JPH02200939A - Sound absorbing device for building - Google Patents

Abstract

PURPOSE:To ensure natural illumination and sound absorption over a whole sound range by installing a sound absorber between respective intersections in a net to form a sound absorbing net and arranging it under a membrane roof. CONSTITUTION:A columnar absorber 6 is formed by a fiber material, foaming resin, sintered aluminum sound absorbing material and so on. The absorber 6 is made into a composite laminating structure of a composite material, a hollow structure, a hard core structure or an acoustically clear covering structure for surface only, as necessary. Respective ropes 5a of the net are passed through respective through holes 7 of the absorber 6, and the absorber 6 is installed between respective net intersections 8, 8 to form a sound absorbing net 4. Finally, the sound absorbing net 4 is arranged over the whole lower side of a membrane roof 1 consisting of an arch 2 and a membrane 3. It is thus possible to make up for sound absorption insufficient in middle and high sound ranges without the sacrifice of natural illumination and ensure uniform sound absorption over a whole sound range.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sound absorbing device for architectural spaces, such as stadiums, assembly halls, music halls, etc., mainly having a membrane roof structure.

[Conventional technology]

In general, in architectural spaces such as stadiums, assembly halls, and music halls with membrane roof structures, surfaces other than the ceiling are finished with sound-absorbing materials, and if necessary, suspended sound absorbers or sound-absorbing hanging membranes are hung from the ceiling, or membrane roofs are installed. By pasting a sound-absorbing membrane underneath, the acoustics in the room are adjusted (adjusting reverberation time, reducing echoes, diffusing sound, etc.).

[Problem to be solved by the invention]

However, such a method has various problems.

In other words, the method of hanging a suspended sound absorber or sound absorbing hanging membrane on the ceiling is as follows:
Not only are sound absorbing bodies and sound absorbing hanging membranes unsightly, but they also have the drawback of being less effective in preventing flutter echoes that tend to occur between the ceiling and the floor, especially in architectural spaces with membrane roof structures.

Similarly, in the building space of a membrane roof structure, if a sound-absorbing membrane is applied to the entire roof, the entire roof becomes a double membrane, which significantly reduces the daylight rate, which is an advantage of membrane roofs. The downside is that you won't be able to take in enough sunlight.

This invention was proposed in order to solve the above-mentioned conventional problems, and provides a sound absorbing device for architectural spaces that does not impair the design appearance and daylighting rate, and also has an extremely high sound absorbing effect. The purpose is to

[Means to solve the problem]

This invention particularly relates to a sound absorption device for architectural spaces of membrane roof structures, in which a sound absorption net is installed below the ceiling over the entire ceiling surface or a portion thereof, and the sound absorption net is configured in a grid or diamond pattern. The above object is achieved by having a structure in which a plurality of sound absorbers are installed between the intersection points of each rope of the net main body.

〔Example〕

The present invention will be explained below with reference to an illustrated embodiment.

The membrane roof 1 is constructed by placing a membrane 3 on an arch 2.2, and the underside of the membrane roof 1 has a sound absorbing 'f! 44 is pasted over the entire membrane roof 1 at a suitable distance from the membrane roof 1 or in close contact with the membrane roof 1.

The membrane 3 is made of glass fiber coated with Teflon or the like, and allows daylight to enter.

The sound absorbing m4 consists of a net main body 5 and a plurality of sound absorbing bodies 6. It is composed of...

The net main body 5 is formed from a rope (for example, wire rope, hemp rope, steel wire, etc.), and the mesh is formed in a lattice shape.

Note that the mesh does not necessarily have to be in the form of a lattice, and may be formed in a polygonal shape such as a rhombus or a hexagon.

A plurality of sound absorbers 6. are attached to each rope 5a, . . . of the net main body 5. ... is installed.

The sound absorbing body 6 is formed into a cylindrical or polygonal column shape, and a through hole 7 is formed in the center, and each rope 5 is inserted into the through hole 7.
They are attached between the intersection points 8, 8 of each mesh by passing them through a. Therefore, each row 15a of the net body 5,
... is not exposed to the outside, and the sound absorber 6. Almost the entire area is covered by...

In principle, one sound absorber 6 is attached between the intersections 8 and 8 of each mesh, but it may be divided into a plurality of pieces and attached.

The sound absorbing body 6 is made of an organic or inorganic fiber material (for example, glass wool), a porous material such as foamed resin, or a sintered material such as a sintered aluminum sound absorbing material.

The sound absorbing body 6 does not necessarily have to be made of one type of material, but may have a composite structure made of two or more types of materials, or may have a laminated structure.

Moreover, many hollow parts may be formed inside, or most of the inside may be made hollow.

Also, sound absorber 6. ... may be coated with an acoustically transparent coating material.

Furthermore, only the central portion where the through hole 7 is formed may be formed of a hard material, and the surrounding area may be formed of an original sound-absorbing material.

With such a configuration, the sound absorbing net 3 is stretched over the entire surface of the membrane roof under the membrane roof l, and the entire membrane serves as a sound absorbing surface and exhibits a sound absorbing function.

That is, the synergistic effect of the good sound absorption properties of the membrane roof in the low frequency range and the good sound absorption properties of the sound absorption net in the middle and high frequency ranges makes it possible to ensure good sound absorption performance over the entire sound range.

Further, as long as the diameter of the sound absorbing body 6 is not made too large compared to the mesh spacing of the sound absorbing net 4, the mesh can be ensured to be sufficiently large.

Therefore, the light absorption rate is not impaired by the sound absorbing M44, and daytime sunlight can be sufficiently taken in through the rope.

In such a case, if the sound absorber 6 is made of a material with good translucency, the lighting rate will be doubled.

Furthermore, since it can be installed uniformly over the entire ceiling, it does not create an unsightly design.

Furthermore, flutter echoes that tend to occur between the ceiling and the floor can also be effectively prevented.

Generally speaking, the sound absorption coefficient of membrane roof structures is good in the low frequency range and poor in the mid to high frequency range, so if the sound absorption properties of the sound absorbing body are adjusted to maintain sound absorption to compensate for the insufficient sound absorption coefficient in the mid to high frequency range. , it is possible to maintain overall sound absorption properties in the entire sound range.

It is relatively easy to ensure sound absorption in the medium and high frequency ranges due to the general characteristics of the sound absorbing material that constitutes the sound absorber.

In addition, although the embodiments have been described with respect to sound absorption devices for architectural spaces in membrane roof structures, the invention is not limited to this type of structure, and can be applied to air-pressurized membrane roof structures as well as non-membrane structures. Needless to say, it can also be used in architectural spaces in general roof structures.

〔Effect of the invention〕

Since the present invention has the above configuration, it has the following effects.

■ - It supplements the sound absorption in the medium and high frequency ranges, which is often lacking in ceilings with multilayer roof structures, and can ensure uniform sound absorption across the entire sound range.

■ Since the sound-absorbing membrane is not installed over the entire surface of the underside of the membrane roof, it is possible to let in sunlight and to take in sufficient sunlight during the day.

Moreover, good sound absorption properties can be ensured.

■ It is possible to suppress flutter echoes between the ceiling and floor, which tend to occur in architectural spaces with membrane roof structures.

Furthermore, it does not give an unsightly feeling compared to the hanging membrane type or hanging sound absorber type.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of this invention.
FIG. 1 is a perspective view of the membrane roof, FIG. 2 is a sectional view thereof, FIG. 3 is a sectional view of the sound-absorbing net, and FIG. 4 is a perspective view of the sound-absorbing body. ■...Membrane roof, 2...Arch, 3...Membrane, 4...
・Sound absorbing net, 5... Net body, 6... Sound absorbing body, 7...
Through hole, 8... intersection part. Figure 22/Figure 22

Claims (1)

[Claims] (1) A sound-absorbing net 4 is installed on the lower side of the ceiling, and the sound-absorbing net 4 constitutes a net body 5 in a lattice-like or diamond-like shape, and the intersections of the ropes 5a constituting the net body 5. 8,
1. A sound absorbing device for an architectural space, characterized in that the sound absorbing device is constructed by installing a plurality of sound absorbing bodies 6 between spaces 8 and 8.