JPWO2012066685A1 - Acoustic device and output sound control method - Google Patents

Abstract

When the operation start condition of acoustic device 700A is satisfied, control unit 730A determines that the predetermined period has started. In this way, when it is determined that the predetermined period has started, the control unit 730A refers to the first sound source information to generate the first sound signal corresponding to the operation confirmation sound and acquires it until the predetermined period ends. Based on the drive information sent from the unit 720, the supply unit 740 is controlled to generate a second sound signal corresponding to the vehicle-like sound. Then, when a predetermined time elapses from the start of the predetermined period and the predetermined period elapses, the control unit 730A outputs an output sound signal corresponding to the vehicle recall sound based on the drive information sent from the acquisition unit 720. The supply unit 740 performs control for generating the. For this reason, it is possible to easily and reliably confirm the normality of the resources for outputting the vehicle startup sound outside the vehicle.

Description

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

  In recent years, electric vehicles using batteries as a driving force source have been widely used. When such a vehicle travels, the level of driving sound outside the vehicle is dramatically lower than that of a conventional gasoline vehicle. As a result, a situation may occur in which a pedestrian or bicycle driver does not notice the presence of a vehicle approaching from outside the field of view, such as behind. The occurrence of such a situation is a serious problem for traffic safety.

  For this reason, a technique for outputting a warning sound corresponding to the traveling state of the vehicle to the outside of the vehicle has been proposed (see Patent Document 1: hereinafter referred to as “Conventional Example 1”). In the technology of the conventional example 1, the first horn means for generating the first horn that has a volume satisfying the legal standard, and the aspect that is lower than the volume of the first horn and different from the horn 1 (for example, And second horn means for generating a second horn that satisfies at least one of the following characteristics: When the driving sound of the driving force source is low, the vehicle speed is slow, the vehicle is controlled to generate the second horn when the vehicle is started, etc. The people around are alerted without giving them any discomfort.

  Moreover, although it is not a technique related to vehicle recall sound output, a technique has also been proposed in which a sound is emitted only for a predetermined time when an electric vehicle is started to inform the driver of power-on of the electric vehicle (Patent Document 2: hereinafter, “ This will be referred to as Conventional Example 2). In the technique of Conventional Example 2, when a momentary switch that is provided in the cab portion of the electric vehicle and is operated when the electric vehicle is started is operated, a sound is output to the cab only for a predetermined time. .

JP 2006-199105 A Japanese Patent Laid-Open No. 11-46401

  Incidentally, the vehicle-like sound output device as in the conventional example 1 may also fail. If a failure occurs in the vehicle recalling sound output device and the vehicle recalling sound is not output outside the vehicle, it is not preferable in terms of traffic safety. For this reason, it is preferable to be able to confirm the normality of a device that generates a vehicle-like sound such as a warning sound or a traveling sound. However, the conventional example 1 does not describe anything about the technique for confirming the normality.

  Therefore, the technology of Conventional Example 1 and the technology of Conventional Example 2 are combined, and when a user operates a predetermined switch in the vehicle that is operated when the vehicle is started, a predetermined type of sound is output in the passenger compartment. It is conceivable to implement the function in a device that generates a vehicle-like sound. However, in this case, two independent sound output systems, that is, a sound output system for vehicle-recollected sound to the outside of the vehicle and a sound output system for normality confirmation sound to the vehicle interior are provided. As a result, for example, when only the speaker of the sound output system of the vehicle evoked sound fails, the presence or absence of the failure cannot be determined by whether or not the normality confirmation sound has been heard.

  For this reason, there is a need for a technology that can accurately check the normality of a device for outputting a vehicle-like sound outside the vehicle and that can improve usability for the user. 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 a new acoustic device capable of easily and reliably confirming the normality of resources for outputting vehicle-like sounds outside the vehicle, and An object is to provide an output sound control method.

  From the first viewpoint, the present invention is an acoustic device that supplies a sound signal to a sound output unit that outputs a sound toward the outside of the vehicle, the first sound source information stored in the storage unit, and the sound source A supply unit that generates sound signals with reference to at least one sound source information of second sound source information different from the first sound source information and outputs the sound signal to the sound output unit; a control unit that controls the supply unit; The control unit causes the supply unit to generate the first sound signal with reference to the first sound source information until a predetermined period starting after the acoustic device becomes operable is completed, and at least After the predetermined period is over, the acoustic device is characterized in that the supply unit generates a second sound signal with reference to the second sound source information.

  From a second viewpoint, the present invention generates a sound signal by referring to at least one sound source information of the first sound source information and second sound source information different from the first sound source information stored in the storage unit. An output sound control method used in an acoustic device that includes a supply unit that outputs to a sound output unit and outputs sound from the sound output unit toward the outside of the vehicle, wherein the acoustic device is operable A first control step of causing the supply unit to generate a first sound signal with reference to the first sound source information until a predetermined period starting after the end of the supply; and at least after the predetermined period ends, the supply A second control step of causing the unit to generate a second sound signal with reference to the second sound source information.

  According to a third aspect of the present invention, there is provided an output sound control program characterized by causing an arithmetic unit to execute the output sound control method of the present invention.

  From a fourth viewpoint, the present invention is a recording medium in which the output 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 audio equipment which concerns on 1st Embodiment of this invention. It is a block diagram for demonstrating the structure of the audio equipment which concerns on 2nd Embodiment of this invention. It is a block diagram for demonstrating schematically the structure of the audio equipment concerning one Example of this invention. It is a figure for demonstrating the structure of the information storage area of the memory | storage part of FIG. It is a block diagram which shows the structure of the supply part of FIG. It is a flowchart for demonstrating the output sound control process in the apparatus of FIG.

  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, an acoustic device 700A according to a first embodiment of the present invention will be described with reference to FIG.

<Configuration>
FIG. 1 shows a schematic configuration of an acoustic device 700A according to the first embodiment. As shown in FIG. 1, the acoustic device 700A is mounted on an electric vehicle MV (hereinafter referred to as “vehicle MV”), and a sound output unit 790 is connected thereto.

  Here, the sound output unit 790 includes a speaker. The sound output unit 790 receives the output sound signal sent from the acoustic device 700A. And the sound output part 790 outputs the sound according to an output sound signal toward the exterior of the vehicle MV.

  The acoustic device 700A includes a storage unit 710 and an acquisition unit 720. The acoustic device 700A includes a control unit 730A and a supply unit 740.

  The storage unit 710 has a nonvolatile storage area. The storage unit 710 can be accessed by the supply unit 740. The non-volatile storage area of the storage unit 710 stores first sound source information and second sound source information different from the first sound source information. In the first embodiment, the first sound source information is sound source information related to the operation confirmation sound, and the second sound source information is sound source information related to the vehicle recall sound. The sound source information includes waveform data composed of a plurality of sound data. That is, the plurality of sound data is time-series data.

  Here, the “vehicle recall sound” is a sound that can notify a pedestrian or the like of the presence of the vehicle MV. For example, “vehicle recall sound” includes pseudo engine sound, sine waveform sound, and the like.

  Said acquisition part 720 acquires the drive information containing the operation state of the drive motor of vehicle MV, and the speed of vehicle MV. The acquisition result by the acquisition unit 720 is sent to the control unit 730A.

  In the first embodiment, the acquisition unit 720 acquires a detection result by a motor rotation speed sensor (not shown) installed in the vehicle MV, and a detection result by a vehicle speed sensor (not shown) installed in the vehicle MV. To get.

  Said control part 730A starts initialization operation | movement by supplying operating power to the whole acoustic apparatus 700A. Then, the control unit 730A receives the drive information sent from the acquisition unit 720 after the initialization operation is completed.

  Subsequently, the control unit 730A controls the supply unit 740 so as to generate a first sound signal corresponding to the operation confirmation sound with reference to the first sound source information in a predetermined period that starts after the end of the initialization operation. To do. Moreover, the control part 730 controls the supply part 740 so that the 2nd sound signal corresponding to a vehicle recall sound may be produced | generated with reference to 2nd sound source information based on drive information. In the first embodiment, the “predetermined period” is a period of a predetermined time length. Details of the control processing by the control unit 730A will be described later.

  The supply unit 740 generates an output sound signal with reference to at least one of the first sound source information and the second sound source information stored in the storage unit 710 according to control by the control unit 730A. Then, the supply unit 740 outputs the generated output sound signal toward the sound output unit 790. The generation process of the output sound signal by the supply unit 740 will be described later.

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

  For example, when the key operation of the vehicle MV is performed, the accessory power supply is turned on, and the supply of operating power to the entire sound device 700A and the sound output unit 790 is started, the acquisition unit 720 acquires drive information. Start. Then, the acquisition unit 720 sends the acquired drive information to the control unit 730A.

  Further, when supply of operating power to the entire acoustic device 700A is started, the control unit 730A starts an initialization operation. When the initialization operation is finished and the function of the audio device 700A can be exhibited, the control unit 730A determines that the operation start condition of the audio device 700A is satisfied and a predetermined time is started. Thereafter, sound generation processing is performed.

<< Sound generation processing in a predetermined period >>
In the sound generation process, the control unit 730A sequentially generates a first signal generation control command for generating a first sound signal corresponding to the operation confirmation sound in a predetermined period. Control unit 730 </ b> A sequentially generates second signal control commands for generating a second sound signal corresponding to the vehicle recall sound based on the drive information sent from acquisition unit 720.

  Then, the control unit 730A sequentially sends the generated first and second signal control commands to the supply unit 740. Here, the first signal generation control command includes the first sound signal generation designation. In addition, the second signal generation control command includes generation specification of the second sound signal, an array period specification value that is a sound quality parameter, and a sound volume specification value.

  The generation specification of the second sound signal is specified to generate a silence signal as the second sound signal when the drive motor of the vehicle MV is not operating.

  When the supply unit 740 receives the first signal control command, the supply unit 740 sequentially reads the sound data included in the first sound source information in the storage unit 710. Then, the supply unit 740 performs volume adjustment so that the reproduced sound becomes a predetermined volume while sequentially outputting the read sound data internally in a predetermined cycle. As a result, a first sound signal is generated.

  In addition, when the supply unit 740 receives the second signal control command, the supply unit 740 sequentially reads the sound data included in the second sound source information in the storage unit 710. Then, the supply unit 740 sequentially and internally outputs the read sound data in the cycle of the array cycle designation value. As a result, a sound quality adjustment signal having a sound quality waveform corresponding to the array period designation value is generated. Subsequently, the supply unit 740 performs a volume adjustment according to the volume specification value on the sound quality adjustment signal. As a result, a second sound signal is generated.

  Thereafter, the supply unit 740 synthesizes the first sound signal and the second sound signal. As a result, an output sound signal is generated. The output sound signal generated in this way is sent to the sound output unit 790.

  The sound output unit 790 that has received the output sound signal outputs the sound according to the output sound signal toward the outside of the vehicle MV. As a result, during the predetermined period, when the drive motor is not operating, an operation confirmation sound is output outside the vehicle. Further, when the drive motor is operating but the vehicle MV is not traveling, a synthesized sound of the operation confirmation sound and the so-called “idle sound” is output outside the vehicle. Furthermore, when the vehicle MV is traveling, a synthesized sound of the operation confirmation sound and the vehicle recall sound during traveling is output to the outside of the vehicle.

  When a predetermined time elapses during the continuation of the sound generation process performed as described above and the predetermined period ends, the generation of the first sound signal is ended and the sound generation process in the normal period is started.

《Sound generation processing during normal period》
In the normal period, the control unit 730A sequentially generates second signal control commands for generating a second sound signal corresponding to the vehicle recall sound based on the drive information sent from the acquisition unit 720. Then, the control unit 730A sequentially sends the generated second signal control command to the supply unit 740.

  Receiving the second signal control command, the supply unit 740 sequentially reads the sound data included in the second sound source information in the storage unit. Then, the supply unit 740 sequentially and internally outputs the read sound data in the cycle of the array cycle designation value. As a result, a sound quality adjustment signal having a sound quality waveform corresponding to the array period designation value is generated. Subsequently, the supply unit 740 performs a volume adjustment according to the volume specification value on the sound quality adjustment signal. As a result, an output sound signal is generated. The output sound signal generated in this way is sent to the sound output unit 790.

  The sound output unit 790 that has received the output sound signal outputs the sound according to the output sound signal toward the outside of the vehicle MV. As a result, during the normal period, when the drive motor is not operating, no sound is output outside the vehicle. Further, when the drive motor is operating but the vehicle MV is not traveling, a so-called “idle sound” is output outside the vehicle. Further, when the vehicle MV is traveling, a vehicle-like sound during traveling is output to the outside of the vehicle.

  As described above, in the first embodiment, when the supply of operating power to the entire acoustic device 700A is started, the control unit 730A satisfies the operation start condition of the acoustic device 700A and starts a predetermined period. Judge that it was done. When it is determined that the predetermined period has been started, the control unit 730A supplies control for generating the first sound signal corresponding to the operation confirmation sound with reference to the first sound source information until the predetermined period ends. The control unit 740 controls the supply unit 740 to generate a second sound signal corresponding to the vehicle-evoked sound with reference to the second sound source information based on the drive information. As a result, during the predetermined period, a synthesized sound of the operation confirmation sound and the vehicle recall sound is output outside the vehicle.

  Then, when a predetermined time has elapsed since the start of the predetermined period and the predetermined period has elapsed, the control unit 730A outputs an output sound signal corresponding to the vehicle recall sound based on the drive information sent from the acquisition unit 720. The supply unit 740 performs control for generating the. As a result, vehicle recall sounds corresponding to the operating state of the drive mechanism of the vehicle MV and the traveling state of the vehicle MV are output to the outside of the vehicle.

  Therefore, according to 1st Embodiment of this invention, the normality of the resource for outputting a vehicle-like sound outside a vehicle can be confirmed easily and reliably.

  In the first embodiment, the operation confirmation sound is different from the vehicle recall sound that is output outside the vehicle while the vehicle MV is stopped after a predetermined period. For this reason, even if a user exists in a vehicle interior, generation | occurrence | production of an operation confirmation sound can be confirmed easily.

[Second Embodiment]
Next, an acoustic 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 an acoustic device 700B according to the second embodiment. As illustrated in FIG. 2, the acoustic device 700 </ b> B includes a server device 810 and a terminal device 910. Here, data communication using the communication network 500 is possible between the server device 810 and the terminal device 910.

  The server device 810 is installed at a fixed position in a building, for example. The server device 810 includes a storage unit 710, a control unit 730B, and a supply unit 740.

  The terminal device 910 is mounted on the vehicle MV. The terminal device 910 includes an acquisition unit 720 and a condition determination unit 760. In addition, a sound output unit 790 is mounted on the vehicle MV.

  That is, the acoustic device 700B is provided with a control unit 730B instead of the control unit 730A as compared with the acoustic device 700A of the first embodiment described above, and a condition for being connected to the control unit 730B via the communication network 500. The difference is that a determination unit 760 is further provided. The audio device 700B performs data communication using the communication network 500 when the acquisition unit 720 sends the acquisition result to the control unit 730B and when the supply unit 740 sends the output sound signal to the sound output unit 790. What is different from the acoustic device 700A. Hereinafter, description will be made mainly focusing on these differences.

  Compared to the control unit 730A described above, the control unit 730B can perform the function of the audio device 700B, and determines that the operation start condition of the audio device 700B is satisfied and the predetermined period has started. The point which is performed when the condition satisfaction report sent from the condition determination unit 760 is received is different. After determining that the predetermined period has started, the control unit 730B operates in the same manner as the control unit 730A.

  The condition determination unit 760 detects that supply of operating power to the entire terminal device 910 and the sound output unit 790 has started. Subsequently, when it is detected that the supply of the operating power is started, the condition determination unit 760 executes a communication link establishment process with the control unit 730B. Then, when the communication link with the control unit 730B is established, the condition determination unit 760 transmits to the control unit 730B as a condition satisfaction report that the operation start condition of the acoustic device 700B is satisfied.

  In the second embodiment, the acquisition unit 720 and the sound output unit 790 also perform communication link establishment processing between the control unit 730B and the supply unit 740 when the supply of operating power is started. Yes.

<Operation>
The operation of the acoustic device 700B configured as described above will be described. Note that the server device 810 is always operating.

  For example, when a key operation of the vehicle MV is performed, the accessory power supply is turned on, and supply of operating power to the entire terminal device 910 and the sound output unit 790 is started, the condition determination unit 760 and the acquisition unit 720 are The communication link establishment process with the control unit 730B is started. In addition, the sound output unit 790 starts a communication link establishment process with the supply unit 740.

  When the communication link with the control unit 730B is established, the condition determination unit 760 notifies the control unit 730B via the communication network 500 that the condition for starting the operation of the acoustic device 700B is satisfied as a condition satisfaction report. send. In addition, when a communication link with the control unit 730B is established, the acquisition unit 720 starts acquisition of drive information and sends the acquired drive information to the control unit 730B via the communication network 500. When the communication link with the supply unit 740 is established, the sound output unit 790 enters a waiting state for an output sound signal sent from the supply unit 740 via the communication network 500.

  When receiving the condition satisfaction report sent from the condition determination unit 760 as described above, in the server device 810, the acquisition unit 720 sends the acquired drive information to the control unit 730B via the communication network 500, And the sound generation process is executed in the same manner as in the first embodiment described above except that the supply unit 740 sends the output sound signal to the sound output unit 790 via the communication network 500. For example, when the accessory power supply is turned off and the established communication link is disconnected, the sound generation process ends.

  As described above, in the second embodiment, when the supply of operating power to the entire terminal device 910 is started, the control unit 730B satisfies the operation start condition of the acoustic device 700B and starts a predetermined period. Judge that it was done. When it is determined that the predetermined period has been started, the control unit 730B supplies control for generating the first sound signal corresponding to the operation confirmation sound with reference to the first sound source information until the predetermined period ends. The control unit 740 controls the supply unit 740 to generate a second sound signal corresponding to the vehicle-evoked sound with reference to the second sound source information based on the drive information. As a result, during the predetermined period, a synthesized sound of the operation confirmation sound and the vehicle recall sound is output outside the vehicle.

  Then, when a predetermined time elapses from the start of the predetermined period and the predetermined period elapses, the control unit 730 </ b> B outputs an output sound signal corresponding to the vehicle recall sound based on the drive information sent from the acquisition unit 720. The supply unit 740 performs control for generating the. As a result, vehicle recall sounds corresponding to the operating state of the drive mechanism of the vehicle MV and the traveling state of the vehicle MV are output to the outside of the vehicle.

  Therefore, according to the second embodiment of the present invention, as in the case of the first embodiment described above, the normality of the resources for outputting the vehicle recall sound outside the vehicle can be easily and reliably confirmed. can do.

  Further, in the second embodiment, as in the case of the first embodiment described above, the operation confirmation sound is different from the vehicle recall sound that is output outside the vehicle while the vehicle MV is stopped after the lapse of the predetermined period. I have to. For this reason, even if a user exists in a vehicle interior, generation | occurrence | production of an operation confirmation sound can be confirmed easily.

[Modification of Embodiment]
In the first and second embodiments described above, the synthesized sound of the operation confirmation sound and the vehicle recall sound is output outside the vehicle during a predetermined period that starts after the operation start conditions of the acoustic devices 700A and 700B are satisfied. I did it. On the other hand, during the predetermined period, only the signal corresponding to the operation confirmation sound is generated as the output sound signal by the supply unit, and the vehicle-recollected sound according to the output sound signal is output to the outside of the vehicle. It may be.

  In the first and second embodiments described above, the volume is adjusted so that the reproduction sound of the first sound signal, that is, the operation confirmation sound has a predetermined volume. However, the user specifies a setting value for the volume adjustment. You may be able to do that.

  In the first and second embodiments, the acoustic device is not provided with a sound output unit. However, when there is no existing sound output unit that can be used, the acoustic device includes a sound output unit. It is good.

  In the first and second embodiments described above, one first sound source information is stored in the storage unit, but a plurality of first sound source information candidates may be stored. In this case, the acoustic device may be configured to further include a designation unit that designates one of the plurality of first sound source information candidates stored in the storage unit as the first sound source information. When the user designates sound source information for reproducing the sound preferred by the user, the identification of the operation confirmation sound can be improved, and the user is uncomfortable when listening to the operation confirmation sound. Can not be given. That is, when the user specifies sound source information for reproducing a favorite sound, the user's favorite sound is output as an operation confirmation sound every time the sound device is operating normally. . In this case, when the sound device breaks down, since a favorite sound that would normally be output each time is not output, the user immediately notices the failure.

  In the first and second embodiments described above, the acoustic device is provided with a storage unit. However, when there is an existing storage unit that stores the first sound source information and the second sound source information, the existing device is present. The storage unit may be used, and the acoustic device may not include the storage unit.

  In the second embodiment, the server device 810 includes the storage unit 710, the control unit 730B, and the supply unit 740, but any of these components is arbitrarily mounted on the vehicle side. You can

  Hereinafter, an embodiment of an 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.

[Constitution]
FIG. 3 shows a schematic configuration of an acoustic device 100 according to an embodiment. The acoustic device 100 is an aspect of the acoustic device 700A (see FIG. 1) of the first embodiment described above.

  The acoustic device 100 is mounted on a vehicle CR that travels on a road using an electric motor as a drive mechanism. The vehicle CR is connected to a sound output unit 210 as a sound output unit 790 connected to the acoustic device 100, a vehicle speed sensor 220, and a rotation speed information sensor 230.

  Here, the sound output unit 210 includes a left speaker that outputs sound toward the left front and a right speaker that outputs sound toward the right front. The sound output unit 210 receives an output sound signal AOS sent from the acoustic device 100. Then, the sound output unit 210 outputs sound from the left and right speakers to the outside of the vehicle CR according to the output sound signal AOS.

  The vehicle speed sensor 220 detects the rotation of the wheel or axle of the vehicle CR. The rotation speed information sensor 230 detects the rotation speed of the electric motor. The detection results by these sensors 220 and 230 are sent to the acoustic device 100.

  Next, the configuration of the acoustic device 100 will be described. As illustrated in FIG. 3, the acoustic device 100 includes a storage unit 110 as a storage unit 710 and a drive information acquisition unit 120 as an acquisition unit 720. In addition, the acoustic device 100 includes a supply unit 130 as a supply unit 740. Furthermore, the acoustic device 100 includes an operation input unit 150 as a designation unit and a control unit 160 as a control unit 730A.

  The storage unit 110 includes a memory element, and stores various information data such as sound source information used in the acoustic device 100. The storage unit 110 can be accessed by the supply unit 130 and the control unit 160. The configuration of the information storage area of the storage unit 110 will be described later.

  The drive information acquisition unit 120 receives the vehicle speed detection result SPS sent from the vehicle speed sensor 220 and the rotation speed detection result ERS sent from the rotation speed information sensor 230. The drive information acquisition unit 120 converts the detection result SPS into vehicle speed information SP in a form that can be handled by the control unit 160, and converts the detection result ERS into rotation speed information ER in a form that can be handled by the control unit 160. Convert. The vehicle speed information SP and the rotational speed information ER obtained in this way are sent to the control unit 160.

  The supply unit 130 generates an output sound signal AOS with reference to at least one of the first sound source information and the second sound source information SSI2 under the control of the control unit 160. Then, the supply unit 130 sends the generated output sound signal AOS to the sound output unit 210. The detailed configuration of the supply unit 130 will be described later.

  The operation input unit 150 includes a key unit provided in the main body of the audio device 100 and / or a remote input device including the key unit. Here, as a key part provided in the main body part, a touch panel provided in a display device can be used. In addition, it can replace with the structure which has a key part, or can also employ | adopt the structure input with a sound using a voice recognition technique in combination.

  When the user operates the operation input unit 150, one of a plurality of later-described sound source information candidates stored in the storage unit 110 can be designated as the first sound source information SSI1. ing. The input content performed using the operation input unit 150 is sent from the operation input unit 150 to the control unit 160 as operation input data IPD.

  The control unit 160 includes a central processing unit (CPU). The control unit 160 performs an output sound control process in the acoustic device 100 by executing a predetermined program. The output sound control process by the control unit 160 will be described later.

  Next, the configuration of the information storage area of the storage unit 110 described above will be described. As shown in FIG. 4, the information storage area includes a first sound source information candidate group SSC, first sound source information SSI1, and second sound source information SSI2.

The first sound source information candidates SSC above, the sound source information SS _1, SS ₂ are candidates for the first sound source information SSI1, ..., and a SS _M. Here, the sound source information _{SS 1, SS 2, ...,} SS M is a sound source information related to the operation confirmation sound, the user, so it is possible to specify a single sound source information from one of these sound source information ing.

The first sound source information SSI1 above, the sound source information SS _1, SS ₂ as described above, ..., among the SS _M, a sound source information control unit 160 stored in the storage area in accordance with designation by the user. Moreover, said 2nd sound source information SSI2 is sound source information regarding a vehicle recall sound. Here, each of the first sound source information SSI1 and the second sound source information SSI2 is composed of a plurality of sound data.

  Next, the configuration of the supply unit 130 described above will be described. As shown in FIG. 5, the supply unit 130 includes a first sound signal generation unit 131, a second sound signal generation unit 132, a level adjustment unit 133, and a signal synthesis unit 134.

  The first sound signal generation unit 131 generates the first sound signal SUD1 in accordance with the first generation specification PDC1 included in the generation specification PDC sent from the control unit 160. Here, the first generation designation PDC1 designates generation / non-generation of the first sound signal. Under the control of the control unit 160, the first sound signal generation unit 131 sequentially reads a plurality of sound data included in the first sound source information SSI1 designated by the user as sound data SDD1, and then performs predetermined processing. In a cycle, the read data is sequentially output internally. The first sound signal generation unit 131 adjusts the volume of the internally output signal so that the reproduced sound has a predetermined volume, and generates the first sound signal SUD1. The generated first sound signal SUD1 is sent to the signal synthesis unit 134.

  The second sound signal generation unit 132 generates the second sound signal SUD2 according to the second generation specification PDC2 included in the generation specification PDC sent from the control unit 160. Here, the second generation specification PDC2 is a generation specification of a second sound signal in which an array period specification value that is a sound quality parameter is specified. Under the control of the control unit 160, the second sound signal generation unit 132 sequentially reads a plurality of sound data included in the second sound source information SSI2 as sound data SDD2, and then is transmitted from the control unit 160. The read data is sequentially output at the cycle of the specified array cycle. As a result, the second sound signal SUD2 having a sound quality waveform corresponding to the array period designation value is generated. The generated first sound signal SUD2 is sent to the signal synthesis unit 134.

  The level adjusting unit 133 receives the second sound signal SUD2 sent from the second sound signal generating unit 132. Then, the level adjustment unit 133 performs volume adjustment processing on the second sound signal SUD2 in accordance with the sound volume designation value VLC sent from the control unit 160, and generates an adjusted second sound signal SLD2. The adjusted second sound signal SLD2 generated in this way is sent to the signal synthesis unit 134.

  The signal synthesizer 134 receives the first sound signal SUD1 sent from the first sound signal generator 131 and the adjusted second sound signal SLD2 sent from the level adjuster 133. Then, the signal synthesis unit 134 performs signal synthesis processing according to the period report sent from the control unit 160.

  When the content of the period report PRD sent from the control unit 160 is a predetermined period, the signal synthesis unit 134 performs signal synthesis of the first sound signal SUD1 and the adjusted second sound signal SLD2 as an output sound signal AOS. The sound is sent to the sound output unit 210. On the other hand, when the content of the period report PRD sent from the control unit 160 is a normal period, the signal synthesis unit 134 does not perform signal synthesis and uses the adjusted second sound signal SLD2 as the output sound signal AOS as a sound output unit. Send to 210.

[Operation]
The operation of the acoustic device 100 configured as described above will be described mainly focusing on output sound control processing by the control unit 160.

  In the present embodiment, as shown in FIG. 6, when the key operation of the vehicle CR is performed, the accessory power supply is turned on, and the supply of operating power to the entire sound device 100 and the sound output unit 210 is started. First, in step S11, the control unit 160 performs an initialization process. In this initialization process, the control unit 160 causes the drive information acquisition unit 120 to start the drive information acquisition process. As a result, the drive information acquisition unit 120 starts collecting the vehicle speed detection result SPS sent from the vehicle speed sensor 220 and the rotation speed detection result ERS sent from the rotation speed information sensor 230. Then, the vehicle speed information SP and the rotation speed information ER are sent from the drive information acquisition unit 120 to the control unit 160 (see FIG. 3).

  When the initialization process in step S11 is completed, in step S12, the control unit 160 determines that the predetermined period has started. When it is determined that the predetermined period has started, the control unit 160 transmits to the supply unit 130 the first generation designation PDC1 indicating that the first sound signal SUD1 should be generated, and the period report PRD having the predetermined period. Thereafter, the process proceeds to step S13.

  Note that the first sound generation unit 131 for which the generation of the first sound signal SUD1 is specified by the first generation specification PDC1 starts the operation confirmation sound generation process. In the operation confirmation sound generation process, the first sound generation unit 131 sequentially reads the sound data included in the first sound source information SSI1 designated by the user. Then, the first sound generation unit 131 adjusts the volume so that the reproduced sound has a predetermined volume while sequentially outputting the read sound data internally in a predetermined cycle, and generates the first sound signal SUD1. Generate. The first sound signal SUD1 generated in this way is sent to the signal synthesis unit 134. This operation confirmation sound generation process continues until it is determined in step S15 described later that the predetermined period has ended.

  In step S13 described above, the control unit 160 reads the vehicle speed information SP and the rotation speed information ER sent from the drive information acquisition unit 120. Subsequently, in step S14, the control unit 160 generates a second generation designation PDC2 and a sound volume designation value VLC to generate the second sound signal SUD2 based on the drive information. Then, the control unit 160 specifies the generated second generation designation PDC2 to the second sound generation unit 132 and designates the volume designation value VLC to the level adjustment unit 133 (see FIG. 5).

  In this embodiment, when it is determined from the rotation speed information ER that the electric motor is not rotating and from the vehicle speed information SP, it is determined that the vehicle CR has not moved, the control unit 160 “Silence” is designated as the designated value VLC. When it is determined from the rotation speed information ER that the electric motor is rotating and from the vehicle speed information SP, it is determined that the vehicle CR is not moving, the control unit 160 makes a so-called “idle sound”. Correspondingly, a predetermined volume designation value VLC is generated.

  Further, when it is determined from the vehicle speed information SP that the vehicle CR is traveling, the control unit 160 generates an array cycle designation value and a volume designation value VLC that are determined in advance corresponding to the vehicle speed. Here, the higher the vehicle speed is, the shorter the arrangement cycle designation value is and the larger the volume designation value is.

  The second sound generation unit 132 in which the second generation specification PDC2 is specified sequentially reads the sound data included in the second sound source information SSI2, and sequentially outputs the read sound data in the period of the array period specification value. As a result, the second sound signal SUD2 having a sound quality waveform corresponding to the array period designation value is generated. The second sound signal SUD2 generated in this way is sent to the level adjustment unit 133.

  Further, the level adjustment unit 133 to which the volume designation value VLC is designated performs volume adjustment on the second sound signal SUD2 sent from the second sound signal generation unit 132 in accordance with the volume designation value VLC, and adjusts the second adjusted sound. A signal SLD2 is generated. The adjusted second sound signal SLD2 generated in this way is sent to the signal synthesis unit 134.

  Then, the signal synthesis unit 134 performs signal synthesis of the first sound signal SUD1 and the adjusted second sound signal SLD2, and sends the resultant signal to the sound output unit 210 as the output sound signal AOS. As a result, a synthesized sound of the operation confirmation sound and the vehicle recall sound is output outside the vehicle.

  When the designation of the generation designation PDC and the volume designation value VLC in step S14 is finished, in step S15, the control unit 160 determines whether or not the predetermined period has expired. If the result of this determination is negative (step S15: N), the process returns to step S13. Thereafter, the processes in steps S13, S14, and S15 are repeated until the determination result in step S15 becomes affirmative, and a sound including an operation confirmation sound is output from the sound output unit 210.

  When the predetermined period ends and the result of the determination in step S15 is affirmative (step S15: Y), the control unit 160 includes the first generation designation PDC1 that designates non-generation of the first sound signal SUD1, and the normal period. The period report PRD having the content is sent to the supply unit 130. Then, the process proceeds to step S16. In step S16, the control unit 160 reads the vehicle speed information SP and the rotational speed information ER sent from the drive information acquisition unit 120 as in step S13.

  Next, in step S17, the control unit 160 generates a second generation designation PDC2 and a volume designation value VLC indicating that the second sound signal SUD2 should be generated based on the drive information. Then, the control unit 160 specifies the generated second generation specification PDC2 to the second sound generation unit 132 and specifies the volume specification value VLC to the level adjustment unit 133.

  The second sound generation unit 132 in which the second generation specification PDC2 is specified generates the second sound signal SUD2 and sends it to the level adjustment unit 133. Further, the level adjustment unit 133 to which the volume designation value VLC is designated performs volume adjustment on the second sound signal SUD2 sent from the second sound signal generation unit 132 in accordance with the volume designation value VLC, and adjusts the second adjusted sound. A signal SLD2 is generated. The adjusted second sound signal SLD2 generated in this way is sent to the signal synthesis unit 134.

  Then, the signal synthesis unit 134 sends the adjusted second sound signal SLD2 to the sound output unit 210 as the output sound signal AOS. As a result, vehicle recall sound is output outside the vehicle.

  When the designation of the second generation designation PDC2 and the volume designation value VLC for vehicle recall sound in step S17 is completed, the process returns to step S16. Thereafter, the processes of steps S16 and S17 are repeated, and the vehicle-like sound corresponding to the rotation speed and the vehicle speed of the electric motor is output from the sound output unit 210.

  As described above, in this embodiment, when the supply of operating power to the entire acoustic device 100 is started, the control unit 160 satisfies that the operation start condition of the acoustic device 100 is satisfied and a predetermined period has started. to decide. When it is determined that the predetermined period has started, the control unit 160 supplies control for generating the first sound signal corresponding to the operation confirmation sound with reference to the first sound source information until the predetermined period ends. Control is performed on the supply unit 130 with reference to the second sound source information based on the drive information, and the second sound signal corresponding to the vehicle recall sound is generated based on the drive information. As a result, during the predetermined period, a synthesized sound of the operation confirmation sound and the vehicle recall sound is output from the sound output unit 210 to the outside of the vehicle.

  Then, when a predetermined time elapses from the start of the predetermined period and the predetermined period elapses, the control unit 160 outputs based on the drive information sent from the drive information acquisition unit 120 and outputs corresponding to the vehicle recall sound. Control for generating the sound signal AOS is performed on the supply unit 130. As a result, in the normal period after the predetermined period has elapsed, the vehicle recall sound corresponding to the operating state of the drive mechanism of the vehicle CR and the traveling state of the vehicle CR is output from the sound output unit 210 to the outside of the vehicle.

  Therefore, according to the present embodiment, it is possible to easily and reliably confirm the normality of the resources for outputting the vehicle recall sound outside the vehicle.

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

  For example, in the above embodiment, all the components of the acoustic device 100 are mounted on the vehicle CR. However, as in the second embodiment described above, a server that can communicate with the terminal device on which the vehicle CR is mounted. The device may include some of the components of the acoustic device 100.

  Further, in the above-described embodiment, the synthesized sound of the operation confirmation sound and the vehicle recall sound is output outside the vehicle in a predetermined period that starts after the operation start condition of the acoustic device 100 is satisfied. On the other hand, during the predetermined period, only the signal corresponding to the operation confirmation sound is generated as the output sound signal, and the vehicle recall sound according to the output sound signal is output outside the vehicle. Good.

  Further, in the above-described embodiment, the volume adjustment is performed so that the reproduction sound of the first sound signal, that is, the operation confirmation sound has a predetermined volume, but by the volume designation input of the operation confirmation sound to the operation input unit 150, The user may be able to specify the setting value for the volume adjustment.

  In the above embodiment, the acoustic device 100 is not provided with the sound output unit 210. However, when there is no existing sound output unit 210 that can be used, the acoustic device 100 includes the sound output unit. Also good.

  In the above embodiment, the storage unit stores a plurality of sound source information as candidates for the first sound source information. However, only one sound source information may be stored as the first sound source information. .

  In the above-described embodiment, the storage unit 110 included in the acoustic device 100 stores the first sound source information candidate group SSC, the first sound source information SSI1, and the second sound source information SSI2, but stores these pieces of information. In the case where the existing storage unit exists, the existing storage unit may be used, and the storage unit 110 may not store the information.

  In the above-described embodiment, the predetermined period for outputting the operation confirmation sound is ended when the set time has elapsed from the start thereof, but may be ended when a predetermined event occurs.

  In the above embodiment, the user can designate the first sound source information from the plurality of first sound source information candidates. However, the user can specify the length of a predetermined period for outputting the operation confirmation sound. It may be possible to specify.

  In the above-described embodiment, the control unit 160 performs control processing for generating output sound by executing a program. However, all or part of the control unit 160 is configured with a dedicated LSI (Large Scale Integrated circuit). ) Etc. may be performed by hardware.

  Further, the program executed by the control unit 160 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. You may be made to do.

From the first viewpoint, the present invention is an acoustic device that supplies a sound signal to a sound output unit that outputs a sound toward the outside of the vehicle, the first sound source information stored in the storage unit, and the sound source A supply unit that generates sound signals with reference to at least one sound source information of second sound source information different from the first sound source information and outputs the sound signal to the sound output unit; a control unit that controls the supply unit; The first sound source information is sound source information related to operation confirmation sound, the second sound source information is sound source information related to vehicle recall sound, and the control unit starts after the acoustic device is operable. Until the predetermined period ends, the supply unit generates the first sound signal by referring to the first sound source information, and at least after the predetermined period ends, the supply unit refers to the second sound source information. To generate a second sound signal. It is an acoustic device to.

From a second viewpoint, the present invention generates a sound signal by referring to at least one sound source information of the first sound source information and second sound source information different from the first sound source information stored in the storage unit. An output sound control method used in an acoustic device that includes a supply unit that outputs to a sound output unit and outputs sound from the sound output unit toward the outside of the vehicle, wherein the acoustic device is operable A first control step of causing the supply unit to generate a first sound signal with reference to the first sound source information until a predetermined period starting after the end of the supply; and at least after the predetermined period ends, the supply A second control step of causing the unit to generate a second sound signal with reference to the second sound source information, wherein the first sound source information is sound source information related to an operation confirmation sound, and the second sound source information is a vehicle recall. a sound source information related to sound, this Is the output sound control method characterized.

Claims (9)

An acoustic device that supplies a sound signal to a sound output unit that outputs sound toward the outside of the vehicle,
Supply that generates sound signals with reference to at least one sound source information of first sound source information and second sound source information different from the first sound source information stored in the storage unit and outputs the sound signal to the sound output unit Part;
A control unit for controlling the supply unit;
The controller is
Until the predetermined period starting after the acoustic device becomes operable is made to supply the first sound signal with reference to the first sound source information in the supply unit,
At least after the predetermined period ends, the supply unit generates a second sound signal with reference to the second sound source information;
An acoustic device characterized by that. The supply unit
Before the predetermined period ends, a synthesized signal obtained by synthesizing the first sound signal and the second sound signal is output to the sound output unit,
After the predetermined period ends, the second sound signal is output to the sound output unit.
The acoustic device according to claim 1. An acquisition unit for acquiring drive information including an operation state of the vehicle drive mechanism and a speed of the vehicle;
The control unit controls generation of the second sound signal by the supply unit based on the driving information.
The acoustic device according to claim 1, wherein the acoustic device is characterized.   The sound according to claim 3, wherein the control unit controls the supply unit to generate a silence signal as the second sound signal when the drive mechanism is not operating. apparatus.   5. The acoustic device according to claim 1, wherein the operation start condition of the acoustic device is a start of power supply to an electrical component equipped in the vehicle.   6. The apparatus according to claim 1, further comprising: a designation unit that designates one of the plurality of first sound source information candidates stored in the storage unit as the first sound source information. The acoustic device described. A supply unit that generates a sound signal with reference to at least one sound source information of the first sound source information and second sound source information different from the first sound source information stored in the storage unit and outputs the sound signal to the sound output unit An output sound control method used in an audio device that outputs sound from the sound output unit toward the outside of the vehicle,
A first control step of causing the supply unit to generate a first sound signal with reference to the first sound source information until a predetermined period starting after the acoustic device is operable;
A second control step of causing the supply unit to generate a second sound signal with reference to the second sound source information at least after the predetermined period ends;
An output sound control method comprising:   An output sound control program for causing a calculation unit to execute the output sound control method according to claim 7.   9. A recording medium, wherein the output sound control program according to claim 8 is recorded so as to be readable by an arithmetic unit.

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