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JP2016101333

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2016101333
Abstract: In a toilet bowl system having a muffling function, a spatial range in which a muffling
effect can be obtained is widened by superposing sounds in reverse phase on sounds generated
by the toilet bowl. The speaker device 14 has a function of collecting the sound generated by the
toilet device 1 by the microphone device 13 and reproducing the sound of the opposite phase
from the speaker device 14 by muffling the sound generated by the toilet device 1. Has
directivity in the radiation direction of the reproduced sound, and the radiation direction is
aligned with the propagation direction of the sound generated by the toilet bowl device 1.
[Selected figure] Figure 1
Toilet bowl device
[0001]
The present invention relates to an improvement of a toilet bowl system having a function of
silencing the noise generated by the toilet bowl.
[0002]
Conventionally, in such a system as described above, the sound generated by the toilet device is
collected by the microphone device, and muffling is performed by reproducing the sound of the
opposite phase from the speaker device disposed at the appropriate position.
For example, in the portable toilet noise reduction system described in the following Patent
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1
Document 1, the speaker device is installed at a position on the front diagonal of the toilet bowl
device, and the sound generated by the toilet bowl device is opposite to the reverse phase. I try to
hit the sound.
[0003]
JP, 2008-122886, A
[0004]
According to the method described in Patent Document 1, assuming that the sound generated by
the toilet device is a simple sine wave, a complete noise reduction effect can be obtained between
the toilet device and the speaker device.
However, since the sound generated by the toilet bowl device is not a simple sine wave but has a
complicated sound waveform, it is difficult to obtain the silencing effect in a wide space area by
the method as described in Patent Document 1 Conceivable.
[0005]
The present invention has been made focusing on such a problem, and in a toilet system having a
muffling function, a spatial range in which a muffling effect can be obtained by superposing a
sound in reverse phase on the sound generated by the toilet device. The goal is to make
[0006]
The present invention comprises a toilet device provided with a microphone device and a speaker
device, and has a function of collecting the sound generated by the toilet device with the
microphone device and reproducing the sound of the opposite phase from the speaker device. In
the toilet bowl device system, the speaker device has directivity in the radiation direction of the
reproduced sound, and the radiation direction is aligned with the propagation direction of the
sound generated by the toilet bowl device.
[0007]
In the present invention, since the radiation direction of the reproduction sound of the speaker
device is aligned with the propagation direction of the sound generated by the toilet device, the
spatial range in which the muffling effect is obtained is broadened.
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[0008]
FIG. 1 is a basic block diagram of an example toilet bowl system according to an embodiment of
the present invention.
It is a perspective view explaining the concrete composition of this embodiment.
It is a top view explaining the muffling operation of this embodiment.
It is a top view explaining the muffling operation of this embodiment. It is a top view explaining
the modification of this embodiment. (A), (b) is a perspective view which shows an example of the
speaker apparatus suitable for this embodiment and its modification. The speaker devices
themselves shown in (a) and (b) are identical, and the difference between the two is the radiation
direction of the reproduced sound. It is a perspective view explaining the structure of the other
modification of this embodiment. It is a top view explaining the muffling operation of the
modification shown in FIG. It is a side view explaining the muffling operation of the modification
shown in FIG.
[0009]
FIG. 1 is a basic block diagram of an example toilet bowl system. The toilet device system
comprises a toilet device 1 equipped with a microphone device 13 and a speaker device 14. The
toilet apparatus 1 is installed in the room of the toilet room 2. The toilet apparatus 1 is a flush
type, and is provided with a water supply passage 11 and a drainage passage 12 on the upstream
side and the downstream side of the bowl portion 10 for receiving stools. The water supply
passage 11 is composed of pipes connected to a water stop valve, a solenoid valve, etc. (not
shown). Moreover, the drainage channel 12 is comprised by the drainage trap part etc. (not
shown) connected to a sewer pipe. The toilet apparatus 1 is provided with a microphone
apparatus 13 and has a function of collecting the sound generated during use of the toilet
apparatus 1 by the microphone apparatus 13 and reproducing the sound of the opposite phase
from the speaker apparatus 14 to mute the sound. have.
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[0010]
The sound generation place in the toilet bowl device 1 is basically considered to be the bowl
portion 10 or the drainage passage 12, but in the present embodiment, the microphone device
13 is close to the bottom of the bowl portion 10 or the flow passage wall of the drainage passage
12 Is provided. The microphone device 13 collects the sound generated in the bowl portion 10
(during use) and the sound generated in the drainage channel 12 (during drainage). If the
microphone device 13 is provided in such a place, the sound generated by the toilet device 1 can
be collected near the sound source. That is, the sound close to the direct sound of the sound
generated by the toilet device 1 can be collected, and as a result, the accuracy of the sound
processing for muffling can be enhanced, and a high muffling effect can be obtained.
[0011]
The speaker device 14 is provided on the door 3 of the toilet room 2. However, the speaker
device 14 may be provided at another place, for example, a wall surface around the door 3 or the
toilet bowl device 1 itself. As the speaker device 14, one having directivity in the radiation
direction of the reproduction sound is used, and the radiation direction is made to be in line with
the propagation direction of the sound generated by the toilet bowl device 1. That is, their
directions are made to substantially coincide. Thus, if the radiation direction of the reproduction
sound of the speaker device 14 is determined, there is an effect that the spatial range in which
the noise reduction effect can be obtained becomes wide.
[0012]
The sound processing unit 15 is a circuit block that executes sound processing related to the
microphone device 13 and the speaker device 14. When the microphone device 13 and the
speaker device 14 are separated by a predetermined distance, a delay time occurs before the
sound (sound wave) collected by the microphone device 13 reaches the location of the speaker
device 14. The delay time is determined by the distance between the two and the speed of sound.
Also, the volume reduction when the sound collected by the microphone device 13 reaches the
location of the speaker device 14 can be predicted from the distance between the two. Therefore,
the sound processing unit 15 collects the microphone device 13 based on the value of the delay
time and the value of the amplification factor registered in advance assuming the average size of
the toilet room (the distance between the toilet device and the door). It is sufficient to execute a
process of delaying and amplifying the antiphase sound generated from the sound produced and
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reproducing the sound from the speaker device 14. If the sound processing unit 15 has such a
configuration, a good muffling effect can be obtained even if the speaker device 14 and the toilet
device 1 are separated. It should be noted that the operator may measure the size of the toilet
room 2 and the like to set and register an appropriate delay time value and amplification factor
value when the toilet device 1 is installed.
[0013]
The sound processing unit 15 may be configured by an analog circuit, a digital circuit, or a
hybrid circuit of analog and digital. For example, an A / D conversion circuit that sequentially
digitizes a sound signal collected by the microphone device 13, a FIFO circuit that sequentially
stores the digital value and outputs the digital value after a predetermined time, and analog
converts the digital value output from the FIFO circuit The sound processing circuit may be
configured by a D / A conversion circuit and an amplifier circuit that amplifies the analog signal
(not shown). With such a circuit configuration, the process of generating the sound signal of the
opposite phase from the sound signal collected by the microphone device 13 may be performed
at any stage. Further, in order to enhance the muffling effect, various filtering processes may be
performed by the sound processing unit 15.
[0014]
In FIG. 1, the sound wave form collected by the microphone device 13 is indicated by a solid line
in the graph G1, and the sound wave form observed at the location of the speaker device 14 is
indicated by a solid line in the graph G2. The sound waveform reproduced by is shown by a
dotted line in the graph G2. The time axes of the graphs G1 and G2 coincide with their origins.
The delay time is indicated by Td in the graph G2. When the sound wave form (solid line)
propagated as shown by the graph G2 and the sound wave form (broken line) reproduced by the
speaker device 14 are in a phase relationship opposite to each other, a muffling effect is
obtained.
[0015]
The operation unit 20 is configured by a switch or the like that issues a drainage command or
the like. The operation unit 20 may be provided with an on / off switch of the muffling function
so that the muffling function can be operated by manual operation. Alternatively, a human sensor
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may be provided in the operation unit 20 (which may be another place), and the muffling
function may be automatically activated while the toilet bowl device 1 is in use.
[0016]
FIG. 2 is a perspective view for explaining a specific configuration of the present embodiment.
The toilet room 2 describes only the wall surface provided with the door 3 and the other wall
surfaces are omitted. The toilet bowl device 1 is installed at the center of the floor of the toilet
room 2. A microphone device 13 is provided on the bottom wall surface of the bowl portion 10
of the toilet bowl device 1. Illustration of the sound processing unit and the operation unit is
omitted.
[0017]
The microphone device 13 is a waterproof type, and is fixed to a bottom wall surface of the bowl
portion 10 in a state where a part (sound collecting portion) is exposed. The microphone device
13 may be fitted and fixed in a hole formed in the bottom wall surface of the bowl portion 10.
Alternatively, a thin microphone device 13 may be attached to the inside of the bottom of the
bowl portion 10. At this time, if the microphone device 13 is of a battery built-in wireless type,
maintenance of the microphone device 13 is facilitated. Alternatively, if the microphone device
13 is of a stethoscope type, it is possible to collect the sound in the bowl portion 10 or the
drainage channel from the outside of the bowl portion 10 through the wall surface. The place of
the microphone device 13 is not limited to this, and may be the upper surface portion (bowl rim)
of the toilet device 1 or the like.
[0018]
The sound generated during use of the toilet device 1 and the sound generated during drainage
are collected by the microphone device 13 and spread from the opening of the bowl portion 10
to the toilet room 2. Among them, it is considered that the sound leaking to the outside of the
toilet room 2 is mainly transmitted through the door 3. The outline sound wave form of this
sound is indicated by a broken line W1 in the figure, and the propagation direction is indicated
by an arrow A. The present embodiment is intended to mute such noise leaking to the outside of
the toilet room 2.
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[0019]
The speaker device 14 is provided on the outer surface of the door 3. The connection between
the speaker device 14 and the toilet device 1 may be wired or wireless, but the latter
configuration is easy. Further, as the speaker device 14, one having directivity in the radiation
direction of the reproduced sound as described above is used, and the radiation direction is
aligned with the propagation direction of the sound leaking to the outside of the toilet room 2.
The reproduced sound waveform of such a speaker device 14 is indicated by a dotted line W2 in
the figure.
[0020]
The sound processing unit of the toilet device 1 sets in advance the delay time of the reverse
phase sound generated from the sound collected by the microphone device 13, specifically, the
location of the speaker device 14 of the sound collected by the microphone device 13. The
speaker device 14 reproduces the sound after the lapse of the delay time required for the
propagation. If the setting of the delay time and the amplification factor of the reproduction
sound at this time is appropriate, the sound leaking to the outside of the toilet room 2 and the
reproduction sound of the speaker device 14 have a phase relationship opposite to each other.
The muffling effect is exhibited for a certain range on the side.
[0021]
FIG. 3 is a plan view further illustrating the muffling operation of the present embodiment. It will
become like FIG. 3 when the toilet room of FIG. 2 is planarly viewed.
[0022]
The sound generated during use of the toilet bowl device 1 and the sound generated during
drainage spread from the opening of the bowl portion 10 to the toilet room 2 and further leak to
the outside of the toilet room 2. The manner in which this sound propagates in the horizontal
direction is indicated by concentric circles S1 in the figure. The concentric circles S1 are
horizontal to the floor surface, and the phases of the sound waves coincide on the same
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circumference.
[0023]
The speaker device 14 has directivity in the radiation direction of the reproduced sound, and the
radiation direction is the propagation direction (arrow A) at the location of the speaker device 14
of the sound generated by the toilet device 1, ie, centered on the toilet device 1. Adjusted in the
radial direction of the horizontal circle. The reproduction sound of the speaker device 14 spreads
in such a radiation direction. The propagation mode of this generated sound is indicated by a
point concentric circle S2 in the figure. The point concentric circle S2 is also horizontal to the
floor surface, and the phases of the sound waves coincide on the same circumference.
[0024]
Here, if the reverse phase sound generated from the sound collected by the microphone device
13 is reproduced from the speaker device 14 after an appropriate delay time has elapsed, the
sound generated by the toilet device 1 and the reproduced sound of the speaker device 14 Are in
opposite phase to each other, and the muffling effect is exhibited for a wide horizontal range W
indicated by hatching in the drawing.
[0025]
FIG. 4 is a side view further illustrating the muffling operation of the present embodiment.
A side view of the toilet room of FIG. 2 is as shown in FIG.
[0026]
The manner of vertical propagation of the sound generated during use of the toilet bowl device 1
is indicated by concentric circles S1 in the figure. The concentric circles S1 are perpendicular to
the floor surface, and the phases of the sound waves coincide on the same circumference.
[0027]
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The radiation direction of the reproduction sound of the speaker device 14 is adjusted to the
propagation direction (arrow A) at the location of the speaker device 14 of the sound generated
by the toilet bowl device 1, that is, the radial direction of the vertical circle centered on the toilet
bowl device 1 There is. The reproduction sound of the speaker device 14 spreads in such a
radiation direction. The propagation mode of this reproduced sound is indicated by a point
concentric circle S2 in the figure. The point concentric circle S2 is also perpendicular to the floor
surface, and the phases of the sound waves coincide on the same circumference.
[0028]
Here, if the reverse phase sound generated from the sound collected by the microphone device
13 is reproduced from the speaker device 14 after an appropriate delay time has elapsed, the
sound generated by the toilet device 1 and the reproduced sound of the speaker device 14 Are in
opposite phase to each other, and the muffling effect is exhibited for a wide vertical range W
indicated by hatching in the drawing.
[0029]
FIG. 5 is a plan view for explaining a modification in which a plurality of speaker devices are
provided.
Except for the number of loudspeaker devices 14, the basic configuration of this modification is
the same as that of the above embodiment.
[0030]
In this modification, two speaker devices 14A and 14B are provided on the door 3 of the toilet
room 2 at desired intervals. The speaker devices 14A and 14B both have the radiation direction
of the reproduction sound aligned with the propagation direction of the sound generated by the
toilet device 1, but the propagation direction is different at each position, so the reproduction of
the speaker devices 14A and 14B is performed. The radiation directions of the sound are also
different from each other.
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[0031]
Here, if the reverse phase sound generated from the sound collected by the microphone device
13 is reproduced from the speaker device 14A after an appropriate delay time has elapsed, the
sound generated by the toilet device 1 and the reproduced sound of the speaker device 14A Are
in opposite phase to each other, and the muffling effect is exhibited for a wide range W indicated
by hatching in the drawing. The same applies to the speaker device 14B. In this modification,
since each of the plurality of speaker devices 14 exhibits the noise reduction effect, the noise
reduction effect is exhibited for a wider horizontal range as a whole.
[0032]
Furthermore, an example of the speaker apparatus suitable for the said embodiment and its
modification is demonstrated concretely. 6 (a) and 6 (b) are perspective views of such a speaker
device, the speaker devices themselves in (a) and (b) are identical, and the difference between the
two is the radiation direction of the reproduced sound. That is, in FIG. 6 (a), the radiation
direction of the reproduced sound is adjusted upward, and in (b), it is angularly adjusted
downward.
[0033]
The speaker device 14 includes a front panel 14b in which a buried hole of the speaker unit 14a
is formed at a central portion, a speaker unit 14a embedded in the hole so as to be adjustable in
angle, and a box 14c for sealing the rear space of the speaker unit 14a. Become. Screw holes for
fixing are formed at each corner of the front panel 14b. The connection between the speaker
device 14 and the toilet device may be wired or wireless.
[0034]
The speaker unit 14a is a dynamic type, and a vibrating surface (not shown) behind the
protective mesh emits reproduced sound in both forward and backward directions. However,
since the reproduction sound to the rear is blocked by the box 14c, as a result, only the
reproduction sound to the front is emitted, and directivity is obtained in the radiation direction of
the reproduction sound. Since the periphery of the speaker unit 14a is surrounded by the front
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panel 14b, it is difficult for the reproduced sound radiated forward to turn backward.
[0035]
With such a configuration of the speaker device 14, the speaker device 14 can be easily buried
and fixed to the door of the toilet room or the like. Further, since the speaker unit 14a is
adjustable in angle, the radiation direction of the reproduced sound can be easily matched with
the propagation direction of the sound generated by the toilet device.
[0036]
Then, the modification which provided the speaker apparatus integrally with the toilet bowl
apparatus is demonstrated. FIG. 7 is a perspective view for explaining a modification in which the
speaker device is provided on the front surface of the toilet bowl device. The basic configuration
of this modification is the same as that of the embodiment shown in FIG.
[0037]
The outline sound wave form of the sound which generate | occur | produces in the toilet device
1 and leaks outside the toilet room 2 is shown by the broken line W1 in the figure, and the
propagation direction is shown by the arrow A.
[0038]
The speaker device 14 is provided on the front portion 1 a (bowl rim) of the toilet device 1.
In such a case, the speaker device 14 may get wet, so it is preferable to use a waterproof type or
a simple waterproof type. The radiation direction of the reproduction sound of the speaker
device 14 is aligned with the propagation direction (arrow A) of the sound generated by the toilet
device 1 and leaking to the outside of the toilet room 2. The reproduced sound waveform of such
a speaker device 14 is indicated by a dotted line W2 in the figure.
[0039]
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Here, if the reverse phase sound generated from the sound collected by the microphone device
13 is reproduced from the speaker device 14 after an appropriate delay time has elapsed, the
sound generated by the toilet device 1 and the reproduced sound of the speaker device 14 Are in
opposite phase to each other, and the muffling effect is exhibited for a certain range in front of
the toilet bowl device 1. In particular, in this modification, the speaker device 14 is provided near
the sound generation place of the toilet device 1, so the range in which the muffling effect can be
obtained is further broadened. The noise after noise is leaked from the door 3 of the toilet room,
but the noise is small and difficult to hear.
[0040]
FIG. 8 is a plan view further illustrating the muffling action of this variation. The basic
configuration of the toilet room 2 is common to FIG. The horizontal propagation of sound
generated by the toilet bowl device 1 is indicated by concentric circles S1 in the figure.
Concentric circles S1 are horizontal to the floor surface. The radiation direction of the
reproduction sound of the speaker device 14 is adjusted to the propagation direction (arrow A) at
the location of the speaker device 14 of the sound generated by the toilet bowl device 1, that is,
the radial direction of the vertical circle centered on the toilet bowl device 1 There is. The
propagation mode of the reproduction sound of the speaker device 14 is indicated by a point
concentric circle S2 in the figure. The point concentric circle S2 is also horizontal to the floor
surface.
[0041]
Here, if the reverse phase sound generated from the sound collected by the microphone device
13 is reproduced from the speaker device 14 after an appropriate delay time has elapsed, the
sound generated by the toilet device 1 and the reproduced sound of the speaker device 14 Are in
opposite phase to each other, and the muffling effect is exhibited for a wide horizontal range W
indicated by hatching in the drawing.
[0042]
FIG. 9 is a side view further illustrating the muffling action of this modification.
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The basic configuration of the toilet room 2 is common to FIG. The mode of propagation of the
sound generated by the toilet bowl device 1 in the vertical direction is indicated by concentric
circles S1 in the figure. Concentric circles S1 are perpendicular to the floor surface. The radiation
direction of the reproduction sound of the speaker device 14 is adjusted to the propagation
direction (arrow A) at the location of the speaker device 14 of the sound generated by the toilet
bowl device 1, that is, the radial direction of the vertical circle centered on the toilet bowl device
1 There is. The propagation mode of the reproduction sound of the speaker device 14 is
indicated by a point concentric circle S2 in the figure. The point concentric circle S2 is also
perpendicular to the floor surface.
[0043]
Here, if the reverse phase sound generated from the sound collected by the microphone device
13 is reproduced from the speaker device 14 after an appropriate delay time has elapsed, the
sound generated by the toilet device 1 and the reproduced sound of the speaker device 14 Are in
opposite phase to each other, and the muffling effect is exhibited for a wide vertical range W
indicated by hatching in the drawing.
[0044]
If the door of the toilet room is in the lateral direction as viewed from the toilet bowl device, the
speaker device may be provided on the side of the toilet bowl device.
In such a case, an effect similar to that of the modification can be obtained in the lateral direction
of the toilet bowl device.
[0045]
1 toilet bowl device 2 toilet room 3 door 13 microphone device 14 speaker device 15 sound
processing unit
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