JP2003057106A - Structure for sound insulation measurement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for sound insulation measurement which can make every body to recognize the sound insulation performance of a glass structure such as laminated glass as actual feeling. SOLUTION: The structure for sound insulation measurement is constituted to be sealable by using at least on one side, a glass structure 1 as an object material of sound insulation measurement, in which a sound source 5 for sound insulation measurement is arranged. Or it is constituted of a material superior in sound insulation to the glass structure for the other side than the side constituted of the glass structure. Or it is constituted to be a rectangular solid whose four sides are the glass structure and the length to breadth ratio is 1:1 to 2:1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation measuring structure capable of recognizing the sound insulation of a glass component such as laminated glass as a real feeling.

[0002]

2. Description of the Related Art Laminated glass in which an interlayer film made of plasticized polyvinyl butyral is sandwiched between at least two glass plates is excellent in transparency, weather resistance and adhesiveness, and also has good penetration resistance and is resistant to breakage. Since it has the basic performance required for laminated glass such that glass fragments are less likely to scatter, it is widely used for window glass of automobiles and buildings, for example.
Further, ethylene-vinyl acetate copolymer and the like are used as an interlayer film for window glass of buildings in addition to plasticized polyvinyl butyral.

This type of laminated glass has good basic performance and excellent safety, but has poor sound insulation. In particular,
In the mid-high range near the frequency of 2000 Hz, the sound transmission loss value decreases due to the coincidence effect, and the sound insulation property decreases. The coincidence effect here means that when a sound wave is incident on the glass plate, the transverse wave conducts on the glass surface due to the rigidity and inertia of the glass plate and the transverse wave and the incident sound resonate, resulting in the transmission of sound. A phenomenon that occurs.

The demand for sound insulation has increased more and more recently, and in particular, the window glass for construction is required to have sound insulation laminated glass having excellent sound insulation performance in addition to excellent basic performance and safety. ing.

As a laminated glass having such a sound-insulating property, Japanese Patent Laid-Open No. 7-97240 discloses a sound-insulating laminated glass using an intermediate film made of a plasticized polyvinyl butyral resin film or a plasticized vinyl chloride resin film. Proposed.

As a sound insulation evaluation method for such a sound insulation laminated glass, there is a method based on JIS A 1416 or a method based on a damping test described in Japanese Patent Laid-Open No. 4-254444. However, in these methods, although the sound insulation property can be evaluated as a value of transmission loss, it was not possible to confirm how much the sound insulation property was actually heard. Therefore, it was very difficult for users and consumers to understand the sound insulation property.

[0007]

SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems, and an object thereof is to measure the sound insulation property of a glass component such as a laminated glass as a sound insulation property by anyone. It is to provide a structure.

[0008]

According to a first aspect of the present invention, there is provided a sound insulation measuring structure, wherein the sound insulation is structured so that it can be hermetically sealed by using at least one surface of a glass constituent which is a sound insulation measurement target substance. A structure for measurement, characterized in that a sound source for sound insulation measurement is arranged inside thereof.

A sound insulation measuring structure according to a second aspect of the present invention is the sound insulation measuring structure according to the first aspect, wherein the surfaces other than the surface formed by using the glass structure are It is characterized in that it is made of a material which is more excellent in sound insulation than the above glass construct. The sound insulation measuring structure according to claim 3 is the sound insulation measuring structure according to claim 1 or 2, wherein the sound insulation measuring structure has a rectangular parallelepiped shape, and a side surface of the rectangular parallelepiped. The four surfaces forming the glass composition are the above glass components, and the length: width ratio of the glass components is 1: 1.
˜2: 1. The sound insulation measuring structure according to the invention described in claim 4 is the sound insulation measuring structure according to any one of claims 1 to 3, wherein the glass construct is a laminated glass. And

The details of the present invention will be described below. The glass construct used in the present invention is a substance to be measured for sound insulation, and is manufactured using at least one glass plate. Examples of the glass component include float glass, tempered glass, laminated glass, double glazing, and double glazing. Further, it may be a polycarbonate plate, an acrylic plate, or other organic glass plate.

In the present invention, a sound insulation measuring structure is constructed by using the above glass construct on at least one surface. The sound insulation measuring structure may have any shape, but normally, a hexahedron such as a rectangular parallelepiped is easy to manufacture. In the hexahedron sound insulation measuring structure, at least 1 glass constituent is used.
It may be used for more than 5 surfaces, but preferably 5 or more, more preferably 5 surfaces. The remaining surface may be made of any material as long as it has excellent sound insulation. Also,
This remaining surface is preferably used as the bottom surface in consideration of breakage of the glass structure.

In the sound insulation measuring structure of the present invention, it is preferable that the surfaces other than the surface formed by using the above-mentioned glass component are made of a material having a higher sound insulation than the glass component.

Further, it is preferable that the size of the glass component has a length: width ratio of 1: 1 to 2: 1. This is because the sound insulation performance of the glass construct differs depending on the ratio of length to width, and the sound insulation performance tends to vary depending on the glass construct within the above range.

The sound insulation measuring structure of the present invention needs to be hermetically sealed. For example, if there is a gap between the surfaces, sound will leak from the gap during sound insulation measurement, so if there is a gap, you must fill it with a general sealing material. I won't.

The sound insulation measuring structure of the present invention needs to have a sound insulation measuring sound source arranged therein. In this case, it is preferable that the sound source is arranged inside the structure and the amplifier and the like are arranged outside so that the type and volume of the sound can be changed from the outside.

In a particularly preferred embodiment of the sound insulation measuring structure of the present invention, the shape is a rectangular parallelepiped, and the four surfaces forming the side surfaces of the rectangular parallelepiped are the above-mentioned glass constituents, and the longitudinal direction of the glass constituents. : The lateral ratio is 1: 1 to 2: 1.

The size of the sound insulation measuring structure of the present invention is not particularly limited, but is preferably a size that can be carried.

[0018]

After the sound insulation measuring structure of the present invention is hermetically sealed, the sound insulation measuring sound source located inside of the structure produces a sound of an appropriate amplitude and frequency, and the sound is heard from the outside. Anyone can perceive the sound insulation of the glass composition, which is the substance to be measured, as a real feeling.

[0019]

EXAMPLES Examples of the present invention will be shown below. Example 1 Production of Sound Insulation Measurement Structure A sound insulation measurement target material was float glass having a thickness of 6 mm, and the above-mentioned five float glasses and a soundproof rubber plate were used to obtain the rectangular parallelepiped structure shown in FIG. It was made. Regarding the size of the above rectangular parallelepiped, the top plate 1 is a square of 244 mm × 244 mm,
The height is 294 mm (the ratio of the length of the side surface 2 to the width is 1.
2: 1). 5mm thick and 244mm x 2 in size
A 44 mm soundproof rubber plate 3 was used for the bottom surface, and the above float glass was used for the other 5 surfaces. Further, a rubber 4 having a thickness of 2.5 mm was laid on the bottom surface at a portion contacting the float glass. A sound source 5 for sound insulation measurement (the center of the sound generation position is 10
0mm height) and placed the amplifier 6
Was placed outside the rectangular parallelepiped to produce the sound insulation measuring structure of the present invention.

Example 2 Production of Sound Insulation Measuring Structure A polyvinyl butyral resin film having a thickness of 0.76 mm (trade name, S-REC film, manufactured by Sekisui Chemical Co., Ltd.) was used as a float glass 2 having a thickness of 3.0 mm. A laminated glass was produced by sandwiching the laminated glass between the sheets by a usual manufacturing method. A sound insulation measurement structure was produced in exactly the same manner as in Example 1 except that this laminated glass (sound insulation measurement target substance) was used instead of the float glass.

(Example 3) Production of structure for sound insulation measurement A polyvinyl butyral resin film (trade name, S-REC acoustic film, manufactured by Sekisui Chemical Co., Ltd.) having a thickness of 0.76 mm and having a sound insulation property was used. It was sandwiched between two 0 mm float glasses to prepare a laminated glass by a usual manufacturing method. This laminated glass (substance to be measured for sound insulation)
A sound insulation measuring structure was produced in exactly the same manner as in Example 1 except that was used instead of the float glass.

(Embodiment 4) The size of the rectangular parallelepiped structure in Embodiment 1 is a square having a top plate of 244 mm × 244 mm and a height of 244 mm (the ratio of the length to the width of the side surface is 1: 1). Except for the above, a sound insulation measuring structure was produced in exactly the same manner as in Example 1.

(Embodiment 5) The size of the rectangular parallelepiped structure in the embodiment 1 is set to a square having a top plate of 200 mm × 200 mm and a height of 500 mm (the ratio of the length to width of the side surface is 2.5: 1). Except for the above), a sound insulation measuring structure was produced in exactly the same manner as in Example 1.

Sound Insulation Measurement As sounds emitted from the sound insulation measurement sound source 5 in the sound insulation measurement structures of Examples 1 to 5, sounds of jet machines, limited express trains, and road works, respectively, were recorded at the site. Using. The sound was generated from the sound source, and the intensity (dB) of the sound was measured outside the sound insulation measuring structure. The measurement position was 100 mm away from the sound insulation measuring structure, and the height from the floor surface where the sound insulating measuring structure was placed was 100 mm. As a comparative example, the sound intensity was measured in the same manner as above except that the sound source was not placed inside the sound insulation measuring structure. The results of these measurements are shown in Table 1.

[0025]

[Table 1]

[0026]

Since the sound insulation measuring structure of the present invention has the above-mentioned structure, anyone can recognize the sound insulation of the glass structure such as laminated glass as a real feeling.

[Brief description of drawings]

FIG. 1 is a perspective view of a sound insulation measuring structure according to a first embodiment.

[Explanation of symbols]

1 Top plate 2 sides 3 soundproof rubber plate 4 Soundproof door rubber 5 Sound source for sound insulation measurement 6 amplifier

Claims (4)

[Claims] 1. A sound insulation measuring structure, which is configured to be hermetically sealed by using a glass construct, which is a sound insulation measuring object, on at least one surface, and in which a sound insulation measuring sound source is arranged. A structure for measuring sound insulation, which is characterized in that 2. The sound insulation measurement according to claim 1, wherein the surfaces other than the surface formed by using the glass structure are made of a material having a higher sound insulation property than the glass structure. Structure. 3. The sound insulation measuring structure has a rectangular parallelepiped shape, and the four surfaces forming the side surfaces of the rectangular parallelepiped are the above glass constituents, and the glass constituent has a length: width ratio of 1: 1. ~
The structure for measuring sound insulation according to claim 1 or 2, wherein the structure is 2: 1. 4. The sound insulation measuring structure according to claim 1, wherein the glass construct is a laminated glass.