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JP2016036086

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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 JP2016036086
An object of the present invention is to construct a room acoustic system which can use an
existing speaker as it is and can easily enhance presence and expression. SOLUTION: An acoustic
reflection plate 11 made of plastic corrugated cardboard is supported toward the inside of the
room by a plate support 12 extended from a room wall or a ceiling close to the wall, and a sound
output direction is an acoustic reflection plate 11 A room acoustic system 1 comprising: a
speaker 21 disposed facing a predetermined distance apart. [Selected figure] Figure 3
Indoor acoustic system and acoustic attachment for microphone
[0001]
The present invention relates to a room acoustic system and an acoustic attachment for
microphones that enhance the sense of reality, and more particularly to an indoor audio system
and a microphone acoustic attachment that can be applied to existing audio systems, audio
rooms, and karaoke boxes.
[0002]
Audio is highly tasteful and prefers output close to the original sound, but the impressions differ
depending on the playback environment, and emphasis is placed on sensuous indicators that are
difficult to digitize, such as "presence" and "expression" In some cases.
[0003]
03-05-2019
1
Echo processing is known as a simple method for enhancing presence and expression.
Especially in the case of a karaoke box, the echo is set to be high and the volume is raised to
enhance the sense of reality.
In addition, in general homes and the like, for example, a room with a well-resonant board or
flooring is applied to the audio room in order to make the owned speaker sound better.
[0004]
However, the prior art has the following problems. Echo processing is limited in ordinary homes
and karaoke shops, and there is a problem in that it is necessary to replace speakers and
amplifiers for driving the speakers to increase the sense of presence and expression more
naturally, resulting in a large burden.
[0005]
JP-A-62-181599 JP-A-2006-157397 JP-A-2007-180980 JP-A-4-137898
[0006]
The present invention has been made in view of the above, and an object of the present invention
is to construct a room acoustic system which can use an existing speaker as it is and can easily
enhance presence and expression.
Another object of the present invention is to provide a microphone attachment that captures a
user's voice so that it can be easily attached to an existing microphone and voice reproduction
becomes more realistic and expressive in a karaoke box.
[0007]
The present invention is an invention made on the basis of discovery as a result of the inventors
of the present invention earnestly examining the acoustic effect of a speaker through trial and
error.
03-05-2019
2
[0008]
The room acoustic system according to claim 1 is made of plastic corrugated cardboard
supported inside the room by a support extending from an indoor wall, from a ceiling close to the
wall, or from a floor close to the wall. An acoustic reflector is provided, and a speaker is disposed
with a sound output direction facing the acoustic reflector and separated by a predetermined
distance.
[0009]
That is, according to the first aspect of the present invention, it is possible to construct a room
acoustic system in which the speaker is directed to the wall side and reflected by plastic
cardboard for use, thereby easily enhancing presence and expression.
[0010]
In addition, supporting by a support means that the acoustic reflection plate does not interfere
with anything other than the support, that is, it does not contact a wall, a ceiling, a floor, or the
like.
The support extending from the floor adjacent to the wall includes not only the case where the
support extends directly from the floor itself, but also a separately stand-like structure like a
stand.
The inside of the room means the side on which the viewer or user is present, meaning that the
room is generally directed to the center of the room.
The material of the plastic is not particularly limited, but can be made of, for example,
polycarbonate. The sound output direction refers to the direction of the diaphragm of the
speaker, but depending on the speaker, there may be a plurality of diaphragms and a part may be
provided on the side surface or the back surface. In this case, it means the direction in which the
main or multiple diaphragms are facing. It is not necessary for the sound output direction to
coincide with the normal to the acoustic reflector (that is, the speaker does not have to be located
directly in front of the acoustic reflector), and the sound output direction is reflected by the
acoustic reflector and directed to the center of the room Any positional relationship is acceptable.
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3
The acoustic reflection plate may not necessarily be flat, and may have a concave surface.
[0011]
The indoor acoustic system according to claim 2 is the indoor acoustic system according to claim
1, wherein the plastic corrugated cardboard has a structure in which hollow prismatic structures
are connected, and both the vertical width and the horizontal width inside the cross section are 3
mm to 5 mm. It is characterized by being in the range.
[0012]
That is, the invention concerning Claim 2 can acquire a better sound effect.
[0013]
In addition, it can be said that a hollow prismatic structure is a long hole whose cross section is a
rectangle in other words.
The vertical width and the horizontal width can also be referred to as the two-direction lengths of
the cross section.
In addition, although the thickness of the non-hollow part of a plastic corrugated cardboard, ie, a
solid part, is not limited, it shall be about 1 mm-2 mm.
[0014]
A room acoustic system according to claim 3 is characterized in that, in the room acoustic system
according to claim 1 or 2, the supporting point of the acoustic reflection plate is one place.
[0015]
That is, the invention concerning Claim 3 can acquire a better sound effect.
[0016]
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4
The support position is not particularly limited, but if the support is extended from the ceiling,
the vicinity of the center of the upper side of the acoustic reflection plate is extended, and if
extended from the wall or floor, the center of the lower side is extended. , Each can be mentioned.
In addition, it is assumed that there may be a certain size and length with one place.
For example, an aspect may be such that the acoustic reflection plate is sandwiched from the
front and back in a width of 20 cm × 7 cm.
[0017]
In the indoor acoustic system according to claim 4, in the indoor acoustic system according to
claim 1, 2 or 3, the diameter of the diaphragm with the largest diameter of the speaker is 11 cm
or more and 25 cm or less, and the predetermined distance is 50 cm or more It is characterized
by 120 cm.
[0018]
That is, the invention concerning Claim 4 can acquire a better sound effect.
[0019]
Preferably it is 80 cm-100 cm.
[0020]
The size of the acoustic reflection plate depends on the shape of the acoustic reflection plate, but
in the case of a rectangular shape, it is preferable that the length and width be in the range of 60
cm to 100 cm.
When making it elliptical, it is preferable to set it as 50 cm-80 cm of short sides, and 70 cm-110
cm of long sides.
[0021]
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5
The indoor acoustic system according to claim 5 is the indoor acoustic system according to any
one of claims 1 to 4, in which the lead plate is attached to the surface of the speaker housing
opposite to the diaphragm attachment surface. It is characterized by
[0022]
That is, the invention concerning Claim 5 can acquire a better sound effect.
[0023]
The microphone acoustic attachment according to claim 6 is detachably attached to the
microphone used in the karaoke box or to the microphone used in the karaoke box to which the
indoor acoustic system according to any one of claims 1 to 5 is applied. An attachment
comprising a sheet-like member, which is constituted by a long band in one direction and a
tongue piece extending from one long side of the band, and alternate cuts are short at both ends
of the band. Insert the microphone into the belt-like ring that is inserted in the direction and put
the said cuts together, the tongue piece forms a curved surface, and the voice that is directed to
the microphone sound collection unit from the side that becomes the shadow of the user It is
possible to make it reflect.
[0024]
That is, in the invention according to claim 6, the voice collecting ability of the microphone can
be exhibited, and the voice of the user can be captured so as to be voice reproduction with
enhanced presence and expressiveness.
[0025]
In addition, a karaoke box shall show not the shop of a karaoke shop but a room itself in this
application.
The band portion is not necessarily a rectangular base that is long in one direction, but may be
formed of curved curves (arcs) with curvatures in consideration of the taper of the grip hand
portion of the microphone.
The shape of the tongue portion may be circular, oval, rectangular, or heart-shaped, and when a
curved surface is formed, it forms a shape that partially wraps the microphone along the shape of
03-05-2019
6
the microphone sound collecting portion. It is not particularly limited as long as it is.
[0026]
According to the present invention, it is possible to use an existing speaker as it is, and it is
possible to construct a room acoustic system that easily enhances presence and expression
(claims 1 to 5).
In addition, it is possible to provide a microphone attachment that can be easily attached to an
existing microphone and that captures a user's voice so as to provide voice reproduction with
enhanced presence and expressiveness in a karaoke box (claim 6).
[0027]
It is a schematic explanatory drawing which showed the mode of the room of the karaoke box.
It is the schematic which showed the relationship between a speaker unit, an acoustic reflection
unit, and a wall. It is an enlarged view of an acoustic reflection unit.
It is an explanatory view showing a development of attachment and a situation of wearing.
[0028]
Hereinafter, embodiments of the present invention will be described in detail with reference to
the drawings.
Here, for convenience of explanation, first, the configuration will be described, and then, the
history of the experiment and the examination result of the present invention will be described.
[0029]
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7
In the present embodiment, an example in which the room acoustic system of the present
invention is applied to a karaoke box will be described. FIG. 1 is a schematic explanatory view
showing the room of the karaoke box. FIG. 2 is a schematic view showing the positional
relationship between the speaker unit, the acoustic reflection unit, and the wall. Among these,
FIG. 2 a is a partially enlarged view of the right side surface of the room, and FIG. 2 b is a plan
view of the same portion. FIG. 3 is an enlarged view of the acoustic reflection unit. Among these,
FIG. 3 a is a perspective view seen from the back side, and partially shows the center of a plastic
cardboard, and FIG. 3 b is a side view. In the drawings, for convenience of explanation, the aspect
ratio is not necessarily standardized to be strict.
[0030]
The indoor audio system 1 is formed in a room R, has an acoustic reflection unit 10 and a
speaker unit 20 as its main components, and has a drive system D that allows karaoke to flow
from the speaker, a monitor L that projects an image, and a user There is also a microphone M
used by The drive system D includes a communication unit, an amplifier unit, an equalizer unit,
and the like.
[0031]
Room R has the same configuration as a general karaoke box. That is, the area (floor surface) is
approximately (2.5 m to 6 m) × (2.5 m to 10 m), and the height is 2.2 m to 3.0 m. The walls are
soundproofed.
[0032]
The speaker unit 20 includes a speaker 21, a ceiling attachment 22, and a lead plate 23.
[0033]
The speaker 21 is not particularly limited as long as it can be used in a karaoke box, and a
commercially available one can be used.
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8
Here, a 2-way speaker with a size of 26 cm × 36 cm × 25 cm is used, and the diaphragm has a
configuration of a 20 cmφ woofer and a 5 cmφ tweeter. Each diaphragm is attached to one
surface of a cube-shaped enclosure (enclosure). Hereinafter, this surface is referred to as the
front surface, and the opposite surface is referred to as the back surface.
[0034]
The speakers 21 are attached by being suspended by the ceiling attachment 22 from two places
in the front of the room R on the left and right of the ceiling. The ceiling mount 22 can be fixed
by swinging, and as shown, the speaker 21 is fixed with its surface directed to the wall side on
which the acoustic reflection unit 10 is supported.
[0035]
Further, on the rear surface of the speaker 21, a lead plate 23 having a thickness of 2 mm and
substantially the same area as the rear surface is attached. Since the speaker 21 and the lead
plate 23 are heavy, the attachment of the lead plate 23 to the speaker 21 and the attachment of
the speaker 21 to the ceiling are made strong so as not to be detached or dropped.
[0036]
The acoustic reflection unit 10 includes an acoustic reflection plate 11, a plate support 12, and a
frame 13.
[0037]
The acoustic reflection plate 11 is a plastic corrugated board having an outer shape of 60 cm
long × 90 cm wide × 6 mm thick.
In detail, the hollow prism structure is connected to each other, and two 60 cm × 90 cm × 1
mm thick sheets are separated by 4 mm, and a 4 mm × 60 cm × 1 mm thick core is interposed
at 5 mm intervals between them. It can be said. The material is polycarbonate.
03-05-2019
9
[0038]
The acoustic reflection plate 11 is supported by a lower support while being inclined so as to
face the central portion side of the room R, with the lower central portion held by the plate
support 12 attached to the upper portion of the wall. The acoustic reflection plate 11 is not in
contact with the other members except at one place in the lower side central portion, and is not
in contact with the wall or the ceiling.
[0039]
However, from the viewpoint of design, the acoustic reflection unit 10 is provided with the frame
13 at a position about 2 cm above the acoustic reflection plate 11 so as to make it appear as the
edge of the acoustic reflection plate 11. Specifically, the frame has a rectangular shape with an
edge width of 4 cm and an outer diameter of 63 cm × 93 cm. The frame 13 is also supported by
the plate support 12. In addition, the ceiling attachment stay 131 is provided in the two corners
on the frame 13, and, by this, the frame 13 is attached also to the ceiling.
[0040]
The acoustic reflection unit 10 and the speaker unit 20 are separated by 90 cm.
[0041]
Moreover, in the room acoustic system 1, the attachment 30 which improves a feeling of reality
etc. is penetrated to the existing microphone M, and the karaoke service is provided to the user.
FIG. 4 is an explanatory view showing a developed view of the attachment and how it is attached.
[0042]
As illustrated, the attachment 30 is formed by punching or cutting a sheet of water-resistant
03-05-2019
10
resin material, and is composed of a band 31 and a tongue 32 (FIG. 4a). The band portion 31 has
a gently curved band shape, a width of 1.5 cm, an arc length of 15 cm, and both ends are
semicircles. Moreover, the notch 311 is inserted alternately, and the band part 31 becomes an
annular ring by putting the notch 311 together.
[0043]
The tongue portion 32 is elliptical and has a shape in which the major axis direction is joined to
the band portion 31. When the band 31 is an annular ring, the tongue 32 also forms a curved
surface naturally. The user inserts the microphone M into the annular ring and abuts the sound
collecting portion of the microphone M for use. At this time, the sound collecting portion of the
microphone M is surrounded by the concave curved surface formed by the tongue piece 32 (
Figure 4b).
[0044]
By holding the tongue piece 32 so as to be located on the other side of the microphone M as
viewed from the user, the reflected sound from the tongue piece 32 is also taken into the
microphone M, and the sound collecting property is improved and the presence is achieved
Feeling etc. improve.
[0045]
<Experiment> Next, various experimental results will be described including the study of the
present invention.
The subjects were 5 people and conducted an experiment of listening comparison. However, the
subjects did not inform them of which configuration they were in, and were asked to answer only
by comparing the sounds.
[0046]
<Experiment 1: Examination of the direction of the speaker> An office room of about 15 m <2>
was prepared, and speakers were installed near the ceiling on the left and right of the wall top. At
03-05-2019
11
this time, when the front face of the speaker was installed inside the room (in the normal case)
and when it was directed to the wall side, some people answered that the sound was improved.
[0047]
<Experiment 2: Examination of the presence or absence of a reflecting plate> From Experiment 1,
the possibility of enhancing the acoustic effect by reflection was expected, and an attempt was
made to install a reflecting plate near the wall. As in Experiment 1, comparing the time when the
plastic plate was inserted near the wall with the speaker facing the wall and the time when there
was no plastic plate, it was answered that the sound was better if all the subjects had the plastic
plate did. In particular, it was an opinion that the sound was good when the plastic plate was
facing the center of the room (tilted toward the subject).
[0048]
<Experiment 3: Examination of Material and Type of Reflector> Next, an area of about 40 cm ×
30 cm, 0.5 mm thick plastic plate, 1 mm thick plastic plate, 2 mm thick plastic plate, 5 mm thick
plastic plate, 2 mm thick glass plate, A 3 mm thick glass plate and a 2 mm thick metal plate were
prepared and inserted closer to the wall between the wall and the speaker, and it was tested
which sounds better. As a result, the difference between the materials was not clear, and most of
the opinions were that the thickness was in the range of 1 mm to 2 mm and the sound was good.
[0049]
<Experiment 4: Size of Reflector> Next, an experiment was conducted by changing the size of a
reflector of a plastic plate of 2 mm thickness. A piece of about 40 cm × 30 cm, about 60 cm ×
40 cm, about 90 cm × 60 cm, about 120 cm × 85 cm, about 180 cm × 90 cm was placed near
the wall. The results were as good as about 60 cm × 40 cm, about 90 cm × 60 cm, about 120
cm × 85 cm, and in particular 90 cm × 60 cm.
[0050]
<Experiment 5: Structure of Reflecting Plate> In Experiment 4, when the plastic plate of 2 mm
03-05-2019
12
thickness becomes a certain size, it becomes difficult to maintain the flat posture as it is. In
particular, it is not possible to hold the posture slightly to turn to the center of the room.
Therefore, we decided to consider plastic cardboard from the viewpoint of strength. The size is
90 cm × 60 cm × apparent thickness 6 mm (the thickness of the solid part is 1 mm each), and
the size of the hole is 4 mm × 4 mm × 60 cm plastic cardboard and 90 cm × 60 cm × 2 mm
plastic plate . Then, astonishingly, all the subjects answered that they did not get lost and that the
plastic cardboard clearly sounds better. When asked how it changed, the answer was that the
sense of reality increased and the ability to express sound improved.
[0051]
<Experiment 6: Examination of Plastic Corrugated Cardboard> In order to examine the possibility
of plastic corrugated cardboard, the thickness of the solid part, and the size and area of the hole
were examined. About a hole, if it was not only a square but (3 mm-5 mm) x (3 mm-5 mm), it was
good. In addition, in the hole of 6 mm square or more, many people answered that sound is not
good compared with the case where it is a hole smaller than it. About thickness and area, it is the
same as examination result to it, thickness (of solid part) is 1mm-2mm, width is width = 60cm120cm, width 40cm-85cm of the long side is good The In addition, the direction of the
longitudinal direction of the hole was not particularly different in either the vertical direction or
the horizontal direction.
[0052]
<Experiment 7: Examination of distance between plastic cardboard and speaker> Next, the
distance between the speaker and the plastic cardboard was examined. In a general karaoke box,
the speakers are two-way or three-way type. In any case, the output is substantially determined
by the largest diaphragm (usually woofer), and in a general karaoke box, the diaphragm with the
largest diameter is 11 cm or more and 25 cm or less. Various speakers were prepared, and the
optimum distance was measured. It was found that the distance of approximately 60 cm to 110
cm is preferable in the case of a plastic cardboard having a width of 60 cm to 120 cm and a
length of 40 cm to 85 cm although there was some variation depending on the subject. In
particular, the range of 90 cm ± 10 cm was good. There was no clear correlation between the
distance between the plastic cardboard and the wall.
[0053]
03-05-2019
13
<Experiment 8: Examination of existence of frame> In addition, since it was only supported by
sandwiching the lower side of the exposed plastic cardboard simply in the experiment so far, it is
attached to a wooden frame from a design point of view, and the acoustic effect is again I
confirmed. Then, surprisingly, when the frame was put, the sound quality improvement effect
was almost lost. When this was examined based on it, it turned out that a sound improvement
effect is maintained, so that there are few support locations, ie, the part which interferes with a
plastic corrugated cardboard, is small. In other words, it was confirmed that single point support
or single point support is preferable.
[0054]
<Experiment 9: Installation of lead plate> It is said that the heavier the audio equipment, the
better the sound. Therefore, we attached a lead plate to the back of the speaker and examined
the sound quality improvement effect. As a result, when the lead plate was fixed to the back side
in particular, it was answered that the degree of separation of the sound and the degree of
elongation were improved.
[0055]
<Experiment 10: Examination of Attachment> When the presence or absence of the abovementioned attachment was examined, an answer was obtained that the sound was improved in a
superimposed manner in the presence of the attachment.
[0056]
As described above, according to the present invention, an existing speaker can be used as it is,
and a room acoustic system can be easily constructed to enhance presence and expression.
In addition, it is possible to provide a microphone attachment that can be easily attached to an
existing microphone and that captures the voice of the user so as to provide voice reproduction
with enhanced realism and expressiveness in a karaoke box. In particular, the attachment can be
easily inserted and removed, disposable, and used hygienically. Depending on the mode of use,
advertising may be printed.
03-05-2019
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[0057]
According to the present invention, the sound quality improvement effect can be achieved
successfully. When applied to a karaoke box, you can sing smoothly without making a loud voice.
[0058]
It can also be applied to home theaters and audio rooms.
[0059]
DESCRIPTION OF SYMBOLS 1 indoor acoustic system 10 acoustic reflection unit 11 acoustic
reflection plate 12 plate support 13 frame 20 speaker unit 21 speaker 22 ceiling attachment 23
lead plate 30 attachment 31 band portion 32 tongue piece 131 ceiling attachment stay D drive
system L monitor M Mike R room
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