JP3325498B2 - Ventilated sound insulation wall structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilated sound insulating wall structure used for an under cover of an automobile engine for absorbing and attenuating noise energy to reduce noise.

[0002]

2. Description of the Related Art Conventionally, as a noise reduction device of this type, for example, one described in Japanese Utility Model Laid-Open No. 188722/1984 is known. As shown in FIGS. 16A and 16B, the noise reduction device disclosed in this publication uses an engine a as a noise source.
The under cover c of the engine fixed to the vehicle body b is provided directly below the vehicle, so that the noise of the engine a is prevented from leaking to the outside by the under cover c of the engine.

The under cover c of the engine comprises an inner under cover e having a large number of sound absorbing holes d and an outer under cover f disposed below the inner under cover e. The inner under cover e and the outer under cover f Air layer between
Are formed.

With the above structure, the noise energy generated by the engine a is first consumed by friction with the inner peripheral surface of the sound absorbing hole d, and then the noise energy is repeatedly reflected by the air layer g to reduce the noise energy. In addition to attenuating the noise, the noise is reduced by preventing the noise from leaking outside by the outer under cover f having the closed structure.

However, in this noise reduction device, since the outer under cover f has a closed structure, the cooling air required for cooling the engine a is shut off. As a result, there is a problem that the cooling performance of the engine a is deteriorated and the engine a is overheated even though the sound insulation effect is obtained.

Further, as another conventional ventilated sound insulating wall structure 21, as described in Japanese Patent Application Laid-Open No. Hei 7-175485, according to this, as shown in FIGS. It has two or more perforated plates, a plate 22 and a lower plate 23, and a second elongated hole portion 25 provided through the perforated plate,
The sound passing through an acoustic vibration system constituted by an air mass 27 of the hole portion 24 provided in the perforated plate and an air spring 28 between the perforated plates facing the second portion; There is also a structure in which both the sound insulation effect and the air permeability are compatible by interaction with the sound passing through the air mass 26 of the long hole portion 25.

With the ventilation type sound insulation wall structure 21 configured as described above, when the incident wave x reaches the upper plate 22, a part of the incident wave x is reflected by the upper plate 22 to become a reflected wave x ', while the rest is a hole. The transmitted wave A and the transmitted wave B pass through the portion 24 and the second elongated hole portion 25, respectively, and are combined so that the transmitted wave A and the transmitted wave B reach the side opposite to the incident wave x side. Therefore, as shown in FIG. 18, the resonance frequency f1 of the acoustic vibration system by the air mass 27 formed in the hole 24 and the air spring 28 formed between the perforated plates, and the second long hole 25 The frequency region between the primary air column resonance frequencies f2 can be a region that functions as a sound insulation wall.

The ventilation type sound insulating wall structure 21 constructed as described above.
In the case of manufacturing, it is conceivable that it may be manufactured by assembling after molding in two parts by the injection method,
This injection method requires a high-precision mold, so the cost of the mold is high, and for large products, the mold becomes larger and the cost further increases. In this case, a molding method using an open mold in which the mold is opened is employed.

According to this, as shown in FIG.
At the center of the long hole 25, the perforated plate is divided into upper and lower
And the lower plate 23 are each formed by an open die, and the upper plate 2
2 and the lower plate 23 are fitted to each other with the spigot portions 25a of the second long hole portions 25 to manufacture.

[0010]

However, since the ventilation type sound insulation wall structure configured as described above is formed by a mold, it functions effectively in a target frequency range, but is not suitable for a target frequency which is slightly deviated. On the other hand, a mold had to be manufactured separately and manufactured according to the target frequency. For this purpose, a large number of molds must be prepared, which raises a cost problem.

Further, in an under cover of an automobile engine, etc., depending on a shape, a size, or an attenuation frequency region required as a sound insulation wall required for various noise countermeasures.
It is necessary to prepare many types of ventilation type sound insulation wall structures, and it is unavoidable that it is disadvantageous in terms of cost.

In consideration of the above points, the present invention is supposed to be actually used for an engine undercover of an automobile, etc., and is easy to manufacture, inexpensive, and has a high degree of freedom in design. It is an object of the present invention to provide a ventilated sound insulation wall structure that can ensure the sound quality.

[0013]

SUMMARY OF THE INVENTION To achieve this object, a ventilated sound insulating wall structure according to the present invention comprises, firstly, a pair of channel members each having a longitudinally extending band-shaped groove formed in a side wall of a pipe. It has a plurality of sound insulation wall base materials as one unit, and separates and arranges both channel shape members in a form in which the band-shaped groove portions of both channel shape members in each sound insulation wall base material are opposed to each other, and sound insulation wall base materials of different units from each other The side walls of the respective channel sections facing the band-shaped groove section are separated from each other and opposed to each other, and both end sections of both channel sections of these sound insulation wall base materials are closed with a closing member to connect all the sound insulation wall base materials, Between the two closing members, a first long hole portion which is openly communicated with the inner hole of each channel shape member by the band-shaped groove portion is formed between the two channel shape members constituting each of the sound insulating base materials, and the first long hole portions are connected to each other. A second long hole is formed between the side walls of the sound insulating wall substrate facing each other, and a sound passing through an acoustic vibration system constituted by an air mass and an air spring formed in the first long hole. The sound insulation function is provided by interaction between the air and the sound passing through the air mass formed by the second long hole.

The entire sound insulating wall substrate is disposed so that the entire both end portions of the sound insulating wall substrate draw a continuous curved shape, and the closing member is bent in the longitudinal direction so as to conform to the curved shape. It is also conceivable that both channel profiles are closed at both ends.

Secondly, the present invention has a plurality of sound insulation wall substrates each including a pair of channel members each having a band-shaped groove extending in the longitudinal direction on the side wall of the pipe. Along with disposing the two channel profiles in a form in which the band-shaped grooves of the two channel profiles face each other, separating the side walls of the channel profiles facing the band-shaped grooves in the sound insulation wall base material of different units from each other. Opposed and arranged in one frame body, a part of the side wall of the frame body closes both end openings of both channel profiles of the sound insulating wall base material, and connects all the sound insulating wall base materials, and the frame body The other portion of the side wall is separated from the side wall of the sound-insulating wall substrate facing the other portion, and both channel-shaped members forming each of the sound-insulating wall substrates are opened to the inner hole of each channel-shaped material by the band-shaped groove. First length to communicate Parts to form a, form a second long hole portions in the sound insulation wall substrate between the other parts and opposed to the side wall of the sound insulation wall substrate and between the frame adjacent phases,
A sound passing through an acoustic vibration system constituted by an air mass and an air spring formed in the first slot;
It is configured to exhibit a sound insulation function by interaction with the sound passing through the air mass formed by the long hole portion of.

Third, the present invention has a plurality of sound insulation wall base materials each including a pair of channel members each having a band-shaped groove extending in the longitudinal direction on the side wall of the pipe. Along with disposing the two channel profiles in a form in which the band-shaped grooves of the two channel profiles face each other, separating the side walls of the channel profiles facing the band-shaped grooves in the sound insulation wall base material of different units from each other. Opposed and arranged in one frame body, a part of the side wall of the frame body closes both end openings of both channel profiles of the sound insulating wall base material, and connects all the sound insulating wall base materials, and the frame body The other part of the side wall is joined to the side wall of the sound-insulating wall base material facing the same, and the channel-shaped members constituting each of the sound-insulating wall base materials are openly communicated with the inner holes of the respective channel shapes by the band-shaped grooves. The first slot Along with forming the sound insulating wall base material adjacent to each other and another part of the side wall of the frame body and the sound insulating wall base material facing each other, a second long hole is formed, and the first long hole is formed in the first long hole. The sound insulation function is exhibited by the interaction between the sound passing through the acoustic vibration system formed by the formed air mass and the air spring and the sound passing through the air mass formed by the second slot. The configuration is as follows.

[0017] The sound insulating wall base material may be arranged so that the entire both ends thereof form a continuous curved shape, or the entirety of the plurality of channel members forming the sound insulating wall base material may be bent in the longitudinal direction. It is also conceivable to configure.

Therefore, according to the present invention, the first long hole is formed by both channel members constituting each sound insulating wall base material, and the adjacent sound insulating wall base materials or other portions of the side wall of the frame body are connected to each other. A second long hole is formed between the sound insulating wall substrates facing each other, and a band-shaped groove is present in the first long hole, so that an air spring is formed.

As a result, the sound passing through the air mass formed by the second long hole and the acoustic vibration system constituted by the air mass and the air spring formed in the first long hole are passed. By interacting with the sound of the sound, it has a sound insulation effect and also secures air permeability.

The cross-sectional shape, height, width, thickness, and other dimensions of the channel member constituting the sound insulating wall base material are variously selected, and the separation distance between the sound insulating wall substrate and a pair of channel members forming the same is determined. By selecting, it is possible to cope with sound waves in a wide frequency range and increase the degree of freedom in design.Because the channel shape can be formed by extrusion, etc., it is easy to form, and the manufacturing cost is reduced while maintaining the sound insulation performance. Becomes possible.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a perspective view showing one unit of a sound insulating wall substrate according to an embodiment of the present invention. The sound insulating wall substrate 1 is composed of a pair of channel members 2 and 3. Have been. Each of the channel members 2 and 3 is basically a rectangular pipe having a substantially rectangular cross section and a long rectangular pipe, and a band-like groove 4 extending in the longitudinal direction is formed on one side wall.

The two channel members 2 and 3 are
The band-shaped grooves 4 are spaced from each other so as to face each other, and constitute one unit of the sound insulating wall substrate 1.

The two channel members 2 and 3 have the same shape and are formed in such a manner that the strip-shaped grooves 4 face each other. It is formed by molding.

FIG. 2 is a perspective view showing a sound insulating wall structure formed by using the sound insulating wall substrate 1 shown in FIG.

The sound insulation wall structure shown in FIG. 2 is constituted by using four units of the sound insulation wall base material 1. And the sound insulation wall substrate 1a
Channel member 2 facing the band-shaped groove 4 in FIG.
a and the side wall of the other channel 3b facing the band-shaped groove portion 4 in the sound insulation wall substrate 1b is spaced apart and faces,
The side wall of one channel member 2b facing the band-shaped groove 4 in the sound insulating wall base 1b and the side wall of the other channel 3c facing the band-shaped groove 4 in the sound insulating wall base 1c are spaced apart and face each other. The side wall of one channel member 2c facing the band-shaped groove portion 4 of the member 1c and the side wall of the other channel 3d facing the band-shaped groove portion 4 of the sound insulating wall base member 1c are spaced apart and opposed to each other.

The four units of the sound insulating wall substrate 1 arranged in this manner are composed of the channel members 2a, 3a, 2b, 3b, 2
A plate member 6 as a closing member is attached to each of the openings 5 at both ends of c, 3c, 2d, 3d by spot welding or the like, and the openings 5 at both ends are closed, and the sound insulating wall base materials 1a, 1b, 1 are closed.
c and 1d are connected to each other.

As a result, each of the sound insulating wall substrates 1a, 1b, 1c
Channel members 2a and 3a, 2b constituting 1d and 1d
And 3b, 2c and 3c, and 2d and 3d,
Are formed, and have first holes 7, 7,.
The sound insulating wall bases 1a and 1b, 1b and 1c, and 1c and 1d respectively form the second elongated holes 8.

The sound passing through the air mass formed by the second slot 8, the air mass formed by the first slot 7, and the air spring formed by the band-shaped groove 5. Interaction with the sound passing through the vibration system provides a sound insulation effect and ensures ventilation.

The channel members 2a, 3a, 2b, 2a, 2b,
Various dimensions such as cross-sectional shapes and thicknesses of 3b, 2c, 3c, 2d, and 3d are selected, and sound-insulating wall substrates 1a, 1b, 1c, and 1d, or a pair of channel members 2a and 3a, 2b, and 3b constituting the same. , 2c and 3c, and 2d and 3d, it is possible to deal with sound waves in a wide frequency range, increase the degree of design freedom, and increase the channel shape 2a,
Since 3a, 2b, 3b, 2c, 3c, 2d, and 3d can be formed by extrusion molding or the like, they can be easily formed, and the manufacturing cost can be reduced while maintaining sound insulation performance.

(Embodiment 2) FIG. 3 is a perspective view showing Embodiment 2 of the present invention, wherein the closing member in Embodiment 1 is formed of a flat plate-shaped plate member 6, but a cross section is shown. Plate material 6 formed by bending into a U-shape
1 and the bent portion 61a is composed of the sound insulating wall base materials 1a and 1a.
The difference is that the upper and lower wall sides of b, 1c and 1d are connected.

However, the channel members 2a, 3a, 2b,
The shapes of 3b, 2c, 3c, 2d, and 3d are the same as those in the first embodiment.
A sound insulation wall structure of a different shape is used by using the same shape as the above.

(Embodiment 3) FIG. 4 is a perspective view showing Embodiment 3 of the present invention, which is different from Embodiment 1 in that sound insulating wall substrates 1a, 1b, 1c and 1
d is disposed in a frame 9 as a closing member having a substantially rectangular shape, and one of the side walls 1 of the frame 9 facing each other.
According to 0, 10, the channel profiles 2a, 3a, 2b,
The sound-insulating wall substrates 1a, 1b, 1c and 1d are connected to each other by closing both end openings 5 of 3b, 2c, 3c, 2d and 3d, and the other side walls 11 and 11 of the frame body 9 and the channel shape. The materials 3a and 2d are arranged separately from each other,
The difference is that a second slot 8 is formed.

However, the channel members 2a, 3a, 2b,
The shapes of 3b, 2c, 3c, 2d, and 3d are the same as those in the first embodiment.
A sound insulation wall structure of a different shape is used by using the same shape as the above.

(Embodiment 4) FIG. 5 is a perspective view showing Embodiment 4 of the present invention. One of the side walls 101, 101 of Embodiment 3 is bent in a U-shape in cross section. This bent portion 101a is used as the sound insulating wall base material 1a,
The difference is that the upper and lower wall sides of 1b, 1c and 1d are connected.

However, the channel members 2a, 3a, 2b,
The shapes of 3b, 2c, 3c, 2d, and 3d are the same as those in the third embodiment.
A sound insulation wall structure of a different shape is used by using the same shape as the above.

Thus, the sound-insulating wall structure is adapted to the shape of the place to be installed.

(Fifth Embodiment) FIG. 6 is a perspective view showing a fifth embodiment of the present invention, in which each of the sound insulating wall substrates 1a, 1b, 1c and 1d of the first embodiment is shown.
The longitudinal direction of one side wall 121 is formed concave, and the other side wall 1
Although the difference is that the 22 side is formed in a convex shape, the other configuration is substantially the same as that of the first embodiment.

[0039] Thereby, it is adapted to the shape of the place where the sound insulating wall structure is installed.

(Embodiment 6) FIG. 7 is a perspective view showing Embodiment 6 of the present invention, and each of the sound insulating wall substrates 1a, 1b, 1c and 1d of Embodiment 1.
The other configuration is substantially the same as that of the first embodiment, except that it is formed in a convex curved shape from the lower wall 131 side to the upper wall 132 side.

Thus, the shape of the place where the sound insulation wall structure is to be mounted is adapted.

(Seventh Embodiment) FIG. 8 is a perspective view showing a seventh embodiment of the present invention. As a modification of the sixth embodiment, the sound insulating wall substrate 1a is
b, 1c and 1d so as to gradually incline one end,
The portion indicated by the one-dot chain line is cut out, thereby adapting to the shape of the place where the sound insulation wall structure is to be installed.

(Eighth Embodiment) FIG. 9 is a perspective view showing an eighth embodiment of the present invention. The main configuration is substantially the same as that of the first embodiment shown in FIG. Each of the channel members 2a, 3a, 2b, and 3b is composed of two pairs of sound insulating wall substrates including a sound insulating wall substrate 1a formed by the members 2a and 3a and a sound insulating wall substrate 1b formed by the channel members 2b and 3b. Are designed to be curved in the longitudinal direction of each other so as to conform to the shape of the place where the sound insulation wall structure is to be installed, and to efficiently increase the sound insulation effect.

Ninth Embodiment FIG. 10 is a perspective view showing a ninth embodiment of the present invention.
The main structure is substantially the same as that of the third embodiment shown in FIG. 4, but the channel shapes 2a and 3a, 2b and 3b,
The sound insulating wall substrates 1a, 1b, 1c and 1d are respectively formed in such a manner that 2c and 3c and 2d and 3d are shifted from each other in the vertical direction.
1b, 1c and 1d are characterized in that one of both ends is arranged so as to be formed in a continuous curved shape in which a longitudinal central portion is concave and the other is convex.
Fits the shape of the place where the sound insulating wall structure is installed, efficiently,
It is intended to provide sound insulation.

(Embodiment 10) FIG. 11 is a partially cutaway front view showing Embodiment 10 of the present invention, and shows sound insulating wall substrates 1a, 1b, 1c and 1d.
Are arranged in the frame body 9 in the same manner as in the second embodiment. However, the sound insulating wall base materials 1a, 1b, 1c and 1d respectively have channel profiles 2a and 3a, 2b and 3b, 2c and 3
The channel shape formed by c and 2d and 3d is formed smaller in order, and the shape of the frame 9 is matched to the dimensions of the sound insulating wall substrate 1a formed by the channel members 2a and 3a.

This means that the sound insulating wall substrates 1a, 1b, 1c
When the upper surfaces of the sound insulating wall bases 1b, 1c and 1d are aligned with the lower surfaces of
A gap is left between the lower end and the lower end of the channel. This is because the channel shape is selected in combination with each frequency characteristic in order to prevent noise.

As a result of this configuration, each sound insulating wall substrate 1
a, 1b, 1c and 1d can deal with sound waves in different frequency ranges, and have a wide range of frequency characteristics.

(Embodiment 11) FIG. 12 is a partially cutaway perspective view showing Embodiment 11 of the present invention, and shows channel profiles 2a, 3a, 2b, 3
It is characterized in that b, 3c, 3c, 2d and 3d are respectively formed by elliptical pipes. As a result, the first elongated holes 7, 7... and the sound insulating wall base materials 1a and 1b, 1b and 1c, and The second elongated holes 8, 8 formed by 1c and 1d are formed.
Both open ends have a throat shape to form an air rectifying portion.

That is, for example, the air flow A directly directed to the second long hole 8 naturally passes directly through the first long hole 7 and is discharged downward. On the other hand, the air flow B colliding with the upper wall surface of the channel member 2b or 3b is slid along the wall surface by the air rectification unit, passes through the first long hole portion 7, and is discharged downward. It will be.

As a result, the airflow B passing through the first long hole 7 slides on the wall surface of the first long hole 7 so that
So that the so-called peeling phenomenon which does not slide on the wall surface can be suppressed. 4 can suppress the occurrence of the whistling sound.

As the channel members 2 and 3, circular pipes may be used. Alternatively, as shown in FIG. 13A, square pipes having rounded corners may be used.
Further, as shown in FIG. 13 (b), it is conceivable to adopt a shape in which the tips of the band-shaped grooves 4, 4 of the channel members 2 and 3 shown in FIG.

(Twelfth Embodiment) FIG. 14 is a perspective view showing a twelfth embodiment of the present invention, in which each of the sound insulating wall substrates 1a, 1b, 1c and 1d according to the first embodiment is centered on a longitudinal axis. This feature is characterized by the fact that it is placed at an angle equal to the angle at which the field of view from outside the sound insulation wall is secured from the direction parallel to the angle of inclination, and the field of view from the rest is shielded. Thus, it can be suitably used for a shielding wall or the like installed on the shoulder of a road.

(Thirteenth Embodiment) FIG. 15 is a perspective view showing a thirteenth embodiment of the present invention. In the second embodiment, the first long hole formed by the sound insulating wall bases 1b, 1c and 1d. 7 and second long hole 8
, That is, a portion close to the sound source, is shielded by the shielding plate 15, and is intended to further improve the sound insulation effect.

In the above-described embodiment, the engine undercover for an automobile has been described as an example. However, the present invention is not limited to this. For example, ventilation and sound insulation such as a sound insulation wall of a building or a road having a larger area can be used. It can be used for all objects that require.

[0055]

As described above, according to the present invention, each sound-insulating wall substrate is constituted by a pair of channel members made of a square, elliptical or round pipe, and the first elongated holes are formed between the channel members. While forming, a second long hole portion is formed by adjacent sound insulation wall base materials or another portion of the side wall of the frame and the sound insulation wall base material opposed thereto, and the first long hole portion is formed by: Due to the presence of the band-shaped groove, an air spring is formed. As a result, the sound passing through the air mass formed by the second long hole, the air mass of the first long hole, and the air spring are used. Interaction with the sound passing through the constructed acoustic vibration system provides a sound insulation effect and ensures ventilation.

The cross-sectional shape, height, width, thickness, and other dimensions of the channel material constituting the sound insulating wall base material are variously selected, and the separation distance between the sound insulating wall base material and a pair of channel shape materials constituting the same is determined. By selecting, it is possible to cope with sound waves in a wide frequency range, and from the large sound insulation wall to the small sound insulation wall, it is possible to obtain a sound insulation wall that is optimal for the size of the noise source. , Because it can be formed by extrusion molding, etc.
The production cost can be reduced while maintaining the sound insulation performance.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one unit of a sound insulating wall substrate according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a first embodiment of a sound insulation wall structure configured using the sound insulation wall substrate 1 shown in FIG.

FIG. 3 is a partially cutaway perspective view showing Embodiment 2 of the present invention.

FIG. 4 is a partially cutaway perspective view showing Embodiment 3 of the present invention.

FIG. 5 is a partially cutaway perspective view showing Embodiment 4 of the present invention.

FIG. 6 is a partially cutaway perspective view showing a fifth embodiment of the present invention.

FIG. 7 is a partially cutaway perspective view showing Embodiment 6 of the present invention.

FIG. 8 is a partially cutaway perspective view showing a seventh embodiment of the present invention.

FIG. 9 is a partially cutaway perspective view showing an eighth embodiment of the present invention.

FIG. 10 is a partially cutaway perspective view showing a ninth embodiment of the present invention.

FIG. 11 is a partially cutaway front view showing the tenth embodiment of the present invention.

FIG. 12 (a) is a partially cutaway perspective view showing Embodiment 11 of the present invention. (B) It is a front view which expands and shows the principal part.

13 (a) and (b) are front views of a sound insulating wall substrate showing a modification of the eleventh embodiment shown in FIG.

FIG. 14 is a partially cutaway perspective view showing a twelfth embodiment of the present invention.

FIG. 15 is a partially cutaway perspective view showing a thirteenth embodiment of the present invention.

FIG. 16A is an explanatory view showing a conventional engine noise reduction device. (B) It is a perspective view of the noise reduction device.

FIG. 17A is a perspective view of a conventional ventilation type sound insulation structure. (B) It is explanatory drawing which shows the mechanism of the ventilation type sound insulation structure.

FIG. 18 is a diagram showing an example in which the sound insulating effect of the ventilation type sound insulating structure is reduced.

FIG. 19 is a cross-sectional view of a welding structure of a second long hole of the ventilation type sound insulating wall structure.

[Explanation of symbols]

 1, 1a, 1b, 1c, 1d Single sound-insulating wall base material 2, 2a, 2b, 2c, 2d Channel profile 3, 3a, 3b, 3c, 3d Channel profile 4 Band-shaped groove 5 Opening at both ends 6, 61 Plate (Closing member) 7 First long hole 8 Second long hole 9 Frame (closing member) 10 One side wall 11 The other side wall 15 Shield plate

Continuing on the front page (72) Inventor Isao Satsukawa 19-1 Gomishima, Fuji-shi, Shizuoka Prefecture Inside Yamakawa Kogyo Co., Ltd. (72) Inventor Keijiro Tsuruga 2 Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Nissan Motor Co., Ltd. (72 Inventor Yasuyuki Asahara 2 Nissan Motor Co., Ltd., 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture (72) Inventor Yuji Shinbo 2 Nissan Motor Co., Ltd., 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture (56) References 9-25671 (JP, A) JP-A-6-129029 (JP, A) JP-A-6-146431 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G10K 11/16 B60R 13/08 E04B 1/86

Claims (12)

(57) [Claims] 1. A plurality of sound insulation wall substrates each including a pair of channel shapes each having a band-like groove extending in a longitudinal direction formed on a side wall of a pipe. The two channel-shaped members are spaced apart from each other with the band-shaped grooves facing each other, and the side walls of the channel-shaped members facing the band-shaped grooves in the sound insulating wall base material of different units are separated from each other and face each other. Both ends of both channel sections of the material are closed by closing members to connect the entire sound insulating wall base material, and between the closing members, the band-shaped groove portions are formed by the two channel members forming each of the sound insulating base materials. Forming a first long hole portion that is in open communication with the inner hole of each channel shape member, and forming a second long hole portion between the side walls of the sound insulating wall base material that are separated and opposed to each other;
A sound passing through an acoustic vibration system constituted by an air mass and an air spring formed in the first slot;
A ventilation type sound insulation wall structure characterized by exhibiting a sound insulation function by interaction with a sound passing through an air mass formed by a long hole portion of the ventilation hole. 2. The sound barrier base material according to claim 1, wherein both end portions of the sound insulation wall base material are continuously arranged in a curved shape, and the closing member is bent in a longitudinal direction so as to match the curved shape. 2. The ventilated sound insulating wall structure according to claim 1, wherein both end openings of both channel members are closed. 3. A plurality of sound insulation wall substrates each including a pair of channel shapes each having a band-shaped groove extending in a longitudinal direction formed on a side wall of a pipe, and each of the sound insulation wall substrates has a plurality of sound insulation wall substrates. Along with disposing the two channel profiles in a form in which the band-shaped grooves face each other, the side walls of the respective channel profiles facing the band-shaped grooves in the sound insulation wall base material of different units are separated from each other and face each other. It is arranged in a frame, and both end portions of both channel sections of the sound insulating wall base material are closed by a part of the side wall of the frame body to connect all the sound insulating wall base materials and other portions of the side wall of the frame body And a side wall of the sound insulation wall substrate facing the first space member, and a first long opening communicating with the inner hole of each channel shape member by the band-shaped groove portion between the two channel shape members constituting each of the sound insulation wall base materials. When the hole is formed A second long hole is formed between adjacent sound insulating wall base materials and another portion of the side wall of the frame body and the sound insulating wall base materials opposed to each other, and is formed in the first long hole portion. The sound insulation function is provided by the interaction between the sound passing through the acoustic vibration system constituted by the air mass and the air spring and the sound passing through the air mass formed by the second slot. A ventilated sound-insulating wall structure. 4. A plurality of sound-insulating wall bases each including a pair of channel-shaped members each having a band-shaped groove extending in a longitudinal direction formed in a side wall of a pipe, and each of the sound-insulating wall bases has a plurality of sound insulating wall bases. Along with disposing the two channel profiles in a form in which the band-shaped grooves face each other, the side walls of the respective channel profiles facing the band-shaped grooves in the sound insulation wall base material of different units are separated from each other and face each other. It is arranged in a frame, and both end portions of both channel sections of the sound insulating wall base material are closed by a part of the side wall of the frame body to connect all the sound insulating wall base materials and other portions of the side wall of the frame body And a side wall of the sound insulating wall base material opposed thereto, and a first elongated hole that is openly communicated with the inner hole of each channel shaped material by the band-shaped groove portion between the two channel shaped materials constituting each of the sound insulating wall base materials. Forming a part, A second elongated hole is formed between adjacent sound insulating wall substrates and other portions of the side wall of the frame and the opposite sound insulating wall substrates, and an air mass formed in the first elongated hole is formed. The sound passing through the acoustic vibration system constituted by the air and the air spring and the sound passing through the air mass formed by the second elongated hole portion are provided so as to exhibit a sound insulation function. The ventilation type sound insulation wall structure characterized by the above. 5. The ventilation type sound insulation wall structure according to claim 3, wherein the sound insulation wall base material is arranged so that both end portions as a whole form a continuous curved shape. 6. The ventilation type sound insulating wall structure according to claim 1, wherein the whole of the plurality of channel members forming the sound insulating wall substrate is curved in a longitudinal direction. 7. The sound-absorbing member according to claim 1, wherein the closing member is bent in a U-shaped cross section, and the bent portion connects the upper and lower walls of the sound insulating wall base material. Or the ventilation type sound insulation wall structure of 4. 8. The ventilation type sound insulation wall structure according to claim 1, wherein said sound insulation wall base material is arranged to be inclined at a predetermined angle about its longitudinal axis. 9. The ventilation type sound insulation wall structure according to claim 5, wherein a part of the first long hole and the second long hole is shielded by a shielding plate. 10. The ventilation type sound insulation wall structure according to claim 6, wherein a part of the first elongated hole and the second elongated hole is shielded by a shielding plate. 11. The ventilation type sound insulation wall structure according to claim 5, wherein said sound insulation wall base material is arranged to be inclined at a predetermined angle about a longitudinal axis thereof. 12. The ventilation type sound insulation wall structure according to claim 6, wherein said sound insulation wall base material is arranged to be inclined at a predetermined angle about its longitudinal axis.