JPH074606U - Sound absorbing wedge - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a sound absorbing wedge that reduces visual stimulation in an anechoic room, reduces reflected sound related to the performance of the anechoic room, and further improves sound absorbing performance as a sound absorbing member. Is intended. [Structure] In a sound absorbing wedge 1 made of a sound absorbing material and having a sound absorbing portion 3 having a wedge-shaped cross section formed on one side of a rectangular base 2, a tip 4 of the sound absorbing portion 3 having a wedge-shaped cross section is a curved surface, and a slope is a wavy slope 5. It is characterized by

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a sound absorbing wedge used to construct an inner wall of an anechoic chamber.

[0002]

[Prior art]

 Conventionally, the sound absorbing wedge used to form the inner wall of the anechoic chamber is made of a sound absorbing material such as glass wool, cloth, or other fibrous material, or urethane foam, or other open air absorbing material. Was formed by forming a sound absorbing part having a wedge-shaped cross section. The sound absorbing part had one with a wedge-shaped cross section, two, three, or the like.

[0003] The tip of each sound absorbing portion has been sharpened like the tip of a wedge, or has a flat surface formed by cutting the tip.

[0004]

[Problems to be solved by the device]

 In the conventional sound absorbing wedge as described above, if the sound absorbing portion has a sharp tip such as a wedge tip, a large number of sharp tips will face the anechoic chamber. There was a problem that the human beings felt anxious in an anechoic room because of the strong visual stimulus.

Further, in the case where the tip of the sound absorbing portion having a wedge-shaped cross section is cut to form a flat surface, the flat surface constitutes a sound reflecting surface, which is a problem in terms of performance as an anechoic chamber. Was there.

[0006]

[Means for solving the problem]

 The present invention has been made in view of the above-mentioned problems, and reduces visual stimuli in an anechoic chamber, reduces reflected sound related to the performance of the anechoic chamber, and further absorbs sound as a sound absorbing member. Also aims to provide an improved sound absorbing wedge.

The sound absorbing wedge of the present invention, which has been made for the purpose described above, is a sound absorbing wedge made of a sound absorbing material, wherein a sound absorbing portion having a wedge-shaped cross section is formed on one side of a rectangular base. It is characterized in that the tip of the sound absorbing portion is a curved surface and the slope is a wavy slope.

The sound absorbing parts having a wedge-shaped cross section may be arranged in parallel with each other.

[0009]

[Action]

 According to the sound absorbing wedge of this invention, the sound absorbing portion having a wedge-shaped cross section has a curved tip, so that the visual stimulus due to the sharp tip can be softened, and the sound wave that collides with the curved tip is Unlike the conventional flat end surface, it can be directed to a different return path from the outward path without being reflected to the same return path as the outward path, thus reducing reflected sound related to the performance of the anechoic chamber.

Further, by making the slope of the sound absorbing part having a wedge-shaped cross section a wavy slope, it is possible to increase the surface area of the sound absorbing part and improve the sound absorbing performance of the sound absorbing member.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a sound absorbing wedge 1 of the first embodiment, which is formed by molding glass wool, and a sound absorbing portion 3 having a wedge-shaped cross section is provided on one side of a square base 2. The sound absorbing portion 3 has a tip 4 formed into a curved surface, and upper and lower slopes are wavy slopes 5.

FIG. 2 shows a part of the inner wall of an anechoic chamber constructed by using the sound absorbing wedge 1 of the above embodiment. The sound absorbing wedges 1 are vertically and horizontally adjacent to each other, and the sound absorbing wedges 1 are combined so that the longitudinal directions of the tips 4 are orthogonal to each other.

According to the sound absorbing wedge of the above embodiment, since there is no sharp portion such as the tip of the wedge on the inner wall of the anechoic chamber, it is possible to reduce the visual stimulus to the human being in the anechoic chamber.

Regarding the sound absorbing performance, the sound absorbing effect can be improved because the slope of the sound absorbing portion 3 is the wavy slope 5 to increase the surface area. A part of the sound incident on the sound absorbing part 3 is reflected without being absorbed, but in the conventional sound absorbing wedge, as shown on the right side of FIG. 3, it is vertically incident on the flat surface 6 at the tip of the sound absorbing part. The sound waves were reflected vertically and returned to the sound source 7 through the same path as the outward path, which caused the performance of the anechoic chamber to deteriorate. However, in the sound absorbing wedge of the embodiment, the sound absorbing wedge shown in the left side of FIG. As described above, at the curved front end 4 of the sound absorbing portion 3, the sound waves reflected upward or downward like the lines 8 and 8 and reflected toward the sound source 7 in the same path as the outward path can be reduced, and the anechoic chamber can be reduced. The performance can be improved.

4 and 5 show a sound absorbing wedge of another embodiment of the present invention. In FIG. 4, one side of the square base 2 is provided with two sound absorbing parts 3 similar to the above. The sound absorbing parts 3 are provided in parallel, and in FIG. 5, three sound absorbing parts 3 are provided vertically. As described above, the number of the sound absorbing parts 3 may be set in parallel as needed, but in reality, the number of the sound absorbing parts 3 is about 1 to 3.

The effect of providing a plurality of sound absorbing parts 3 in parallel is the same as that of the above-described embodiment, and it is possible to reduce visual stimulus, improve sound absorbing effect by increasing surface area, reduce reflected sound, and the like. .

[0017]

[Effect of device]

 As described above, according to the present invention, the visual stimulus is reduced, the reflected sound is reduced, and the sound absorbing performance is improved. Therefore, an anechoic chamber that reduces the visual stimulus and has high performance is constructed. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a diagram of an embodiment of the present invention, in which (a) is a perspective view,
(B) is a sectional view.

FIG. 2 is a partial front view of the embodiment in a use state.

FIG. 3 is an explanatory diagram of a sound wave reflection path of the embodiment.

FIG. 4 is a side view of another embodiment of the present invention.

FIG. 5 is a side view of still another embodiment of the present invention.

[Explanation of symbols]

 1 Sound absorption wedge 2 Square base 3 Sound absorption part 4 Tip 5 Wavy slope

Claims (2)

[Scope of utility model registration request] 1. A sound absorbing wedge comprising a sound absorbing material and a sound absorbing portion having a wedge-shaped cross section formed on one side of a rectangular base, wherein the sound absorbing portion having a wedge-shaped cross section has a curved end and a slope is a wavy slope. Sound absorption wedge characterized by. 2. The sound absorbing wedge according to claim 1, wherein one to three sound absorbing portions having a wedge-shaped cross section are arranged in parallel.