JP2015123783A - Vehicle interior noise propagation prevention structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an in-cabin permeation noise prevention structure which can prevent that permeation noise propagated in a cabin while permeating a floor panel is propagated to ears of an occupant of an automobile.SOLUTION: An in-cabin noise propagation prevention structure 2 prevents that permeation noise S1 is propagated to ears E1 of an occupant O1 while permeating a floor panel 100 of an automobile, and progressing to a direction orthogonal to a line component which connects minimum opposing distance portions of cabin constituent members (10, 12) through a clearance between the opposing cabin constituent members (10, 12). New minimum opposing distance constituent parts (18, 20) newly constituting the minimum opposing distance portions are arranged so that the permeation noise S1 is deviated from a direction in which the permeation noise progresses to the ears of the occupant O1.

Description

  The present invention relates to a structure for preventing transmitted noise propagation in a vehicle interior of a vehicle, and in particular, is generated from a road surface or the like and passes through a vehicle floor panel and passes between facing vehicle compartment components such as a center console and a seat seat. The present invention relates to a vehicle interior noise propagation prevention structure for preventing transmission of transmitted noise transmitted to a person's ear.

  The body of an automobile is composed of a relatively thin steel plate panel because it is excellent in weight reduction and welding assembly workability, and it is easy to transmit vibration, and noise due to this becomes a problem. Therefore, for example, Patent Literature 1 and Patent Literature 2 disclose vibration suppression and sound insulation structures for preventing noise due to this vibration.

  Patent Document 1 discloses a technique for suppressing vibration of a floor panel by attaching a damping material such as a melt sheet to the floor panel. Further, Patent Document 2 discloses a floor carpet composed of a carpet layer and a molded urethane layer integrally formed on the back surface of the carpet layer, and has a high porosity or low compression between the back surface of the molded urethane layer and the floor panel. A structure is described in which vibration transmission from the floor panel side is reduced by laying on the floor panel with an elastic filler interposed.

Japanese Patent Laid-Open No. 7-181979 JP-A-9-95168

  Each of the techniques described in Patent Documents 1 and 2 focuses on preventing noise caused by vibrations by suppressing vibrations transmitted in vehicle body components such as a floor panel. However, in a vehicle, in addition to the noise caused by the transmission of vibrations because the vehicle body component itself becomes a sound wave transmission medium, the noise itself generated from the noise source passes through the vehicle body component itself such as the floor panel. As a result, there is transmitted noise that is directly transmitted to the passenger's ear.

  For example, when the vehicle is strongly accelerated or suddenly stopped, high energy transmitted noise (transmitted noise with high frequency or sound pressure) is generated between the road surface and the tire. In this case, the generated transmitted noise is generated on the floor panel. Is transmitted through the vehicle interior.

  This type of transmitted noise is particularly strong in directivity, propagates into the passenger compartment and propagates to the passenger's ear through the gap between the passenger compartment components such as between the side of the center console and the side of the seat, The passenger will be uncomfortable.

  Under the intensive study of the present inventors, it has been discovered that this type of transmitted noise is directed in a direction perpendicular to the line segment connecting the minimum facing distance portions between the facing vehicle compartment components. Therefore, when there is a passenger's ear in this direction, the transmitted noise is transmitted to the passenger, and the comfort of the passenger is impaired.

  In this way, sound with high directivity that has passed through the vehicle body components travels through even if a damping member is provided as in the prior art, and thus the transmitted noise reduction effect by the damping member is reduced. There was a problem that could hardly be obtained.

  The present invention has been made in view of such a problem, and an object of the present invention is to prevent transmission noise transmitted through the floor panel and traveling into the vehicle interior from being propagated to the ears of the automobile passenger. It is an object of the present invention to provide a vehicle interior transmitted noise prevention structure that can be used.

  In order to achieve the above object, a vehicle interior noise propagation preventing structure according to claim 1 is a line that passes through a floor panel of an automobile and connects a minimum facing distance portion of the vehicle compartment constituent member between opposing vehicle compartment constituent members. It is a vehicle interior noise propagation prevention structure that prevents transmitted noise propagated to the passenger's ear by traveling in a direction orthogonal to the minute, so as to divert the transmitted noise from the direction of traveling to the passenger's ear, A new minimum counter distance component that constitutes the new minimum counter distance portion is provided.

  According to a second aspect of the present invention, in the vehicle interior noise propagation preventing structure according to the first aspect, the new minimum facing distance constituting portion is provided on at least one of the mutually facing surfaces of the facing compartment constituting members. It is a protrusion.

  Furthermore, the invention according to claim 3 is the vehicle interior noise propagation preventing structure according to claim 1, wherein the new minimum facing distance constituting portion is provided on at least one of the mutually facing surfaces of the facing compartment constituting members. It is a dent.

  According to a fourth aspect of the present invention, in the vehicle interior noise propagation preventing structure according to any one of the first to third aspects, the transmitted noise is changed in the traveling direction of the transmitted noise changed by the new minimum facing distance component. A sound absorbing means is provided.

  And the invention which concerns on Claim 5 WHEREIN: In the vehicle interior noise propagation prevention structure of any one of Claims 1-4, the said vehicle interior structural member which opposes is a seat part of a center console and a seat, respectively. It is characterized by being.

  Further, the invention according to claim 6 is the vehicle interior noise propagation preventing structure according to any one of claims 1 to 4, wherein the opposing vehicle interior structural members are respectively a B pillar and a seat portion of a seat. It is characterized by being.

  The invention according to claim 7 is the vehicle interior noise propagation preventing structure according to any one of claims 1 to 4, wherein the opposing vehicle interior structural members are a door seat and a seat seat, respectively. It is characterized by that.

  According to the first aspect of the present invention, as described above, the transmitted noise that is caused by factors such as friction between the road surface and the tire and reaches the ears of the passenger via the floor panel is the minimum facing distance between the passenger compartment components. However, the portion of the passenger compartment component that constitutes the minimum opposing distance is changed by the new minimum opposing distance constituent portion provided in the passenger compartment constituent member. It will be.

  Therefore, since the direction of the line connecting the minimum facing distance portion is also changed, according to the knowledge that "the transmitted noise travels in a direction orthogonal to the line segment connecting the minimum facing distance portion between the constituent members", the above The traveling direction of the transmitted noise is changed to a direction orthogonal to the direction of the line connecting the newly configured new minimum facing distance components (hereinafter also referred to as the transmitted noise traveling direction after the change). . Then, the transmitted noise traveling direction after the change is deviated from the direction of traveling to the passenger's ear, so that the transmitted noise is prevented from being uncomfortable by reaching the passenger's ear. be able to.

  According to the invention of claim 2, the new minimum facing distance constituent portion between the compartment constituent members is configured as a protrusion provided on at least one of the mutually facing surfaces of the opposing compartment constituent members. . That is, the new minimum facing distance constituent part is configured by the protrusion provided on one of the compartment constituent members and the other compartment constituent member (or the protrusion provided on the other compartment constituent member). It will be. Accordingly, the minimum facing distance portion is shifted from the original position with a very simple configuration. In particular, by changing the arrangement position and shape of the protrusions in the vehicle body constituent member, it is possible to arbitrarily adjust the traveling direction of the transmitted noise as long as the transmitted noise is not transmitted to the passenger's ear.

  Furthermore, according to the invention which concerns on Claim 3, the said new minimum facing distance structure part is comprised as a dent part provided in the at least one of the mutually opposing surface of the said vehicle interior structural member which opposes. According to this, the minimum facing distance portion is shifted from the original position with a simple configuration in which the recessed portion is provided on at least one of the mutually facing surfaces of the vehicle interior structural member. In particular, by changing the arrangement position, shape, depth, width, and the like of the recess, it is possible to arbitrarily adjust the traveling direction of the transmitted noise as long as the transmitted noise is not transmitted to the passenger's ear. .

  Further, according to the invention according to claim 4, sound absorption by the sound absorbing means can be performed on the extension line of the traveling direction of the sound whose traveling direction is shifted by the new minimum facing distance constituent portion between the cabin structural members. It is possible to prevent an increase in the level of transmitted noise due to reflection or interference of the sound whose traveling direction is shifted in the passenger compartment.

  Further, according to the inventions according to claims 5 to 7, between the center console and the seat portion of the seat, the B pillar and the seat portion, and the door and the seat portion, through which the transmitted noise from the floor panel easily passes. On the other hand, the vehicle interior noise propagation preventing structure according to the present invention is applied. That is, the transmitted noise propagating through the various passenger compartment components can be diverted from the passenger's ear.

It is a figure explaining 1st Embodiment of the vehicle interior noise propagation prevention structure which concerns on this invention. It is a principal part enlarged view in the vehicle interior noise propagation prevention structure of FIG. It is a figure explaining 2nd Embodiment of the vehicle interior noise propagation prevention structure which concerns on this invention. It is a figure explaining 3rd Embodiment of the vehicle interior noise propagation prevention structure which concerns on this invention. It is a figure explaining 4th Embodiment of the vehicle interior noise propagation prevention structure which concerns on this invention. It is a figure explaining 5th Embodiment of the vehicle interior noise propagation prevention structure which concerns on this invention.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is an explanatory view showing a state in which the vehicle interior noise propagation preventing structure according to the first embodiment is applied to the interior of an automobile, and FIG. 2 is a vehicle interior shown by a broken circle in FIG. It is a principal part enlarged view of the noise propagation prevention structure.

  The vehicle interior noise propagation preventing structure 2 according to the present embodiment prevents transmitted noise S1 generated due to friction between a road surface and a tire (not shown) when the vehicle suddenly starts or accelerates from propagating to the ear E1 of the passenger O1. Is.

  First, as shown in FIG. 1, a driver's seat 10 and a passenger seat 12 on which a passenger O1 is seated are installed in a passenger compartment 1, and a space between the driver's seat 10 and the passenger seat 12 is provided. The center console 14 is arranged on the floor panel 100 at the position. Here, in the present embodiment, it is assumed that the passenger seat part 16 of the passenger seat 12 and the center console 14 face each other.

  And the space | interval between the console side surface 16a of the passenger seat part 16 of the passenger seat 12 and the passenger seat side surface 14a of the center console 14 becomes a structure which becomes narrow gradually as it goes upwards. Therefore, the portion of the line segment L1 connecting the upper position T1 of the passenger side surface 14a and the upper position T2 of the console side surface 16a originally constitutes the minimum facing distance between the passenger seat 16 and the center console 14. Is.

  On the other hand, in the present embodiment, the first protrusion 18 is provided on the passenger seat side surface 14a of the center console 14 as a new minimum facing distance component between the passenger seat 16 and the center console 14. The second protrusion 20 is provided on the console side surface 16 a of the passenger seat 16.

  The first protrusion 18 and the second protrusion 20 are the distance between the first protrusion tip 18a of the first protrusion 18 and the second protrusion tip 20a of the second protrusion 20 (that is, the length of the line segment L2 in the figure). ) Is shorter than the length of the line segment L1 (that is, the minimum facing distance between the passenger seat 16 and the center console 14 in the absence of the protrusions 18 and 20), and the protrusions 18 and 20 respectively. The shapes, heights, and arrangement positions of the protrusions 18 and 20 are adjusted so that the ear E1 of the passenger O1 does not exist in the direction orthogonal to the line segment L2 connecting the first protrusion tips 18a and 20a. .

  The transmitted noise S1 that reaches the ear E1 of the passenger O1 via the floor panel 100 is originally a direction orthogonal to the line segment L1 representing the minimum facing distance between the passenger seat 16 and the center console 14, and more specifically. Travels along a direction perpendicular to the plane containing the line segment L1 (see the dashed arrows in FIGS. 1 and 2).

  However, according to the above configuration, the portion of the line segment L2 is made the new minimum counter distance by the first protrusion 18 and the second protrusion 20 configured as the new minimum counter distance component between the passenger seat 16 and the center console 14. It will be changed as a part. Therefore, the traveling direction of the transmitted noise S1 is changed to a direction orthogonal to the direction of the line segment L2, more specifically, a direction orthogonal to the plane including the line segment L2 (the direction of the solid line arrow in FIGS. 1 and 2). The Rukoto. Then, the transmitted noise S1 after the traveling direction is changed deviates from the direction toward the ear E1 of the rider O1, so that the transmitted noise S1 reaches the rider O1's ear and is uncomfortable for the rider O1. Can be prevented.

  Furthermore, in the present embodiment, the first protrusion 18 and the second protrusion 20 are provided on the passenger side surface 14a of the center console 14 and the console side surface 16a of the passenger seat 16 respectively. It should be noted that it is possible to deviate the traveling direction of the transmitted noise S1 by newly configuring a minimum facing distance portion between them.

  Further, by adjusting the arrangement position of the first protrusion 18 and the second protrusion 20 on the passenger side surface 14a or the console side surface 16a and changing the shape of the protrusion, the minimum facing distance portion is adjusted. It is also possible to arbitrarily adjust the traveling direction of the transmitted noise S1 as long as the transmitted noise is not transmitted to the ear E1 of the passenger O1.

  The first protrusion 18 and the second protrusion 20 may be integrally formed with the console side surface 16a of the passenger seat 16 and the passenger side surface 14a of the center console 14, respectively. It may be configured to be adhesively bonded by a desired means.

  Further, the first protrusion 18 and the second protrusion 20 have a shape extending over the entire extending direction in the vehicle body front-rear direction of the console side surface 16 a of the passenger seat 16 and the passenger side surface 14 a of the center console 14. Alternatively, the shape may extend over a part of the vehicle body longitudinal direction. In other words, any shape that can be assumed by those skilled in the art can be used as long as the shape fulfills the function of changing the direction of the transmitted noise S1 traveling toward the ear E1 of the passenger O1.

(Second Embodiment)
FIG. 3 is an explanatory diagram of the vehicle interior noise propagation preventing structure 2 according to the second embodiment. In addition, the same code | symbol is attached | subjected to the element similar to 1st Embodiment, and the description is abbreviate | omitted. In the present embodiment, the third protrusion 22 is also provided on the console side surface 30a on the center console 14 side of the driver seat portion 30 of the driver seat 10 as the new minimum facing distance constituent portion. A fourth protrusion 24 is also provided on the side surface 14 on the driver seat 30 side. Similar to the first protrusion 18 and the second protrusion 20, the third protrusion 22 and the fourth protrusion 24 are generated from the road surface or the like and go straight to the ear E2 of the passenger O2 in the passenger seat via the floor panel 100. The transmitted noise S2 is provided in a manner that can be shifted from the ear E2 of the passenger O2. In other words, the third protrusions 22 and the fourth protrusions 24 are provided in a shape and arrangement that are substantially mirror images of the first protrusion 18 and the second protrusion 20 and the center console 14.

  Therefore, in the vehicle interior noise propagation preventing structure 2 according to the present embodiment, not only the transmitted noise S1 reaching the passenger O1's ear from the floor panel 100 is diverted from the ear of the passenger O1, but the floor panel is also operated according to the same principle. The transmitted noise S2 reaching from 100 to the passenger O2's ear of the passenger seat 12 can also be deviated from the ear of the passenger O2.

  Further, in the present embodiment, sound absorbing materials 32 and 34 for absorbing the transmission noise S1 and the transmission noise S2 whose traveling directions are changed are provided on the vehicle interior ceiling surface 36, respectively. Specifically, the sound absorbing material 32 is located on a line extending in the traveling direction of the transmitted noise S1 that travels in a direction perpendicular to the line segment L2 connecting the first protrusion tip 18a of the first protrusion 18 and the tip 22a of the second protrusion 22. The sound absorbing material 34 travels in a direction perpendicular to the line segment L3 connecting the tip 22a of the third protrusion 22 and the tip of the fourth protrusion 24a of the fourth protrusion 24. It arrange | positions at the vehicle interior ceiling surface 36 so that it may be located on the advancing direction extension line | wire of the transmitted noise S2.

  The sound absorbing materials 32 and 34 can be formed of various materials having desired sound absorbing characteristics such as glass wool, coarse wool felt, synthetic fiber material, urethane material, wool material, or any porous material. In addition, it can be formed in a desired shape according to the shape of the passenger compartment ceiling surface 36 or the like. In addition, as a method of coupling the sound absorbing materials 32 and 34 to the passenger compartment ceiling surface 36, any method that can be adopted by those skilled in the art can be used.

  As described above, by providing the sound absorbing materials 32 and 34 on the passenger compartment ceiling surface 36 on the extension direction of the transmitted noises S1 and S2, respectively, they are deviated from the ears of the passenger O1 and the passenger O2. The transmitted noises S1 and S2 are absorbed by the sound absorbing materials 32 and 34, respectively.

  Therefore, the transmitted noises S1 and S2 deviated from the ears of the passenger O1 and the passenger O2 are reflected on the inner surface of the vehicle interior ceiling surface 36 and the like and transmitted again to the passenger O1 and the passenger O2. Can be prevented.

  In particular, if no measures are taken against the transmitted noise S1 and S2 reflected by the vehicle interior ceiling surface 36, etc., the reflected transmitted noise S1 and S2 are further reflected or diffracted in the vehicle interior. Therefore, there is a possibility that the sound pressure level of the transmitted noise increases due to interference with sound waves emitted from other sound sources. However, this phenomenon is prevented by the configuration according to the present embodiment, and the passenger O1 And the comfort of O2 can be made better.

(Third embodiment)
As shown in FIG. 4, in the vehicle interior noise propagation preventing structure 2 according to the present embodiment, the projection according to the first embodiment or the second embodiment is used as a new minimum facing distance constituent portion between the compartment constituent members. Instead of 18a and the like, a notch-shaped recess 40 is provided on the console side surface 16a of the passenger seat 16.

  In the present embodiment, by providing the recess 40, the portion of the minimum facing distance determined between the passenger side surface 14a of the center console 14 and the console side surface 16a of the passenger seat 16 is the original. The line segment L4 is displaced from the line segment L4 and connects the point T3 on the console side surface 16a and the edge T4 of the recess 40. Accordingly, the transmitted noise S1 travels in a direction orthogonal to the line segment L5 and is absorbed by the sound absorbing material 32.

  According to the vehicle interior noise propagation preventing structure 2 according to the present embodiment, the portion that originally formed the minimum facing distance determined on the passenger side surface 14a of the center console 14 and the console side surface 16a of the passenger seat 16 The line segment L4 is formed with the recess 40 on the console side surface 16a, so that the line segment L4 is shifted from the original position to the line segment L5, and as a result, the direction in which the transmitted noise S1 advances is changed. Become. That is, it is possible to obtain an effect of diverting the traveling direction of the transmitted noise S1 from the ear E1 of the rider O1 with a very simple configuration in which the recess 40 is provided on the console side surface 16a. In particular, by changing the arrangement position, shape, depth, width, extension length in the longitudinal direction of the vehicle body, and the like, the minimum facing distance portion is adjusted and transmitted to the ear E1 of the passenger O1. The traveling direction of the transmitted noise S1 can be arbitrarily adjusted within a range where noise is not transmitted.

(Fourth embodiment)
As shown in FIG. 5, in the vehicle interior noise propagation preventing structure 2 according to the present embodiment, as in the first embodiment, the first protrusion 18 and the second protrusion 18 are used as the new minimum facing distance components between the vehicle interior components. The protrusion 20 is employed, and a transmitted noise absorbing portion 42 is formed on the console side surface 16a of the passenger seat 16 as a unique configuration according to the present embodiment. The transmitted noise absorbing portion 42 is configured by forming a notch-like portion of the passenger seat portion 16 with a material having an arbitrary high sound absorption characteristic such as a porous material.

  In the present embodiment, the transmitted noise is absorbed particularly on the extended line in the direction perpendicular to the line segment L6 connecting the first protrusion tip 18a of the first protrusion 18 and the second protrusion tip 20a of the second protrusion 20. The part 42 is adjusted to be positioned. In particular, this adjustment is realized by shifting the arrangement height positions of the first protrusion 18 and the second protrusion 20 as is apparent from the drawing. That is, by providing the first projecting portion 18 at a position higher than the second projecting portion 20, the line segment L6 is inclined at a certain angle from the horizontal and is lowered to the right in the figure. The transmitted noise absorbing portion 42 is present on the extended line in the upward direction.

  According to the above configuration, the transmitted noise S1 traveling in the direction orthogonal to the line segment L6 is absorbed by the transmitted noise absorbing portion 42. Therefore, the transmitted noise S1 that should originally be transmitted to the ear E1 of the passenger O1 is shifted in the traveling direction so as not to be transmitted to the ear E1 of the passenger O1, while the transmitted noise S1 is transmitted to the passenger compartment O1. The sound can be absorbed by the transmission noise absorbing portion 42 relatively below. As a result, the traveling distance of the transmitted noise S1 whose traveling direction has been changed in the passenger compartment 1 can be shortened as much as possible. Therefore, the transmitted noise S1 after the traveling direction has been changed is emitted from another sound source in the passenger compartment. Phenomenon such as interference with other traveling sound and strengthening can be prevented more suitably, and as a result, it contributes to further reduction of transmitted noise in the passenger compartment.

(Fifth embodiment)
In the present embodiment, as shown in FIG. 6, the vehicle interior noise propagation preventing structure 2 in the case where the driver's seat 16 and the B pillar 44 are employed as opposing vehicle compartment components will be described.

  Specifically, the vehicle interior noise propagation preventing structure 2 according to the present embodiment transmits the lower part of the floor panel 100 and the B pillar 44, so that the B pillar side side surface 30 b and the B pillar 44 of the driver seat 30 are connected to each other. It travels between the inner surface 44a and diverts the transmitted noise S3 transmitted to the ear E1 of the passenger O1.

  In the present structure 2, the fifth protrusion 46 is provided on the B-pillar side surface 30 b of the driver seat 30, and the sixth protrusion 48 is provided on the inner peripheral surface 44 a of the B pillar 44. In the present embodiment, the sixth projecting portion 48 is provided at a position that is approximately one projecting width lower than the fifth projecting portion 46. With this protrusion arrangement, a line segment L7, which is a new minimum facing distance line segment connecting the fifth protrusion 46 and the sixth protrusion 48, is inclined toward the inner peripheral surface 44a side of the B pillar 44 with respect to the horizontal direction. It is a line segment that goes up to the left in the figure. Therefore, the changed traveling direction of the transmitted noise S3 orthogonal to the line segment L7 is directed to the inner surface 44a of the B pillar 44 and deviates from the ear E1 of the passenger O1.

  Furthermore, also in this embodiment, by providing the sound absorbing material 50 on the B pillar inner surface 44a in the traveling direction of the transmitted noise S3 orthogonal to the line segment L7, the transmitted noise S3 is reflected by the B pillar inner surface 44a. Can be prevented.

  In addition, this invention is not limited to the said embodiment, A various change is possible within the range of the summary of invention. For example, in the above embodiment, the description has been given of the case where the opposite passenger compartment components are the passenger seat 16, the driver seat 30 and the center console 14, and the driver seat 30 and the B pillar 44. The present invention is not limited, and the vehicle interior noise propagation prevention structure of the present invention may be applied to other vehicle compartment components such as doors and seats or seats and tunnels.

  Further, in the above-described embodiment, the protrusions and the dents are employed as the minimum distance changing part. However, the present invention is not limited to this, and the minimum facing distance of the facing vehicle compartment components is changed and after the change. Any structure can be adopted as long as the direction orthogonal to the line segment connecting the minimum facing distance portions can be shifted from the direction of traveling to the ears of the passengers O1 and O2.

  Further, in each of the above-described embodiments, the first protrusion 18 and the second protrusion 20 are provided on both the passenger seat side surface 14a of the center console 14 and the console side surface 16a of the passenger seat seat as the new minimum facing distance component. The traveling direction of the transmitted noise S1 is changed by setting the distance between the first protrusion tip 18a and the second protrusion tip 20 as the minimum facing distance, but the present invention is not limited to this. Only the first protrusion 18 is provided, the second protrusion 20 is not provided, and the distance between the tip 18a of the first protrusion 18 and the console side surface 16a of the passenger seat is set to the minimum facing distance, thereby reducing the transmitted noise S1. The direction of travel may be changed.

1 Car compartment 2 Car interior noise propagation prevention structure 10 Driver's seat (vehicle compartment component, seat)
12 Passenger seat (chamber component, seat)
14 Center console (vehicle compartment components)
14a Front passenger seat side (mutual facing surface)
16 Passenger seat (seat seat)
16a Console side surface (opposite surface)
18 First protrusion (new minimum facing distance component)
18a First projection tip 20 Second projection (new minimum facing distance component)
20a Second projection tip 22 Third projection (new minimum facing distance component)
22a Third projection tip 24 Fourth projection (new minimum facing distance component)
24a Fourth projection tip 30 Driver's seat (seat seat)
30a Console side surface 30b B pillar side surface (mutually opposed surfaces)
32 Sound absorbing material (sound absorbing means)
34 Sound absorbing material (sound absorbing means)
40 dent (new minimum facing distance component)
42 Transmission noise absorber (sound absorbing means)
44 B-pillar (vehicle compartment component)
44a B pillar inner surface (mutual facing surface)
46 5th protrusion (new minimum facing distance component)
46a 5th protrusion tip 48 6th protrusion part (new minimum opposing distance constituent part)
48a Sixth projection tip 50 Sound absorbing material (sound absorbing means)
100 Floor panel S1, S2, S3 Transmission noise O1, O2 Passenger E1, E2 Passenger's ear

Claims (7)

Transmitted noise transmitted through the floor panel of an automobile and propagating to the passenger's ear by traveling in the direction perpendicular to the line segment connecting the minimum facing distance portions of the compartment constituent members between the opposing compartment constituent members. A structure for preventing noise propagation in the passenger compartment,
A vehicle interior noise propagation preventing structure comprising a new minimum facing distance component that constitutes the new minimum facing distance portion so as to divert the transmitted noise from the direction of traveling to the ear of the passenger. The new minimum facing distance component is
The vehicle interior noise propagation preventing structure according to claim 1, wherein the vehicle interior noise propagation preventing structure is a protrusion provided on at least one of the mutually facing surfaces of the opposing vehicle interior constituent members. The new minimum facing distance component is
The vehicle interior transmitted noise propagation preventing structure according to claim 1, wherein the vehicle interior transmitted noise propagation preventing structure is a recessed portion provided on at least one of mutually facing surfaces of the facing vehicle compartment constituting members.   The vehicle interior noise propagation preventing structure according to any one of claims 1 to 3, wherein a sound absorbing means is provided in a traveling direction of the transmitted noise changed by the new minimum facing distance component.   The vehicle interior transmitted noise propagation preventing structure according to any one of claims 1 to 4, wherein the facing vehicle compartment constituting members are a center console and a seat portion of a seat, respectively.   The vehicle interior transmitted noise propagation preventing structure according to any one of claims 1 to 4, wherein the facing vehicle compartment constituting members are respectively a B pillar and a seat portion of a seat.   The vehicle interior transmitted noise propagation preventing structure according to any one of claims 1 to 4, wherein the facing vehicle compartment constituent members are respectively a door and a seat portion of a seat.

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