JP5873252B2 - Sound absorption structure at the corner - Google Patents

Description

  The present invention relates to a sound absorbing structure provided at a corner of a building.

  High sound effects are required in piano performances and audio rooms. In addition, even in general living rooms and bedrooms, in order to enjoy music better, a design that considers acoustic effects is required.

  In order to enhance the acoustic effect, a material having a sound absorbing effect is used for a wall material or a ceiling material, or a wall-mounted or stationary sound absorbing panel is installed.

  However, the rock wool sound-absorbing ceiling material made of a commercially available fiber-based heat insulating material has a problem in the sound absorption effect in the low frequency range. In addition, the sound absorbing material such as the perforated plate has a problem that only a specific sound can be absorbed and the balance of the sound is lost.

  On the other hand, there is a known acoustic obstacle called booming in which a low-pitched sound is accumulated in a corner of a room and the sound balance is poor.

  Therefore, in order to absorb sound in a balanced manner from high to low sounds, a technology has been proposed in which a substantially triangular sound absorbing material with a change in the cross-sectional shape of the sound absorbing material is installed in the corners of the ceiling and walls (Akira Akai). 62-042607 gazette).

Japanese Utility Model Publication No. 62-042607 JP 2007-286387 A

  However, the effect of providing a sound absorbing material with a substantially triangular cross section at the corners of the ceiling and the wall has been confirmed, but in order to actually install it, it takes a lot of work and there is a method that is actually concrete. It has not been proposed, and it is difficult to say that a method for improving indoor sound absorption is widespread.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a sound absorbing structure for a corner portion that uses a sound absorbing material having a substantially triangular cross section to improve indoor sound absorbing performance with a simple method and a good design. And

The above-described problem is a sound absorbing structure provided in an entrance corner composed of two wall surfaces,
A base material fixed to each wall surface;
A sound absorbing material having a substantially triangular cross section;
It consists of a transparent material and a cover material composed of a frame surrounding it.
The sound absorbing material is held between the wall surface and the base material,
This is solved by the sound absorbing structure at the corner of the corner, wherein the cover material is fixed to the base material.

  In this sound absorbing structure, since the sound absorbing material having a substantially triangular cross section is used, the thickness varies depending on the portion of the sound absorbing material, so that sound can be absorbed in a balanced manner from high to low. Since the sound absorbing material is sandwiched and held between the wall surface and the base material fixed to the wall surface, the sound absorbing material can be reliably fixed to the corner of the wall surface with a simple structure.

  In addition, since the cover material consisting of the transparent material and the frame surrounding it is fixed using the base material, the sound absorption material is not exposed and the sound absorption is excellent in the design covered with the cover material. The structure can be realized with a small number of members. Here, the term “substantially triangular” refers to not only the case where the three sides are formed only by straight lines but also the case where the three sides are formed by curves.

  In the above sound absorbing structure, the abutting portion that abuts the base material is preferably chamfered.

  Since the contact portion of the sound absorbing material that contacts the base material is chamfered, it is possible to more firmly fix the sound absorbing material by sandwiching the wall surface and the base material. Here, a part of the sound absorbing material having a substantially triangular section may be chamfered to form a substantially pentagonal shape instead of a substantially triangular shape. It means that the cross section is different from a substantially triangular shape by partial chamfering.

  Furthermore, the cross section of the base material may be a right isosceles triangle.

  Since the cross-section of the base material is a right-angled isosceles triangle, the corner part of the base material that is the base of the right-angled isosceles triangle is fixed in contact with the wall surface to fix the cover material. In contrast, the cover member can be attached so as to be bilaterally symmetric, that is, a base of a right-angled isosceles triangle. Furthermore, the sound absorbing material can be firmly fixed by cooperation with the wall surface.

  The sound absorbing material may be a polyester sound absorbing material having a density of 25 to 35 kg / m 3.

  By being a polyester-based sound absorbing material having a sound absorbing material density of 25 to 35 kg / m 3, it is possible to absorb indoor sound in a balanced manner from low to high.

  Moreover, the transmittance | permeability which comprises a cover material is good in the transmittance | permeability in frequency 1000Hz being 0.9 or more.

  Since the transmittance of the transmitting material constituting the cover material is 0.9 or more at a frequency of 1000 Hz, the sound that reverberates in the room is transmitted without being reflected or absorbed by the transmitting material. It will not hinder.

  Since the present invention is as described above, it is possible to provide a sound absorbing structure at the corner of a corner that improves the sound absorbing performance in the room with a good design by a simple method using a sound absorbing material having a substantially triangular cross section.

FIG. 1 (a) is a cross-sectional plan view showing a sound absorbing structure at the corner of the corner showing the embodiment of the present invention, and FIG. FIG. 2 is an exploded perspective view showing the members constituting the sound absorbing structure at the corners in an exploded manner. FIGS. 1A to 1C are perspective views sequentially showing the construction procedure of the sound absorbing structure at the corner. Figure (a) is a plan view of the room where the sound absorbing structure is installed to show the test situation for confirming the effect of this sound absorbing structure, Figure (b) is a graph showing the result, and Figure (c) is general It is a graph which shows the result of having measured the sound absorption rate at the time of using a typical ceiling sound-absorbing material and a wall sound-absorbing material.

  Next, embodiments of the present invention will be described with reference to the drawings.

  In the sound absorbing structure 1 at the corner of entry which is an embodiment of the present invention shown in FIG. 1, 6 and 6 are base materials, 7 is a sound absorbing material, and 9 is a cover material. In addition, 5 is an entrance corner where the sound absorbing structure is provided, and 2 and 2 are wall surfaces constituting the entrance corner, and each wall intersects at right angles. Reference numerals 3 and 4 denote a floor surface and a ceiling surface, respectively.

  As shown in FIGS. 1A and 2, the base material 6 is a long member having an isosceles triangle cross section, and the bases, which are the sides of the isosceles triangle, are in contact with the wall surfaces 2 and 2. It is fixed in the vertical direction from the floor surface 3 to the ceiling surface 4 with respect to the wall surface.

  The sound absorbing material 7 has a substantially isosceles cross section, and the contact surfaces 8 and 8 are chamfered so that a part of the base angle contacts the base materials 6 and 6, and the chamfered portion is taken into consideration. Then, the sound absorbing material is a substantially home-base type pentagon.

  The sound-absorbing material 7 is a polyester-based foam material having the above-mentioned cross section and having a length from the floor surface 3 to the ceiling surface 4 of the corner 2 and a density of 25 to 35 kg / m3. is there.

  The cover material 9 includes a transmission material 10 having a transmittance of 0.9 or more at a frequency of 1000 Hz and a frame body 11 surrounding the periphery thereof. Since the cover material is installed in a place visible from the room, the transmissive material 10 and the frame 11 are selected also from the viewpoint of design. Here, the frame 11 uses a wooden frame.

  The sound absorbing structure 1 is installed as follows.

  As shown in Fig. 3 (a), the base materials 6 and 6 are fixed with screws 11 to the wall surfaces 2 and 2 constituting the corners 5 where the finishing of the floor surface 3 and the ceiling surface 4 is finished. The base material 6 is fixed by bringing the surface corresponding to the base of the right-angled isosceles triangle out of the three surfaces of the base material 6 into contact with the wall surfaces 2 and 2, and fixing the remaining two surfaces with screws 11 from the face on the corner side. To do. Needless to say, a base for fixing the base material 6 is installed prior to the construction of the wall surface 2.

  Next, the sound absorbing material 7 is fitted in the space formed by the wall surfaces 2 and 2 and the base materials 6 and 6. The sound absorbing material 7 is fixed to the corner 2 by being sandwiched between the wall surfaces 2 and 2 and the base materials 6 and 6. In particular, since the cross-sections of the base materials 6 and 6 are isosceles triangles and the bottom sides are fixed to the wall surfaces 2 and 2, the contact surfaces 8 and 8 of the sound absorbing material 7 of the base materials 6 and 6 are fixed. 8 are installed so as to be parallel to each other, so that a substantially home base type pentagonal sound absorbing material 7 having a chamfered part of the base angle of a substantially isosceles triangle is firmly sandwiched between the base materials 6 and 6. Fixed.

  Next, the sound absorbing material 7 is covered with the cover material 9, and the finish nails 12 are driven and fixed to the frame 11 surrounding the cover material with the base materials 6 and 6 as the base.

  In this sound absorbing structure, since the sound absorbing material having a substantially triangular cross section is used, the thickness varies depending on the portion of the sound absorbing material, so that sound can be absorbed in a balanced manner from high to low. Since the sound absorbing material is sandwiched and held between the wall surface and the base material fixed to the wall surface, the sound absorbing material can be reliably fixed to the corner of the wall surface with a simple structure.

  In addition, since the cover material consisting of the transparent material and the frame surrounding it is fixed using the base material, the sound absorption material is not exposed and the sound absorption is excellent in the design covered with the cover material. The structure can be realized with a small number of members.

  As the base of the sound absorbing material is chamfered and the cross section of the base material is a right-angled isosceles triangle, the cover material is attached to the corner as the mounting base of the cover material. It can be mounted so as to be symmetrical, that is, the base of a right-angled isosceles triangle. In addition, the sound absorbing material can be firmly fixed in cooperation with the wall surface.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, in the above embodiment, the case of the isosceles triangle is shown as the base material, but the shape of the base material is not limited to the isosceles triangle, and the sound absorbing material can be fixed. Changes can be made within the limits of the base of the cover material.

  Needless to say, the material of the base material is not limited.

  Moreover, in said embodiment, although shown about the case where a sound-absorbing material has the height from a floor surface to a ceiling surface, it may be divided into 2 in the height direction, and may be divided more than that. Needless to say.

  The arrangement of the sound absorbing structure may be provided at only one of the four corners of the rectangular room, or may be provided at two places, or may be provided at all corners. What is necessary is just to select arbitrarily according to a sheath shape and the required acoustic performance.

  Incidentally, as shown in FIG. 4 (a), when the sound absorption coefficient in each frequency region was measured in a room in which the present sound absorption structure was arranged at the four corners of the room, the result shown in FIG. 4 (b) was obtained. .

  From the results shown in FIG. 4B, it was confirmed that a high sound absorption coefficient was exhibited in a wide sound range. The results shown in FIG. 4 (c) are the results of measuring the sound absorption coefficient in each frequency range when a general ceiling sound absorbing material or wall sound absorbing material is used. Compared with the case of using the material, it was confirmed that the present sound absorbing structure has a high sound absorbing effect in a wide sound range.

DESCRIPTION OF SYMBOLS 1 ... Sound absorption structure 2 ... Wall surface 5 ... Corner part 6 ... Base material 7 ... Sound absorption material 8 ... Contact surface 9 ... Cover material 10 ... Transmission material 11 ... Frame

Claims (3)

A sound absorbing structure provided at the corner of the corner composed of two wall surfaces,
A base material fixed to each wall surface;
A polyester-based sound absorbing material having a substantially triangular cross section and a density of 25 to 35 kg / m 3 ;
The transmittance at a frequency of 1000 Hz is composed of a transparent material having a transmittance of 0.9 or more and a cover material composed of a frame surrounding the periphery.
The sound absorbing material is held between the wall surface and the base material,
The cover material is fixed to the base material ,
A sound absorbing structure at an entrance corner, wherein the sound absorbing material is covered with the cover material .   The sound absorbing structure of the corner portion according to claim 1, wherein the sound absorbing material has a chamfered contact portion that contacts the base material. The sound absorption structure of the corner portion according to claim 1 or 2, wherein a cross section of the base material is a right isosceles triangle.

Images