JPH08170381A - Sound-absorbing material and anechoic room - Google Patents

Abstract

PURPOSE: To prevent booming by placing sound-adsorbing members formed by coating chamber members having a large number of small holes with porous absorbing material in four corners of a relatively small chamber such as sound recording chamber, etc., and connecting one end to a duct to make air inlet and outlet. CONSTITUTION: Each of chamber members 2 is formed of punching metal, etc., in the shape of a cylinder, the outside or inside thereof is coated with a porous sound- absorbing material 3 formed of glass wool, rock wool urethane foam, etc., at the same time, a notch section 3a is provided on a vertical middle part of the sound- absorbing material, and sound-absorbing members are formed. The sound-absorbing members 1 are arranged in four corners of a small chamber such as music training room, etc., in the opposite direction on a diagonal line and, at the same time, air inlet ducts 8 are connected to one pair, and air outlet ducts 9 are connected to the other pair. Air inlet and outlet is made from the notch section 3a of each of the sound-absorbing members 1, air inlet and outlet in a room can be equally made, at the same time, sound in low compass is favorably absorbed, and beside mechanical sound in the duct is also absorbed. By the constitution, efficiency of ventilation is promoted and, at the same time, booming caused by resonance can be effectively prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorber installed in a relatively small room such as a listening room, a music practice room, and a recording studio as a measure against booming, and an acoustic room using the sound absorber.

[0002]

2. Description of the Related Art In a listening room, etc.
Due to the resonance that occurs between the wall surfaces of the set, so-called booming is likely to occur, in which low-pitched sounds are heard with a special tone color. Conventionally, as a countermeasure against this booming, as shown in FIG. 6, a sound absorber is installed in the corner of the room where the sound pressure rises, and the sound absorber attenuates and suppresses the sound in the low frequency range. The sound absorber is a mass of porous sound absorbing material such as glass wool or urethane foam formed into a triangular column shape or a column shape according to the shape of the corner of the room, and it becomes possible to efficiently absorb the sound in the low frequency range. ing.

[0003]

However, such a conventional sound absorber requires a considerable volume for attenuating the sound in the low-pitched sound range, and there is a problem that the volume of the room becomes small and the volume of the room becomes small. It was

By the way, as shown in FIG. 7, in a listening room or the like, for air conditioning and ventilation in the room, there are an air outlet having one end connected to an intake duct and an air inlet having one end connected to an exhaust duct. It is provided. These outlets and inlets are open on the ceiling surface, so when heating,
There was a problem that the warm air caused a short circuit, and the room could not be heated and ventilated uniformly.

The present invention has been made in order to solve the above problems, and provides a sound absorber capable of maintaining a good acoustic environment and a living environment in a room, and a sound room using the same. Is the purpose.

[0006]

In order to achieve the above object, the sound absorbing body according to claim 1 is provided with a chamber member arranged at a corner of a room and having one end connected to a duct, and a porous member covering the chamber member. A sound absorbing material, and an air opening is formed in the chamber member.

Further, the sound absorbing body according to claim 2 is provided with a chamber member arranged at a corner of the room and having one end connected to a duct, and a porous sound absorbing material adhered to the chamber member. It is characterized in that an air opening is formed in the member.

In these cases, it is preferable that the air opening of the chamber member is a large number of small holes.

Further, in this case, it is preferable that the large number of small holes are distributed over the entire peripheral surface of the chamber member.

In these cases, it is preferable that the porous sound absorbing material has a low sound absorbing structure.

Further, in these cases, it is preferable that the porous sound absorbing material is provided with a notch.

On the other hand, the acoustic chamber of claim 7 uses two sound absorbers according to any one of the above, the chamber member of one sound absorber is connected to the intake duct, and the chamber member of the other sound absorber is connected. The sound absorbing body is connected to an exhaust duct, and these sound absorbing bodies are arranged at opposing positions in the room.

[0013]

According to the sound absorbing body of the present invention, when the duct is an intake duct, the intake air supplied from the duct to the chamber member passes through the porous sound absorbing material from the air opening of the chamber member and enters the room. On the contrary, when the duct is an exhaust duct, the air in the room passes through the porous sound absorbing material, is guided to the chamber member from the air opening, and is exhausted through the duct. In this case, since the chamber member is arranged in the room, the flow of the indoor air is made uniform, and the intake or the exhaust is efficiently performed. At that time, the porous sound absorbing material functions as a heat insulating material for the chamber member and also as a sound absorbing material for mechanical sound propagating from the duct.
On the other hand, with respect to the sound in the room, since the sound pressure is generally arranged at the corner of the room where the sound pressure easily rises, it is possible to absorb the room sound and suppress resonance due to the inner wall. Moreover, since the chamber member acts as an air layer provided on the back surface side of the porous sound absorbing material, it particularly absorbs the sound in the low frequency range.

According to the sound absorbing body of the second aspect, when the duct is an intake duct, the intake air supplied from the duct to the chamber member passes through the porous sound absorbing material and enters the chamber through the air opening of the chamber member. On the contrary, when the duct is the exhaust duct, the air in the room is guided from the air opening through the porous sound absorbing material into the chamber member and is exhausted through the duct. Therefore, just like the sound absorber described above, intake or exhaust can be efficiently performed, and resonance or the like due to the inner wall can be suppressed. In this case, the chamber member itself can be positively incorporated into the interior design.

According to the sound absorbing body of the third aspect, since the air opening of the chamber member is a large number of small holes, the intake air is uniformly supplied to the room or the exhaust air of the room is uniformly sucked.

According to the sound absorbing body of the fourth aspect, since the large number of small holes are distributed over the entire peripheral surface of the chamber member, it can be easily manufactured using the chamber member itself, punching metal or the like. In addition to this, it is possible to achieve more uniform air supply and even air suction. Further, since the small holes are widely distributed, it is possible to keep the indoor draft (air velocity) low.

According to the sound absorbing body of claim 5, since the porous sound absorbing material has the sound absorbing structure for low sound, it is possible to satisfactorily absorb the sound in the low sound range of the room, and effectively perform the booming due to the resonance in the room. Can be prevented.

According to the sound absorbing body of the sixth aspect, since the notch is formed in the porous sound absorbing material, the air is directly sucked into or exhausted from the notch through the air opening. Therefore, the ventilation loss on the duct side can be reduced, and the notch can be positively incorporated as an indoor design.

According to the acoustic chamber of claim 7, two sound absorbers are used, the chamber member of one sound absorber is connected to the intake duct, and the chamber member of the other sound absorber is connected to the exhaust duct. By arranging these sound absorbers at opposite positions in the room, it is possible to prevent the short circuit of the room air, and it is possible to efficiently exchange the room air while keeping the draft low. .

[0020]

Embodiments of the sound absorbing body of the present invention will be described in detail below with reference to the accompanying drawings. This sound absorber
It serves as an original sound absorber installed in the corner of the room to prevent booming, and also as an outlet or inlet for indoor air. FIG. 1 is a perspective view of a sound absorbing body according to the first embodiment. As shown in FIG. 1, the sound absorbing body 1 is provided with a chamber member 2 formed in a cylindrical shape and a chamber member 2 so as to cover the chamber member 2. It is composed of a porous sound absorbing material 3.

The chamber member 2 is composed of a cylindrical chamber member body 4, a connecting duct 5 attached to the upper end of the chamber member body 4, and a bottom plate 6 attached to the lower end of the chamber member body 4. A large number of uniformly distributed small holes 7 are formed on the peripheral surface of the chamber member body 4.
Each small hole 7 functions as an air outlet or an air inlet. The connection duct 5 is formed to have the same diameter as the intake duct 8 or the exhaust duct 9 shown in FIG. 2, and a flange 5a for connecting to the intake duct 8 or the exhaust duct 9 is provided at the tip.

The porous sound absorbing material 3 is made of, for example, glass wool, rock wool, urethane foam or the like,
It is provided so as to be wound around the outer peripheral surface of the chamber member 2. Further, the porous sound absorbing material 3 is formed thick so that the sound absorption in the low sound range is given priority. A notch 3a is formed in an intermediate portion in the vertical direction of the porous sound absorbing material 3 so that a part of the chamber member 2 is exposed. The cutout portion 3a serves as an opening portion for intake / exhaust air that directly faces the room, and has a slightly oblique cutout design in consideration of the design of the room (see FIG. 2).

When the porous sound-absorbing material 3 has a relatively low density, the notch 3a may be omitted to cover the entire circumferential surface of the chamber member 2 with no space. Further, the chamber member 2 is preferably formed by bending a punching metal or an expanded metal having a large number of small holes 7 into a cylindrical shape.
When a is provided, it is preferable to use punching metal, and when the porous sound absorbing material 3 covers the entire peripheral surface of the chamber member 2, it is preferable to use expanded metal. Further, although not shown, for example, the chamber member 2 may be formed of expanded metal to have a large diameter, and the porous sound absorbing material 3 may be provided inside the chamber member 2.

2 and 3 show a state in which the four sound absorbers 1, 1, 1, 1 thus constructed are installed in a room. The four sound absorbers 1, 1, 1, 1 are arranged at the four corners of the room in consideration of the prevention of room booming, and are arranged so that they fit exactly on the floor from the ceiling in consideration of the design of the room. Has been. An intake duct 8 is connected to each of the two sound absorbers 1, 1 arranged in one of the longitudinal directions of the room, and an exhaust duct is connected to each of the two sound absorbers 1, 1 arranged in the other. 9 is connected. That is, the two sound absorbers 1 and 1 on the intake side and the two sound absorbers 1 and 1 on the exhaust side are arranged to face each other on a diagonal line of the room.

The intake air supplied from the intake duct 8 to the two sound absorbers 1 and 1 on the intake side is blown out into the room mainly through the small holes 7 exposed in the cutouts 3a of the porous sound absorbing material 3 and the inside of the room. It flows slowly in a vertical direction, and 2 on the exhaust side
The individual sound absorbers 1, 1 are sucked through the small holes 7 exposed in the cutouts 3 a of the porous sound absorbing material 3 and guided to the exhaust duct 9. On the other hand, the sound in the room is efficiently absorbed by the four porous sound absorbing materials 3 provided in the corners of the room where the sound pressure rises.

As described above, according to this embodiment, the sound absorbing body 1 for preventing booming also serves as a blowout port or a suction port for indoor air, so that the corner of the room, which tends to become a dead space, is effectively used. be able to. In addition, since the indoor air is blown out from the upper and lower intermediate positions of the room and is sucked in from the upper and lower intermediate positions, the two air absorbers 1 and 1 are arranged in opposition to each other, and the flow of the indoor air is made uniform. can do. Moreover, this uniformization eliminates the need to blow out the indoor air strongly, and the draft of the indoor air can be suppressed low.

On the other hand, the sound absorbing body 1 itself, the porous sound absorbing material 3 formed thick, and the air layer on the back surface of the porous sound absorbing material 3 constituted by the chamber member 2 effectively absorb the sound in the low-pitched range. However, booming can be effectively prevented.
Moreover, the porous sound absorbing material 3 absorbs mechanical sound on the ducts 8 and 9 side and also functions as a heat insulating material, and prevents dew condensation on the chamber member 2.

FIG. 4 shows a sound absorber according to the second embodiment of the present invention. In the sound absorbing body 11 of the second embodiment, the notch 13a of the porous sound absorbing material 13 provided in the chamber member 12 is
It extends in a substantially straight line in the vertical direction. Porous sound absorbing material 13
The notch 13a is determined in consideration of the design of the room, but by extending in the vertical direction in this way, the blowout part and the intake part of the room air become linear,
The indoor air flow becomes even more uniform.

FIG. 5 shows a sound absorber according to the third embodiment of the present invention. In the sound absorbing body 21 of the third embodiment, the chamber member 22 is formed in a triangular prism shape, and the porous sound absorbing material 23 is also formed in a triangular prism shape accordingly. The notches 23a of the porous sound absorbing material 23 are formed at two positions in the vertical direction in consideration of the design of the room. In this case, it can be placed in a corner of a room, which tends to become a dead space, without a gap, and can be installed in a corner of a room composed of an inner wall and a ceiling without any discomfort.

As described above, the shape of the sound absorbing body itself and the shape of the notch and the like are determined according to the design of the room, and are not limited to these examples. Further, instead of a large number of small holes as air openings, a single blow-out port or a suction port may be formed so as to be exposed at the cutout portion.

[0031]

As described above, according to the sound absorbing body of the present invention and the acoustic chamber using the same, a porous sound absorbing material is externally or internally attached to the chamber member, and the original sound absorbing body is exposed to indoor air. Since it is also used as an air outlet or an air inlet, it can efficiently absorb sound that may cause acoustic obstruction, and can efficiently exchange indoor air to improve the acoustic environment and living environment in the room. It has an effect that can be maintained.

[Brief description of drawings]

FIG. 1 is an external perspective view of a sound absorbing body according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the interior of the room showing the installation state of the sound absorbing body according to the first embodiment.

FIG. 3 is a plan view of the room showing the installation state of the sound absorbing body according to the first embodiment.

FIG. 4 is an external perspective view of a sound absorbing body according to a second embodiment.

FIG. 5 is an external perspective view of a sound absorbing body according to a third embodiment.

FIG. 6 is a perspective view of the interior of the room showing the installation state of a conventional sound absorber.

FIG. 7 is a perspective view of the interior of a room showing conventional ventilation equipment.

[Explanation of symbols]

 1 Sound Absorber 2 Chamber Member 3 Porous Sound Absorber 7 Small Hole 8 Intake Duct 9 Exhaust Duct

Claims (7)

[Claims] 1. A chamber member, which is disposed in a corner of a room and has one end connected to a duct, and a porous sound absorbing material that covers the chamber member, and an air opening is formed in the chamber member. A sound absorber characterized by. 2. A chamber member, which is arranged at a corner of a room and has one end connected to a duct, and a porous sound absorbing material internally attached to the chamber member, wherein an air opening is formed in the chamber member. A sound absorber characterized by having done. 3. The sound absorber according to claim 1, wherein the air opening of the chamber member is a large number of small holes. 4. The sound absorbing body according to claim 3, wherein the large number of small holes are distributed over the entire peripheral surface of the chamber member. 5. The sound absorbing body according to claim 1, wherein the porous sound absorbing material has a low sound absorbing structure. 6. The sound absorbing body according to claim 1, wherein a cutout is formed in the porous sound absorbing material. 7. Two sound absorbers according to claim 1 are used, and the chamber member of one sound absorber is connected to an intake duct, and the chamber member of the other sound absorber is connected to an exhaust duct. An acoustic room, in which these sound absorbers are arranged at opposite positions in the room.