close

Вход

Забыли?

вход по аккаунту

?

JP2018139385

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2018139385
Abstract: The present invention supports generation of natural reverberation effects regardless of
listening places without using a large-scale speaker system. SOLUTION: A reverberation
supporting device 1 has a plate-like sound emitting member which has a cavity inside and has a
curved portion at least in part, and an excitation which excites the sound emitting member based
on an input acoustic signal. And the Moreover, you may further have the supporting member
which connects the said sound emission member and the said vibrator. Also, the cavity may be
divided into a plurality of resonant tubes, and the resonant tubes may have different frequency
characteristics. [Selected figure] Figure 1
Reverberation support device
[0001]
The present invention relates to a reverberation support device that supports generation of
natural reverberation effects.
[0002]
Conventionally, as a system that supports the generation of natural reverberation effects (reverb
effects etc.), a sound field support system AFC (Active Field Control) that supports natural
resonance using feedback loops based on the sound of the space itself )It has been known.
However, it is necessary to install a large-scale speaker system including a plurality of
12-05-2019
1
microphones and a device that performs audio signal processing and the like, and there is a
problem that the installation cost is high.
[0003]
On the other hand, there is known an excitation apparatus which provides an actuator on an
instrument or a panel and generates rich sound on the instrument or the panel by excitation by
the actuator. Because the sound is emitted from the entire sound emission surface of the
instrument or the panel, it is possible to feel the spread of natural sounds. By using this
excitation apparatus, it is possible to easily support the generation of natural reverberation
effects without using a large-scale speaker system.
[0004]
For example, Patent Document 1 describes a vibrating device that vibrates a resonance drum of a
stringed instrument by a vibrator (actuator) to generate rich sound. In this vibrating device, the
string vibration converted into an electrical signal is transmitted to an actuator installed inside
the back plate of the guitar or the like. The actuator converts the electrical signal into vibration
and transmits it to the guitar body. It is possible to emit reverberation on the guitar without
connecting amps and speakers.
[0005]
JP, 2016-045316, A
[0006]
In the above-mentioned conventional excitation device, sound is emitted by vibrating the sound
emission surface of the musical instrument or the panel.
However, since the sound emission surface is flat, sound is strongly emitted in the normal
direction of the sound emission surface, and depending on the listening location, a reverberation
effect may not be obtained sufficiently.
12-05-2019
2
[0007]
The present invention has been made in view of the above circumstances, and it is an object of
the present invention to provide a reverberation assisting apparatus capable of supporting
generation of natural reverberation effects regardless of a listening place without using a largescale speaker system. I assume.
[0008]
In order to solve the above-mentioned subject, this invention proposes the following means.
A reverberation assisting apparatus according to the present invention includes a plate-shaped
sound emitting member having a cavity inside and having a curved portion at least in part, and a
vibrator for vibrating the sound emitting member based on an input acoustic signal. And
[0009]
According to the present invention, it is possible to provide a reverberation assisting apparatus
capable of assisting generation of a natural reverberation effect regardless of a listening place
without using a large-scale speaker system.
[0010]
It is a figure which shows the whole structure of the reverberation assistance apparatus which
concerns on 1st embodiment of this invention.
It is a figure which shows the whole structure of the modification of the same reverberation
assistance apparatus. It is a figure which shows the whole structure of the modification of the
same reverberation assistance apparatus. It is a figure which shows the whole structure of the
modification of the same reverberation assistance apparatus. It is a figure which shows the whole
structure of the reverberation assistance apparatus which concerns on 2nd embodiment of this
invention.
[0011]
12-05-2019
3
First Embodiment Hereinafter, a first embodiment of a reverberation assisting apparatus
according to the present invention will be described with reference to FIGS. 1 to 4. In addition, in
order to make a drawing legible, the ratio of the thickness of each component and a dimension is
adjusted suitably. FIG. 1 is a diagram showing an overall configuration of a reverberation
assisting apparatus 1 according to the present embodiment. As shown in FIG. 1, the
reverberation supporting device 1 according to the present embodiment includes a sound
emitting panel (sound emitting member) 2 and an actuator (vibrator) 3.
[0012]
The sound emission panel 2 is a panel having therein a cavity functioning as a sound resonance
tube. As shown in FIG. 1, the sound output panel 2 is formed by curving the surface 2 a and the
back surface 2 b of the plate-like panels facing the thickness direction. That is, in the present
embodiment, the entire convex surface 2 a and the entire concave back surface 2 b of the sound
output panel 2 are the curved portions of the sound output panel 2. The surface 2a of the sound
emission panel 2 of the present embodiment has a curved surface shape in which a part of the
surface of a sphere or an ellipsoid is cut out.
[0013]
The hollow inside the sound emitting panel 2 may be in communication with the outside through
an opening formed in the sound emitting panel 2. The resonance frequency of the sound
emission panel 2 can be changed by adjusting the shape and the inner volume of the cavity, the
area of the opening, and the like.
[0014]
The actuator 3 outputs a vibration based on the supplied acoustic signal. The actuator 3 is
provided to abut on the back surface 2 b of the sound emission panel 2 as shown in FIG. 1. A
plurality of actuators 3 may be provided.
[0015]
12-05-2019
4
An acoustic signal is supplied to the actuator 3 from the outside via the connected electrical
signal line. The actuator 3 generates a drive signal based on the supplied acoustic signal, and
vibrates the back surface 2 b of the sound emission panel 2.
[0016]
The actuator 3 generates a vibration using a member that vibrates acoustically, for example, a
voice coil or a piezoelectric element. The generated vibration is transmitted to the back surface
2b of the sound emitting panel 2 in contact.
[0017]
The actuator 3 vibrates the back surface 2 b of the sound emission panel 2 to vibrate the entire
sound emission panel 2. As a result, the sound is emitted with the front surface 2a and the back
surface 2b of the sound emission panel 2 as the sound emission surface.
[0018]
The sound emitted from the sound emission panel 2 is emitted from the entire sound emission
surface, so that natural sound spread can be felt as compared with a normal speaker in which the
sound emission source of the sound is easily specified. Further, since the surface 2a of the sound
emitting panel 2 which is the main sound emitting surface is curved in a convex shape, the sound
is diffused and emitted in a wide direction. The sound can be emitted more extensively compared
to a non-curved sound emission panel, and the sound image perceived by the listener is more
blurred. As a result, a natural reverberation effect can be generated regardless of the listening
location.
[0019]
The reverberation supporting device 1 is disposed with the surface 2a, which is the main sound
emitting surface, facing the listener. The actuator 3 is provided on the back surface 2 b of the
12-05-2019
5
sound emission panel 2, so it is difficult for the listener to see it. Therefore, the overall
appearance of the reverberation assisting apparatus 1 is good.
[0020]
In addition, the actuator 3 may be provided in locations other than the back surface 2b of the
sound emission panel 2, for example, the surface 2a. However, in consideration of the
appearance of the entire reverberation assisting apparatus 1, it is preferable that the
reverberation assisting apparatus 1 be provided on the back surface 2 b of the sound emitting
panel 2.
[0021]
In the reverberation support device 1 of the present embodiment configured as described above,
the surface 2 a of the sound emission panel 2, which is the main sound emission surface of the
sound emission panel 2 where the sound emission source of the sound is difficult to identify, is
curved in a convex shape Sound is diffused in a wide direction and emitted. Therefore, the
reverberation assisting apparatus 1 can support generation of natural reverberation effects
regardless of the listening place without using a large-scale speaker system.
[0022]
Although the first embodiment of the present invention has been described in detail with
reference to the drawings, the specific configuration is not limited to this embodiment, and
design changes can be made without departing from the scope of the present invention. Etc. are
also included. Moreover, it is possible to combine and comprise the component shown in the
above-mentioned 1st embodiment and modification suitably.
[0023]
The shape of the sound emission panel 2 is not limited to the curved shape as shown in FIG. For
example, as shown in FIG. 2, a reverberation assisting apparatus 1A, which is a modification of
the reverberation assisting apparatus 1, has a sound emission panel 2A in which the front
12-05-2019
6
surface 2a and the back surface 2b do not bend in the vertical direction but bend only in the
horizontal direction Prepare. The sound emission panel 2A can emit sound in a range of
approximately 360 degrees with respect to the horizontal direction.
[0024]
The sound output panel may have a cylindrical shape (cylindrical shape), but the sound output
panel 2A has a shape in which a part of the cylindrical shape in the circumferential direction is
cut in the vertical direction as shown in FIG. There is. When the sound output panel is cylindrical,
the rigidity of the sound output panel is increased, and it becomes difficult to generate vibrations.
Further, as the rigidity of the sound emitting panel is improved, the resonance frequency of the
sound emitting panel is increased, and the frequency characteristic having the resonance point in
the high sound range is obtained. Since these phenomena are not preferable as a sound emission
panel, for example, it is preferable to cut out a part of a cylindrical shape like the sound emission
panel 2A to reduce the rigidity of the sound emission panel.
[0025]
The material and thickness of the back surface 2b may be adjusted so that the rigidity of the
back surface 2b is lower than the rigidity of the front surface 2a which is the main sound
emission surface of the sound emission panel 2A. In the case of a shape such as the sound
emission panel 2A, the surface 2a may be positively vibrated to emit sound, and the necessity to
emit sound also from the back surface 2b is not so high.
[0026]
Further, as shown in FIG. 3, a reverberation assisting apparatus 1B, which is a modified example
of the reverberation assisting apparatus 1, does not have a constant radius of curvature, but a
sound emission panel 2B in which the front surface 2a and the back surface 2b are curved with
different radii Prepare. By forming a portion where the radius of curvature is smaller than that of
the other portion of the sound emission panel 2A, the sound can be emitted more broadly.
[0027]
12-05-2019
7
Although the sound emission panel 2A and the sound emission panel 2B which are the
modification of the sound emission panel 2 are the shape which curved the flat panel, the
modification of the shape of the sound emission panel is not limited to these. For example, only
the front surface 2a may be convexly curved, and the back surface 2b may not be curved.
Further, only a part of the surface 2a, for example, only the central part may be curved in a
convex shape. Two or more points of the surface 2a may be convexly curved. That is, at least a
part of the sound emission panel may have a curved portion.
[0028]
Further, as shown in FIG. 4, a reverberation assisting apparatus 1 </ b> C, which is a modification
of the reverberation assisting apparatus 1, further includes a support member 4. The support
member 4 connects the large-sized actuator 3A and the sound output panel 2A in three places.
The large-sized actuator 3A is provided on the back surface 2b side of the sound emission panel
2A. The actuator 3A larger than the actuator 3 excites the sound emission panel 2A via the
support member 4. That is, the vibration generated in the large-sized actuator 3A is transmitted
to the support member 4 connected to the large-sized actuator 3A, and further reaches the sound
output panel 2A to excite the sound output panel 2A. By further providing the support member
4, the sound output panel 2A can support a larger actuator 3A. The large-sized actuator 3A can
excite larger vibration than the actuator 3, and the reverberation assisting apparatus 1C can emit
a larger sound. Here, in order to increase the efficiency of transmitting the vibration of the largesized actuator 3A to the sound output panel 2A, the support member 4 is made of wood such as
walnut or maple, resin (organic material) such as plastic, metal, ceramics, etc. Preferably, the
material or structure is high in rigidity.
[0029]
It is preferable to provide the support member 4 and the large-sized actuator 3A on the back
surface 2b of the sound output panel 2A. In addition to the effect of improving the overall
appearance of the reverberation support device 1C, the large-sized actuator 3A can be stably
supported. This is because the actuator 3A is supported by the three support members 4 so that
the position of the center of gravity of the reverberation support device 1C and the position of
the actuator 3A substantially coincide with each other at the inner center of the cylindrical sound
emission panel 2A.
12-05-2019
8
[0030]
Here, from the viewpoint of preventing occurrence of abnormal vibration such as rolling, as
shown in FIG. 4, the three support members 4 are arranged so that the intervals between the
connection portions with the sound emission panel 2A become equal. Preferably, it is arranged
with respect to As shown in FIG. 4, the three support members 4 are arranged horizontally along
the back surface 2b of the sound emission panel 2A, and are disposed at the left end, center and
right end of the back surface 2b of the sound emission panel 2A There is. The distance between
the left end portion and the two support members 4 disposed at the center and the connection
portion with the sound emission panel 2A is the distance between the right end portion and the
two support members 4 disposed at the center and the connection portion with the sound
emission panel 2A The vibration of the actuator 3A can be more uniformly transmitted to the
entire support member 4 as long as Of course, the number of support members may be plural
other than three. Even in such a case, it is preferable that the plurality of support members be
uniformly disposed relative to the sound emission panel 2A.
[0031]
Second Embodiment Next, a second embodiment of the present invention will be described with
reference to FIG. In the following description, the same reference numerals are given to the same
configuration and the like as those described above, and the redundant description will be
omitted.
[0032]
FIG. 5 is a diagram showing an overall configuration of the reverberation assisting apparatus 10
according to the present embodiment. As shown in FIG. 5, the reverberation supporting device
10 according to the present embodiment includes a sound emitting panel 20 and an actuator 3.
[0033]
The sound emission panel 20 has a cavity inside similarly to the sound emission panel 2. The
internal cavity is divided into a plurality of regions by a cylindrical resonance tube 50. The
plurality of resonance tubes 50 may have the same shape or different shapes. Further, the
12-05-2019
9
resonance tube 50 may not have a cylindrical shape, and may have a shape that functions as a
resonance tube.
[0034]
The resonance tube 50 has a structure in which the air inside is easily vibrated and the mode
vibration is easily generated, and has a specific resonance frequency corresponding to the length
of the resonance tube 50. The resonance tube 50 may have an opening at its side or the like.
When it has an opening, the resonance frequency of the resonance tube 50 can be changed by
adjusting the position, the area, etc. of the opening.
[0035]
The plurality of resonance tubes 50 may be adjusted to have different resonance frequencies. By
arranging a plurality of resonance tubes 50 having different frequency characteristics side by
side, it is possible to improve the frequency balance of the resonance. For example, if the
volumes and shapes of the plurality of resonance tubes 50 are different from each other, their
resonance frequencies are different from each other. Also, if sound absorbing members such as
sponges are placed at various positions in the cavity inside the plurality of resonance tubes 50,
their resonance frequencies are different from each other. As described above, when the
resonance tube 50 has an opening, if the position and the area of the opening of the resonance
tube 50 are different from each other, their resonance frequencies are different from each other.
The plurality of resonance tubes 50 may be adjusted to have at least a portion of different
resonance frequencies. Even if only some of the resonance tubes 50 have different resonance
frequencies, the frequency balance of the sound can be improved. The sound emission panel 20
provided with the plurality of resonance tubes 50 adjusted in this manner can reduce variation in
the frequency characteristics of the reverberation sound as compared with the sound emission
panel 2 having one cavity inside.
[0036]
According to the reverberation supporting device 10 of the present embodiment, the same effect
as that of the first embodiment can be obtained. Since the sound emitted from the sound
emission panel 20 is emitted from the entire sound emission surface, natural sound spread can
be felt as compared with a normal speaker in which the sound emission source of the sound is
12-05-2019
10
easily specified. Moreover, since the surface 2a of the sound emitting panel 20 which is the main
sound emitting surface is curved in a convex shape, the sound is diffused and emitted in a wide
direction. Compared to the non-curved sound emission panel, the sound can be emitted more
widely and the sound image perceived by the listener is more blurred. As a result, it is possible to
further enhance the natural reverberation effect regardless of the listening place. Furthermore,
the sound output panel 20 has a plurality of resonance tubes 50, so that the variation of the
frequency characteristics of the reverberation can be reduced. Therefore, the natural
reverberation effect can be further enhanced.
[0037]
The second embodiment of the present invention has been described in detail with reference to
the drawings, but the specific configuration is not limited to this embodiment, and design
changes and the like within the scope of the present invention are also included. . Moreover, it is
possible to combine and comprise the component shown in the above-mentioned 2nd
embodiment and modification suitably.
[0038]
1, 1A, 1B, 1C, 1D, 10: reverberation supporting device, 2, 2A, 2B, 20: sound emitting panel
(sound emitting member), 3, 3A: actuator (excitation device); 4: supporting member; 50 ...
Resonant tube
12-05-2019
11
Документ
Категория
Без категории
Просмотров
0
Размер файла
20 Кб
Теги
jp2018139385
1/--страниц
Пожаловаться на содержимое документа