JP2698315B2 - Wide frequency band reverberation variable device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wide frequency band reverberation variable device, and more particularly to a wide frequency band reverberation variable device capable of varying reverberation from a low frequency range to a high frequency range.

[0002]

2. Description of the Related Art Generally, in a music hall or the like where an orchestra or the like is performed, a person who has a certain amount of reverberation sound,
Good feeling is obtained with lingering sound.

[0003] In an opera hall or the like, the presence of reverberation makes it impossible to hear the voice clearly, so it is necessary to suppress the reverberation.

Further, in a lecture hall or the like, the presence of reverberation makes it impossible to hear the voice as compared with the case of the opera hall, so it is necessary to further suppress the reverberation.

[0005] Therefore, conventionally, a sound absorbing device is mounted on a ceiling, a wall, a floor, or the like so that reverberation sound according to the purpose of each hall or the like is obtained.

For example, a plurality of small columnar sound absorbers are suspended from the ceiling surface so as to be able to move up and down, and the reverberation sound is made variable by raising and lowering the sound absorbers.

[0007]

In the case where the reverberation sound is made variable by using the plurality of small columnar sound absorbers described above,
Since the sound is absorbed only by the small columnar sound absorber, the reverberation in the middle and high ranges is mainly variable, and only the small columnar sound absorber resonates in the low range such as human speech. It was difficult to make the sound variable.

In particular, in a multipurpose hall or the like, it is necessary to make reverberation sound variable in a wide range from a low range to a high range. There is a problem that it is not possible to sufficiently cope with a variable reverberation in a wide range.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object the purpose of making it possible to vary reverberation in a wide range from a low range to a high range, such as a multipurpose hall. An object of the present invention is to provide a frequency band reverberation variable device.

[0010]

According to a first aspect of the present invention, there is provided a sound absorbing plate which is provided on a back side of a surface plate in a direction perpendicular to the surface plate and at a predetermined interval in parallel with the sound absorbing plate. ,
An opening formed in the surface plate and guiding the sound behind the surface plate, wherein the opening includes opening and closing means for opening and closing the opening to change reverberation.

A second invention is characterized in that the opening / closing means makes the opening area of the opening variable.

According to a third aspect of the present invention, the opening / closing means has a cylindrical sound absorbing material integrally accommodated in the opening on the back side of the opening / closing lid, and allows the cylindrical sound absorbing material to enter and exit from the opening. It is characterized by opening and closing.

A fourth aspect of the present invention is characterized in that the opening / closing means includes an opening / closing lid that slides parallel to the surface plate to change the opening area.

According to a fifth aspect of the present invention, there is provided a wind-up shutter, and a plurality of sound-absorbing plates disposed on the back side of the wind-up shutter and arranged in parallel with the shutter at predetermined intervals. It is characterized in that the opening range is made variable by the winding type shutter.

According to a sixth aspect of the present invention, there is provided a revolving door-shaped opening / closing body, and a sound absorbing plate provided on a back side of the opening / closing body, a plurality of sound absorbing plates being arranged perpendicularly to the opening / closing body and at a predetermined interval in parallel with each other. The opening range is made variable by an opening / closing body.

A seventh aspect of the present invention is characterized in that the opening / closing body has a sound absorbing material integrally on the back side, and the sound absorbing material is located on the front side when the opening / closing body is opened.

According to an eighth aspect of the present invention, a front plate, a shutter or an opening and closing body, and a back side of the surface plate, the shutter or the opening and closing body are provided.
It is characterized in that the surface plate, the shutter or the opening / closing body, and a plurality of sound absorbing plates arranged in parallel with each other at predetermined intervals are formed as a unit having a predetermined area.

[0018]

According to the first aspect of the present invention, an opening formed in the surface plate is opened, and sound is guided to the back side of the surface plate, so that the back surface of the surface plate is perpendicular to the surface plate and at a predetermined interval. A plurality of sound absorbing plates arranged in parallel can absorb sound in a wide range of low, middle, and high ranges, and can vary reverberation over a wide range.

In particular, the present invention is suitable for use in a multipurpose hall where low-range sound absorption is possible and reverberation from the low-range to the high-range range is required.

In the second invention, in addition to the state of the first invention, the opening area of the opening is made variable by the opening / closing means, thereby changing the sound absorption coefficient and making the reverberation sound variable. It is possible to do.

According to a third aspect of the present invention, in addition to the first aspect, the opening / closing means has a cylindrical sound absorbing material which can be housed in the opening behind the opening / closing lid. By opening and closing the opening by letting the cylindrical sound absorbing material in and out of the opening, the cylindrical sound absorbing material increases the sound absorption coefficient in the middle and treble range, makes the cylindrical sound absorbing material protrude from the opening, and closes the opening. Can absorb sound only in the middle and high frequencies,
Further, it is possible to absorb sound in a low frequency range with the opening being opened.

In the fourth invention, in addition to the state of the second invention, the opening / closing means is formed by an opening / closing lid which slides in parallel with the surface plate to make the opening area variable. The opening area can be easily made variable, and by making this opening area variable, the sound absorption coefficient can be changed and the reverberation sound can be made variable.

According to a fifth aspect of the present invention, a wind-up type shutter is provided, and a plurality of sound absorbing plates are provided on the rear side of the wind-up type shutter at a predetermined interval in parallel with the shutter. By making the aperture range variable with the shutter, it is possible to make the sound absorption coefficient variable and make it possible to make the reverberation sound variable over a wide range from the low range to the high range.

According to a sixth aspect of the present invention, there is provided a rotating door-like opening / closing body, and a plurality of sound-absorbing plates disposed on a back side of the opening / closing body in a direction perpendicular to the opening / closing body and at predetermined intervals in parallel with each other. By making the opening range variable, it is possible to make the sound absorption coefficient variable and to make the reverberation sound variable over a wide range from the low range to the high range.

In the seventh invention, in addition to the state of the sixth invention, a sound absorbing material is integrally provided on the back side of the opening and closing body, and the sound absorbing material is located on the front side when the opening and closing body is opened. In addition, the sound absorbing material of the opening / closing body can increase the sound absorption coefficient in the middle and high frequency ranges, and increase the variable efficiency of reverberation.

According to an eighth aspect of the present invention, in addition to the first to seventh aspects, the rear side of the surface plate, the shutter or the opening / closing body is provided perpendicularly to the surface plate, the shutter or the opening / closing body and at a predetermined position. By forming the unit as a unit having a predetermined area in which a plurality of sound absorbing plates are arranged in parallel at intervals, it is possible to easily and quickly construct a hole or the like.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 to 4 show a wide-frequency band reverberation varying apparatus according to an embodiment of the present invention.

The wide frequency band reverberation variator 10 in this embodiment is mounted on a ceiling 12 and has a surface plate 1.
4, a sound absorbing plate 16, and an opening / closing lid 18 as opening / closing means
And a sound absorbing material 20.

The surface plate 14 forms a ceiling surface.
It is disposed below the ceiling slab 22 at a predetermined distance from the ceiling slab 22, and a predetermined space is formed between the ceiling slab 22 and the ceiling slab 22. On this surface plate 14,
A plurality of circular openings 24 are formed at regular intervals.
The diameter of the opening 24 is set, for example, to about 150 mm, and the pitch between the openings 24 is, for example, 300 mm.
Set to about.

The sound absorbing plate 16 is formed in a substantially rectangular shape as shown in FIG. 4, and is formed by attaching glass wool 28 to both surfaces of an intermediate plate 26 made of plywood. This sound absorbing plate 16 is provided on the back of the front plate 14, perpendicular to the front plate 14,
Also, a plurality of them are arranged in parallel at predetermined intervals. For example,
The interval between the sound absorbing plates 16 is set to about 300 mm to 450 mm, and the sound absorbing plates 16 are installed between the openings 24 of the surface plate 14. The height of the sound absorbing plate 16 is 450 mm.
About 900mm, the thickness of the glass wool 28 is 25mm
Set to about.

As described above, the sound guided from the opening of the surface plate 14 to the back side of the surface plate 14 is absorbed by the glass wool 28 of the sound absorbing plate 16 in the middle and high frequency range.
By arranging the plurality 6 in a direction perpendicular to the surface plate 14 and in parallel with a predetermined interval, a low-frequency sound having a long wavelength is absorbed, and a wide range of sound absorption from a low-frequency range to a high-frequency range is possible. Become.

The opening / closing lid 18 as opening / closing means is a disk shaped slightly larger than the opening 24 of the surface plate 14 as shown in FIG. 2, and as shown in FIG. The wire 30 is connected to a lifting / lowering motor 34 via a lifting / lowering jig 32, and is moved up and down by the motor 34 to open and close the opening 24.

The sound absorbing material 20 as opening / closing means has a cylindrical shape having an outer diameter substantially coinciding with the opening 24, is integrally attached to the back surface of the opening / closing cover 18, and moves up and down together with the opening / closing cover 18 to open and close. When the opening 24 of the lid 18 is closed, the lid 18 is stored on the back side of the surface plate 14 from the opening 24. When the sound absorbing material 20 is fully opened (at the lowest position), the upper end surface of the sound absorbing material 20 is, for example, 1 mm.
It is set to be at a position of about 50 mm. The sound absorbing material 20 is formed of, for example, glass wool having a thickness of about 25 mm. Also, the sound absorbing material 20
As shown in FIG. 3, a plurality of, for example, three guide bars 36 extending vertically are attached to the outer periphery of the sound absorbing material 20 so that the sound absorbing material 20 can be housed in the opening 24. Is inserted into the opening 24 at the lowermost position.

As described above, the sound absorbing material 2 is integrated with the opening / closing lid 18.
0, the sound absorbing material 20 allows
High-frequency sound absorption can be performed, and as a result, the sound absorbing material 20 is
When the sound absorbing plate 16 is protruded from the surface plate 14 in a closed state, sound can be absorbed only in the middle and treble ranges. In addition to the sound absorption of
High-range sound absorption can be performed, and therefore, the sound absorption rate in the middle and high ranges can be increased, and the reverberation can be changed over a wide range.

Next, the state of the sound absorption coefficient in this embodiment will be described.

First, when the opening 24 is fully closed, 63H
The sound absorption coefficient in the low frequency range of z and 125 Hz is 0.1, respectively.
And 0.2, the sound absorption coefficient when the opening is fully opened is
The values are 0.3 and 0.6, respectively, and the sound absorption coefficient is clearly higher in the low frequency range.

Also, in the middle and high range, when the opening 24 is fully closed, the sound absorption coefficients at 250 Hz and 500 Hz are as follows.
While the values are 0.7 and 1.2, respectively, the sound absorption coefficients when the opening is fully opened are 1.0 and 1.6, which are clearly higher.

FIGS. 5 and 6 show a wide frequency band reverberation variable apparatus according to another embodiment of the present invention.

The wide frequency band reverberation variable device 4 of this embodiment
0 is, for example, attached to the wall surface 42,
A rotating door-like opening / closing body 46 is attached so as to be rotatable around the center of the frame 4, and an iron plate 50 lined with a gypsum board 48 is attached to one side from the center of the frame body 44, and to the other side. A glass wool 54 is provided on the back side of the perforated iron plate 52.

The opening / closing member 46 is positioned on the side of the perforated iron plate 52 and the glass wool 5
8 and an expanded metal 60 on the back side.

A concave portion 62 is formed in the wall surface 42 on the side of the perforated iron plate 52, and a plurality of the sound absorbing plates 1 are provided in the concave portion 62 in a direction perpendicular to the opening / closing body 46 and at predetermined intervals in parallel.
6 are provided.

Accordingly, when the opening / closing member 46 is closed on the side of the concave portion 62, the iron plates 50 and 56 serve as reflection surfaces, and the opening / closing member 46 is closed.
In the state where the concave portion 62 is opened, the glass wool 54 absorbs the sound in the middle / high range, and the sound passing through the glass wool 54 is absorbed by the sound absorbing plate 16 from the low range to the high range. Sound absorption is ensured.

When the opening / closing member 46 is fully opened, the glass wool 58 of the opening / closing member 46 is fully opened.
Since sound absorption in the high-frequency range is performed, the sound absorption rate is further increased. Since the directionality of the sound changes depending on the angle of the opening / closing body 46, it is possible to make the reverberation sound variable depending on the angle.

FIGS. 7 and 8 show a wide frequency band reverberation variable apparatus according to still another embodiment of the present invention.

In the wide-band reverberation varying apparatus 70 of this embodiment, a take-up type shutter 74 is mounted on the front surface of a box 72, and a plurality of parallel shutters 74 are provided on the back side of the shutter 74 at a predetermined interval in a direction perpendicular to the shutter 74. Sound absorbing plate 1
6 is provided, and by adjusting the opening of the shutter 74, it is possible to adjust a wide range of reverberation sound from the low range to the high range by the sound absorbing plate 16.

As shown in FIG. 8, a vibration isolating rubber 76 and a rock wool 78 are attached to the shutter 74 to prevent chattering noise of the shutter 74 due to resonance.

Further, the shutter 74, the box 72 and the sound absorbing plate 16 are formed in advance as a unit.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention.

For example, a reverberant sound can be made variable by providing a lid sliding in parallel with the surface plate or a diaphragm-shaped lid at the opening of the surface plate and making the opening area of the opening variable. It is.

Further, it is also possible to provide a lid for simply opening and closing the opening at the opening of the surface plate so that the reverberation sound when the opening is closed and when the opening is opened can be changed.

Further, if the surface plate, the opening / closing body, and the sound absorbing plate are integrally formed in advance to form a unit, the construction can be facilitated and can be performed in a short time.

Further, the sound absorbing plates arranged in parallel with each other are
By alternately arranging them at right angles, it is also possible to obtain a sound absorption coefficient corresponding to various halls and the like, especially when the unit is previously unitized as described above, it is necessary to change the direction of the unit. Thus, the direction of the sound absorbing plate can be easily changed.

[0054]

As described above, according to the first aspect of the invention, the opening formed in the surface plate is opened, and the sound is guided to the back side of the surface plate. Vertically and with a plurality of sound absorbing plates arranged in parallel at predetermined intervals, it is possible to absorb sound in a wide range of low range, middle range and high range, and it is possible to vary reverberation over a wide range. effective.

In particular, there is an effect that it is possible to absorb sound in a low frequency range and to be optimal for use in a multipurpose hall in which reverberation from the low frequency range to the high frequency range needs to be varied.

In the second invention, in addition to the state of the first invention, the opening area of the opening is made variable by the opening / closing means, so that the sound absorption coefficient is changed and the reverberation sound is made variable. There is an effect that can be.

According to a third aspect of the present invention, in addition to the state of the first aspect, the opening / closing means has a cylindrical sound absorbing material which can be housed in the opening on the back side of the opening / closing lid. By opening and closing the opening by letting the cylindrical sound absorbing material in and out of the opening, the cylindrical sound absorbing material increases the sound absorption coefficient in the middle and treble range, makes the cylindrical sound absorbing material protrude from the opening, and closes the opening. Can absorb sound only in the middle and high frequencies,
Further, there is an effect that sound can be absorbed in a low-frequency range with the opening opened.

According to the fourth invention, in addition to the state of the second invention, the opening / closing means is formed by an opening / closing lid which slides in parallel with the surface plate to change the opening area. The opening area can be easily changed, and by making the opening area variable, there is an effect that the sound absorption coefficient can be changed and the reverberation sound can be changed.

According to a fifth aspect of the present invention, a wind-up type shutter and a plurality of sound-absorbing plates provided on the back side of the wind-up type shutter at a predetermined interval in parallel with the shutter are provided. By making the aperture range variable with the shutter, the sound absorption coefficient can be made variable, and the reverberation sound can be made variable over a wide range from the low range to the high range.

According to a sixth aspect of the present invention, there is provided a rotating door-like opening / closing body, and a plurality of sound-absorbing plates disposed on a back side of the opening / closing body in a direction perpendicular to the opening / closing body and at a predetermined interval in parallel with each other. By making the opening range variable, it is possible to make the sound absorption coefficient variable and make it possible to make the reverberation sound in a wide range from the bass range to the treble range variable.

According to the seventh invention, in addition to the state of the sixth invention, a sound absorbing material is integrally provided on the back side of the opening / closing body, and the sound absorbing material is located on the front side when the opening / closing body is opened. In addition, the sound absorbing material of the opening / closing body has the effect of increasing the sound absorption coefficient in the middle and high frequency ranges and increasing the variable efficiency of reverberation.

According to an eighth aspect of the present invention, in addition to the first to seventh aspects, the rear side of the surface plate, the shutter or the opening / closing body is provided perpendicularly to the surface plate, the shutter or the opening / closing body and at a predetermined position. By forming the unit as a unit having a predetermined area in which a plurality of sound absorbing plates are arranged in parallel at intervals, there is an effect that construction in a hall or the like can be performed easily and in a short time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a wide frequency band reverberation variable device according to an embodiment of the present invention is mounted on a ceiling.

FIG. 2 is a cross-sectional view of the wide frequency band reverberation variable device of FIG.

FIG. 3 is a perspective view showing a state of an opening / closing lid and a sound absorbing material of FIGS. 1 and 2;

FIG. 4 is a perspective view showing a state of the sound absorbing plate of FIGS. 1 and 2;

FIG. 5 is a perspective view showing a state in which a wide frequency band reverberation variable device having a revolving door-like opening / closing body according to another embodiment of the present invention is mounted on a wall surface.

FIG. 6 is a cross-sectional view of the wide frequency band reverberation variable device of FIG. 5;

FIG. 7 is a cross-sectional view showing a state in which a wide frequency band reverberation variable device having a rewind type shutter according to still another embodiment of the present invention is mounted on a wall surface.

8 is a partially enlarged sectional view of the shutter of FIG.

[Explanation of symbols]

 10, 40, 70 Wide frequency band reverberation variable device 14 Surface plate 16 Sound absorbing plate 18 Opening / closing lid 20 Sound absorbing material 24 Opening 28 Glass wool 46 Opening / closing body 58 Glass wool 74 Shutter

Claims (8)

(57) [Claims] Claims: 1. On the back side of a face plate, perpendicular to the face plate,
And a plurality of sound absorbing plates arranged in parallel at predetermined intervals; and an opening formed in the top plate and guiding sound to the back side of the top plate, wherein the opening is opened and closed to vary reverberation. A wide frequency band reverberation variable device comprising an opening and closing means. 2. The wide-frequency band reverberation variable apparatus according to claim 1, wherein the opening / closing means changes an opening area of the opening. 3. The opening / closing means according to claim 1, wherein the opening / closing means integrally has a cylindrical sound absorbing material which can be housed in the opening on the back side of the opening / closing lid, and allows the cylindrical sound absorbing material to enter / exit from the opening. A wide frequency band reverberation variable device characterized by opening and closing an opening. 4. The wide frequency band reverberation variable apparatus according to claim 2, wherein the opening / closing means includes an opening / closing lid that slides in parallel with the surface plate to change an opening area. 5. A wind-up type shutter, and a plurality of sound absorbing plates provided on a back side of the wind-up type shutter and arranged in parallel with the shutter at predetermined intervals in parallel with each other. A wide frequency band reverberation variable device, wherein an aperture range is made variable by a shutter. 6. A rotating door-like opening / closing body, and a plurality of sound-absorbing plates provided on a back side of the opening / closing body and arranged perpendicularly to the opening / closing body and at a predetermined interval in parallel with each other. A wide frequency band reverberation variable device characterized by making an aperture range variable. 7. The wide frequency band reverberation variable device according to claim 6, wherein the opening / closing body has a sound absorbing material integrally on the back side, and the sound absorbing material is located on the front side when the opening / closing body is opened. . 8. The surface plate, a shutter or an opening and closing body according to claim 1, wherein a surface plate is provided on the back side of the surface plate, the shutter or the opening and closing body.
A wide-frequency band reverberation variable device, comprising: a shutter or an opening / closing body and a plurality of sound absorbing plates disposed in parallel with each other at a predetermined interval in parallel with each other.