 10 is
provided with a switch 57 operated by the listener 220 according to the installation direction of
the device, and the controller 41 detects the direction by ON / OFF of the switch 57. The
controller 41 controls the equalizer correction unit 47 in accordance with the direction of the
case 21. The equalizer correction unit 47 sets the frequency characteristics of the sound signal
input to the first and second speaker units 23 and 24 so that the sound quality does not change
at the listening position 210 due to the difference in aperture and emission direction of each
speaker unit 23 and 24. Correct the As a result, it is possible to suppress the change in sound
quality at the listening position 210 due to the change in the direction of installation of the
speaker device 10.
[0048]
(2) The delay correction unit 49 corrects the delay of the sound emitted from each of the first
and second speaker units 23 and 24, and aligns the phase of the sound wave at the listening
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position 210. As a result, the listener 220 can listen to a comfortable sound without discomfort.
[0049]
(3) In order to suppress the change in the sound pressure level caused by the difference in
aperture of the first and second speaker units 23 and 24, the level correction unit 51, for
example, in the state shown in FIG. The processing etc. which lowers the level of the sound signal
inputted into the 1st speaker unit 23 which faces to are performed. Thereby, it is possible to
suppress the change of the sound pressure at the listening position 210 when the direction of
installation of the speaker device 10 is changed.
[0050]
(4) The speaker device 10 includes the third speaker unit 25 as a subwoofer for low-range
reproduction in addition to the full-range first and second speaker units 23 and 24 having
different apertures. Thereby, the speaker device 10 utilizes the third speaker unit 25 and
reproduces the sound of the bass region channel when the sound signal of the 2.1 channel is
input, whereby the first and second speaker units 23 and 24 are generated. It is possible to play
powerful bass and heavy bass, which is difficult only by itself.
[0051]
(5) In the speaker device 10, the units on the left side and the units on the light side of the
speaker units 23 to 25 are dispersedly disposed on both side portions in the left-right direction
in which the case 21 is extended. On the other hand, a sound with a sense of expansion is
emitted in the left-right direction (horizontal direction). In the speaker device 10, only the first
speaker unit 23 having the smallest diameter among the three types of speaker units 23 to 25 is
provided on the surface 21A, and as shown in FIG. Of the first speaker unit 23 is made smaller in
accordance with the aperture of the first speaker unit 23. As a result, the speaker device 10 can
be thinned by narrowing the width in the vertical direction.
[0052]
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The present invention is not limited to the above embodiment, and it goes without saying that
various improvements and changes can be made without departing from the spirit of the present
invention. For example, although the post-processing unit 33 includes the three correction units
47, 49, and 51, the adjustment of the sound quality may be performed only by the equalizer
correction unit 47. In this case, the circuit portion related to the other delay correction unit 49
and the level correction unit 51 becomes unnecessary. In the above embodiment, the acoustic
signal is input to the third speaker unit 25 through the correction units 47, 49, and 51. However,
correction processing is performed on the acoustic signal input to the third speaker unit 25. It
may be a configuration that does not.
[0053]
In addition, the speaker device 10 may not include the third speaker unit 25 for reproducing the
bass range. In addition, although the three correction units 47, 49, and 51 are realized by
executing a corresponding program by the DSP, the three correction units 47, 49, and 51 are
implemented by hardware that includes the correction units 47, 49, and 51 with arithmetic
circuits and the like. You may
[0054]
Further, in the above embodiment, acoustic signals of the same frequency band (more than
middle band) are input to the first and second speaker units 23 and 24, but are input to the first
and second speaker units 23 and 24. The acoustic signals may not be identical in all bands, or
may partially overlap. Further, the installation direction and position of the speaker device 10
shown in FIGS. 1 and 2 are an example, and can be changed as appropriate. For example, the
speaker device 10 may be installed with the first speaker unit 23 facing upward (ceiling side) and
the second and third speaker units 24 and 25 facing the listening position 210. In this case, since
the left and right positions of the speaker units 23 to 25 are reversed, the left speaker unit (such
as the first speaker unit 23L) and the light speaker unit (such as the first speaker unit 23R) are
input. The speaker device 10 may be provided with a circuit or the like that switches an acoustic
signal.
[0055]
Further, the speaker device 10 does not have to be disposed along the wall 203, and may be at a
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distance from the wall 203 by a certain distance. Further, the method of fixing the position of the
speaker device 10 is an example. For example, in the case shown in FIG. 1, the speaker device 10
may be fixed to the wall 203 without being placed on the rack 15. Further, the signal input to the
speaker device 10 is not limited to the 2.1 ch signal, but may be a stereo 2 ch signal. In this case,
the speaker device 10 may be configured to input, to the third speaker unit 25, a low frequency
band that can not be reproduced by the first and second speaker units 23 and 24. Further, the
signal input to the speaker device 10 may be a multi-channel signal exceeding 2.1 ch. In this
case, a speaker may not be installed behind or above the listener 220, and so-called virtual
surround reproduction may be provided to generate sounds of surround channels behind and
above from a plurality of speakers installed forward. . More specifically, the speaker device 10
includes, for example, a localization processing unit that causes the signal of the back channel of
the input sound signal to be localized at a virtual speaker position behind the listener 220, and a
left output signal of the sound signal. For the right output signal, only the left output signal
emitted from the speaker unit reaches the left ear of the listener 220 and only the right output
signal emitted from the speaker unit reaches the right ear of the listener 220 The configuration
may include a crosstalk / cancel processing unit.
[0056]
Further, the number, the shape, the position, and the like of each member of the speaker device
10 in the above embodiment are an example, and can be changed as appropriate. For example,
although the case 21 is in the shape of a rectangular solid long in the left-right direction, the
present invention is not limited to this, and the case 21 may be appropriately changed to other
shapes such as a rounded shape, an elliptical shape, or a curved shape.
[0057]
DESCRIPTION OF SYMBOLS 10 Speaker apparatus, 21 case, 23 1st speaker unit, 24 2nd speaker
unit, 25 3rd speaker unit, 47 equalizer correction part, 49 delay correction part, 51 level
correction part, 57 switch, 210 listening position.
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