WO2013098983A1

WO2013098983A1 - Sound control device, sound control method, sound control program, and recording medium on which sound control program is recorded

Info

Publication number: WO2013098983A1
Application number: PCT/JP2011/080366
Authority: WO
Inventors: 慎一朗飯野
Original assignee: パイオニア株式会社
Priority date: 2011-12-28
Filing date: 2011-12-28
Publication date: 2013-07-04

Abstract

When a moving body (MV) is stopped, a sound output control unit (750A) determines whether a person is detected in the surroundings of the moving body (MV) by a human detection unit (730). When the results of the determination are positive, the sound output control unit (750A) determines whether a leaking sound of an inside sound to the outside of the moving body (MV) can be recognized by a detected person on the basis of the inside sound and an outside sound detected by a moving body outside sound detection unit (710) and a moving body inside sound detection unit (720) for the moving body (MV). If the results of this determination are positive, the sound output control unit (750A) extracts environmental sound that does not include the leaking sound on the basis of the outside sound and inside sound. Furthermore, the sound output control unit (750A) carries out control in which environmental sound is output by a sound output unit (790). A sound output unit (210) outputs environmental sound according to control by a control unit (150A). Therefore, environmental sound that does not annoy people in the surroundings of the moving body (MV) is output and the degree of recognition of leaking sound outside of the vehicle can be reduced.

Description

Sound control apparatus, sound control method, sound control program, and recording medium on which the sound control program is recorded

The present invention relates to a sound control device, a sound control method, a sound control program, and a recording medium on which the sound control program is recorded.

Conventionally, with respect to moving bodies such as vehicles, various techniques have been proposed for considering the surrounding conditions inside and outside the moving body. Among these techniques, there is a technique for reducing the influence of sound leaking out of the vehicle, such as conversations in the passenger compartment and music being listened to in the passenger compartment.

As one of the technologies to suppress the sound leaking outside the vehicle, the sound generated inside the vehicle is prevented from leaking outside the vehicle, so that pedestrians outside the vehicle are not disturbed. There is one for carrying out conversations in the room and viewing music (refer to Patent Document 1: hereinafter referred to as “conventional example”). In the conventional technique, the volume in the vehicle interior is detected, and the opening degree of an opening / closing part such as a window that partitions the vehicle interior and the outside of the vehicle is adjusted based on the detection result.

JP 2008-163713 A

By the way, in recent years, electric vehicles using batteries as a driving force source have been popularized. Such automobiles have a much lower noise generated by the vehicle than conventional gasoline cars. For this reason, in the case of an electric vehicle, it may be necessary to further consider the leakage sound outside the vehicle.

In the conventional example described above, the influence of leakage sound outside the vehicle is reduced by adjusting the opening degree of the opening / closing part that partitions the vehicle interior and the vehicle exterior. For this reason, depending on the soundproof performance of the moving body, if the volume of the sound generated in the vehicle interior is high, the sound generated in the vehicle interior may leak out of the vehicle. In the technology of the conventional example, the sound leaking out of the vehicle may reach pedestrians and the like around the outside of the vehicle. Such a situation is not preferable from the viewpoint of privacy protection in the vehicle interior space.

For this reason, on the premise that the sound generated inside the vehicle leaks out of the vehicle, by reducing the recognition degree of the leaked sound, it does not bother pedestrians and the like outside the vehicle, and privacy in the vehicle interior space There is a demand for a technique capable of protecting the above. Meeting this requirement is one of the problems to be solved by the present invention.

The present invention has been made in view of the above circumstances, and is a sound control device, a sound control method, a sound control program, and the sound that can output a sound that reduces the degree of recognition of sound leaking outside the vehicle. It is an object to provide a recording medium on which a control program is recorded.

From a first aspect, the present invention provides a moving body external sound detection unit that detects a sound outside the moving body; a moving body sound detection unit that detects a sound inside the moving body; A human detection unit for detecting a person; and a person detected by the human detection unit based on the external sound detected by the mobile external sound detection unit and the internal sound detected by the mobile internal sound detection unit And a sound output control unit that outputs from the sound output unit a sound that reduces the degree of recognition of the sound leaked to the outside of the sound inside the moving body.

From a second aspect, the present invention provides a moving body external sound detection step for detecting a sound outside the moving body; a moving body sound detection step for detecting a sound inside the moving body; A human detection step for detecting a person; and a person detected in the human detection step based on the external sound detected in the mobile external sound detection step and the internal sound detected in the mobile internal sound detection step. And a sound output control step of outputting from the sound output unit a sound that reduces the degree of recognition of the sound leaking to the outside of the sound inside the moving body.

From the third viewpoint, the present invention is a sound control program that causes a calculation unit to execute the sound control method of the present invention.

From the fourth aspect, the present invention is a recording medium in which the sound control program of the present invention is recorded so as to be readable by a calculation unit.

It is a block diagram for demonstrating the structure of the sound control apparatus which concerns on 1st Embodiment of this invention. It is a block diagram for demonstrating the structure of the sound control apparatus which concerns on 2nd Embodiment of this invention. It is a block diagram for demonstrating schematically the structure of the sound control apparatus which concerns on 1st Example of this invention. It is a block diagram which shows the structure of the person detection part of FIG. FIG. 5 is a diagram for explaining an arrangement relationship of an outside-vehicle sound collection unit in FIG. 3, an arrangement relationship of an imaging unit in FIG. It is a flowchart for demonstrating the sound output control process which outputs an "environmental sound" toward the exterior of the vehicle in 1st Example. It is a flowchart for demonstrating the sound output control process which outputs the "reverse phase sound" of a leaking sound toward the exterior of the vehicle in 2nd Example.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description and drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

[First Embodiment]
First, the sound control apparatus 700A according to the first embodiment of the present invention will be described with reference to FIG.

<Configuration>
FIG. 1 shows a schematic configuration of a sound control device 700A according to the first embodiment. As shown in FIG. 1, the sound control device 700A is mounted on an electric vehicle MV (hereinafter referred to as “moving body MV”), a sound output unit 790 equipped on the moving body MV, and a traveling state detection unit 910. And are to be connected.

Here, in the first embodiment, the sound output unit 790 includes a “front speaker” that outputs sound in front of the moving body MV and a “rear speaker” that outputs sound backward. The sound output unit 790 includes a “left speaker” that outputs sound to the left of the moving body MV and a “right speaker” that outputs sound to the right. The sound output unit 790 receives the output sound signal sent from the sound control device 700A. And the sound output part 790 outputs the sound according to an output sound signal toward the periphery of the moving body MV.

The traveling state detection unit 910 detects a traveling state such as the speed of the moving body MV. The detection result by the traveling state detection unit 910 is sent as traveling information to the sound control device 700A.

Next, the configuration of the sound control device 700A will be described. The sound control device 700A includes a moving body sound detection unit 710, a moving body sound detection unit 720, a human detection unit 730, an acquisition unit 740, and a sound output control unit 750A.

The moving body external sound detection unit 710 detects a sound outside the moving body MV. The detection result by the moving object outside sound detection unit 710 is sent to the sound output control unit 750A. In the first embodiment, the human detection unit 730 includes a “front-side human detection unit” disposed on the front side of the moving body MV and a “rear-side human detection unit” disposed on the rear side. . The human detection unit 730 includes a “left side human detection unit” disposed on the left side of the moving body MV and a “right side human detection unit” disposed on the right side.

The moving body sound detecting unit 720 detects the sound inside the moving body MV. The detection result by the moving body sound detection unit 720 is sent to the sound output control unit 750A.

The person detection unit 730 detects the presence or absence of a person around the moving body MV, and detects the distance from the moving body MV to the detected person when the person is detected. The detection result by the human detection unit 730 is sent to the sound output control unit 750A. In the first embodiment, the human detection unit 730 includes a “front-side human detection unit” disposed on the front side of the moving body MV and a “rear-side human detection unit” disposed on the rear side. . The human detection unit 730 includes a “left side human detection unit” disposed on the left side of the moving body MV and a “right side human detection unit” disposed on the right side.

The acquisition unit 740 acquires the travel information related to the travel of the moving body MV detected by the travel state detection unit 910. The acquisition result obtained by the acquisition unit 740 is sent to the sound output control unit 750A.

The sound output control unit 750A receives the detection results sent from the moving body external sound detection unit 710 and the moving body sound detection unit 720. In addition, the sound output control unit 750A receives the detection result sent from the human detection unit 730. Further, the sound output control unit 750A receives the acquisition result sent from the acquisition unit 740.

The sound output control unit 750A is based on the person detected by the human detection unit 730 based on the external sound detected by the moving body external sound detection unit 710 and the internal sound detected by the moving body sound detection unit 720. Sound output control is performed to output from the sound output unit 790 a sound that reduces the degree of recognition of the “leakage sound” to the outside of the sound inside the moving body MV. Such control processing is performed when it is determined that the moving body MV is stopped based on the travel information acquired by the acquisition unit 740.

In the first embodiment, the sound output control unit 750A causes the sound output unit 790 to output an “environmental sound” outside the moving body MV as a sound that reduces the degree of recognition of the leaked sound to the outside. Yes. Here, the external “environmental sound” is a sound similar to the sound around the moving body MV. For example, when the moving body MV is stopped at a construction site, the “environmental sound” may be a construction sound at the construction site. In addition, when the moving body MV is stopped at the amusement park, the “environmental sound” may be a sound generated by an attraction in the amusement park. Details of the control processing by the sound output control unit 750A will be described later.

<Operation>
The operation of the sound control device 700A configured as described above will be described.

In the sound control device 700A, the acquisition unit 740 acquires travel information of the moving body MV. Then, the acquisition unit 740 sends the acquisition result to the sound output control unit 750A. In sound control device 700A, person detecting unit 730 detects the presence or absence of a person around moving body MV. And if the said person is detected, the person detection part 730 will detect the distance from the mobile body MV to the detected person. Subsequently, the person detection unit 730 sends the detection result to the sound output control unit 750A.

Furthermore, in the sound control device 700A, the moving body external sound detection unit 710 detects a sound outside the moving body MV and sends the detection result to the sound output control unit 750A. In addition, the moving body sound detection unit 720 detects the sound inside the moving body MV, and sends the detection result to the sound output control unit 750A.

The sound output control unit 750A that has received these detection results and acquisition results first determines whether the moving body MV is stopped based on the acquisition results sent from the acquisition unit 740. Then, the sound output control unit 750A determines that the “front side human detection unit” and “rear side human detection unit” are based on the detection result sent from the human detection unit 730 when the result of the determination is affirmative. Then, it is determined whether or not a person has been detected around the moving body MV by at least one of the “left side person detection unit” and the “right side person detection unit”.

Subsequently, when the result of the determination is affirmative, the sound output control unit 750A is detected by the “external sound” of the moving body MV detected by the moving body external sound detection unit 710 and the moving body sound detection unit 720. In addition, spectrum analysis of the “internal sound” of the moving body MV is performed, and “environmental sound” and “leakage sound” are extracted from the detected “external sound”. The sound output control unit 750A then detects the detected “person” based on the detected distance between the “person” and the moving body MV, the volume level of the “environmental sound”, and the volume level of the “leakage sound”. It is determined whether “leakage sound” can be recognized.

The determination as to whether or not the “leakage sound” can be recognized is determined such that the “leakage sound” is more easily recognized as the distance between the “person” detected by the human detection unit 730 and the moving body MV is shorter. In addition, the determination of whether or not the “leakage sound” can be recognized is determined such that the smaller the volume level of the “environment sound”, the easier it is to recognize the “leakage sound” and the higher the volume level of the “leakage sound” It is determined that the “leak sound” is easily recognized.

In the first embodiment, when a person is detected by the “front person detection unit”, “environmental sound” and “environment sound” are detected from the “external sound” detected by the “front outside sound detection unit”. "Leakage sound" is extracted. In addition, when a person is detected by the “rear side human detection unit”, “environmental sound” and “leakage sound” are extracted from the “external sound” detected by the “rear side external sound detection unit”. It has become.

In addition, when a person is detected by the “left side human detection unit”, “environmental sound” and “leakage sound” are extracted from the “external sound” detected by the “left side external sound detection unit”. It is supposed to be. In addition, when a person is detected by the “right side human detection unit”, “environmental sound” and “leakage sound” are extracted from the “external sound” detected by the “right side external sound detection unit”. It is supposed to be.

When it is determined that the person is detected by the “front person detection unit” and that the “leak sound” can be recognized by the person, the sound output control unit 750A starts from the “front speaker”. Output environmental sound. In addition, when it is determined that a person is detected by the “rear person detection unit” and that the “leak sound” can be recognized by the person, the sound output control unit 750A starts from the “rear speaker”. Output environmental sound.

When it is determined that a person is detected by the “left side person detecting unit” and the “leak sound” can be recognized by the person, the sound output control unit 750A displays the “left side speaker”. To output environmental sound. If it is determined that the person is detected by the “right side person detecting unit” and the “leak sound” can be recognized by the person, the sound output control unit 750A displays the “right side speaker”. To output environmental sound.

In the output control of “environmental sound”, the sound output control unit 750A should output from the sound output unit 790 based on the level of “environmental sound” and the level of “leakage sound” extracted as described above. Determine the volume level of the ambient sound. The volume level of the “environmental sound” is a volume that does not cause trouble for the detected person on the assumption that the degree of recognition of the “leakage sound” by the detected person is reduced. Then, the sound output control unit 750A generates an output sound signal whose output sound is the environmental sound having the determined volume level. The output sound signal generated in this way is sent to the sound output unit 790.

When the sound output unit 790 receives the output sound signal, the sound output unit 790 outputs an environmental sound. Here, the environmental sound is output from the “front speaker” toward the front of the moving body MV. In addition, an environmental sound is output from the “rear speaker” toward the rear of the moving body MV. In addition, an environmental sound is output from the “left speaker” toward the left side of the moving body MV. In addition, an environmental sound is output from the “right speaker” toward the right side of the moving body MV. As a result, under the control of the sound output control unit 750A, an environmental sound that reduces the degree of recognition of “leakage sound” is output toward the detected “person”.

In the first embodiment, the sound output control unit 750A detects the “external sound” detected by the moving body external sound detection unit 710 and the moving body sound after the environmental sound is output from the sound output unit 790. The “internal sound” detected by the unit 720 is collected. Then, the sound output control unit 750A analyzes the collected “external sound” and “internal sound” and determines whether the “leakage sound” is difficult to be recognized by the detected “person”. If the result of the determination is negative, the volume level of the environmental sound to be output from the sound output unit 790 is determined again.

As described above, in the first embodiment, the person detection unit 730 detects a person around the moving body MV, and when the person is detected, the distance from the moving body MV to the detected person. Is detected. Further, the moving body external sound detection unit 710 detects a sound outside the moving body MV, and the moving body sound detection unit 720 detects a sound inside the moving body MV. When it is determined from the travel information acquired by the acquisition unit 740 that the moving body MV is stopped, the sound output control unit 750A is based on the detection result of the person detection unit 730, and the person around the moving body MV It is determined whether or not is detected. Then, when the result of the determination is affirmative, the sound output control unit 750A uses the detected “person” based on the “external sound” and the “internal sound” of the mobile object MV. It is determined whether or not “leak” to the outside of the sound inside the MV can be recognized.

When the result of the determination is affirmative, the sound output control unit 750A determines that the mobile body MV does not include a leakage sound based on the detected “external sound” and “internal sound” of the mobile body MV. Extract "environmental sound" outside of. The sound output control unit 750 A performs control to output “environmental sound” from the sound output unit 790 toward the person detected by the person detection unit 730. In accordance with the control by the sound output control unit 750A, the sound output unit 790 outputs an environmental sound toward a person around the moving body MV.

Therefore, according to the first embodiment of the present invention, it is possible to output an environmental sound having a volume that does not cause a sense of incongruity for people around the moving body MV, and to reduce the degree of recognition of sound leaking outside the vehicle.

[Second Embodiment]
Next, a sound control device 700B according to a second embodiment of the present invention will be described with reference to FIG.

<Configuration>
FIG. 2 shows a schematic configuration of a sound control device 700B according to the second embodiment. As shown in FIG. 2, the sound control device 700B is different from the sound control device 700A of the first embodiment described above only in that a sound output control unit 750B is provided instead of the sound output control unit 750A. . Hereinafter, description will be made mainly focusing on these differences.

The sound output control unit 750B is sent from the moving body external sound detection unit 710, the moving body sound detection unit 720, and the human detection unit 730, as in the case of the sound output control unit 750A of the first embodiment described above. Receive the detection results. The sound output control unit 750B receives the acquisition result sent from the acquisition unit 740.

Then, the sound output control unit 750B, based on the detected “external sound” and “internal sound”, sounds that reduce the degree of recognition of “leakage sound” by the person detected by the person detection unit 730, Sound output control to be output from the sound output unit 790 is performed. In the second embodiment, the sound output control unit 750 B performs control to output a “reverse phase sound” of the leaked sound from the sound output unit 790 as a sound that reduces the degree of recognition of the leaked sound to the outside. Details of the control processing by the sound output control unit 750B will be described later.

<Operation>
The operation of the sound control device 700B configured as described above will be described.

In the sound control device 700B, the acquisition unit 740 acquires the travel information of the moving body MV as in the case of the first embodiment. Then, the acquisition unit 740 sends the travel information to the sound output control unit 750B. In addition, the person detection unit 730 detects the presence or absence of a person around the moving body MV. And if the said person is detected, the person detection part 730 will detect the distance from the mobile body MV to the detected person. Subsequently, the person detection unit 730 sends the detection result to the sound output control unit 750B.

Further, in the sound control device 700B, as in the case of the first embodiment, the moving object external sound detection unit 710 detects the sound outside the moving object MV and sends the detection result to the sound output control unit 750B. The body sound detection unit 720 detects the sound inside the moving body MV and sends the detection result to the sound output control unit 750B.

The sound output control unit 750B that has received these detection results and acquisition results determines whether the moving body MV is stopped as in the case of the first embodiment, and the determination result is affirmative. In addition, based on the detection result sent from the human detection unit 730, the “front side human detection unit”, “rear side human detection unit”, “left side human detection unit” and “right side human detection unit” It is determined by at least one person detection unit whether or not a person has been detected around the moving body MV. Subsequently, when the result of the determination is affirmative, the sound output control unit 750B analyzes the “external sound” and “internal sound” of the moving body MV as in the case of the first embodiment. Then, “environmental sound” and “leakage sound” are extracted from the detected “external sound”. The sound output control unit 750B then detects the detected “person” based on the detected distance between the “person” and the moving body MV, the volume level of the “environmental sound”, and the volume level of the “leakage sound”. It is determined whether “leakage sound” can be recognized.

When it is determined that the “leak sound” can be recognized by the detected person, the sound output control unit 750B causes the leak sound from a speaker that can output sound in the direction in which the person is detected. Controls to output the “sound of opposite phase”.

In the output control of the “reverse phase sound” of the leaked sound, the sound output control unit 750B performs the “reverse” of the leaked sound equivalent to the level based on the level of the “leakage sound” extracted as described above. Determine the volume level of the “phase sound”. Then, the sound output control unit 750 B generates an output sound signal using the “reverse phase sound” of the leaked sound having the determined volume level as an output sound, and sends the output sound signal to the sound output unit 790.

When receiving the output sound signal, the sound output unit 790 outputs a reverse phase sound of the leaking sound. Here, the reverse phase sound of the leaking sound is output from the “front speaker” toward the front of the moving body MV. Further, from the “rear speaker”, a reverse phase sound of the leaking sound is output toward the rear of the moving body MV. In addition, a reverse phase sound of the leaking sound is output from the “left speaker” toward the left side of the moving body MV. In addition, a reverse phase sound of leakage sound is output from the “right speaker” toward the right side of the moving body MV. As a result, under the control of the sound output control unit 750B, the reverse phase sound of the leaking sound that reduces the recognition degree of the “leaking sound” is output toward the detected “person”.

As described above, in the second embodiment, as in the case of the first embodiment described above, when it is determined from the travel information acquired by the acquisition unit 740 that the moving body MV is stopped, Based on the detection result by the person detection unit 730, it is determined whether or not a person has been detected around the moving body MV. Then, when the result of the determination is affirmative, the sound output control unit 750B performs “external sound” and “internal sound” of the moving body MV detected by the moving body external sound detection section 710 and the moving body sound detection section 720. Based on the “sound”, it is determined whether the detected “person” can recognize the “leak sound” to the outside of the sound inside the moving body MV.

When the result of the determination is affirmative, the sound output control unit 750B extracts “leakage sound” based on the detected “external sound” and “internal sound”. The sound output control unit 750 B performs control to output a “reverse phase sound” of the leakage sound from the sound output unit 790 toward the person detected by the person detection unit 730. In accordance with the control by the sound output control unit 750B, the sound output unit 790 outputs a reverse phase sound of leakage sound toward a person around the moving body MV.

Therefore, according to 2nd Embodiment of this invention, the reverse phase sound of the leaking sound which does not cause trouble to the person around the moving body MV can be output, and the recognition degree of the leaking sound outside a vehicle can be reduced. .

[Modification of Embodiment]
In the first and second embodiments described above, the sound output control unit is based on the external sound detected by the mobile external sound detection unit and the internal sound detected by the mobile internal sound detection unit. When it is determined that a leak sound can be recognized by a person detected by the human detection unit, a sound that reduces the recognition level of the leak sound is output from the sound output unit. On the other hand, the sound output control unit causes the sound output unit to output a sound that reduces the recognition level of the leaked sound when the level of the sound detected by the moving body sound detection unit is equal to or higher than a predetermined value. You may do it.

In the first and second embodiments described above, the sound output control unit outputs a sound for reducing the degree of recognition of “leakage sound” from the sound output unit when it is determined that the moving body is stopped. The sound output control to be output was performed. In contrast, the sound output control unit reduces the degree of recognition of “leakage sound” when it is determined that the moving body is moving at a predetermined speed or less based on the travel information acquired by the acquisition unit. You may make it perform sound output control which outputs a sound from a sound output part.

Here, the “predetermined speed” is the maximum speed at which the surrounding person can recognize the semantic content of the “leakage sound”.

In the first and second embodiments described above, the human detection unit and the sound output unit are arranged on the front and rear and on the left and right of the moving body. On the other hand, you may make it arrange | position a 1 or several person detection part and a sound output part in the at least 1 direction side of the front, back, left side, and right side of a moving body. Moreover, you may make it arrange | position a human detection part and a sound output part in other direction sides, such as the front left side, front right side, back left side, back right side, etc. of a mobile body.

In the first and second embodiments described above, the sound control device is not provided with a sound output unit. However, if there is no existing sound output unit that can be used, the sound control device has a sound output unit. It is good also as a structure provided.

In the first and second embodiments described above, all the components of the sound control device are mounted on the moving body. On the other hand, it is good also as a structure which makes a server apparatus arrange | positioned at a remote place provide a sound output control part, and mounts the terminal device which can communicate with the said server apparatus in a mobile body.

In the above embodiment, the present invention is applied to an apparatus mounted on an electric vehicle. However, the present invention can of course be applied to an apparatus mounted on a moving body such as a hybrid vehicle or a gasoline vehicle. It is.

The sound output control unit of the sound control device of the first and second embodiments described above is configured as a computer as a calculation unit including a central processing unit (CPU: Central Processing Unit) and the like, and a program prepared in advance May be executed by the computer to execute part or all of the processing in the incoming call processing device. This program is recorded on a computer-readable recording medium such as a hard disk, CD-ROM, or DVD, and is loaded from the recording medium and executed by the computer. The program may be acquired in a form recorded on a portable recording medium such as a CD-ROM or DVD, or may be acquired in a form distributed via a network such as the Internet. Also good.

Hereinafter, embodiments of the acoustic device of the present invention will be described with reference to FIGS. In the following description and drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

[First embodiment]
First, a first embodiment of the present invention will be described with reference mainly to FIGS.

<Configuration>
FIG. 3 shows a schematic configuration of the sound control apparatus 100A according to the first embodiment. The sound control device 100A is an aspect of the sound control device 700A (see FIG. 1) of the first embodiment described above.

Sound control device 100A is mounted on a vehicle CR that travels on a road using an electric motor as a drive mechanism. The vehicle CR is equipped with a sound output unit 210 as a sound output unit 790 connected to the sound control device 100A, a vehicle speed sensor 220 as a traveling state detection unit 910, and an ECU (Electrical Control Unit) 230. Yes.

Here, the sound output unit 210 includes a speaker 211 _F that outputs sound toward the front of the vehicle CR, a speaker 211 _B that outputs sound toward the rear of the vehicle CR, and a left direction of the vehicle CR. a speaker 211 _L for outputting sound Te is configured to include a speaker 211 _R for outputting sound toward the right side of the vehicle CR.

Each speaker constituting the sound output unit 210 receives an output sound signal sent from the sound control device 100A. And each speaker outputs the sound which reduces the "leakage sound" to the exterior of the sound inside vehicle CR according to the said output sound signal. The positions of the speakers 211 _F , 211 _B , 211 _L , 211 _R in the first embodiment will be described later.

The vehicle speed sensor 220 detects the rotation of the wheel or axle of the vehicle CR. A vehicle speed detection result by the vehicle speed sensor 220 is sent to the ECU 230.

The ECU 230 controls the traveling of the vehicle CR and collects detection results from various sensors that detect the state of the vehicle CR. In the first embodiment, the detection result collected by the ECU 230 includes the vehicle speed detection result by the vehicle speed sensor 220. The ECU 230 sends the vehicle speed detection result to the sound control device 100A through an in-vehicle communication network that operates according to a communication protocol such as CAN (Controller Area Network).

Next, the configuration of the sound control device 100A will be described. As shown in FIG. 3, the sound control device 100 A includes an outside sound collection unit 110 as a moving body outside sound detection unit 710, an inside sound collection unit 120 as a moving body sound detection unit 720, and a person detection unit 730. And a human detection unit 130. The sound control device 100A includes a travel information acquisition unit 140 as an acquisition unit 740 and a control unit 150A as a sound output control unit 750A.

The outside-vehicle sound collection unit 110 collects sound outside the vehicle CR. In the first embodiment, the outside-vehicle sound collection unit 110 includes four individual outside-vehicle

sound collection units

111 _F , 111 _B , 111 _L , and 111 _R (see FIG. 6 described later).

The individual vehicle outside sound collection unit 111 _F includes a sound collection device such as a microphone. The individual vehicle outside sound collection unit 111 _F collects sound around the front of the vehicle CR and sends the sound collection result to the control unit 150A.

The individual vehicle outside sound collection unit 111 _B is configured to include a sound collection device such as a microphone, like the individual vehicle outside sound collection unit 111 _F. Individual exterior sound pickup unit 111 _B is to pick up the sound of the front periphery of the vehicle CR, and sends the sound collection result to the control unit 150A.

The individual vehicle outside sound collection unit 111 _L is configured to include a sound collection device such as a microphone, similarly to the individual vehicle outside

sound collection units

111 _F and 111 _B. The individual vehicle outside sound collection unit 111 _L collects sound around the front of the vehicle CR, and sends the sound collection result to the control unit 150A.

The individual vehicle outside sound collection unit 111 _R is configured to include a sound collection device such as a microphone, like the individual vehicle outside

sound collection units

111 _F , 111 _B , and 111 _L. The individual vehicle outside sound collection unit 111 _R collects sound around the front of the vehicle CR, and sends the sound collection result to the control unit 150A.

The arrangement positions of the individual vehicle outside

sound collection units

111 _F , 111 _B , 111 _L , 111 _R in the first embodiment will be described later.

The in-vehicle sound collection unit 120 includes a sound collection device such as a microphone installed at a predetermined position such as a headrest of a driver's seat in the passenger compartment of the vehicle CR. This in-vehicle sound collection unit 120 collects the sound that has reached the sound collection device, and sends the sound collection result to the control unit 150A. The in-vehicle sound collection unit 120 collects sound inside the vehicle CR.

The above-described human detection unit 130 detects “persons” such as pedestrians around the vehicle CR and drivers on other vehicles. And the person detection part 130 detects the distance to the detected person from vehicle CR, when a person is detected. The detection result by the person detection unit 130 is sent to the control unit 150A as a determination flag indicating whether or not “person” has been detected and the distance from the vehicle CR to the person. The detailed configuration of the person detection unit 130 will be described later.

The travel information acquisition unit 140 receives the vehicle speed detection result sent from the ECU 230. Then, the travel information acquisition unit 140 converts the vehicle speed detection result into a signal in a form that can be handled by the control unit 150A, and sends the signal to the control unit 150A as vehicle speed information.

The control unit 150A includes a central processing unit (CPU). The control unit 150A performs a sound output control process of “environmental sound” toward the periphery of the vehicle CR in the sound control device 100A by executing a predetermined program. The sound output control process by the control unit 150A will be described later.

<< Configuration of Human Detection Unit 130 >>
Next, the configuration of the above-described human detection unit 130 will be described. As shown in FIG. 4, the human detection unit 130 includes photographing

units

131 _F , 131 _B , 131 _L , 131 _R , a storage unit 132, and a human determination unit 133.

The photographing unit 131 _F includes a photographing camera. Capturing unit 131 _F performs forward shooting vehicle CR. Then, the photographing unit 131 _F sends the photographing result to the person determining unit 133 as digital photographing data.

The photographing unit 131 _B includes a photographing camera, like the photographing unit 131 _F. Capturing unit 131 _B performs behind the photographing of the vehicle CR. Then, the photographing unit 131 _B sends the photographing result to the person determining unit 133 as digital photographing data.

The photographing unit 131 _L includes a photographing camera, like the photographing

units

131 _F and 131 _B. The imaging unit 131 _L performs imaging on the left side of the vehicle CR. Then, the imaging unit 131 _L sends the imaging result to the person determination unit 133 as digital imaging data.

The photographing unit 131 _R includes a photographing camera, similar to the photographing

units

131 _F , 131 _B , and 131 _L. The imaging unit 131 _R performs imaging on the right side of the vehicle CR. Then, the imaging unit 131 _R sends the imaging result to the person determination unit 133 as digital imaging data.

The arrangement positions of the photographing

units

131 _F , 131 _B , 131 _L , 131 _R in the first embodiment will be described later.

The storage unit 132 includes a memory element, and stores template information TPI for human recognition. The storage unit 160 can be accessed by the control unit 150A.

The person determination unit 133 receives the shooting data sent from each of the shooting

units

131 _F , 131 _B , 131 _L , and 131 _R. And the person determination part 133 collates the template information TPL in the memory | storage part 132, and whether a person, such as a boarding person, exists in the imaging | photography visual field of each imaging | photography part in a vehicle. judge. The result of this determination is sent to the control unit 150A as a determination flag.

In the first embodiment, the person determination unit 133 sets the determination flag to “ON” when it is determined that a person exists, and when it is determined that no person exists. The determination flag is set to “OFF”.

In addition, when it is determined that a person exists, the person determination unit 133 further analyzes the image indicated by the shooting data and calculates the distance from the vehicle CR to the person. The calculated distance is sent to the control unit 150A.

Note that the determination flag and the distance include the identification information of the photographing unit.

<< Individual external sound detection unit, photographing unit and speaker arrangement position >>
The above-described individual vehicle outside

sound collection units

111 _F , 111 _B , 111 _L , 111 _R , photographing

units

131 _F , 131 _B , 131 _L , 131 _R , and speakers 211 _F , 211 _B , 211 _L , 211 _R The arrangement relationship in one embodiment is shown in FIG. As shown in FIG. 5, the individual vehicle outside sound collection unit 111 _F , the photographing unit 131 _F, and the speaker 211 _F are arranged on the front side of the vehicle CR. In addition, the individual vehicle outside sound collection unit 111 _B , the photographing unit 131 _B, and the speaker 211 _B are disposed on the rear side of the vehicle CR.

Furthermore, the individual vehicle outside sound collection unit 111 _L , the photographing unit 131 _L, and the speaker 211 _L are arranged on the left side of the vehicle CR. The individual vehicle outside sound collection unit 111 _R , the photographing unit 131 _R, and the speaker 211 _R are disposed on the right side of the vehicle CR.

<Operation>
The operation of the sound control apparatus 100A configured as described above will be described mainly focusing on the sound output control processing of “environmental sound” by the control unit 150A.

In the sound control device 100A, the travel information acquisition unit 140 receives the vehicle speed detection result sent from the ECU 230. Then, the travel information acquisition unit 140 generates vehicle speed information in which the vehicle speed detection result is converted into a form that can be handled by the control unit 150A, and sends the generated vehicle speed information to the control unit 150A (see FIG. 3).

In addition, each of the individual vehicle outside

sound collection units

111 _F , 111 _B , 111 _L , 111 _R constituting the vehicle outside sound collection unit 110 collects an “external sound” of the vehicle CR and controls the sound collection result to the control unit 150A. The sound collection unit 120 in the vehicle collects “internal sound” of the vehicle CR and sends the sound collection result to the control unit 150A (see FIG. 3).

In addition, the person determination unit 133 in the person detection unit 130 receives the shooting data sent from each of the shooting

units

131 _F , 131 _B , 131 _L , 131 _R. Then, the person determination unit 133 collates the template information TPL in the storage unit 132, analyzes the image indicated by the captured data, sets the determination flag, and sets the determination flag to “ON”. The distance is calculated. The determination flag set in this way and the calculated distance are sent to the control unit 150A (see FIGS. 3 and 4).

In addition, when there are a plurality of “persons” in the shooting data shot by one shooting unit, the person determination unit 133 calculates a distance to each of the plurality of “people”. Then, the person determination unit 133 specifies the “person” whose calculated distance is the shortest, and specifies the distance to the specified “person” as the distance.

The output control process of “environmental sound” is executed by the control unit 150A that receives the vehicle speed information sent from the travel information acquisition unit 140 and the determination flag and distance sent from the person determination unit 133 as described above. The Initially, it is assumed that no sound is output from the speaker.

In the “environmental sound” output control process, as shown in FIG. 6, first, in step S11, the speed of the vehicle CR is “0” based on the newly received vehicle speed information by the control unit 150A. It is determined whether or not. If the result of this determination is negative (step S11: N), the process proceeds to step S12.

In step S12, the control unit 150A determines whether or not sound is currently being output from any of the speakers 211 _F , 211 _B , 211 _L , and 211 _{R at} the present time. If the result of the determination in step S12 is negative (step S12: N), the process returns to step S11. On the other hand, when the result of the determination in step S12 is affirmative (step S12: Y), the process proceeds to step S13. In step S13, control unit 150A stops the sound output from the speaker outputting the sound. Thereafter, the process returns to step S11.

If the result of the determination in step S11 described above is affirmative (step S11: Y), the process proceeds to step S14. In step S14, control unit 150A determines whether or not “person” is detected around vehicle CR based on the new determination flag and distance sent from person detection unit 130. If the result of this determination is negative (step S14: N), the process proceeds to step S12 described above.

On the other hand, when the result of the determination in step S14 is affirmative (step S14: Y), the process proceeds to step S15. In step S 15, the control unit 150 A has a spectrum of “external sound” of the vehicle CR collected by the outside sound collection unit 110 and “internal sound” of the vehicle CR collected by the in-vehicle sound collection unit 120. Analysis is performed, and “environmental sound” and “leakage sound” are extracted from the collected “external sound”. Then, based on the detected distance between the “person” and the vehicle CR, the volume level of the “environmental sound”, and the volume level of the “leakage sound”, the control unit 150A performs “leakage sound” by the detected “person”. "Can be recognized.

In such a determination, the control unit 150A, when a person is detected by the photographing data by the imaging unit 131 _F is picked up by the individual outside sound pickup unit 111 _F from "external sound" and "environmental sound,"""Leakagesound" is extracted. The control unit 150A, when a person is detected by the photographing data by the imaging unit 131 _B is "leak sound as" environmental sound "from the" external sound "picked up by the individual outside sound pickup unit 111 _B ”Is extracted.

The control unit 150A, when a person is detected by the photographing data by the imaging unit 131 _L is "leak sound as" environmental sound 'from being picked up by the individual outside sound pickup unit 111 _L "external sound" ”Is extracted. The control unit 150A, when a person is detected by the photographing data by the imaging unit 131 _R is "leak sound as" environmental sound 'from being picked up by the individual outside sound pickup unit 111 _R "external sound" ”Is extracted.

If the result of the determination in step S15 is negative (step S15: N), the process returns to step S11. On the other hand, when the result of the determination in step S15 is affirmative (step S15: Y), the process proceeds to step S16.

In step S16, the control unit 150A performs a new output process of “environmental sound”. In such “environmental sound” output processing, the control unit 150A is configured to output an environment to be output from the sound output unit 210 based on the “environmental sound” level and the “leakage sound” level extracted as described above. Determine the volume level of the sound. Then, the control unit 150A generates an output sound signal that uses the environmental sound having the determined volume level as an output sound.

The output sound signal thus generated is sent to the speaker of the sound output unit 210 that can output the sound in the direction in which the “person” is detected. As a result, “environmental sound” is output from the speaker that has received the output sound signal sent from the control unit 150A. Thereafter, the process returns to step S11.

Thereafter, the processing of steps S11 to S16 described above is repeated, and sound output control processing of “environmental sound” is performed.

As described above, in the first embodiment, when the speed of the vehicle CR is “0”, the control unit 150A controls the photographing

units

131 _F , 131 _B , and 131 disposed at the front and rear and the left and right of the vehicle CR. Based on the image data sent from _L and 131 _R , it is determined whether or not a “person” has been detected around the vehicle CR. Further, the control unit 150A collects “external sound” of the vehicle CR collected by the outside sound collection unit 110 and collects “inside sound” of the vehicle CR collected by the in-vehicle sound collection unit 120. To do. Based on the “external sound” and “internal sound” of the vehicle CR, the control unit 150A causes the “person” detected by the human detection unit 130 to “leak” the sound inside the vehicle CR to the outside. Determine whether can be recognized.

When the result of the determination is affirmative, the control unit 150A causes the “external sound” collected by the outside sound collection unit 110 and the “inside sound” collected by the inside sound collection unit 120 to be collected. Based on the above, an “environmental sound” outside the vehicle CR that does not include a leakage sound is extracted. And 150 A of control parts perform control which outputs an environmental sound from the sound output part 210 toward the person detected by the person detection part 130. FIG. In accordance with the control by the control unit 150A, the sound output unit 210 outputs an environmental sound toward people around the vehicle CR.

Therefore, according to the first embodiment, it is possible to output an environmental sound having a volume that does not cause a sense of incongruity for people around the vehicle CR, and to reduce the degree of recognition of sound leaking outside the vehicle.

Further, according to the first embodiment, even if a person detected by the person detection unit 130 records a sound including a leaking sound from the vehicle interior using a portable recording device such as an IC recorder, the portable The sound reproduced by the type recording apparatus has a reduced degree of recognition of conversation in the passenger compartment. For this reason, it is possible to further protect the privacy in the vehicle interior space.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference mainly to FIG.
<Configuration>
The sound control apparatus according to the second embodiment is different from the sound control apparatus 100A (see FIG. 3) of the first embodiment described above only in that a “control section 150B” is provided instead of the control section 150A. . Hereinafter, the sound control device according to the second embodiment having a difference from the sound control device 100A will be referred to as a “sound control device 100B”. The sound control device 100B is an aspect of the sound control device 700B (see FIG. 2) of the second embodiment described above.

The control unit 150B includes a central processing unit (CPU) similarly to the control unit 150A described above. Similar to the above-described control unit 150A, the control unit 150B obtains the sound collection results sent from the vehicle outside sound collection unit 110 and the vehicle sound collection unit 120, the detection results sent from the person detection unit 130, and the travel information acquisition. The vehicle speed information sent from the unit 140 is received. In the second embodiment, the control unit 150 B performs control to output a “reverse phase sound” of the leaked sound from the sound output unit 210 as a sound that reduces the degree of recognition of the leaked sound to the outside. The sound output control process of the “reverse phase sound” by the control unit 150B will be described later.

<Operation>
The operation of the sound control device 100B configured as described above will be described mainly focusing on the sound output control processing of the “inverse phase sound” of the environmental sound by the control unit 150B.

In the sound control device 100B, as in the case of the first embodiment, the travel information acquisition unit 140 receives the vehicle speed detection result sent from the ECU 230. Then, the travel information acquisition unit 140 generates vehicle speed information in which the vehicle speed detection result is converted into a form that can be handled by the control unit 150B, and sends the vehicle speed information to the control unit 150B.

Similarly to the case of the first embodiment, each of the individual vehicle outside

sound collection units

111 _F , 111 _B , 111 _L , 111 _R constituting the vehicle outside sound collection unit 110 collects the “external sound” of the vehicle CR. The sound collection result is sent to the control unit 150B, and the vehicle interior sound collection unit 120 collects the “internal sound” of the vehicle CR and sends the sound collection result to the control unit 150B.

In addition, the person determination unit 133 receives the shooting data sent from each of the shooting

units

131 _F , 131 _B , 131 _L , 131 _R as in the case of the first embodiment. The person determination unit 133 analyzes the image indicated by the captured data, sets a determination flag, and calculates a distance when the determination flag is set to “ON”. And person judgment part 133 sends a judgment flag and distance to control part 150B.

The sound output control process of the “reverse phase sound” of the environmental sound is a control that receives the vehicle speed information sent from the travel information acquisition unit 140 as described above, and the determination flag and distance sent from the person determination unit 133. This is executed by the unit 150B. It is assumed that no sound is output from the speaker at the beginning.

In the output control processing of the “reverse phase sound” of the leaking sound, as shown in FIG. 7, first, in step S21, the control unit 150B performs the same as in step S11 (see FIG. 6) in the first embodiment. It is determined whether or not the speed of the vehicle CR is “0” based on the newly received vehicle speed information. If the result of this determination is negative (step S21: N), the process proceeds to step S22.

In step S22, the control unit 150B determines whether or not sound is currently being output from any of the speakers 211 _F , 211 _B , 211 _L , and 211 _R as in step S12 in the first embodiment. . If the result of this determination is negative (step S22: N), the process returns to step S21. On the other hand, if the result of the determination in step S22 is affirmative (step S22: Y), the process proceeds to step S23. In step S23, the control unit 150B stops the sound output from the speaker outputting the sound, similarly to step S13 in the first embodiment. Thereafter, the process returns to step S21.

If the result of the determination in step S21 described above is affirmative (step S21: Y), the process proceeds to step S24. In step S24, as in step S14 in the first embodiment, the control unit 150B has detected “person” around the vehicle CR based on the new determination flag and distance sent from the person detection unit 130. Determine whether or not. If the result of this determination is negative (step S24: N), the process proceeds to step S22 described above.

On the other hand, when the result of the determination in step S24 is affirmative (step S24: Y), the process proceeds to step S25. In step S25, the control unit 150B collects the “external sound” of the vehicle CR collected by the outside-vehicle sound collecting unit 110 and the in-vehicle sound collecting unit 120, as in step S15 in the first embodiment. Then, the spectrum analysis of the “internal sound” of the vehicle CR is performed, and “environmental sound” and “leakage sound” are extracted from the collected “external sound”. Then, based on the detected distance between the “person” and the vehicle CR, the volume level of the “environmental sound”, and the volume level of the “leakage sound”, the control unit 150B performs “leakage sound” by the detected “person”. "Can be recognized.

If the result of the determination in step S25 is negative (step S25: N), the process returns to step S21 described above. On the other hand, when the result of the determination in step S25 is affirmative (step S25: Y), the process proceeds to step S26.

In this step S26, the control unit 150B performs a new output process of the “reverse phase sound” of the leakage sound. In the output process of the “reverse phase sound”, the control unit 150B determines the volume of the “reverse phase sound” of the leak sound that is equivalent to the level based on the level of the “leak sound” extracted as described above. Determine the level. Then, the control unit 150B generates an output sound signal that uses the “reverse phase sound” of the leaked sound at the determined volume level as an output sound.

The output sound signal thus generated is sent to the speaker of the sound output unit 210 that can output the sound in the direction in which the “person” is detected. As a result, a “reverse phase sound” of the leaking sound is output from the speaker that has received the output sound signal sent from the control unit 150B. Thereafter, the process returns to step S21.

Thereafter, the processing of the above steps S21 to S26 is repeated, and the sound output control processing of the “reverse phase sound” of the leaking sound is performed.

As described above, in the second embodiment, when the speed of the vehicle CR is “0”, the control unit 150B causes the photographing

units

131 _F , 131 _B , and 131 disposed at the front and rear and the left and right of the vehicle CR. Based on the image data sent from _L and 131 _R , it is determined whether or not a “person” has been detected around the vehicle CR. The control unit 150B collects “external sound” of the vehicle CR collected by the outside sound collection unit 110 and collects “inside sound” of the vehicle CR collected by the in-vehicle sound collection unit 120. To do. Based on the “external sound” and “internal sound” of the vehicle CR, the control unit 150B causes the “person” detected by the human detection unit 130 to “leak” the sound inside the vehicle CR to the outside. Determine whether can be recognized.

When the result of the determination is affirmative, the control unit 150B extracts “leakage sound” based on the collected “external sound” and “internal sound”. And the control part 150B performs control which outputs the sound of the reverse phase of a leaking sound from the sound output part 210 toward the person detected by the person detection part 130. FIG. In accordance with the control by the control unit 150B, the sound output unit 210 outputs a sound having a phase opposite to that of the leakage sound toward the people around the vehicle CR.

Therefore, according to the second embodiment, it is possible to output a reverse phase sound of a leaking sound that does not bother people around the vehicle CR, and to reduce the degree of recognition of the leaking sound outside the vehicle.

Further, according to the second embodiment, even if a person detected by the person detecting unit 130 records a sound including a leaking sound from the vehicle interior using the portable recording device, the portable recording device The reproduced sound has a reduced degree of recognition of conversation in the passenger compartment. For this reason, it is possible to further protect the privacy in the vehicle interior space.

[Modification of Example]
The present invention is not limited to the above-described embodiments, and various modifications can be made.

For example, in the first and second embodiments described above, all the components of the sound control device are arranged in the vehicle CR. However, the server device capable of communicating with the terminal device on which the vehicle CR is mounted has a sound control function. You may make it provide all or one part of the component of an apparatus.

In the first and second embodiments, the sound control device is configured as a single device. However, for example, the function of the sound control device of the present invention may be implemented in a car navigation device. .

In the first and second embodiments, the control unit detects the person based on the external sound collected by the outside sound collecting unit and the internal sound collected by the inside sound collecting unit. When it is determined that the leak sound can be recognized by the person detected by the section, the sound output section outputs a sound for reducing the recognition degree of the leak sound. On the other hand, the control unit causes the sound output unit to output a sound for reducing the degree of recognition of the leaking sound when the level of the internal sound collected by the in-vehicle sound collecting unit is equal to or higher than a predetermined value. You may do it.

In the first and second embodiments described above, the control unit performs spectrum analysis of “external sound” and “internal sound” of the collected vehicle, and from the collected “external sound”. "Environmental sound" and "leakage sound" were extracted. On the other hand, the control unit does not perform spectrum analysis of the “external sound” and “internal sound” of the collected vehicle, and the waveform of the “external sound” and “internal sound” in the time domain. Therefore, “environmental sound” and “leakage sound” may be extracted.

In the first and second embodiments, the control unit detects “person” around the vehicle without distinguishing the attributes of “person” such as “male”, “female”, and “child”. When it is done, the control to output the sound is performed. On the other hand, the attribute of “person” may be distinguished, and for example, sound output may be performed when “male” is detected. In this case, the configuration may be adopted in which the user designates the attribute of “person”.

In the first and second embodiments described above, the control unit outputs a sound that reduces the degree of recognition of “leakage sound” from the sound output unit when it is determined that the vehicle is stopped. Output control was performed. On the other hand, when it is determined that the vehicle is traveling at a predetermined speed or less, the control unit performs sound output control for outputting a sound for reducing the recognition degree of “leakage sound” from the sound output unit. You may do it.

Here, the “predetermined speed” is the maximum speed at which the surrounding people can recognize the meaning of the “leakage sound”, and is determined in advance based on experiments, simulations, experiences, and the like.

Further, in the first and second embodiments described above, an individual outside-vehicle sound collection unit that collects sound outside the vehicle, a photographing unit for photographing people around the vehicle, and a speaker that outputs sound, It was arranged at the front and rear and left and right of the vehicle. On the other hand, you may make it arrange | position a 1 or several separate vehicle outside sound collection part, imaging | photography part, and a speaker in the at least 1 direction side of the front, back, left side, and right side of a vehicle. In addition, an individual vehicle outside sound collection unit, a photographing unit, and a speaker may be arranged on other direction sides such as the front left side, the front right side, the rear left side, and the rear right side of the vehicle.

In the first and second embodiments described above, the person detection unit images the surroundings of the vehicle, and detects people around the vehicle based on the imaging result. However, a human sensor using infrared rays or the like is used. It may be used to detect people around the vehicle.

In the first and second embodiments, the sound control device is not provided with the sound output unit 210. However, if there is no existing sound output unit 210 that can be used, the sound control device outputs the sound. It is good also as a structure provided with a part.

In the first and second embodiments, the present invention is applied to a device mounted on a vehicle (electric vehicle) traveling on a road using an electric motor as a drive mechanism. Of course, the present invention can be applied to a device mounted on the body.

In the first and second embodiments described above, the control units 150A and 150B perform the sound output control process for reducing the degree of leakage sound recognition by executing the program. The unit may be performed by hardware using a dedicated LSI (Large Scale Integrated Circuit) or the like.

The programs executed by the control units 150A and 150B may be acquired in a form recorded on a portable recording medium such as a CD-ROM or DVD, or distributed via a network such as the Internet. You may make it acquire by.

Claims

A moving body external sound detection unit for detecting a sound outside the moving body;
A moving body sound detector for detecting sounds inside the moving body;
A person detecting unit for detecting a person around the moving body;
Based on the external sound detected by the mobile external sound detection unit and the internal sound detected by the mobile internal sound detection unit, the internal sound of the mobile body detected by the person detected by the human detection unit A sound output control unit that outputs a sound that reduces the degree of recognition of leaked sound to the outside from the sound output unit;
A sound control apparatus comprising:
The sound output control unit
Based on the external sound detected by the mobile external sound detection unit and the internal sound detected by the mobile internal sound detection unit, an environmental sound outside the mobile body that does not include the leakage sound is extracted. And
The sound control apparatus according to claim 1, wherein the extracted environmental sound is output from the sound output unit toward a person detected by the person detection unit.
The sound output control unit
Based on the external sound detected by the mobile external sound detection unit and the internal sound detected by the mobile internal sound detection unit, the leakage sound is extracted,
The sound control apparatus according to claim 1, wherein a reverse phase sound of the extracted leaking sound is output from the sound output unit toward a person detected by the human detection unit.
An acquisition unit for acquiring travel information of the mobile body;
The sound output control unit
Based on the travel information acquired by the acquisition unit, determine whether the moving body is stopped,
When it is determined that the moving body is stopped, the sound output unit outputs a sound that reduces the degree of recognition of the leaked sound,
The sound control apparatus according to any one of claims 1 to 3, wherein
The sound output control unit causes the sound output unit to output a sound for reducing the degree of recognition of the leaked sound when the level of the sound detected by the mobile body sound detection unit is equal to or higher than a predetermined value. The sound control device according to any one of claims 1 to 4, wherein:
The sound output control unit is detected by the human detection unit based on the external sound detected by the mobile external sound detection unit and the internal sound detected by the mobile internal sound detection unit. 5. The sound output unit according to any one of claims 1 to 4, wherein a sound that reduces a degree of recognition of the leaked sound is output from the sound output unit when it is determined that the leaked sound can be recognized by a person. The sound control device described.
A moving object external sound detection step for detecting a sound outside the moving object;
A moving body sound detecting step for detecting sound inside the moving body;
A human detection step of detecting a person around the moving body;
Based on the external sound detected in the moving body external sound detection step and the internal sound detected in the moving internal sound detection step, the sound inside the moving body detected by the person detected in the human detection step A sound output control step for outputting a sound for reducing the recognition of an external leaking sound from the sound output unit;
A sound control method comprising:
A sound control program that causes a calculation unit to execute the sound control method according to claim 7.
9. A recording medium in which the sound control program according to claim 8 is recorded so as to be readable by an arithmetic unit.