JP7666145B2 - vehicle - Google Patents

Description

This disclosure relates to vehicles.

It has been known for some time that speaker units are attached to the doors of vehicles such as automobiles. For example, Patent Document 1 discloses a speaker system in which a speaker unit is attached to the inner panel of a door.

International Publication No. 2009/144818

However, in the speaker system described in Patent Document 1, sound from the rear side of the speaker unit leaks into the vehicle cabin through the gap between the inner panel and other panels. This causes the sound from the front side of the speaker unit to be cancelled out by the opposite-phase sound leaking through the gap, resulting in a problem of degraded acoustic performance.

This disclosure has been made in consideration of the above-mentioned circumstances, and aims to solve one of the problems by suppressing sound leakage from the speaker unit into the vehicle cabin and suppressing deterioration of acoustic performance.

To solve the above problem, a vehicle according to one embodiment of the present disclosure has a speaker unit that emits sound into the vehicle interior space, a door in which a first space is formed as an enclosure for the speaker unit, and a vehicle structure adjacent to the door that has a second space, and the first space is in communication with the second space.

1 is a partial cross-sectional view of a vehicle according to a first embodiment. 1 is a schematic diagram showing an opening provided in a door trim and a vehicle structure as viewed in one direction. FIG. 2 is a partial cross-sectional view of a vehicle according to a reference example. FIG. 11 is a partial cross-sectional view of a vehicle according to a second embodiment. FIG. 11 is a partial cross-sectional view of a vehicle according to a third embodiment. FIG. 11 is a partial cross-sectional view of a vehicle according to a modified example. FIG. 11 is a partial cross-sectional view of a vehicle according to a modified example.

First Embodiment
Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. Note that the dimensions and scale of each part in the drawings are appropriately different from the actual ones. In addition, the embodiment described below is a preferred specific example of the present disclosure. Therefore, various technically preferable limitations are attached to this embodiment. However, the scope of the present disclosure is not limited to these forms unless otherwise specified in the following description to limit the present disclosure.

1 is a partial cross-sectional view of a vehicle 1 according to the first embodiment, and is a diagram showing a schematic configuration example of the vehicle 1. The vehicle 1 is, for example, a vehicle such as an automobile. The vehicle 1 has a door 100 and a vehicle structure 200. In the following, one direction in the thickness direction of the door 100 may be referred to as the X1 direction, and the opposite direction to the X1 direction may be referred to as the X2 direction. The X-axis direction is a direction including both the X1 direction and the X2 direction. In addition, one direction in the height direction of the vehicle 1 may be referred to as the Z1 direction, and the opposite direction to the Z1 direction may be referred to as the Z2 direction. The Z-axis direction is a direction including both the Z1 direction and the Z2 direction. Furthermore, a direction perpendicular to both the X-axis and the Z-axis may be referred to as the Y-axis direction. Here, when the door 100 is used in the vehicle 1, the X1 direction is a direction from the outside of the vehicle 1 toward the vehicle interior space 50 (inside the vehicle interior), and the X2 direction is a direction from the vehicle interior space 50 toward the outside of the vehicle 1.

The door 100 is a door used in the vehicle 1 and has a speaker function. The door 100 is, for example, a back door, a front door, or a rear door of the vehicle 1. The door 100 has an outer panel 10, a door trim 20, an inner panel 30, and a speaker unit 40.

The outer panel 10, inner panel 30, and door trim 20 are arranged in this order in the X1 direction. In this way, the outer panel 10 faces the outside of the vehicle 1, the door trim 20 is arranged on the passenger compartment space 50 side, and the inner panel 30 is arranged between the outer panel 10 and the door trim 20.

The outer panel 10 is a panel that faces the exterior of the vehicle 1. The outer panel 10 is made of, for example, a steel plate. The outer panel 10 is not limited to a steel plate configuration, and may be made of, for example, an aluminum alloy or a carbon fiber composite material.

The door trim 20 is an interior material provided on the passenger compartment space 50 side of the vehicle 1. The door trim 20 is detachably attached to the inner panel 30 by a plurality of connecting members (not shown). The connecting members are, for example, rivets or clips made of resin. As shown in FIG. 1, the door trim 20 has an opening 20a. The opening 20a is an example of a "first opening." The opening 20a may be covered with a mesh material such as saran net.

The door trim 20 also has an opening 20b. The opening 20b is provided at the end of the door trim 20 in the Z1 direction. In the example shown in FIG. 1, the opening 20b penetrates the door trim 20 in the Z axis direction. The width D2 of the opening 20b (in the example shown in FIG. 1, the length in the X axis direction) is larger than the gap D3 (in the example shown in FIG. 1, the length in the Z axis direction) between the door trim 20 and the vehicle structure 200 described below. The opening 20b is an example of a "fourth opening". The material constituting the door trim 20 is, for example, a synthetic resin, but the material is not particularly limited.

The inner panel 30 is provided between the outer panel 10 and the door trim 20. The inner panel 30 has a through hole 30b. The through hole 30b overlaps with the opening 20a of the door trim 20 when viewed in the X-axis direction. The outer peripheral edge of the inner panel 30 is joined to the outer panel 10 over the entire circumference, and a space 11 is formed between the inner panel 30 and the outer panel 10. As shown in FIG. 1, the inner panel 30 has an opening 30a. The position, planar shape, and size of the opening 30a are not particularly limited and are arbitrary. The opening 30a is an example of a "second opening". In the example shown in FIG. 1, two openings 30a are provided in the inner panel 30, but one opening or three or more openings may be provided. The inner panel 30 is made of, for example, a steel plate. The inner panel 30 is not limited to a steel plate, and may be made of, for example, an aluminum alloy or a carbon fiber composite material.

Space 11 is a space defined by outer panel 10 and inner panel 30. Space 11 functions as an enclosure for speaker unit 40 and houses speaker unit 40. Space 11 communicates with space 132 via opening 30a.

As shown in FIG. 1, a cushion member 17 and a rib 18 are provided between the inner panel 30 and the door trim 20.

The rib 18 is a protrusion that protrudes in the X2 direction from the surface of the door trim 20 facing the X2 direction, and is configured in a ring shape along the outer periphery of the opening 20a. The rib 18 divides the space between the inner panel 30 and the door trim 20 into a space 131 and a space 132. The space 131 is a space for emitting the sound SNa emitted from the front of the speaker unit 40 to the vehicle interior space 50. The space 132 is a space for escaping the sound SN emitted from the rear of the speaker unit 40 to a space 12 of the vehicle structure 200 described later, and is separated from the vehicle interior space 50 by the door trim 20. The space 132 is an example of a "third space".

The cushion member 17 is disposed between the surface of the inner panel 30 facing the X1 direction and the rib 18, and is configured in a ring shape along the circumferential direction of the rib 18. The cushion member 17 is an elastic member that seals the gap between the inner panel 30 and the rib 18, and is made of, for example, rubber or elastomer.

The speaker unit 40 is an acoustic device that emits sound toward the vehicle interior space 50. The speaker unit 40 is attached to the inner panel 30 via a circular mounting member 14. The mounting member 14 has a plurality of screw holes 14a and a plurality of holes 14b. The screw holes 14a are fitted with screws 16 that penetrate the flange portion 40b of the speaker unit 40. This allows the mounting member 14 to be attached to the speaker unit 40. Furthermore, the holes 14b of the mounting member 14 to which the speaker unit 40 is attached are penetrated by screws 15. The screws 15 that penetrate the holes 14b are fitted with through holes 30c provided in the inner panel 30. This allows the mounting member 14 to which the speaker unit 40 is attached to be attached to the surface of the inner panel 30 facing the X2 direction. Here, the speaker unit 40 blocks the through holes 30b, and the space 11 and the space 131 are separated by the speaker unit 40. The speaker unit 40 emits sound toward the vehicle interior space 50 through the through hole 30b and the opening 20a.

The vehicle structure 200 is a part or all of a structure that surrounds the door 100 among various structures that constitute the vehicle 1, and is adjacent to the door 100. Specifically, if the door 100 is a back door of the vehicle 1, the vehicle structure 200 is, for example, an end panel of the vehicle 1. Alternatively, if the door 100 is a front door or rear door of the vehicle 1, the vehicle structure 200 is, for example, a side sill or a pillar (such as an A-pillar, B-pillar, or C-pillar) of the vehicle 1.

As shown in FIG. 1, an elastic member 19 is provided between the inner panel 30 and the vehicle structure 200. The elastic member 19 functions as a cushion to prevent direct contact between the door 100 and the vehicle structure 200. The elastic member 19 is made of rubber, elastomer, or the like.

The vehicle structure 200 has a first panel 210, a second panel 220, and a space 12. The first panel 210 is a panel that faces the outside of the vehicle 1. The first panel 210 is made of, for example, a steel plate. The first panel 210 is not limited to a configuration using a steel plate, and may be made of, for example, an aluminum alloy or a carbon fiber composite material. The first panel 210 may be made of a laminate of multiple panels. The second panel 220 is a panel provided on the passenger compartment space 50 side of the vehicle 1. The material that makes up the second panel 220 is, for example, a synthetic resin, but the material is not particularly limited.

2 is a schematic diagram of the opening 20b viewed in the Z1 direction. The vehicle structure 200 has an opening 12a. As shown in FIG. 1, the opening 12a overlaps with the opening 20b provided in the door trim 20 when viewed in the Z2 direction. Similarly, as shown in FIG. 2, the opening 20b overlaps with the opening 12a when viewed in the Z1 direction. The "overlapping" means that when the opening 20b is viewed in the Z1 direction, at least a part of the periphery of the opening 20b intersects with the periphery of the opening 12a. The width D1 of the opening 12a (in the example shown in FIG. 1, the length in the X-axis direction) is larger than the gap D3 between the door trim 20 and the vehicle structure 200 (in the example shown in FIG. 1, the length in the Z-axis direction). The opening 12a is an example of a "third opening". The widths D1 and D2 described above are lengths in a direction intersecting the Y-axis direction on a plane along the periphery of the opening 12a. The positions, planar shapes, and sizes of the openings 20b and 12a are not particularly limited and may be arbitrary. Furthermore, the number of openings 20b and 12a may be one or more than two.

Space 12 is a space defined by the first panel 210 and the second panel 220. Space 12 communicates with space 132 via openings 12a and 20b. That is, space 11 communicates with space 12 via space 132. Space 12 is an example of a "second space." Note that when the first panel 210 is composed of multiple panels, space 12 may be the space between each of the multiple panels.

As described above, the vehicle 1 according to the first embodiment has a speaker unit 40 that emits sound into the vehicle interior space 50, a door 100 in which a space 11 is formed as an enclosure for the speaker unit 40, and a vehicle structure 200 that has a space 12 and is adjacent to the door 100, and the space 11 communicates with the space 12. According to this embodiment, since the space 11 and the space 12 communicate with each other, the sound SN emitted from the back of the speaker unit 40 into the space 11 is emitted into the space 12. Therefore, the emission of the sound of the opposite phase from the back of the speaker unit 40 into the vehicle interior space 50 is reduced. As a result, the acoustic performance can be improved compared to a configuration in which the sound SN from the back is emitted into the vehicle interior space 50. In addition, compared to a configuration in which the space 11 does not communicate with the space 12, the volume of the enclosure is expanded, and the bass reproduction capability can also be improved.

In contrast, the configuration shown in FIG. 3 does not provide the effects of the vehicle 1 described above. This point will be briefly explained below with reference to FIG. 3.

Figure 3 is a partial cross-sectional view of a vehicle 2 according to a reference example. In the door 100 of the vehicle 2, sound SNb emitted from the back of the speaker unit 40 into the space 11 leaks into the vehicle interior space 50 through the gap D3. For this reason, in the door 100 of the vehicle 2, sound SNa and sound SNb from the front of the speaker unit 40 cancel each other out in the vehicle interior space 50, resulting in a deterioration in sound quality. It is possible to consider sealing the gap D3, but depending on the shape of the door 100 of the vehicle 2, completely sealing the gap D3 may be practically difficult or may result in high costs.

As described above, the door 100 according to the first embodiment has an outer panel 10 facing the outside of the vehicle 1, a door trim 20 provided on the vehicle interior space 50 side and having an opening 20a, and an inner panel 30 provided between the outer panel 10 and the door trim 20 and having an opening 30a. The space 11 is provided between the outer panel 10 and the inner panel 30, the speaker unit 40 is attached to the inner panel 30 and emits sound into the vehicle interior space 50 through the opening 20a, and a space 132 is provided between the inner panel 30 and the door trim 20, which is separated from the vehicle interior space 50 by the door trim 20, and the space 11 communicates with the space 12 through the space 132. According to this embodiment, the sound SN emitted from the back of the speaker unit 40 into the space 11 is emitted into the space 12 through the space 132 due to the communication between the space 11, the space 12, and the space 132. This reduces the emission of out-of-phase sound from the rear of the speaker unit 40 into the vehicle interior space 50. As a result, acoustic performance can be improved compared to a configuration in which sound SN from the rear is emitted into the vehicle interior space 50.

Furthermore, as described above, the vehicle structure 200 according to the first embodiment has an opening 12a, the door trim 20 according to the first embodiment has an opening 20b, and the space 132 communicates with the space 12 via the openings 12a and 20b. In this embodiment, the configuration for preventing the intrusion of water such as rainwater into the vehicle interior space 50 is simpler than a configuration in which an opening is provided in the inner panel 30.

In addition, as described above, the width D1 of the opening 12a and the width D2 of the opening 20b in the first embodiment are larger than the gap D3 between the door trim 20 and the vehicle structure 200. According to this embodiment, the sound SN from the space 132 can be preferentially introduced into the space 12 rather than into the vehicle interior space 50.

Second Embodiment
4 is a partial cross-sectional view of the vehicle 1 according to the second embodiment, and is a diagram that illustrates a schematic configuration example of the vehicle 1. In the following description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted or simplified.

The second embodiment differs from the first embodiment in that the speaker unit 40 is attached to the door trim 20. Specifically, the speaker unit 40 is attached to the door trim 20 via an annular mounting member 14. More specifically, a screw 15 passing through a hole 14b of the mounting member 14 to which the speaker unit 40 is attached fits into a through hole 20c provided in the door trim 20. As a result, the mounting member 14 to which the speaker unit 40 is attached is attached to the surface of the door trim 20 facing the X2 direction. The speaker unit 40 according to the second embodiment emits sound toward the vehicle interior space 50 through the opening 20a.

As shown in Fig. 4, the door 100 according to the second embodiment includes an outer panel 10 facing the outside of the vehicle 1, a door trim 20 provided on the vehicle interior space 50 side and having an opening 20a, and an inner panel 30 provided between the outer panel 10 and the door trim 20 and having an opening 30a. A space 11 according to the second embodiment is provided between the outer panel 10 and the inner panel 30. Furthermore, the speaker unit 40 according to the second embodiment is attached to the door trim 20 and emits sound into the vehicle interior space 50 through the opening 20a. In addition, in the second embodiment, a space 132 is provided between the inner panel 30 and the door trim 20, which is separated from the vehicle interior space 50 by the door trim 20, and the space 11 communicates with the space 12 through the space 132.
According to the above aspect, as in the first embodiment, the space 11, the space 12, and the space 132 are in communication with each other, so that the sound SN emitted from the rear surface of the speaker unit 40 into the space 11 is emitted into the space 12 via the space 132. This reduces emission of an anti-phase sound from the rear surface of the speaker unit 40 into the vehicle interior space 50. As a result, it is possible to improve the acoustic performance compared to a configuration in which the sound SN from the rear surface is emitted into the vehicle interior space 50. Furthermore, according to the above aspect, by attaching the speaker unit 40 to the door trim 20, the space 132 can be easily isolated from the vehicle interior space 50 by the door trim 20.

In the second embodiment, similar to the first embodiment, the vehicle structure 200 has an opening 12a, and the door trim 20 has an opening 20b. Similarly to the first embodiment, the space 132 according to the second embodiment communicates with the space 12 via the openings 12a and 20b. Therefore, compared to a configuration in which an opening is provided in the inner panel 30, the configuration for preventing the intrusion of water such as rainwater into the vehicle interior space 50 is simple.

Furthermore, in the second embodiment, as in the first embodiment, the width D1 of the opening 12a and the width D2 of the opening 20b are larger than the gap D3 between the door trim 20 and the vehicle structure 200. Therefore, the sound SN from the space 132 can be preferentially introduced into the space 12 rather than into the vehicle interior space 50.

Third Embodiment
5 is a partial cross-sectional view of a vehicle 1 according to a third embodiment, and is a diagram that illustrates a schematic configuration example of the vehicle 1. In the following description of the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

The third embodiment differs from the first embodiment in that an opening 210a is provided in the first panel 210 of the vehicle structure 200. The space 12 of the third embodiment communicates with the space outside the vehicle cabin through the opening 210a. With this configuration, the sound SN emitted from the back surface of the speaker unit 40 to the space 12 through the space 11 and the space 132 is emitted to the space outside the vehicle cabin. Therefore, compared to a case where the opening 210a is not provided in the vehicle structure 200, the sound SN from the back surface of the speaker unit 40 is more easily introduced into the space 12, and the emission of the antiphase sound emitted to the space 12 to the vehicle cabin space 50 is reduced. As a result, the acoustic performance can be improved compared to a case where the opening 210a is not provided in the vehicle structure 200. In addition, by providing the opening 210a, the space outside the vehicle cabin is also used for the enclosure. Therefore, compared to a configuration where the opening 21a is not provided, the volume of the enclosure is expanded, and the bass reproduction capability can be improved. The "space outside the vehicle cabin" mentioned above may be any space that is not connected to the vehicle cabin space 50, and may include not only the outside of the vehicle 1, but also spaces such as the engine room or wheel house of the vehicle 1. The position, planar shape, and size of the opening 210a are not particularly limited and may be arbitrary.

<Modification>
Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-mentioned embodiments and may be modified in various ways. Specific modified aspects that can be added to the above-mentioned aspects are exemplified below. Two or more aspects arbitrarily selected from the following examples may be appropriately combined within a range that is not mutually contradictory.

[Variation 1]
6 is a partial cross-sectional view of the vehicle 1 according to the first modification, and is a diagram showing a schematic configuration example of the vehicle 1. As shown in FIG. 6, the vehicle 1 according to the above-mentioned aspect may be configured such that the opening 30a is provided at the end of the inner panel 30 in the Z1 direction, and the opening 12a is provided in the first panel 210. In the vehicle 1 according to the first modification, the opening 30a and the opening 12a overlap when viewed in the Z-axis direction, and the space 11 communicates with the space 12 via the opening 30a and the opening 12a. Even in this configuration, the sound SN emitted from the back surface of the speaker unit 40 into the space 11 is released into the space 12, so that the same action and effect as the first embodiment described above can be obtained.

[Variation 2]
Fig. 7 is a partial cross-sectional view of the vehicle 1 according to the modified example 2, and is a diagram illustrating a schematic configuration example of the vehicle 1. As shown in Fig. 7, the vehicle 1 of the above-mentioned aspect may be configured such that an opening 12b is provided in the second panel 220. In other words, the space 12 may be configured to communicate with the vehicle interior space 50 via the opening 12b.

<Additional Information>
The vehicle 1 of the above embodiment is typically an automobile. However, the application of the present invention is not particularly limited, and the present invention may be applied to vehicles other than automobiles in general.

Furthermore, the effects described in this specification are merely descriptive or exemplary and are not limiting. In other words, the present invention may achieve other effects that are apparent to a person skilled in the art from the description in this specification, in addition to or in place of the above-mentioned effects.

Furthermore, in the above-mentioned aspect, the preferred embodiment of the present disclosure has been described in detail with reference to the attached drawings, but the present disclosure is not limited to such examples. It is clear that a person with ordinary knowledge in the technical field of the present disclosure can conceive of various modified or amended examples within the scope of the technical ideas described in the claims, and it is understood that these also naturally fall within the technical scope of the present disclosure.

<Additional Notes>
From the above-described exemplary embodiments, the following configurations can be understood, for example.

A vehicle according to one aspect (aspect 1) of the present disclosure has a speaker unit that emits sound into the vehicle interior space, a door in which a first space is formed as an enclosure for the speaker unit, and a vehicle structure adjacent to the door that has a second space, the first space communicating with the second space. According to the above aspect, since the first space and the second space communicate with each other, sound emitted from the rear surface of the speaker unit into the first space is released into the second space. This reduces the emission of anti-phase sound from the rear surface of the speaker unit into the vehicle interior space. As a result, acoustic performance can be improved compared to a configuration in which sound from the rear surface is released into the vehicle interior space.

In a specific example (aspect 2) of aspect 1, the door has an outer panel facing the outside of the vehicle, a door trim provided on the passenger compartment side and having a first opening, and an inner panel provided between the outer panel and the door trim and having a second opening, the first space is provided between the outer panel and the inner panel, the speaker unit is attached to the inner panel and emits sound into the passenger compartment space through the first opening, and a third space is provided between the inner panel and the door trim and separated from the passenger compartment space by the door trim, and the first space communicates with the second space through the third space. According to this aspect, the first space, the second space, and the third space are communicated with each other, so that the sound emitted from the back of the speaker unit into the first space is emitted into the second space through the third space. Therefore, the emission of antiphase sound from the back of the speaker unit into the passenger compartment space is reduced. As a result, the acoustic performance can be improved compared to a configuration in which the sound from the back is emitted into the passenger compartment space.

In a specific example (aspect 3) of aspect 1, the door has an outer panel facing the outside of the vehicle, a door trim provided on the passenger compartment side and having a first opening, and an inner panel provided between the outer panel and the door trim and having a second opening, the first space is provided between the outer panel and the inner panel, the speaker unit is attached to the door trim and emits sound into the passenger compartment space through the first opening, a third space is provided between the inner panel and the door trim and is separated from the passenger compartment space by the door trim, and the first space communicates with the second space through the third space. According to this aspect, since the first space, the second space, and the third space are communicated with each other, the sound emitted from the back of the speaker unit into the first space is emitted into the second space through the third space. Therefore, the emission of antiphase sound from the back of the speaker unit into the passenger compartment space is reduced. As a result, the acoustic performance can be improved compared to a configuration in which the sound from the back is emitted into the passenger compartment space. Furthermore, according to the above aspect, the third space can be easily separated from the vehicle interior space by the door trim.

In a specific example (Aspect 4) of Aspect 2 or Aspect 3, the vehicle structure has a third opening, the door trim has a fourth opening, and the third space communicates with the second space via the third opening and the fourth opening. According to this aspect, the configuration for preventing the intrusion of water such as rainwater into the vehicle interior space can be simplified compared to a configuration in which an opening is provided in an inner panel.

In a specific example (aspect 5) of aspect 4, the width of each of the third opening and the fourth opening is greater than the gap between the door trim and the vehicle structure. According to this aspect, sound from the third space can be preferentially introduced into the second space rather than into the vehicle interior space.

According to a specific example (aspect 6) of any of aspects 1 to 5, the vehicle structure is a part or all of a structure surrounding the door.

According to a specific example (aspect 7) of any one of aspects 1 to 6, the door is a back door.

According to a specific example (Aspect 8) of any of Aspects 1 to 7, the second space communicates with the space outside the vehicle cabin. According to this aspect, sound emitted from the rear surface of the speaker unit to the second space via the first space and the third space is emitted to the space outside the vehicle cabin. Therefore, compared to a case where the second space is not connected to the space outside the vehicle cabin, the emission of anti-phase sound emitted from the rear surface of the speaker unit to the second space into the vehicle cabin space is reduced.

1, 2...vehicle, 10...outer panel, 11, 12, 131, 132...space, 12a, 20a, 20b, 30a, 210a...opening, 20...door trim, 30...inner panel, 40...speaker unit, 100...door, 200...vehicle structure.

Claims (7)

a door having a speaker unit that emits sound into a vehicle interior space, the door forming a first space as an enclosure for the speaker unit;
a vehicle structure having a second space and adjacent to the door;
The door is
An outer panel facing the exterior of the vehicle;
a door trim provided on the vehicle interior space side and having a first opening;
an inner panel provided between the outer panel and the door trim, the inner panel having a second opening,
The first space is provided between the outer panel and the inner panel,
The speaker unit is attached to the inner panel and emits sound into the vehicle interior space through the first opening,
a third space is provided between the inner panel and the door trim and separated from the vehicle interior space by the door trim,
The first space communicates with the second space via the third space .
vehicle. a door having a speaker unit that emits sound into a vehicle interior space, the door forming a first space as an enclosure for the speaker unit;
a vehicle structure having a second space and adjacent to the door;
The door is
An outer panel facing the exterior of the vehicle;
a door trim provided on the vehicle interior space side and having a first opening;
an inner panel provided between the outer panel and the door trim, the inner panel having a second opening,
The first space is provided between the outer panel and the inner panel,
the speaker unit is attached to the door trim and emits sound into the vehicle interior space through the first opening,
a third space is provided between the inner panel and the door trim and separated from the vehicle interior space by the door trim,
The first space communicates with the second space via the third space.
vehicle . The vehicle structure has a third opening,
The door trim has a fourth opening,
The vehicle according to claim 1 or 2 , wherein the third space is in communication with the second space via the third opening and the fourth opening. The vehicle according to claim 3 , wherein a width of each of the third opening and the fourth opening is greater than a gap between the door trim and the vehicle structural body. The vehicle according to claim 1 , wherein the vehicle structural body is a part or an entirety of a structure surrounding the door. The vehicle according to claim 1 , wherein the door is a back door. The vehicle according to claim 1 , wherein the second space communicates with a space outside the vehicle compartment.

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