Vehicle sound information provision equipment

Abstract

To provide a vehicular sound information providing device capable of suppressing diffusion of a sound to outside a road site.SOLUTION: A loudspeaker 1 is installed for a road where vehicles pass at a place where it does not disturb passage of the vehicles, and then provides sound information for passengers of the vehicles. The loudspeaker 1 comprises: a plane loudspeaker body 11 which generates a sound from both top and reverse sides (in a vehicle ongoing direction and an opposite vehicle ongoing direction); and waveguide plates 12-14 which are extended from an upper edge, a lower edge and one side edge of the plane loudspeaker body 11 along a radiation direction of the sound of the plane loudspeaker body 11, and directs the radiation of the sound to only the passage zone of the vehicles.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a vehicle sound information providing device that is installed on the roadside and provides information by voice or sound to a vehicle occupant (driver) of a vehicle traveling on the road. Vehicle sound information provision equipment equipped with Regarding. [Background technology]

[0002] 2. Description of the Related Art Conventionally, there are known speakers that are installed on the side of the road and emit warning sounds such as emergency voice broadcasts and sirens. Note that one type of speaker is a flat type (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5731310 Summary of the Invention [Problem to be solved by the invention]

[0004] If loudspeakers installed on the side of the road are used for regular broadcasting at all times except during emergencies, there is a risk that the sound will spread outside the road premises and become a disturbance to nearby residents.

[0005] The present invention has been made to solve the above problems, and an object of the present invention is to provide a method and system for suppressing sound diffusion outside the road site. Vehicle sound information provision equipment The purpose of this project is to provide [Means for solving the problem]

[0006] According to the present invention The vehicle sound information providing equipment includes a vehicle sound information providing device for providing sound information to a vehicle occupant, the vehicle sound information providing device comprising: They are installed on roads where vehicles travel and do not interfere with the passage of vehicles. and a control device controls the provision of sound information from the vehicle sound information providing device to a passenger of the vehicle. The vehicle sound information providing device includes: Both sides Face Flat speaker body that emits sound and wherein one of the front and back surfaces is arranged to emit a sound in a direction along the vehicle travel direction on the road, and the other of the front and back surfaces is arranged to emit a sound in a direction along the vehicle reverse travel direction on the road, andA wave guide extending from at least one of the upper edge, the lower edge and one side edge of the flat speaker body along the sound radiation direction of the flat speaker body, and directing the sound radiation direction only toward the lane of the vehicle. Board Prepare.

[0007] With this configuration, the waveguide can suppress the diffusion of sound outside the road premises. In addition, the vehicle sound information providing device is not placed in a congestion predicted zone that is predicted to be a source of congestion on the road, but is placed in a sound information providing zone that is defined upstream in the vehicle travel direction from the congestion predicted zone. The vehicle also includes a downstream traffic jam detection sensor for detecting the occurrence of traffic jam in the traffic jam predicted zone, and an upstream traffic jam detection sensor for detecting the occurrence of traffic jam in the sound information provision zone, and the controller controls the provision of sound information from the vehicle sound information provision device to provide sound information to an occupant of the vehicle indicating that traffic jam has occurred in the traffic jam predicted zone only when a condition is met in which the upstream traffic jam detection sensor has not detected the occurrence of traffic jam and the downstream traffic jam detection sensor has detected the occurrence of traffic jam. .

[0008] In the above sound information providing device for a vehicle, the waveguide may have a variable extension length from the flat speaker body at any one of an upper edge, a lower edge and one side edge of the flat speaker body.

[0009] In the above sound information providing device for a vehicle, the waveguide may be detachably attached to any one of an upper edge, a lower edge and one side edge of the flat speaker body.

[0010] In the above sound information providing device for a vehicle, the waveguide may be made of a metal plate provided with vibration damping means.

[0011] In the vehicle sound information providing device in which the waveguide is provided with a vibration damping means, the vibration damping means may be made of a viscoelastic polymer material layer.

[0012] In the vehicle sound information providing device in which the waveguide plate is provided with a vibration damping means, the vibration damping means may be detachable from the metal plate.

[0013] In the above sound information providing device for a vehicle, the flat speaker body may be covered with a waterproof and dustproof sheet. Effect of the Invention

[0016] The present invention Vehicle sound information provision equipment According to this, it is possible to suppress the diffusion of sound outside the road premises. [Brief description of the drawings]

[0017] [Figure 1] 1 is a block diagram showing the entire system of a vehicle sound information providing device according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a diagram for explaining the entire system of the vehicle sound information providing device of FIG. [Diagram 3] 4 is a flowchart for explaining the operation of the entire system of the vehicle sound information providing device according to the present embodiment. [Figure 4] 2 is a perspective view showing a speaker of the entire system of the vehicle sound information providing device of FIG. 1. [Diagram 5] FIG. 5 is a side view showing the speaker of FIG. [Figure 6] FIG. 5 is a front view showing the speaker of FIG. [Figure 7] FIG. 5 is a plan view showing the speaker of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, one embodiment of the present invention will be described.

[0019] First, the configuration of an entire system 100 of a vehicle sound information providing device (speaker 1) according to one embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.

[0020] The entire system 100 of the vehicle sound information providing device is installed at a location (roadside) on a road where the vehicle travels that does not impede the vehicle's passage, and is configured to provide information by voice or sound to the occupants (drivers) of the vehicle traveling on the road. In other words, the entire system 100 of the vehicle sound information providing device is a third information providing means different from the conventional road information board equipment (electronic bulletin board) and highway radio equipment (car radio), and is capable of broadcasting at all times during normal times other than emergencies. For example, the entire system 100 of the vehicle sound information providing device is installed in a portion of the highway other than a tunnel.

[0021] 1, the entire system 100 of the vehicle sound information providing device includes 32 speakers 1-1 to 1-32, a speaker controller 2, traffic congestion detection sensors 3a and 3b, and a rain sensor 4. When there is no need to distinguish between the 32 speakers 1-1 to 1-32, they will be referred to as speaker 1.

[0022] The speaker 1 is for outdoor use and is configured so that it can be installed on the roadside. The speaker 1 has directionality and is installed so that the output sound is directed toward the vehicle lane of the road. The structure of the speaker 1 will be described in detail later. The speaker 1 is an example of the "vehicle sound information providing device" of the present invention.

[0023] As shown in Fig. 2, the speaker 1 is arranged upstream in the vehicle travel direction (X1 direction) of an area A1 on a highway that is expected to become a source of congestion (hereinafter referred to as a "traffic jam predicted area"). The traffic jam predicted area A1 is, for example, a construction area or an accident-prone area. That is, a sound information provision area A2 is provided upstream of the traffic jam predicted area A1, and the speaker 1 is arranged in the sound information provision area A2. For example, 32 speakers 1-1 to 1-32 are arranged in order along the vehicle travel direction in the sound information provision area A2.

[0024] 1, the speaker controller 2 is configured to control the speaker 1. The speaker controller 2 includes an audio reproduction device 21, amplifiers 22a and 22b, a control unit 23, a clock 24, and a communication unit 25.

[0025] The sound reproducing device 21 is configured to store sound sources 21a to 21d and selectively reproduce the sound sources 21a to 21d. For example, the sound sources 21a to 21d are voice messages saying "Be careful, traffic jam ahead", and the contents of the voice messages are the same but the sound pressure or frequency is different. The sound source 21a is used in the daytime when there is no rain, the sound source 21b is used in the daytime when there is rain, the sound source 21c is used at night when there is no rain, and the sound source 21d is used at night when there is rain. The sound pressure or frequency of the sound source 21a is lower than that of the sound source 21b and higher than that of the sound source 21c. The sound pressure or frequency of the sound source 21b is higher than that of the sound source 21d, and the sound pressure or frequency of the sound source 21c is lower than that of the sound source 21d. Moreover, this voice message is a voice message with a frequency centered between 500Hz and 2kHz, and an accent is added to the vowel "u". In addition, the frequency band from 500 Hz to 2 kHz tends to be lower inside a vehicle. Also, the formant frequency of "u" is about 500 Hz.

[0026] The amplifiers 22a and 22b are connected to the audio reproduction device 21 and configured to amplify a signal input from the audio reproduction device 21 and output the amplified signal to the speaker 1. The amplifier 22a is provided with first to fourth output systems, and the amplifier 22b is provided with fifth to eighth output systems.

[0027] The amplifier 22a is connected to speakers 1-1, 1-3, 1-5, and 1-7 via a first output system, to speakers 1-2, 1-4, 1-6, and 1-8 via a second output system, to speakers 1-9, 1-11, 1-13, and 1-15 via a third output system, and to speakers 1-10, 1-12, 1-14, and 1-16 via a fourth output system. In addition, speakers 1-17, 1-19, 1-21, and 1-23 are connected to the amplifier 22b via a fifth output system, speakers 1-18, 1-20, 1-22, and 1-24 are connected via a sixth output system, speakers 1-25, 1-27, 1-29, and 1-31 are connected via a seventh output system, and speakers 1-26, 1-28, 1-30, and 1-32 are connected via an eighth output system.

[0028] The control unit 23 is configured to control the audio reproduction device 21. The control unit 23 is connected to the traffic jam detection sensors 3a and 3b, the rain sensor 4, the clock 24, and the communication unit 25. The traffic jam detection sensor 3a is provided to detect the occurrence of traffic jam in the sound information provision area A2, and the traffic jam detection sensor 3b is provided to detect the occurrence of traffic jam in the traffic jam occurrence predicted area A1. The rain sensor 4 is provided to detect the presence or absence of rainfall in the sound information provision area A2. The clock 24 is configured to calculate the time. The communication unit 25 is provided to communicate with the mobile terminal 5 via the network 150. The mobile terminal 5 has a function of accepting a user's operation on the speaker controller 2.

[0029] The control unit 23 is configured to determine whether or not to cause the audio reproduction device 21 to reproduce a voice message based on inputs from the traffic congestion detection sensors 3a and 3b. When it is determined that a voice message is to be reproduced, the control unit 23 is configured to select one of the sound sources 21a to 21d based on inputs from the rain sensor 4 and the clock 24. That is, the control unit 23 is configured to cause the audio reproduction device 21 to reproduce a voice message with a sound pressure or frequency corresponding to the level of the surrounding background noise.

[0030] The control unit 23 is configured to control the audio reproduction device 21 in response to a user operation input from the mobile terminal 5 to the communication unit 25 via the network 150. For example, when a reproduction instruction is input by the user, the control unit 23 causes the audio reproduction device 21 to reproduce a voice message, and when a reproduction stop instruction is input by the user, the control unit 23 causes the audio reproduction device 21 to stop reproducing the voice message.

[0031] -Operation- Next, the operation of the entire system 100 of the vehicle sound information providing device of this embodiment will be described with reference to Fig. 3. The following flow is repeatedly executed at predetermined time intervals. Each of the following steps is executed by the control unit 23 of the speaker control device 2.

[0032] First, in step S1 of Fig. 3, it is determined whether the traffic congestion detection sensor 3a has detected a traffic congestion. That is, it is determined whether a traffic congestion has occurred in the sound information provision area A2. If it is determined that the traffic congestion detection sensor 3a has not detected a traffic congestion, the process proceeds to step S2. On the other hand, if it is determined that the traffic congestion detection sensor 3a has detected a traffic congestion, the traffic congestion has already extended to the sound information provision area A2, and it is no longer necessary to notify the user by a voice message, so the process proceeds to RETURN.

[0033] Next, in step S2, it is determined whether the traffic jam detection sensor 3b has detected a traffic jam. That is, it is determined whether a traffic jam has occurred in the traffic jam predicted area A1. If it is determined that the traffic jam detection sensor 3b has detected a traffic jam, it is necessary to notify the user by a voice message, so the process proceeds to step S3. On the other hand, if it is determined that the traffic jam detection sensor 3b has not detected a traffic jam, it is not necessary to notify the user by a voice message, so the process proceeds to RETURN.

[0034] Next, in step S3, it is determined whether it is daytime based on an input from the clock 24. For example, it is determined to be daytime if it is between 8:00 and 18:00. If it is determined to be daytime, the process proceeds to step S4. On the other hand, if it is determined not to be daytime (if it is nighttime), the process proceeds to step S5.

[0035] Next, in step S4, it is determined whether the rain sensor 4 detects rain. That is, it is determined whether it is raining in the sound information provision area A2. If it is determined that the rain sensor 4 does not detect rain, the process proceeds to step S6. On the other hand, if it is determined that the rain sensor 4 detects rain, the process proceeds to step S7.

[0036] Also, in step S5, it is determined whether the rain sensor 4 has detected rain. That is, it is determined whether it is raining in the sound information provision area A2. If it is determined that the rain sensor 4 has not detected rain, the process proceeds to step S8. On the other hand, if it is determined that the rain sensor 4 has detected rain, the process proceeds to step S9.

[0037] If it is daytime and there is no rain (step S4: No), in step S6, the sound source 21a is reproduced by the sound reproduction device 21. As a result, a sound message with a sound pressure or frequency corresponding to the daytime and there is no rain is output from the 32 speakers 1-1 to 1-32.

[0038] If it is daytime and there is rain (step S4: Yes), in step S7, the sound source 21b is reproduced by the sound reproduction device 21. As a result, a sound message with a sound pressure or frequency corresponding to the case where it is daytime and there is rain is output from the 32 speakers 1-1 to 1-32.

[0039] If it is nighttime and there is no rain (step S5: No), in step S8, the sound source 21c is reproduced by the sound reproduction device 21. As a result, a sound message with a sound pressure or frequency corresponding to the case of nighttime and there is no rain is output from the 32 speakers 1-1 to 1-32.

[0040] If it is nighttime and there is rain (step S5: Yes), in step S9, the sound source 21d is reproduced by the sound reproduction device 21. As a result, a sound message with a sound pressure or frequency corresponding to the case of nighttime and there is rain is output from the 32 speakers 1-1 to 1-32.

[0041] -Speaker structure- Next, the structure of the speaker 1 according to this embodiment will be described with reference to Figures 4 to 7. In Figures 4 to 7, the X1 direction is the vehicle traveling direction, and the X2 direction is the vehicle traveling backward.

[0042] The speaker 1 is configured to output sound toward the vehicle lane of the road, thereby suppressing the sound from diffusing outside the road. As shown in Figures 4 to 7, the speaker 1 includes a planar speaker body 11 and wave guide plates 12 to 14.

[0043] The planar speaker body 11 is configured to emit sound from both the front and back sides. As shown in Fig. 4, two grills 11a are provided over most of one side (the side facing the X2 direction) of the planar speaker body 11. A large number of openings are formed in the grills 11a, and sound is output through the openings. Similarly to the one side, two grills (not shown) are provided over most of the other side (the side facing the X1 direction) of the planar speaker body 11. A large number of openings are also formed in the grills, and sound is output through the openings.

[0044] Furthermore, a mounting portion 11b is provided at the lower end of the flat speaker body 11. The mounting portion 11b is configured so as to be mountable to the upper end of a support pole 1a. The support pole 1a is provided so as to extend upward from the roadside ground. The flat speaker body 11 may have the grille 11a on one side and the grille on the other side covered with a waterproof and dustproof sheet (not shown). This waterproof and dustproof sheet has sound permeability.

[0045] Waveguides 12-14 for guiding sound from the grille 11a to a vehicle lane are provided on one surface of the planar speaker body 11. Waveguides 12-14 for guiding sound from the grille to a vehicle lane are provided on the other surface of the planar speaker body 11. Since the waveguides 12-14 on one surface and the waveguides 12-14 on the other surface are configured in substantially the same way, only the waveguides 12-14 on one surface will be described below, and a description of the waveguides 12-14 on the other surface will be omitted.

[0046] Each of the waveguides 12 to 14 is made of, for example, a single metal plate and is detachably attached to one surface of the planar speaker body 11. The waveguide may be made of a metal plate equipped with vibration damping means. In this case, the vibration damping means may be made of a viscoelastic polymeric material layer such as rubber, and may be detachably attached to the metal plate.

[0047] The waveguide 12 is disposed on the lower edge of the planar speaker body 11, and is formed so as to extend from one surface of the planar speaker body 11 towards the X2 direction. This waveguide 12 is disposed, for example, so as to be perpendicular to one surface of the planar speaker body 11. An attachment piece 12a (see FIG. 6) is formed on the end of the waveguide 12 on the X1 direction side. The attachment piece 12a is formed so as to extend downward, and is fastened to one surface of the planar speaker body 11 using, for example, a bolt and a nut. The length of the waveguide 12 in the X2 direction can be adjusted as appropriate.

[0048] The waveguide 13 is disposed on the upper edge of the planar speaker body 11 and is formed so as to extend from one surface of the planar speaker body 11 toward the X2 direction. This waveguide 13 is disposed, for example, so as to be perpendicular to one surface of the planar speaker body 11. The waveguides 12 and 13 are disposed parallel to each other and face each other in the vertical direction with the grill 11a therebetween. An attachment piece 13a is formed on the end of the waveguide 13 on the X1 direction side. The attachment piece 13a is formed so as to extend upward, and is fastened to one surface of the planar speaker body 11 using, for example, a bolt and a nut. The length of the waveguide 13 in the X2 direction can be adjusted as appropriate.

[0049] The waveguide 14 is disposed on the edge (one side edge) of the planar speaker body 11 on the outer side of the road site, and is formed so as to extend from one surface of the planar speaker body 11 to the X2 direction side. As shown in FIG. 6, the waveguide 14 has an attachment piece 14a formed at the end on the X1 direction side, an attachment piece 14b formed at the lower end, and an attachment piece 14c formed at the upper end. The attachment piece 14a is formed so as to extend to the outer side of the road site (the opposite side to the grille 11a), and is fastened to one surface of the planar speaker body 11 by using, for example, a bolt and a nut. The attachment piece 14b is formed so as to extend to the outer side of the road site, and is fastened to the waveguide 12 by using, for example, a bolt and a nut. The attachment piece 14c is formed so as to extend to the outer side of the road site, and is fastened to the waveguide 13 by using, for example, a bolt and a nut. The length of the waveguide 14 in the X2 direction and the angle of the waveguide 14 with respect to one surface of the planar speaker body 11 (the angle between the waveguide 14 and the planar speaker body 11) can be appropriately adjusted. For example, the angle between the waveguide 14 and one surface of the planar speaker body 11 on the grill 11a side (vehicle lane side) is set to within 90 degrees.

[0050] Furthermore, a support arm 15a is provided between one surface of the planar speaker body 11 and the waveguide plate 12, and a support arm 15b is provided between one surface of the planar speaker body 11 and the waveguide plate 13. The support arms 15a and 15b are elongated plates and are arranged on the edge (other side edge) on the vehicle lane side. One end of the support arm 15a is attached to one surface of the planar speaker body 11, and the other end is attached to the waveguide plate 12. One end of the support arm 15b is attached to one surface of the planar speaker body 11, and the other end is attached to the waveguide plate 13.

[0051] -effect- In this embodiment, as described above, the speaker 1 includes the planar speaker body 11 that emits sound from both the front and back sides (the vehicle travel direction and the vehicle reverse travel direction), and the wave guide plates 12-14 that extend from the upper edge, lower edge and one side edge of the planar speaker body 11 along the sound emission direction of the planar speaker body 11 and direct the sound emission direction only to the vehicle traffic lane. This configuration can suppress the sound from diffusing outside the road premises, so that it is possible to suppress noise to nearby residents while notifying them by voice messages.

[0052] Furthermore, in this embodiment, the extension length of the waveguides 12 to 14 from the planar speaker body 11 is variable, so that the directivity of the voice message from the planar speaker body 11 can be adjusted appropriately.

[0053] In addition, in this embodiment, when the waveguide plate includes a vibration damping means, the diffusion of sound can be further suppressed.

[0054] Furthermore, in this embodiment, when the flat speaker body 11 is covered with a waterproof and dustproof sheet, the flat speaker body 11 can be protected from wind, rain, dust, and the like, thereby improving durability.

[0055] In addition, in this embodiment, multiple sound sources 21a to 21d with different sound pressures or frequencies are selected and controlled according to the background noise level, making it possible to appropriately notify the user by voice message while preventing the sound from becoming a noise to neighbors, etc.

[0056] Here, the frequency band of 500Hz to 2kHz tends to be low inside a vehicle. Therefore, in this embodiment, the speaker 1 emits a voice message with a frequency centered between 500Hz and 2kHz, so that the voice message can be easily heard by the vehicle occupants (drivers). In addition, by adding an accent to the vowel "u", the voice message can be made more distinct.

[0057] -Other embodiments- It should be noted that the embodiments disclosed herein are illustrative in all respects and are not intended to be limiting. Therefore, the technical scope of the present invention is not interpreted solely by the above-described embodiments, but is defined by the claims. The technical scope of the present invention includes all modifications within the scope and meaning equivalent to the claims.

[0058] For example, in the above embodiment, an example in which the waveguide plates 12 to 14 are provided has been shown, but the present invention is not limited to this, and it is sufficient that at least one of the waveguide plates 12 to 14 is provided.

[0059] In addition, in the above embodiment, an example has been shown in which the waveguide 12 is perpendicular to one surface of the planar speaker body 11, but this is not limiting, and the angle of the waveguide 12 with respect to one surface of the planar speaker body 11 may be appropriately adjusted. Similarly, an example has been shown in which the waveguide 13 is perpendicular to one surface of the planar speaker body 11, but this is not limiting, and the angle of the waveguide 13 with respect to one surface of the planar speaker body 11 may be appropriately adjusted.

[0060] In addition, in the above embodiment, an example was shown in which the speaker 1 issues a voice message saying "Be careful when driving, there is a traffic jam ahead", but this is not limited to this, and the speaker may issue a voice message with a different content, or the speaker may issue a warning sound other than a voice message.

[0061] In addition, in the above embodiment, an example was shown in which 32 speakers 1-1 to 1-32 were provided in the entire system 100 of the vehicle sound information providing device, but this is not limited to this, and any number of speakers may be provided in the entire system of the vehicle sound information providing device. [Industrial Applicability]

[0062] INDUSTRIAL APPLICABILITY The present invention can be used for a vehicle sound information providing device that is installed on a road where vehicles travel and does not impede the passage of the vehicles, and provides sound information to the occupants of the vehicles. [Explanation of symbols]

[0063] 1. Speaker (vehicle sound information device) 11 Flat speaker body 12 Waveguide 13 Waveguide 14 Waveguide 21a Sound source 21b Sound source 21c Sound Source 21d sound source

Claims

1. A vehicle sound information providing device for providing sound information to occupants of a vehicle, the vehicle sound information providing device being installed at a location on a road on which the vehicle travels that does not impede the passage of the vehicle, and the provision of sound information from the vehicle sound information providing device to the occupants of the vehicle being controlled by a control device, The vehicle sound information providing device includes: The flat speaker body is provided with a front and back surface, and is installed so that one of the front and back surfaces emits sound in a direction along the vehicle travel direction on the road, while the other of the front and back surfaces emits sound in a direction along the vehicle reverse travel direction on the road; A sound information providing device for a vehicle, comprising: a waveguide extending from at least one of the upper edge, lower edge and one side edge of the planar speaker body along the sound radiation direction of the planar speaker body, and directing the sound radiation direction only toward the lane of the vehicle.

2. In the vehicle sound information providing equipment according to claim 1, The vehicle sound information provision device is not placed in a predicted congestion occurrence area that is predicted to be a source of congestion on the road, but is placed in a sound information provision area defined upstream in the vehicle travel direction from the predicted congestion occurrence area.

3. In the vehicle sound information providing equipment according to claim 2, a downstream traffic congestion detection sensor for detecting the occurrence of traffic congestion in the traffic congestion predicted area, and an upstream traffic congestion detection sensor for detecting the occurrence of traffic congestion in the sound information provision area, The control unit controls the provision of sound information from the vehicle sound information providing device to provide sound information to occupants of the vehicle indicating that a traffic jam is occurring in the traffic jam predicted area only when the condition that the upstream traffic jam detection sensor has not detected the occurrence of a traffic jam and the downstream traffic jam detection sensor has detected the occurrence of a traffic jam is met.

4. A vehicle sound information providing device according to any one of claims 1 to 3, 1 is a schematic diagram showing a sound information providing device for a vehicle according to the present invention; FIG. 2 is a schematic diagram showing a sound information providing device for a vehicle according to the present invention; FIG.

5. A vehicle sound information providing device according to any one of claims 1 to 4, 1 is a perspective view of a sound information providing device for a vehicle according to an embodiment of the present invention;

6. A vehicle sound information providing device according to any one of claims 1 to 5, 13. A vehicle sound information providing system, comprising: a waveguide plate formed of a metal plate having a vibration damping means.

7. In the vehicle sound information providing equipment according to claim 6, 13. A sound information providing system for a vehicle, comprising: a vibration damping means configured from a viscoelastic polymer material layer;

8. In the vehicle sound information providing equipment according to claim 6 or 7, 4. A sound information providing system for a vehicle, comprising: a vibration damping means that is detachable from the metal plate;

9. A vehicle sound information providing device according to any one of claims 1 to 8, The flat speaker body is covered with a waterproof and dustproof sheet.

Images