JP6211400B2 - Sound absorbing structure - Google Patents

Description

  The present invention relates to a sound absorbing structure using a Helmholtz resonator.

  Conventionally, a sound absorbing structure that absorbs sound using the principle of a Helmholtz resonator is known. Such Helmholtz resonators are generally configured using a perforated plate with a large number of air holes, and sound in a predetermined frequency range defined by the diameter of the air holes and the volume of the sound absorbing chamber is generated inside the sound absorbing structure. Resonance is generated when entering, and frictional heat is generated by vibration of the air hole portion, and a part of the vibration energy is converted into heat energy, thereby producing a sound absorbing action.

  In order to arrange a sound absorbing structure using such a Helmholtz resonator on a ceiling surface or the like, for example, a structure as described in Patent Document 1 can be used. That is, Patent Document 1 discloses that a strip or a protrusion projecting to the upper surface side of the bottom surface portion by denting the lower surface side of the bottom surface portion into a longitudinal required portion of the bottom surface portion of the main body having a groove shape with an upper opening. A plurality of protruding protrusions are provided, and a sound absorbing hole is provided in parallel on the top surface of the protruding protrusion, and a connecting protrusion is provided in the longitudinal direction on one of the outer side surfaces of the main body. And the ceiling material which provided the insertion groove part which can insert the front-end | tip edge part of this connection protrusion in the other side wall outer surface part of the main body is disclosed. By applying the structure described in Patent Document 1 and providing a sound absorbing chamber closed on the back side of the hole, a sound absorbing structure using a Helmholtz resonator can be arranged on the ceiling surface or the like.

Japanese Utility Model Publication No. 63-8309

  However, when a Helmholtz resonator is manufactured using the structure described in Patent Document 1, the main body is formed in a box shape to provide a sound absorption chamber, or the gap between the main body and the ceiling material fixture is filled. A member has to be attached, and there are problems such as difficulty in manufacturing and poor workability.

  Therefore, an object of the present invention is to provide a sound absorbing structure that can manufacture a Helmholtz resonator using a simple aluminum profile and the like and can be easily constructed.

  The present invention has been made to solve the above-described problems, and is characterized by the following.

(Claim 1)
The sound absorbing structure according to claim 1 is a sound absorbing structure using a Helmholtz resonator, wherein the receiving member is fixed to a building housing side, the resonator body material fitted to the receiving member, and the resonance Small resonator lids fixed to both ends of the resonator body material, the resonator body material is substantially U-shaped in cross section, and both ends of the resonator body material are covered with the small mouth lid, and the resonator The receiving member is fitted into the longitudinal opening of the main body to form a sound absorbing chamber, an air port is opened in the sound absorbing chamber to form a Helmholtz resonator, and the air port is formed in the receiving member A plurality of air holes for opening are open toward the building housing side .

(Claim 2)
The invention according to claim 2 is a sound-absorbing structure using a Helmholtz resonator, a receiving member fixed to a building housing side, a resonator body material fitted to the receiving member, and the resonator body And the resonator body material has a substantially U-shaped cross section, covers both end openings of the resonator body material with the mouthpiece cover, and the resonator body material. A sound absorbing chamber is formed by fitting the receiving member into the longitudinal opening of the horn, a Helmholtz resonator is formed by opening an air port in the sound absorbing chamber, and the air port is formed in the receiving member. The plurality of air holes are open on the building housing side with respect to the resonator body material .

(Claim 3)
The invention described in claim 3 is characterized by the following points in addition to the characteristics of the invention described in claim 1 or 2.
That is, the receiving member is fixed to the building skeleton side through a panel material fixed to the building skeleton side.

(Claim 4)
The invention described in claim 4 is characterized by the following points in addition to the characteristics of the invention described in claim 3 described above.
That is, a concave portion is provided on the surface of the panel material, and the receiving member is fixed to the concave portion.

(Claim 5)
The invention described in claim 5 is characterized by the following points in addition to the characteristics of the invention described in claim 3 or 4.
That is, a leg portion is provided on the back surface of the panel material, and the leg portion is brought into contact with the building frame side.

(Claim 6)
The invention described in claim 6 is characterized by the following points in addition to the features of the invention described in any one of claims 1-5.
That is, a fall prevention means for directly or indirectly connecting the receiving member and the resonator body material is provided.

Invention of Claim 1 and 2 is as above, It is fixed to the both ends of the receiving member fixed to the building skeleton side, the resonator main body material fitted to the said receiving member, and the said resonator main body material. The resonator body material has a substantially U-shaped cross section, covers both end openings of the resonator body material with the mouthpiece lid, and extends to the longitudinal opening of the resonator body material. Since the sound absorbing chamber is formed by fitting the receiving member, and the air port is opened in the sound absorbing chamber to form the Helmholtz resonator, it is possible to manufacture the Helmholtz resonator using a simple aluminum profile or the like. it can. Moreover, since the Helmholtz resonator can be manufactured simply by fitting the resonator body material to the receiving member and attaching the small-mouth cover, it can be easily constructed and has good workability. Further, since the sound absorbing structure uses a Helmholtz resonator, a sound absorbing material such as glass wool is unnecessary.

Further, in the prior SL-receiving member, the air holes of the multiple is processed, it is possible to form the air inlet of the Helmholtz resonator by utilizing the air hole.

  Moreover, since the invention of Claim 3 is as above-mentioned, Since the said receiving member is fixed to the building skeleton side via the panel material fixed to the building skeleton side, in the location which is not provided with the flat surface. Even if it exists, since a sound absorption structure can be attached and the installation place of a sound absorption structure is not chosen, a use range can be expanded. Moreover, since it is also possible to attach a Helmholtz resonator as an accent of the panel material, the design can be improved by using the sound absorbing structure as a cosmetic material.

  Further, the invention according to claim 4 is as described above, and since the concave portion is provided on the surface of the panel material and the receiving member is fixed to the concave portion, the receiving member can be easily attached by using the concave portion as a guide. be able to.

  Further, the invention according to claim 5 is as described above, and since the leg portion is provided on the back surface of the panel material and the leg portion is brought into contact with the building housing side, the receiving member is attached to the panel material such as a screw. When stopping with a stopper, a dent can be prevented by supporting with a leg part. That is, when the panel material is recessed, there is a possibility that the resonator body material and the receiving member cannot be reliably joined, but such a phenomenon can be suppressed.

  The invention according to claim 6 is as described above, and includes a fall prevention means for directly or indirectly connecting the receiving member and the resonator body material. Even if the fitting with the member is disengaged, the resonator body material can be prevented from falling.

It is the figure which arrange | positioned the sound-absorbing structure on the ceiling and was seen from the bottom. FIG. 2 is a partially enlarged front view according to the first embodiment (a view seen from the direction A in FIG. 1, but omitting the fore cover). It is a partially expanded side view (figure seen from the B direction in FIG. 1) which concerns on 1st Embodiment. It is an exploded view of the sound absorption structure concerning a 1st embodiment. (A) (b) (c) is a figure explaining the attachment method of the fall prevention means which concerns on 1st Embodiment. It is a figure explaining the attachment method of another fall prevention means concerning a 1st embodiment. FIG. 4 is a partially enlarged front view according to the second embodiment (a view seen from the direction A in FIG. 1, but omitting the fore cover). It is a partially expanded side view (figure seen from the B direction in FIG. 1) which concerns on 2nd Embodiment. It is an exploded view of the sound absorption structure concerning a 2nd embodiment. (A) (b) (c) is a figure explaining the attachment method of the fall prevention means which concerns on 2nd Embodiment. It is a figure explaining the attachment method of another fall prevention means concerning a 2nd embodiment.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.

  The sound absorbing structure according to the present embodiment absorbs sound using a Helmholtz resonator. In the present embodiment, the sound absorbing structure is disposed on an indoor ceiling surface as shown in FIG. The sound absorbing structure includes a base material 35 fixed to the ceiling surface of the building housing 50, a panel material 38 fixed to the lower part of the base material 35, and the receiving member 10 fixed to the panel material 38 in a rib shape. And a resonator main body 20 fitted to the receiving member 10 and a fore cover 30 fixed to both ends of the resonator main body 20.

  As shown in FIGS. 2 and 3, for example, the base material 35 is fixed to the lower surface of the receiving material 39 suspended and supported by the hanger 40 from the ceiling surface of the building housing 50, and is fixed to the ceiling surface of the building housing 50. .

  The panel material 38 is an aluminum extruded shape member that forms a flat surface by being fixed to the ceiling surface of the building housing 50 via the base material 35. As shown in FIGS. It is fixed with a screw etc. in the lower part of. In the present embodiment, since the ceiling portion is covered with the panel material 38, an appearance like a spandrel is obtained when a resonator main body material 20 described later is attached.

  As shown in FIG. 2, the panel member 38 has a groove-shaped recess 38 b formed on a surface 38 a (surface on which the receiving member 10 is fixed). The recess 38b is used as a guide for fixing the receiving member 10. Further, a pair of leg portions 38 d are formed in a rib shape on the back surface 38 c (surface fixed to the base material 35) of the panel material 38, and the leg portions 38 d are in contact with the base material 35. The leg portions 38d are erected on both sides of a receiving member fixing screw 32 used for fixing the receiving member 10, and serve to receive a load when the receiving member fixing screw 32 is tightened. Yes. That is, when the receiving member fixing screw 32 is tightened, an excessive load is applied to the panel member 38 to prevent a dent phenomenon.

  As shown in FIG. 4 and the like, the receiving member 10 is a long material fixed to the flat surface of the panel material 38 described above. The receiving member 10 includes a support portion 11 that is fixed in contact with the panel member 38, a hanging portion 18 that extends substantially at right angles from both ends of the supporting portion 11, and an outer portion that extends substantially at right angles from the ends of the hanging portion 18 It is an extruded aluminum member made up of a jaw portion 19 extending in the direction and a protruding edge portion 14 formed so as to rise substantially perpendicularly from the end of the jaw portion 19.

  The support portion 11 is provided with a screw hole 13 through which the receiving member fixing screw 32 passes. By fixing the supporting portion 11 to the recess 38b and fixing with the receiving member fixing screw 32, The receiving member 10 can be fixed to the panel member 38.

  Further, an arrowhead-like locking claw 15 is formed at the outer front end portion of the protruding edge portion 14, and by engaging this locking claw 15 with a locking claw 23 of a resonator body material 20 described later. The resonator body material 20 can be fitted and fixed to the receiving member 10 with a single touch. At the base of the protruding edge 14, a step 16 is formed to receive the tip of the locking claw 23 of the resonator body material 20. The fitted and fixed resonator body 20 is fixed without rattling. It is formed so that.

  A plurality of air holes H are formed in the jaw portion 19 along the longitudinal direction of the receiving member 10. The air hole H is for forming an air port of the Helmholtz resonator in the side portion of the receiving member 10. By providing the air hole H in the jaw part 19 in this way, the air hole H opens so as to face the fixed surface (the flat surface of the panel member 38), and the air hole H is not visible from the outside. Since it is formed, the design is not impaired, and the structure is such that dust and the like are difficult to enter. In the present embodiment, the air hole H is formed only in the jaw portion 19 on one side. However, the present invention is not limited to this, and the air hole H is formed in the jaw portion 19 on both sides in order to absorb various sound ranges. May be.

  The resonator body material 20 is a long material fitted and fixed to the receiving member 10 as shown in FIG. 4 and the like, and has the same length as the receiving member 10. The resonator main body 20 is an extruded aluminum member having a front face portion 21 and side face portions 22 formed substantially at right angles from both ends of the front face portion 21 and having a substantially U-shaped cross section. An arrowhead-shaped locking claw 23 is formed on the inner side of the end portion of the side surface portion 22 and can be engaged with the locking claw 15 of the receiving member 10. Further, a rib 24 for abutting the tip of the locking claw 15 of the receiving member 10 is formed on the base side of the locking claw 23, and the locking claw is engaged with the receiving member 10. It is formed so that 15 can be prevented from entering and can be securely fixed. In addition, a lid fixing screw hole 25 is provided inside the resonator body material 20 for fixing a small-mouth cover 30 described later.

  As shown in FIG. 4 and the like, the fore cover 30 is a plate-like aluminum member fixed to both ends of the resonator body material 20. A fixing hole 30a is formed in the small mouth lid 30 so that the lid fixing screw 31 penetrated through the fixing hole 30a is screwed into the lid fixing screw hole 25 of the resonator body material 20, thereby reducing the small mouth. The lid 30 is fixed to the resonator body material 20.

In the sound absorbing structure as described above, as shown in FIGS. 2 and 3, the opening portions at both ends of the resonator body material 20 are covered with the small lid 30 and are received by the longitudinal openings of the resonator body material 20. Since the member 10 is attached, the sound absorbing chamber S shielded from the outside is formed inside the box-shaped member composed of the resonator body member 20, the small lid 30 and the receiving member 10. However, the sound absorbing chamber S is not completely shut off from the outside, and communicates with the outside through the air holes H. Specifically, as shown in FIG. 2, a gap G is formed between the flat surface of the panel member 38 and the jaw portion 19 by providing the hanging portion 18, and faces the gap G. Thus, the air hole H is opened.
Thus, according to the present embodiment, the Helmholtz resonator is configured by the sound absorption chamber S and the air hole H, and a predetermined sound absorption effect can be obtained.

  In the present embodiment, the resonator main body 20 is fixed to the receiving member 10 by engaging the locking claws 15 and 23 with each other. In the unlikely event that this engagement is disengaged, the resonator body material 20 may fall, and therefore a fall prevention means for directly or indirectly connecting the receiving member 10 and the resonator body material 20 may be provided. .

  For example, as shown in FIG. 5, a fall prevention cord 33 may be provided as a fall prevention means. The fall prevention cord 33 is provided with ring-shaped fixing portions 33a at both ends. The fixing portion 33a at one end is fixed to the small lid 30 and the fixing portion 33a at the other end is fixed to the panel member 38. The receiving member 10 and the resonator body material 20 are indirectly connected to each other (the fixing portion 33a at one end is fixed to the resonator body material 20, and the receiving member 10 and the resonator body material 20 are directly connected. When the sound absorbing structure is directly attached to a flat surface such as a wall, the fixing portion 33a at one end is fixed to the sound absorbing structure, and the fixing portion 33a at the other end is fixed to the wall or the like. It may be fixed to the flat surface of.

  The procedure for attaching the fall prevention cord 33 is as follows. That is, first, as shown in FIG. 5A, the fixing portion 33 a at one end of the fall prevention rope 33 is fixed to the rope fixing hole 30 b of the fore cover 30 by the rope fixing screw 34. Thereafter, as shown in FIG. 5 (b), the fore cover 30 is fixed to the resonator body material 20. On the other hand, the receiving member 10 is fixed to the panel material 38. Then, as shown in FIG. 5C, the resonator body material 20 is fitted and fixed to the receiving member 10, and the fixing portion 33 a at the other end of the fall prevention cable 33 is fixed to the panel material 38 by the cable fixing screw 34. To do. Thereby, since the receiving member 10 and the resonator main body material 20 are connected via the fall prevention cord 33, even if the engagement between the receiving member 10 and the resonator main body material 20 is disengaged, the resonator The main body material 20 can be prevented from falling.

  Moreover, you may employ | adopt another aspect as a fall prevention means. For example, as shown in FIG. 6, you may use the fore cover 30 as a fall prevention means. In this case, a lid fixing screw hole 17 for fixing the small lid 30 to the receiving member 10 may be provided.

  The procedure for attaching the fall prevention means is as follows. That is, first, the receiving member 10 is fixed to the panel material 38. Next, the resonator body 20 is fitted and fixed to the receiving member 10. Then, the lid fixing screw 31 inserted through the fixing hole 30a of the small lid 30 is screwed into the lid fixing screw hole 25 of the resonator body material 20, and the lid fixing screw inserted through the receiving member fixing hole 30c of the small lid 30 is provided. The screw 31 is screwed into the lid fixing screw hole 17 of the receiving member 10, and the small edge lid 30 is fixed to the receiving member 10 and the resonator body material 20. Thereby, since the receiving member 10 and the resonator main body material 20 are connected via the small-mouth cover 30, the resonator main body material 20 can be prevented from falling.

  As described above, according to the present embodiment, the receiving member 10 fixed to the ceiling surface of the building housing 50, the resonator body material 20 fitted to the receiving member 10, and the resonator body material 20 And the resonator body material 20 has a substantially U-shaped cross section, and both ends of the resonator body material 20 are covered with the mouthpiece cover 30, and the resonator Since the receiving member 10 is fitted into the longitudinal opening of the main body member 20 to form the Helmholtz resonator, the Helmholtz resonator can be manufactured using a simple aluminum shape member or the like. Moreover, since the Helmholtz resonator can be manufactured simply by fitting the resonator main body material 20 to the receiving member 10 and attaching the small mouth cover 30, it can be easily constructed and has good workability. In addition, since the sound absorbing structure uses a Helmholtz resonator, no sound absorbing material such as glass wool is required, and the recyclability is excellent.

  Further, since a plurality of air holes H are formed in the receiving member 10 along the longitudinal direction, the air holes of the Helmholtz resonator can be formed using the air holes H.

  Further, since the receiving member 10 is fixed through the panel material 38 fixed to the surface on which the base material 35 is required, the sound absorbing structure can be attached even at a location that does not have a flat surface. Since the installation location of the sound absorbing structure is not selected, the usage range can be expanded. Moreover, since it is also possible to attach a Helmholtz resonator as an accent of the panel material 38, the design can be improved by using the sound absorbing structure as a decorative material.

  Moreover, since the recessed part 38b was provided in the surface 38a of the said panel material 38, and the said receiving member 10 was fixed to the said recessed part 38b, the receiving member 10 can be easily attached by using the recessed part 38b as a guide.

  Further, since the leg portion 38d is provided on the back surface 38c of the panel material 38 and the leg portion 38d is brought into contact with the ceiling surface of the building housing 50, when the receiving member 10 is fixed to the panel material 38 with a fastener such as a screw. Further, the dent can be prevented by supporting the leg portion 38d. That is, when the panel material 38 is recessed, there is a possibility that the resonator body material 20 and the receiving member 10 cannot be reliably joined, but such a phenomenon can be suppressed.

  Moreover, since the fall prevention means which connects the said receiving member 10 and the said resonator main body material 20 directly or indirectly is provided, fitting with the resonator main body material 20 and the receiving member 10 should come off by any chance. Even so, the resonator body material 20 can be prevented from falling.

  Moreover, since the receiving member 10, the resonator main body material 20, the small mouth lid 30, the panel material 38, and the like constituting the sound absorbing structure are all made of aluminum, they can be easily recycled.

In this embodiment, the receiving member 10 is fixed via the panel material 38. However, the present invention is not limited to this, and the receiving member 10 is directly applied to a flat surface such as the wall surface of the building housing 50 without using the panel material 38. May be fixed. If it does in this way, when resonator body material 20 is attached, it can be made the appearance like a louver material. Thus, the sound absorbing structure according to the present embodiment can be constructed with the same feeling as a spandrel or louver, and the presence or absence of the panel material 38 can be selected in consideration of design.
Further, various sound ranges can be absorbed by changing the volume by increasing / decreasing the aspect ratio of the resonator body material 20 or changing the size of the air hole H.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS. Note that the basic structure of the present embodiment is the same as that of the first embodiment, and therefore, differences from the first embodiment will be described while avoiding redundant descriptions.

  As shown in FIGS. 7 to 9, the receiving member 10 according to this embodiment includes a support portion 11 that is fixed in contact with the panel member 38, and a protrusion that is formed at a substantially right angle from both ends of the support portion 11. An extruded shape member made of aluminum having a substantially U-shaped cross section constituted by the edge portion 14. The support portion 11 is formed with a convex portion 12 so as to be fitted into the concave portion 38b of the panel material 38, and a screw hole 13 through which the receiving member fixing screw 32 is penetrated. The receiving member 10 can be fixed to the panel member 38 by being fitted into the recess 38 b and fixed with the receiving member fixing screw 32. Further, an arrowhead-shaped locking claw 15 is formed at the outer front end portion of the protruding edge portion 14, and by engaging this locking claw 15 with a locking claw 23 of a resonator body material 20 described later, The resonator body material 20 can be fitted and fixed to the receiving member 10 with one touch. At the base of the protruding edge 14, a step 16 is formed to receive the tip of the locking claw 23 of the resonator body material 20. The fitted and fixed resonator body 20 is fixed without rattling. It is formed so that.

  Further, an air hole H is formed on the base side further than the step portion 16. The air hole H is for forming an air port of the Helmholtz resonator in the side portion of the receiving member 10. In the present embodiment, a plurality of air holes H are formed along the longitudinal direction only on one protruding edge 14, but the present invention is not limited thereto, and in order to absorb various sound ranges, both protruding edges An air hole H may be provided in the portion 14. As shown in FIG. 7, the air hole H opens at a position that is not covered by the side surface portion 22 of the resonator body material 20.

  In the sound absorbing structure according to the present embodiment, as shown in FIGS. 7 and 8, the opening portions at both ends of the resonator body material 20 are covered with the small lid 30, and the longitudinal opening portion of the resonator body material 20 is covered. Since the receiving member 10 is attached, the sound absorbing chamber S shielded from the outside is formed inside the box-shaped member constituted by the resonator body material 20, the small lid 30 and the receiving member 10. The sound absorbing chamber S communicates with the outside through an air hole H that opens to the protruding edge portion 14 of the receiving member 10.

  Specifically, as shown in FIG. 7, the resonator main body material 20 is fixed to the flat surface of the panel material 38 via the receiving member 10, so that the tip of the side surface portion 22 of the resonator main body material 20 is a panel. It is set so as not to contact the material 38. For this reason, a gap G is formed between the resonator body member 20 and the flat surface of the panel member 38. Since the air hole H is formed in the protruding edge portion 14 of the receiving member 10 so as to face the gap G, the air port of the Helmholtz resonator that uses the air hole H to communicate the sound absorption chamber S with the outside. Is formed.

  As described above, also in the present embodiment, the Helmholtz resonator is configured by the sound absorption chamber S and the air holes H, as in the first embodiment, so that a predetermined sound absorption effect can be obtained.

In addition, as a fall prevention means which connects the receiving member 10 and the resonator main body material 20 directly or indirectly, as shown in FIG.10 and FIG.11, apply the structure similar to 1st Embodiment. Can do.
In the second embodiment as described above, the same effect as that of the first embodiment can be obtained.

DESCRIPTION OF SYMBOLS 10 Receiving member 11 Support part 12 Convex part 13 Screw hole 14 Projection edge 15 Locking claw 16 Step part 17 Cover fixing screw hole 18 Hanging part 19 Jaw part 20 Resonator body material 21 Front part 22 Side part 23 Locking claw 24 Rib 25 Screw hole for fixing lid 30 Small lid 30a Fixing hole 30b Cable fixing hole 30c Receiving member fixing hole 31 Cover fixing screw 32 Receiving member fixing screw 33 Fall prevention cable (falling prevention means)
33a Fixing part 34 Cable fixing screw 35 Base material 36 Edge material 38 Panel material 38a Surface 38b Recess 38c Back side 38d Leg part 39 Receiving material 40 Hanger 50 Building frame H Air hole G Gap S Sound absorption chamber

Claims (6)

A sound absorbing structure using a Helmholtz resonator,
A receiving member fixed to the building frame side;
A resonator body material fitted to the receiving member;
A small lid fixed to both ends of the resonator body material;
With
The resonator body material has a substantially U-shaped cross section, covers both end openings of the resonator body material with the small lid, and fits the receiving member into the longitudinal opening of the resonator body material to absorb sound. Forming a chamber, opening an air port in the sound absorption chamber to form a Helmholtz resonator ,
The sound-absorbing structure according to claim 1, wherein a plurality of air holes for forming the air port are opened in the receiving member toward the building housing side . A sound absorbing structure using a Helmholtz resonator,
A receiving member fixed to the building frame side;
A resonator body material fitted to the receiving member;
A small lid fixed to both ends of the resonator body material;
With
The resonator body material has a substantially U-shaped cross section, covers both end openings of the resonator body material with the small lid, and fits the receiving member into the longitudinal opening of the resonator body material to absorb sound. Forming a chamber, opening an air port in the sound absorption chamber to form a Helmholtz resonator ,
The sound-absorbing structure, wherein the receiving member has a plurality of air holes for forming the air port, which are opened on the building housing side with respect to the resonator body material .   The sound absorbing structure according to claim 1, wherein the receiving member is fixed to the building skeleton side through a panel material fixed to the building skeleton side.   The sound absorbing structure according to claim 3, wherein a recess is provided on a surface of the panel material, and the receiving member is fixed to the recess.   The sound absorbing structure according to claim 3 or 4, wherein a leg portion is provided on a back surface of the panel material, and the leg portion is brought into contact with a building housing side.   The sound absorbing structure according to any one of claims 1 to 5, further comprising fall prevention means for directly or indirectly coupling the receiving member and the resonator body material.

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