WO2013145187A1 - 音響装置、出力音管理装置、端末装置及び出力音制御方法 - Google Patents
音響装置、出力音管理装置、端末装置及び出力音制御方法 Download PDFInfo
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- WO2013145187A1 WO2013145187A1 PCT/JP2012/058243 JP2012058243W WO2013145187A1 WO 2013145187 A1 WO2013145187 A1 WO 2013145187A1 JP 2012058243 W JP2012058243 W JP 2012058243W WO 2013145187 A1 WO2013145187 A1 WO 2013145187A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q5/00—Arrangement or adaptation of acoustic signal devices
- B60Q5/005—Arrangement or adaptation of acoustic signal devices automatically actuated
- B60Q5/008—Arrangement or adaptation of acoustic signal devices automatically actuated for signaling silent vehicles, e.g. for warning that a hybrid or electric vehicle is approaching
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K15/00—Acoustics not otherwise provided for
- G10K15/02—Synthesis of acoustic waves
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
Definitions
- the present invention relates to an audio device, an output sound management device, a terminal device, an output sound control method and an output sound control program, and a recording medium on which the output sound control program is recorded.
- Patent Document 1 hereinafter referred to as “conventional example”.
- this conventional technique an external output sound signal is generated and an external output sound is output from a speaker to the front outside the vehicle or the like.
- the reason why the external output sound is output to the outside of the vehicle by applying the above-described conventional technique is to notify the pedestrian of the approach of the vehicle and to alert the pedestrian. For this reason, it is necessary to make an external output sound reach from the speaker at a sound pressure level sufficient for the alerting target in a range where the alerting target person can exist.
- the relationship between the signal level of the external output sound signal and the sound pressure level of the external output sound is measured in advance, and the signal level of the external output sound signal is determined based on the measurement result. It is necessary to adjust. It is also conceivable to perform such measurement using a technique in which various sounds generated during vehicle travel are manually operated in an anechoic chamber.
- the present invention has been made in view of the above circumstances, and is a new acoustic device, output sound management device, terminal device, and output sound control method for performing processing for outputting an external output sound having an appropriate sound pressure level.
- the purpose is to provide.
- the present invention is an acoustic device that supplies an external output sound signal to an external sound output unit that outputs sound toward the outside of the vehicle, and is disposed at a predetermined position outside the vehicle.
- a first acquisition unit that acquires a sound pressure level of the sound output by the external sound output unit collected by the sound collection unit; a sound pressure level acquired by the first acquisition unit; and a control unit that controls a signal level of the external output sound signal based on a target sound pressure level.
- the present invention is an acoustic device that supplies an external output sound signal to an external sound output unit that outputs sound toward the outside of the vehicle, and is disposed at a predetermined position outside the vehicle.
- the present invention receives the sound pressure level of the sound output by the external sound output unit installed in the vehicle and collected by the sound collection unit arranged at a predetermined position outside the vehicle.
- a generating unit that generates control information of the signal level of the external output sound signal based on a reception result by the receiving unit and a target sound pressure level at the predetermined position; a generation result by the generating unit And an output sound management device.
- the present invention is a terminal device arranged in a vehicle, and is output by an external sound output unit installed in the vehicle, and is collected at a predetermined position outside the vehicle.
- a sound pressure level acquisition unit that acquires a sound pressure level of the sound collected by the unit; a transmission unit that transmits an acquisition result by the sound pressure level acquisition unit; an acquisition result by the sound pressure level acquisition unit;
- a receiving unit that receives control information of the signal level of the external output sound signal generated based on the target sound pressure level at the position; and based on a reception result by the receiving unit, the signal level of the external output sound signal
- a control unit for controlling the terminal device.
- an output sound control method for controlling an external output sound signal to an external sound output unit that outputs a sound toward the outside of the vehicle, and is output by the external sound output unit.
- the present invention is an output sound control program characterized by causing an arithmetic unit to execute the output sound control method of the present invention.
- 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.
- FIG. 4 is a flowchart for explaining adjustment value determination processing in the apparatus of FIG. 3.
- FIG. It is a flowchart for demonstrating the measurement process of the sound pressure level of FIG.
- FIG. It is a block diagram for demonstrating positioning of the terminal device and server apparatus which concern on 2nd Example of this invention.
- FIG. 1 shows a schematic configuration of an acoustic device 700 according to the first embodiment.
- the acoustic device 700 is mounted on a vehicle CR that uses electric energy as part or all of driving energy.
- An external sound output unit 910 is installed in the vehicle CR.
- the external sound output unit 910 includes a speaker SP that outputs an external output sound toward the outside of the vehicle in accordance with an external output sound signal sent from the acoustic device 700.
- the acoustic device 700 includes a storage unit 710, an input unit 720, and an acquisition unit 730 as a first acquisition unit and a second acquisition unit.
- the acoustic device 700 includes a control unit 740A, a sound source unit 750, and a sound signal generation unit 760.
- the storage unit 710 stores various information used in the audio device 700. Such information includes speaker characteristic information and a sound pressure adjustment table.
- the control unit 740A can access the storage unit 710.
- the speaker characteristic information includes a sound pressure level attenuation characteristic associated with an increase in the propagation distance of the external output sound output from the speaker SP of the external sound output unit 910.
- the attenuation characteristic is expressed as being proportional to 1 / (distance) 2 .
- the above sound pressure adjustment table includes at least one individual table.
- one of the individual tables is a user table that is uniquely used by the user. Further, if it is necessary to change the sound pressure adjustment mode due to different countries, regions, etc., a necessary number of individual tables are prepared.
- adjustment target frequency for each frequency to be adjusted (hereinafter referred to as “adjustment target frequency”), a distance from the vehicle CR and a necessary sound pressure level are associated and registered. Further, in the individual table, the adjustment value of the sound pressure level is registered for each frequency to be adjusted.
- the input unit 720 includes a keyboard and the like. When the user operates the input unit 720, the operation content of the audio device 700 is set. Such settings include switching between the normal operation mode and the sound pressure measurement operation mode, setting measurement conditions in the sound pressure measurement operation mode, and setting individual tables to be referred to in the normal operation mode.
- the input result to the input unit 720 is sent to the acquisition unit 730.
- the measurement conditions include the distance between the microphone constituting the sound collection unit 950 and the vehicle CR and designation of the target sound pressure.
- the target sound pressure designation individual table designation or one or more explicit designations of a set of adjustment target frequency, distance and required sound pressure level are possible.
- the acquisition unit 730 receives the sound collection result transmitted from the sound collection unit 950 including a microphone. Then, the acquisition unit 730 sends the sound collection result to the control unit 740A.
- the acquisition unit 730 receives the input result sent from the input unit 720. Then, the acquisition unit 730 sends the input result to the control unit 740A.
- control unit 740A is configured to output from the external sound output unit 910 based on the measurement condition setting result sent from the acquisition unit 730 and the sound collection result sent from the sound collection unit 950. Controls the sound pressure level of the test sound as the external output sound that is output. In the normal operation mode, the control unit 740A controls the sound pressure level of the external output sound output from the external sound output unit 910 based on the setting result of the individual table sent from the acquisition unit 730.
- control unit 740A Details of processing executed by the control unit 740A will be described later.
- the sound source unit 750 stores sound data corresponding to the external output sound. Such sound data includes sound data corresponding to the external output sound in the normal operation mode, and test sound data that is sound data corresponding to the frequency component to be adjusted in the external output sound in the normal operation mode. Yes.
- the sound signal generation unit 760 can access the sound source unit 750.
- the sound signal generation unit 760 has an equalizer function, and generates an external output sound signal under the control of the control unit 740A.
- the sound signal generation unit 760 first reads the sound data specified by the control unit 740A from the sound source unit 750. Then, the sound signal generation unit 760 adjusts the signal level specified by the control unit 740A based on the read sound data, and generates an external output sound signal. The external output sound signal thus generated is sent to the external sound output unit 910.
- each of the microphones constituting the sound collection unit 950 is disposed at a position outside the vehicle CR corresponding to the target sound pressure.
- the sound collection unit 950 is connected to the acquisition unit 730 of the audio device 700.
- the control unit 740A starts the sound pressure measurement process.
- the control unit 740A that has received the measurement conditions first determines a target sound pressure level at the microphone position of the sound collection unit 950 for each of the adjustment target frequencies included in the measurement conditions. In determining such a target sound pressure level, an individual table is designated as an adjustment target frequency (for example, a target sound pressure designation in a measurement condition) in which only one pair of distance and a required sound pressure level is designated.
- the control unit 740A refers to the speaker characteristic information in the storage unit 710, and the control unit 740A refers to the speaker characteristic information in the storage unit 710 for the frequency for which only one pair of the distance from the vehicle CR and the required sound pressure level is designated.
- the sound pressure level at the sound collection position of the sound collection unit 950 corresponding to the pressure level is determined as the target sound pressure level.
- an individual table is designated as an adjustment target frequency (for example, a target sound pressure designation of measurement conditions) in which a plurality of distances and required sound pressure level pairs are designated, and the distance from the vehicle CR is necessary in the individual table.
- the control unit 740A refers to the speaker characteristic information in the storage unit 710 and identifies the pair that requires the highest test sound signal level. To do. Then, the sound pressure level at the sound collection position of the sound collection unit 950 corresponding to the required sound pressure level in the identified pair is determined as the target sound pressure level corresponding to the adjustment target frequency.
- the control unit 740A executes a sound pressure measurement control process for each adjustment target frequency while setting the adjustment target frequency as the measurement target frequency.
- the control unit 740A first sends a test sound signal generation command specifying the measurement target frequency and a predetermined gain value to the sound signal generation unit 760. .
- the sound signal generation unit 760 Upon receiving the test sound signal generation instruction, the sound signal generation unit 760 reads sound data corresponding to the test sound of the designated measurement target frequency from the sound source unit 750. Subsequently, the sound signal generation unit 760 generates a test sound signal as an external output sound signal based on the read sound data and the designated gain value. Then, the sound signal generation unit 760 sends the generated external output sound signal to the external sound output unit 910. As a result, a test sound is output from the speaker SP of the external sound output unit 910.
- the control unit 740A receives the sound collection result by the sound collection unit 950 via the acquisition unit 730. Then, the control unit 740A calculates an error between the sound pressure level at the sound collection position of the test sound and the target sound pressure level based on the sound collection result sent from the sound collection unit 950.
- control unit 740A derives a gain value that is estimated to reduce the error based on the calculated error and the current gain value. Then, the control unit 740A sends a gain correction specification specifying the derived gain value to the sound signal generation unit 760.
- the test sound signal subjected to gain correction is sent from the sound signal generation unit 760 to the external sound output unit 910. Then, the sound pressure level at the sound collection position by the sound collection unit 950 changes.
- the control unit 740A calculates the error between the sound pressure level at the sound collection position of the test sound and the target sound pressure level, and specifies the gain correction. Repeat until the previously calculated error is exceeded. When the newly calculated error is equal to or greater than the previously calculated error, the control unit 740A sets the gain value from which the previously calculated error is obtained as an adjustment value corresponding to the current measurement target frequency. Are registered in the sound pressure adjustment table in the storage unit 710.
- the control unit 740A uses the gain value obtained from the previous error as the designated individual table. Are registered as adjustment values corresponding to the current frequency to be measured. On the other hand, when the frequency, distance, and required sound pressure level are specified as the target sound pressure specification under the set measurement conditions, the gain value obtained from the previous error is stored in the user table. Then, it is registered as an adjustment value corresponding to the current frequency to be measured.
- the adjustment values that satisfy the target sound pressure designation in the measurement conditions for all the adjustment target frequencies are registered in the sound pressure adjustment table in the storage unit 710.
- the control unit 740A sets the setting according to the setting of the individual table to be referred to that is specified most recently by the input operation to the input unit 720 by the user. Refer to the individual table. Then, the control unit 740A controls the sound signal generation unit 760 so that the adjustment value corresponding to the adjustment target frequency registered in the referenced individual table is the gain value of the component of the adjustment target frequency. As a result, an external output sound in which the output volume is minimized while satisfying the necessary sound pressure level condition designated by the user is output from the external sound output unit 910.
- the control unit 740A when the measurement condition including the pair of the distance from the vehicle CR and the required sound pressure level is designated in the sound pressure measurement operation mode, the control unit 740A
- the sound signal generator 760 generates a test sound signal as an external output sound signal, and causes the external sound output unit 910 to output a test sound as an external output sound.
- the test sound output outside the vehicle is collected by the sound collection unit 950.
- the control unit 740A controls the signal level of the test sound signal based on the sound collection result by the sound collection unit 950, so that the external output sound propagating in the vehicle exterior space satisfies the necessary sound pressure level condition and the output sound volume. An adjustment value of the signal level of the test sound signal that can minimize the signal is obtained. Then, the control unit 740A registers the obtained adjustment value in the sound pressure adjustment table in the storage unit 710.
- the adjustment value of the signal level of the test sound signal is obtained for each of the plurality of adjustment target frequencies. For this reason, it is possible to finely optimize the sound pressure level of the external output sound.
- FIG. 2 shows a schematic configuration of the terminal device 810 and the output sound management device 820 according to the second embodiment.
- the terminal device 810 is installed in the vehicle CR and operates.
- the output sound management device 820 is disposed outside the vehicle CR.
- the terminal device 810 and the output sound management device 820 can communicate with each other via the network 850.
- the output sound management device 820 can communicate with other terminal devices configured in the same manner as the terminal device 810, but only the terminal device 810 is representatively shown in FIG.
- the terminal device 810 includes a control unit 740B instead of the control unit 740A, a transmission unit 811 and a reception unit 812, and a storage unit 710.
- the difference is that a storage unit 815 is provided instead.
- the description will be given mainly focusing on this difference.
- the control unit 740B receives the sound collection result sent from the sound collection unit 950 via the acquisition unit 730. Then, the control unit 740B sends the sound collection result to the transmission unit 811 as terminal transmission data.
- the control unit 740 ⁇ / b> B receives the measurement condition via the acquisition unit 730 when the setting of the measurement condition is input to the input unit 720 in the sound pressure measurement operation mode. Then, the control unit 740B sends the measurement condition to the transmission unit 811 as terminal transmission data.
- control unit 740B transmits the control information of the sound pressure of the external output sound output from the external sound output unit 910 transmitted from the output sound management device 820 in the sound pressure measurement operation mode to the network 850 and the reception unit 812. Receive via. Then, the control unit 740B controls the signal level of the test sound signal according to the control information. Further, similarly to the control unit 740A described above, the control unit 740B instructs the sound signal generation unit 760 to generate an external output sound signal in the sound pressure measurement operation mode and the normal operation mode. The signal level of the external output signal is controlled in the normal operation mode.
- control unit 740B Details of processing executed by the control unit 740B will be described later.
- the transmission unit 811 receives the terminal transmission data transmitted from the control unit 740B. Then, the transmission unit 811 transmits the terminal transmission data to the output sound management apparatus 820 via the network 850.
- the reception unit 812 receives the sound pressure control information of the external output sound transmitted from the output sound management device 820 via the network 850. Then, the receiving unit 812 sends the control information to the control unit 740B.
- a sound pressure adjustment table is stored in the same manner as the storage unit 710 described above.
- the storage unit 815 is different from the storage unit 710 in that speaker characteristic information is not stored.
- the output sound management device 820 includes a reception unit 821, a generation unit 822, a transmission unit 823, and a storage unit 825.
- the receiving unit 821 receives terminal transmission data transmitted from the terminal device 810 via the network 850. Then, the reception unit 821 sends the received terminal transmission data to the generation unit 822.
- the generation unit 822 receives the measurement condition and the sound collection result transmitted from the reception unit 821 as terminal transmission data. And the production
- the transmission unit 823 receives the control information transmitted from the generation unit 822. Then, the transmission unit 823 transmits the control information to the terminal device 810 via the network 850.
- speaker characteristic information is stored in the same manner as the storage unit 710 described above.
- the storage unit 825 is different from the storage unit 710 in that the sound pressure adjustment table is not stored.
- the target sound pressure level collected by the control unit 740B and the sound collection result by the sound collection unit 950 are the transmission unit 811, the network 850, and the reception unit 821. Is sent to the generation unit 822.
- the control information generated by the generation unit 822 is sent to the control unit 740B via the transmission unit 823, the network 850, and the reception unit 812.
- each of the microphones of the sound collection unit 950 is disposed at a position outside the vehicle CR corresponding to the target sound pressure, and the sound collection is performed. Assume that unit 950 is connected to acquisition unit 730 of terminal device 810.
- the control unit 740B of the terminal device 810 sends the set measurement conditions to the generation unit 822 of the sound output management device 820.
- the generation unit 822 that has received the measurement condition refers to the speaker characteristic information in the storage unit 825, and similarly to the control unit 740A of the first embodiment described above, for each of the adjustment target frequencies included in the measurement condition.
- a target sound pressure level in the sound collection unit 950 is determined.
- the generation unit 822 sends control information specifying the first measurement target frequency and a predetermined gain value to the control unit 740B.
- the control unit 740B Upon receipt of this control information, the control unit 740B sends a test sound signal generation command specifying the measurement target frequency and gain value specified by the control information to the sound signal generation unit 760.
- the sound signal generation unit 760 that has received the test sound signal generation instruction generates a test sound signal as an external output sound signal in the same manner as in the first embodiment described above.
- the external output sound signal is sent to the external sound output unit 910. As a result, a test sound is output from the speaker SP of the external sound output unit 910.
- control unit 740B receives the sound collection result by the sound collection unit 950 via the acquisition unit 730. Then, the control unit 740B sends the sound collection result to the generation unit 822.
- the generation unit 822 that has received the sound collection result calculates an error between the sound pressure level at the sound collection position of the test sound and the target sound pressure level in the same manner as the control unit 740A described above based on the sound collection result. To do. Subsequently, the generation unit 822 derives a gain value that is estimated to reduce the error based on the calculated error and the current gain value. Then, the generation unit 822 sends a gain correction designation to the derived gain value as control information to the control unit 740B.
- the control unit 740B that has received the control information including the gain correction designation sends the gain correction designation to the sound signal generation unit 760, and then sends a report on the completion of the gain correction designation to the generation unit 822.
- control unit 740B transmits the collected sound result to the generating unit 822 by the sound collecting unit 950, the gain correction designation by the control information sent from the generating unit 822, and the completion of the gain correction designation to the generating unit 822. Repeat the report. Further, the generation unit 822 repeats error calculation until the newly calculated error after receiving the completion of the gain correction designation sent from the control unit 740B becomes equal to or greater than the previously calculated error.
- the generation unit 822 sets the gain value from which the previously calculated error is obtained as an adjustment value corresponding to the current measurement target frequency. To decide. Then, the generation unit 822 sends an individual measurement end notification including a pair of the current measurement target frequency and the determined adjustment value to the control unit 740B. Upon receiving this individual measurement end notification, the control unit 740B registers the determined gain value in the sound pressure adjustment table in the storage unit 815 as an adjustment value corresponding to the current measurement target frequency.
- control unit 740B and the generation unit 822 repeat the same processing as described above until the adjustment values corresponding to the respective adjustment target frequencies set in the measurement conditions are determined. Then, after sending individual measurement end notifications for all the adjustment target frequencies set in the measurement conditions, the generation unit 822 sends a measurement end notification to the control unit 740B.
- the adjustment value of the signal level of the external output sound signal is determined in accordance with the measurement condition set by the user, and is registered in the sound pressure adjustment table in the storage unit 815.
- the control unit 740B In the normal operation mode and when the vehicle CR is traveling, the control unit 740B is designated the latest by an input operation to the input unit 720 by the user in the same manner as the control unit 740A described above.
- the set individual table is referenced according to the setting of the individual table to be referred to.
- the control unit 740B controls the sound signal generation unit 760 so that the adjustment value corresponding to the adjustment target frequency registered in the referenced individual table is the gain value of the component of the adjustment target frequency.
- the test sound output to the outside of the vehicle CR is collected by the sound collection unit 950 in the sound pressure measurement operation mode.
- the control unit 740B of the terminal device 810 and the generation unit 822 of the output sound management device 820 cooperate to control the signal level of the test sound signal based on the result of sound collection by the sound collection unit 950.
- An external output sound propagating in space obtains an adjustment value of the signal level of the test sound signal that can minimize the output volume while satisfying the necessary sound pressure level condition. Then, the obtained adjustment value is registered in the sound pressure adjustment table in the storage unit 815.
- the gain value from which the previously calculated error is obtained is adjusted.
- the value is registered in the sound pressure adjustment table.
- the gain value at that time may be registered in the sound pressure adjustment table as an adjustment value.
- a test sound is output for each frequency to be adjusted, and a corresponding adjustment value is determined for each frequency to be adjusted.
- a sound based on the sound data corresponding to the external output sound in the normal operation mode is output as a test sound, and a frequency analysis of the sound collection result is performed, and each adjustment target frequency is supported.
- the adjustment value may be determined.
- one sound collection unit 950 is used, and the sound pressure level is measured without changing the position of the sound collection unit 950.
- the sound collection unit is measured each time the sound pressure level at one distance is measured. You may make it change the position of 950 microphones to the position designated by the measurement conditions.
- the target sound pressure level determination process can be omitted.
- the acoustic device includes the storage unit, the input unit, the sound source unit, and the sound signal generation unit.
- the elements that can be shared may be used.
- a sharable element can be omitted as a component of the acoustic device.
- the terminal device includes a storage unit, an input unit, a sound source unit, and a sound signal generation unit.
- the elements that can be shared may be used.
- a sharable element can be omitted as a component of the terminal device.
- the output sound management device holds the speaker characteristic information.
- speaker characteristic information may be transmitted from the terminal device to the output sound management device every time measurement conditions are generated.
- the acquisition unit, the control unit, and the sound signal generation unit of the acoustic device are a computer as a calculation unit including a central processing unit (CPU: Central Processing Unit), a DSP (Digital Signal Processing), and the like. It is possible to execute a part or all of the processing of these elements by executing a program prepared in advance on the computer.
- 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.
- the acquisition unit, the control unit, the sound signal generation unit, and the output sound management device generation unit of the terminal device of the second embodiment described above are a central processing unit (CPU: Central Processing Unit), a DSP (Digital Signal Processing Unit). ) Etc., and a part or all of the processing of these elements may be executed by executing a program prepared in advance on the computer.
- 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.
- FIG. 3 shows a schematic configuration of the navigation 100 as the acoustic device according to the first embodiment. This is an aspect of the acoustic device 700 (see FIG. 1) of the first embodiment described above.
- the navigation device 100 is mounted on a vehicle CR that uses electric energy as part or all of driving energy.
- An external sound output unit 210 as an external sound output unit 910 is installed in the vehicle CR.
- the external sound output unit 210 includes a speaker SP that outputs an external output sound toward the outside of the vehicle in accordance with an external output sound signal sent from the navigation device 100.
- the navigation device 100 includes a control unit 110 ⁇ / b> A and a storage unit 120 as the storage unit 710.
- the navigation device 100 includes a sound output unit 130, a display unit 140, and an input unit 150 as the input unit 720.
- the navigation device 100 includes a sensor unit 160 and a GPS (Global Positioning System) receiving unit 170.
- GPS Global Positioning System
- the control unit 110A controls the entire navigation device 100.
- the control unit 110A will be described later.
- the storage unit 120 includes a nonvolatile storage device such as a hard disk device.
- the storage unit 120 can be accessed by the control unit 110A. Information data stored in the storage unit 120 will be described later.
- the above-described sound output unit 130 includes a speaker, and outputs a sound corresponding to the sound data sent from the control unit 110A.
- This sound output unit 130 outputs guidance voices such as the traveling direction of the vehicle CR, the traveling situation, and the traffic situation regarding the navigation processing under the control of the control unit 110A.
- the display unit 140 includes a display device such as a liquid crystal panel, and displays an image corresponding to the display data sent from the control unit 110A.
- This display unit 140 displays images such as map information and route information, guidance information, and the like during navigation processing under the control of the control unit 110A.
- the input unit 150 includes a key unit provided in the main body of the navigation device 100 and / or a remote input device including the key unit.
- a key part provided in the main body part a touch panel provided in a display device of the display unit 140 can be used.
- it can replace with the structure which has a key part, or can also employ
- the operation content of the navigation device 100 is set and an operation command is performed.
- the user uses the input unit 150 to set a destination or the like related to route search in the navigation process.
- the user also uses the input unit 150 to set the switching between the normal operation mode and the sound pressure measurement operation mode and the measurement conditions in the sound pressure measurement operation mode.
- Such input contents are sent as input data from the input unit 150 to the control unit 110A.
- the sensor unit 160 includes a vehicle speed sensor, an acceleration sensor, an angular velocity sensor, a tilt sensor, and the like. Detection results from various sensors included in the sensor unit 160 are sent as sensor data to the control unit 110A.
- the GPS receiving unit 170 described above calculates the current position of the vehicle CR based on reception results of radio waves transmitted from a plurality of GPS satellites. Further, the GPS receiving unit 170 measures the current time based on the date / time information transmitted from the GPS satellite. Information on these current position and current time is sent to the control unit 110A as GPS data.
- the storage unit 120 stores various information data used in the navigation device 100. As shown in FIG. 4, such information data includes map information data MPD, sound source data SSD, speaker characteristic information SPD, and sound pressure adjustment table TBL.
- the above map information data MPD includes road information such as road network information.
- the sound source data SSD includes sound data corresponding to the external output sound in the normal operation mode and sound data corresponding to the test sound that is the external output sound in the sound pressure measurement operation mode.
- the test sound is a sound having a frequency component to be adjusted in the external output sound in the normal operation mode.
- the speaker characteristic information SPD includes information on the attenuation characteristic of the sound pressure level as the propagation distance of the external output sound output from the speaker SP of the external sound output unit 210 increases. For example, when the external output sound output from the speaker SP is a spherical wave, the attenuation characteristic is expressed as being proportional to 1 / (distance) 2 .
- the above sound pressure adjustment table TBL includes individual tables # 1,.
- the individual table # 1 is a user table that is uniquely used by the user. Also, in the sound pressure adjustment table TBL, if the sound pressure adjustment mode needs to be changed due to different countries, regions, etc., the number of individual items necessary for changing the sound pressure adjustment mode is required. Table # 2, ... will be included.
- an adjustment value G jk is registered for each adjustment target frequency F jk in the individual table #j.
- the adjustment value G jk is a parameter value for controlling the sound pressure of the component of the adjustment target frequency F jk of the external output sound in the normal operation mode.
- the control unit 110A includes a central processing unit (CPU) and its peripheral circuits.
- Various functions as the navigation device 100 are realized by the control unit 110A executing various programs. These functions include functions as the acquisition unit 730, the control unit 740A, and the sound signal generation unit 760 in the first embodiment described above.
- control unit 110A is recorded on a computer-readable recording medium such as a hard disk, a CD-ROM, or a DVD, and is loaded from the recording medium and executed.
- 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.
- the control unit 110A appropriately refers to the map information data MPD in the storage unit 120 based on the sensor data received from the sensor unit 160 and the GPS data received from the GPS receiving unit 170, and provides navigation information to the user.
- the navigation information providing processing includes (a) a map display for displaying a map of an area designated by the user on the display device of the display unit 140, (b) where the vehicle CR is located on the map, , Map matching to calculate which direction it is heading, (c) route search from the position where the vehicle currently exists to a destination which is an arbitrary position designated by the user, (d) to the set route When driving to the destination along, calculation of the predicted arrival time to the destination, (e) the map matching result, the calculated predicted arrival time, and the advice of the direction to proceed, are performed, Processing such as control for displaying guidance on the display device of the display unit 140 and control for outputting voice guidance from the speaker of the sound output unit 130 is included.
- control unit 110 ⁇ / b> A in the sound pressure measurement operation mode, the control unit 110 ⁇ / b> A generates a test sound that is an external output sound output from the external sound output unit 210 based on the sound collection result sent from the sound collection unit 610 including a microphone. Control the pressure level. Further, the control unit 110A controls the sound pressure level of the external output sound according to the contents of the individual table that is designated to be referred to in the normal operation mode.
- the sound pressure level control process of the external output sound executed by the control unit 110A will be described later.
- step S11 the control unit 110A determines whether or not measurement conditions are newly set.
- the measurement conditions include the distance between the microphone included in the sound collection unit 610 and the vehicle CR, and target sound pressure designation.
- target sound pressure designation designation of any one of the individual tables # 1,... Or one or more explicit designations of a set of adjustment target frequency, distance, and required sound pressure level is possible. .
- step S11: N If the result of the determination in step S11 is negative (step S11: N), the process of step S11 is repeated. If measurement conditions are newly set and the result of determination in step S11 is affirmative (step S11: Y), the process proceeds to step S12.
- the control unit 110A registers the contents of the explicit designation in the user table (individual table # 1) in the storage unit 120.
- step S12 the control unit 110A determines the first measurement target frequency from the adjustment target frequencies included in the set measurement conditions. Subsequently, in step S13, the control unit 110A determines the target sound pressure level by referring to the speaker characteristic information SPD in the storage unit 120 and the individual table corresponding to the measurement conditions.
- the control unit 110A determines that a plurality of distances and required sound pressure level pairs are specified for the measurement target frequency (for example, the individual table as target sound pressure specification of the measurement condition And a plurality of pairs of distances from the vehicle CR and required sound pressure level are registered in the individual table), the test sound signal is based on the speaker characteristic information SPD in the storage unit 120. The pair that needs the highest signal level is identified. Then, the control unit 110A determines the sound pressure level at the sound collection position of the sound collection unit 610 corresponding to the required sound pressure level in the identified pair based on the speaker characteristic information SPD as the target sound pressure corresponding to the measurement target frequency. Decide on the level.
- step S14 a sound pressure level measurement process for the measurement target frequency is performed. Details of the sound pressure level measurement process will be described later.
- step S14 the process proceeds to step S15.
- the control unit 110A determines whether or not the sound pressure level measurement process has been completed for all the adjustment target frequencies specified by the measurement conditions.
- step S15 If the result of the determination in step S15 is negative (step S15: N), the process proceeds to step S16.
- step S16 the control unit 110A determines the next measurement target frequency, and then determines the target sound pressure level in the same manner as in step S12 described above. Then, the process returns to step S13.
- step S13 to S16 are repeated until the result of the determination in step S15 becomes affirmative. Then, when the result of the determination in step S15 is affirmative (step S15: Y), the process returns to step S11. Thereafter, the processes in steps S11 to S16 are repeated.
- step S21 the control unit 110A determines a predetermined gain value as an initial gain.
- step S22 the control unit 110A reads sound data corresponding to the test sound of the measurement frequency from the storage unit 120.
- step S22 the control unit 110A generates a test sound signal as an external output sound signal based on the read sound data and the determined gain value.
- the control unit 110A sends the generated external output sound signal to the external sound output unit 210.
- a test sound is output from the speaker SP of the external sound output unit 210.
- the control unit 110A collects the sound collection results by the sound collection unit 610 over a period of a predetermined period length.
- step S23 the control unit 110A calculates the sound pressure level of the test sound based on the collected sound collection results. Then, an error between the calculated sound pressure level of the test sound and the target sound pressure level is calculated.
- step S24 the control unit 110A determines whether or not the error calculation in the previous step S23 was the first error calculation related to the target sound pressure level of the current measurement target frequency. If the result of this determination is affirmative (step S24: Y), the process proceeds to step S25.
- step S25 the control unit 110A derives a gain value that is estimated to reduce the error based on the calculated error. Then, the control unit 110A performs gain correction control according to the derived gain value on the test sound signal. Then, the process returns to step S22.
- step S24 N
- the control unit 110A determines whether or not the newly calculated error is less than the previously calculated error, so that the sound pressure level of the test sound is higher than that at the previous error calculation time. It is determined whether or not the target sound pressure level is approached.
- step S26 If the result of the determination in step S26 is affirmative (step S26: Y), the process proceeds to step S25.
- step S25 as described above, a gain value that is estimated to reduce the error is derived based on the calculated error. Then, the control unit 110A performs gain correction control according to the derived gain value on the test sound signal. Then, the process returns to step S22.
- step S26 N
- step S27 the control unit 110A determines the gain value from which the previously calculated error is obtained as an optimum adjustment value corresponding to the frequency to be measured. Subsequently, the control unit 110A registers the determined adjustment value in association with the adjustment target frequency that is the current measurement target frequency in the individual table corresponding to the measurement condition. Thereafter, the process proceeds to step S15 in FIG.
- the adjustment values satisfying the target sound pressure specification specified in the measurement conditions for all the adjustment target frequencies are registered in the individual table in the measurement conditions in the sound pressure adjustment table TBL in the storage unit 120. .
- the control unit 110A follows the setting of the individual table to be referred to that is specified most recently by the input operation to the input unit 150 by the user. Refer to the set individual table. Then, the control unit 110A performs control on the external output signal so that the adjustment value corresponding to the adjustment target frequency registered in the referenced individual table is the gain value of the component of the adjustment target frequency. As a result, an external output sound in which the output volume is minimized while satisfying the necessary sound pressure level specified by the user is output from the external sound output unit 210.
- the control unit 110A when the measurement condition including the pair of the distance from the vehicle CR and the required sound pressure level is designated in the sound pressure measurement operation mode, the control unit 110A By generating a test sound signal as an external output sound signal, a test sound is output from the external sound output unit 210 as an external output sound. By controlling the signal level of the test sound signal based on the sound collection results of the test sound collection units 610 output outside the vehicle in this way, the control unit 110A needs the external output sound that propagates outside the vehicle. An adjustment value of the signal level of the test sound signal that can minimize the output sound volume while satisfying the sound pressure level condition is obtained. Then, the control unit 110A registers the obtained adjustment value in the sound pressure adjustment table TBL in the storage unit 120.
- the adjustment value of the signal level of the test sound signal is obtained for each of the plurality of adjustment target frequencies. For this reason, it is possible to finely optimize the sound pressure level of the external output sound.
- FIG. 7 shows the relationship between the arrangement positions of the terminal device 300 and the server device 400 according to the second embodiment.
- the terminal device 300 is an aspect of the terminal device 810 in the second embodiment
- the server apparatus 400 is an aspect of the output sound management device 820 in the second embodiment.
- the terminal device 300 is arranged in the vehicle CR.
- This vehicle CR is provided with an external sound output unit 210 as in the case of the first embodiment described above.
- the server device 400 is arranged outside the vehicle CR.
- the terminal device 300 and the server device 400 can communicate with each other via the network 500.
- the server device 400 can communicate with other terminal devices configured in the same manner as the terminal device 300, but only the terminal device 300 is representatively shown in FIG.
- FIG. 8 shows a schematic configuration of the terminal device 300.
- the terminal device 300 includes a control unit 110B instead of the control unit 110A, as compared with the navigation device 100 of the first embodiment described above, and a storage unit instead of the storage unit 120.
- the difference is that a storage unit 310 as 815 is provided.
- the terminal device 300 is different from the navigation device 100 of the first embodiment in that it does not include the sensor unit 160 and further includes a wireless communication unit 320 as a transmission unit 811 and a reception unit 812.
- description will be made mainly focusing on these differences.
- the control unit 110B includes a central processing unit (CPU) and its peripheral circuits, and performs overall control of the entire terminal device 300.
- Various functions as the terminal device 300 are realized by the control unit 110B executing various programs. These functions include functions as the acquisition unit 730, the control unit 740B, and the sound signal generation unit 760 in the second embodiment described above.
- the control unit 110B acquires the GPS data received from the GPS receiving unit 170, and specifies the current position and the current time based on the acquired GPS data.
- the control unit 110B receives the sound collection result sent from the sound collection unit 610 in the sound pressure measurement operation mode. Then, the control unit 110B sends the sound collection result to the wireless communication unit 320 as terminal transmission data. In addition, when a measurement condition setting input is made to the input unit 150 in the sound pressure measurement operation mode, the control unit 110B sends the set measurement condition to the wireless communication unit 320 as terminal transmission data.
- control unit 110B transmits the control information on the sound pressure level of the external output sound output from the external sound output unit 210 transmitted from the server device 400 in the sound pressure measurement operation mode to the network 500 and the wireless communication unit 320. Receive through. Then, the control unit 110B controls the signal level of the test sound signal according to the control information. Further, similarly to the control unit 110A described above, the control unit 110B controls the signal level of the external output signal in the sound pressure measurement operation mode and the normal operation mode.
- control unit 110B Details of processing executed by the control unit 110B will be described later.
- the storage unit 310 includes a nonvolatile storage device, similar to the storage unit 120 described above.
- the storage unit 310 can be accessed by the control unit 110B.
- the storage unit 310 is different from the storage unit 120 in that it does not store the speaker characteristic information SPD described above.
- the wireless communication unit 320 receives the terminal transmission data sent from the control unit 110B. Then, the wireless communication unit 320 transmits the terminal transmission data to the server device 400 via the network 500.
- the wireless communication unit 320 receives control information on the sound pressure level of the test sound transmitted from the server device 400 via the network 500. Then, the wireless communication unit 320 sends the control information and the like to the control unit 110B.
- FIG. 9 shows a schematic configuration of the server apparatus 400.
- the server apparatus 400 includes a control unit 110C, a storage unit 410 as the storage unit 825 in the second embodiment, and an external communication unit 420 as the reception unit 821 and the transmission unit 823. ing.
- the control unit 110C described above includes a central processing unit (CPU) and its peripheral circuits, and performs overall control of the server device 400 as a whole.
- Various functions as the server device 400 are realized by the control unit 110C executing various programs. These functions include the function as the generation unit 822 in the second embodiment described above.
- control unit 110C Details of processing executed by the control unit 110C will be described later.
- the storage unit 410 stores various information data used in the server device 400.
- the storage unit 410 can be accessed by the control unit 110C.
- the information data stored in the storage unit 410 includes the above-described speaker characteristic information SPD.
- the external communication unit 420 receives terminal transmission data transmitted from the terminal device 300 via the network 500. Then, the external communication unit 420 sends the terminal transmission data to the control unit 110C.
- the external communication unit 420 receives server transmission data such as control information sent from the control unit 110C. Then, the external communication unit 420 sends the server transmission data to the terminal device 300 via the network 500.
- the terminal transmission data output from the control unit 110B is transmitted to the control unit 110C via the wireless communication unit 320, the network 500, and the external communication unit 420. Will be.
- the server transmission data output from the control unit 110C is sent to the control unit 110B via the external communication unit 420, the network 500, and the wireless communication unit 320.
- each microphone of the sound collection unit 610 is disposed at a position outside the vehicle CR corresponding to the target directivity, and the sound collection is performed.
- the unit 610 is assumed to be connected to the control unit 110B of the terminal device 300.
- the control unit 110B sends the set measurement conditions to the control unit 110C of the server device 400.
- the control unit 110C that has received the measurement condition refers to the speaker characteristic information SPD in the storage unit 410, and similarly to the control unit 110A of the first embodiment described above, the control unit 110C has the frequency of the adjustment target frequency included in the measurement condition.
- the target sound pressure level in the sound collection unit 610 for each is determined.
- the control unit 110C sends control information specifying the first frequency to be measured and a predetermined gain value to the control unit 110B.
- the control unit 110B that has received this control information generates a test sound signal corresponding to the measurement target frequency and the gain value specified by the control information in the same manner as the control unit 110A. Then, the control unit 110B sends the generated test sound signal to the external sound output unit 210 as an external output sound signal. As a result, a test sound is output from the speaker SP of the external sound output unit 210.
- control unit 110B receives the sound collection result sent from the sound collection unit 610. Then, the control unit 110B sends the sound collection result to the control unit 110C.
- the control unit 110C that has received the sound collection result calculates an error between the sound pressure level at the sound collection position of the test sound and the target sound pressure level based on the sound collection result in the same manner as the control unit 110A described above. To do. Subsequently, the control unit 110C derives a gain value that is estimated to be small in error based on the calculated error and the current gain value. Then, the control unit 110C sends the gain correction designation to the derived gain value to the control unit 110B as control information.
- the control unit 110B that has received the control information including the gain correction designation starts generation of a test sound according to the gain correction designation, and then sends a report of the start of gain correction control to the control unit 110C.
- control unit 110B transmits the sound collection result from the sound collection unit 610 to the control unit 110C, gain correction control based on the control information sent from the control unit 110C, and starts the gain correction control to the control unit 110C. Repeat the report. Further, after receiving the report of the start of the gain correction control sent from the control unit 110B, the control unit 110C calculates an error newly calculated based on the sound collection result sent from the control unit 110B in the previous time. The error calculation is repeated until the error is equal to or greater than the specified error.
- the control unit 110C sets the gain value obtained from the previously calculated error to the adjustment value corresponding to the current frequency to be measured. To decide. Then, the control unit 110C sends an individual measurement end notification including a pair of the current measurement target frequency and the determined adjustment value to the control unit 110B.
- the control unit 110B that has received the individual measurement end notification uses the determined gain value as an adjustment value corresponding to the current measurement target frequency in the storage unit 310 in the same manner as the control unit 110A described above. Are registered in the sound pressure adjustment table TBL.
- control unit 110B and the control unit 110C repeat the same processing as described above until the adjustment values corresponding to the respective adjustment target frequencies set in the measurement conditions are determined. Then, after sending individual measurement end notifications for all adjustment target frequencies set in the measurement conditions, the control unit 110C sends measurement end notifications to the control unit 110B.
- the adjustment value of the signal level of the external output sound signal is determined in accordance with the measurement condition set by the user, and is registered in the sound pressure adjustment table TBL in the storage unit 310.
- the control unit 110B sets the individual table to be referred to that is specified most recently by the user in the same manner as the control unit 110A described above. Refer to the set individual table. Then, the control unit 110B performs control on the external output signal so that the adjustment value corresponding to the adjustment target frequency registered in the referenced individual table is the gain value of the component of the adjustment target frequency. As a result, an external output sound in which the output volume is minimized while satisfying the necessary sound pressure level specified by the user is output from the external sound output unit 210.
- the control of the terminal device 300 is performed based on the sound collection result by the sound collection unit 610 of the test sound output to the outside of the vehicle CR.
- the unit 110B and the control unit 110C of the server device 400 cooperate to control the signal level of the test sound signal.
- an adjustment value of the signal level of the test sound signal that can minimize the output volume of the external output sound propagating in the outside space while satisfying the necessary sound pressure level condition is obtained.
- the obtained adjustment value is registered in the sound pressure adjustment table in the storage unit 310.
- the gain value obtained from the previously calculated error is adjusted.
- the value is registered in the sound pressure adjustment table TBL.
- the gain value at that time may be registered in the sound pressure adjustment table TBL as an adjustment value.
- a test sound is output for each frequency to be adjusted, and a corresponding adjustment value is determined for each frequency to be adjusted.
- a sound based on the sound data corresponding to the external output sound in the normal operation mode is output as a test sound, and a frequency analysis of the sound collection result is performed, and each adjustment target frequency is supported.
- the adjustment value may be determined.
- one sound collection unit 610 is used, and the sound pressure level is measured without changing the position of the sound collection unit 610.
- the sound collection unit 610 is in each time the sound pressure level at one distance is measured. You may make it change the position of a microphone to the position designated by the measurement conditions.
- the target sound pressure level determination process can be omitted.
- the storage unit of the navigation device stores the sound source data.
- the sharable storage unit may be used as a storage unit for storing sound source data.
- the sound source data can be omitted as information stored in the storage unit of the navigation device.
- control unit of the navigation device generates an external output sound signal.
- the external sound output unit may generate an external output sound signal.
- the storage unit of the terminal device stores the sound source data.
- the sharable storage unit may be used as a storage unit for storing sound source data.
- the sound source data can be omitted as information stored in the storage unit of the terminal device.
- the terminal device 300 includes the sound output unit 130, the display unit 140, and the GPS receiving unit 160.
- the terminal device may perform only the processing related to the external output sound, and the sound output unit 130, the display unit 140, and the GPS receiving unit 160 may be omitted as components of the terminal device.
- the server device holds the speaker characteristic information.
- speaker characteristic information may be transmitted from the terminal device to the server device each time a measurement condition is generated.
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Abstract
Description
[第1実施形態]
まず、本発明の第1実施形態を、図1を参照して説明する。
図1には、第1実施形態に係る音響装置700の概略的な構成が示されている。この音響装置700は、電気エネルギを駆動エネルギの一部又は全部として利用する車両CRに搭載される。
次に、上記のように構成された音響装置700の動作について説明する。
まず、利用者による入力部720に対する操作により、音圧測定動作モードが指定された場合の動作について説明する。なお、利用者の入力部720に対する操作による目標音圧の設定に先立って、収音部950を構成するマイクロフォンのそれぞれは、当該目標音圧に対応する車両CRの外部の位置に配置されるとともに、収音部950は、音響装置700の取得部730と接続されるものとする。
次に、利用者による入力部720に対する操作により、通常動作モードが指定された場合の動作について説明する。なお、通常動作モード時には、収音部950は、音響装置700の取得部730と接続されない。また、通常動作モード時であり、かつ、車両CRの走行時には、外部音出力部910からは、車両CRの接近に対する注意を喚起するための外部出力音が出力されるものとする。
まず、本発明の第2実施形態を、図2を参照して説明する。
図2には、第2実施形態に係る端末装置810及び出力音管理装置820の概略的な構成が示されている。この図2に示されるように、端末装置810は、車両CR内に設置されて動作するようになっている。また、出力音管理装置820は、車両CRの外に配置される。そして、端末装置810と出力音管理装置820とは、ネットワーク850を介して、通信可能となっている。
端末装置810は、上述した第1実施形態の音響装置700と比べて、制御部740Aに代えて制御部740Bを備える点、送信部811及び受信部812を備えている点、並びに、記憶部710に代えて記憶部815を備える点が異なっている。以下、この相違点の主に着目して説明する。
図2に示されるように、出力音管理装置820は、受信部821と、生成部822と、送信部823と、記憶部825とを備えている。
次に、上記のように構成された端末装置810と出力音管理装置820とが協働して実行する外部出力音の音圧の制御処理について説明する。
まず、利用者による端末装置810の入力部720に対する操作により、音圧測定動作モードが指定された場合の動作について説明する。なお、利用者の入力部720に対する操作による測定条件の設定に先立って、収音部950のマイクロフォンのそれぞれは、当該目標音圧に対応する車両CRの外部の位置に配置されるとともに、収音部950は、端末装置810の取得部730と接続されるものとする。
次に、利用者による入力部720に対する操作により、通常動作モードが指定された場合の動作について説明する。なお、通常動作モード時には、収音部950は、端末装置810の取得部730と接続されていない。また、通常動作モード時であり、かつ、車両CRの走行時には、外部音出力部910からは、車両CRの接近に対する注意を喚起するための外部出力音が出力されるものとする。
[実施形態の変形]
上記の第1及び第2実施形態は、様々な変形が可能である。
まず、本発明の第1実施例を、図3~図6を参照して説明する。
次に、上記のように構成されたナビゲーション装置100の動作について、制御ユニット110Aが実行する外部出力音の音圧レベルの制御処理に主に着目して説明する。
まず、利用者による入力ユニット150に対する操作により、音圧測定動作モードが指定された場合の動作について説明する。なお、利用者の入力ユニット150に対する操作による測定条件の設定に先立って、収音ユニット610を構成するマイクロフォンが、車両CRの外部の位置に配置されるとともに、収音ユニット610は、ナビゲーション装置100の制御ユニット110Aと接続されるものとする。
次に、ステップS14における音圧レベルの測定処理について説明する。
次に、利用者による入力ユニット150に対する操作により、通常動作モードが指定された場合の動作について説明する。なお、通常動作モード時には、収音ユニット610は、制御ユニット110Aと接続されない。また、通常動作モード時であり、かつ、車両CRの走行時には、外部音出力ユニット210からは、車両CRの接近に対する注意を喚起するための外部出力音が出力されるものとする。
次に、本発明の第2実施例を、図7~図9を参照して説明する。この第2実施例は、上述した第2実施形態(図2参照)の一態様となっている。
図7には、第2実施例に係る端末装置300、及び、サーバ装置400の配置位置の関係が示されている。なお、端末装置300は、第2実施形態における端末装置810の一態様であり、サーバ装置400は、第2実施形態における出力音管理装置820の一態様である。
図8には、端末装置300の概略的な構成が示されている。この図8に示されるように、端末装置300は、上述した第1実施例のナビゲーション装置100と比べて、制御ユニット110Aに代えて制御ユニット110Bを備える点、記憶ユニット120に代えて、記憶部815としての記憶ユニット310を備える点が異なっている。また、端末装置300は、第1実施例のナビゲーション装置100と比べて、センサユニット160を備えていない点、送信部811及び受信部812としての無線通信ユニット320を更に備える点が異なっている。以下、これらの相違点に主に着目して説明する。
図9には、サーバ装置400の概略的な構成が示されている。この図9に示されるように、サーバ装置400は、制御ユニット110Cと、第2実施形態における記憶部825としての記憶ユニット410と、受信部821及び送信部823としての外部通信ユニット420とを備えている。
次に、上記のように構成された端末装置300とサーバ装置400とが協働して実行する外部出力音の指向性の制御処理について説明する。
まず、利用者による端末装置300の入力ユニット150に対する操作により、音圧測定動作モードが指定された場合の動作について説明する。なお、利用者による入力ユニット150に対する操作による測定条件の設定に先立って、収音ユニット610のマイクロフォンのそれぞれは、当該目標指向性に対応する車両CRの外部の位置に配置されるとともに、収音ユニット610は、端末装置300の制御ユニット110Bと接続されるものとする。
次に、利用者による入力ユニット150に対する操作により、通常動作モードが指定された場合の動作について説明する。なお、通常動作モード時には、収音ユニット610は、端末装置300の制御ユニット110Bと接続されない。また、通常動作モード時であり、かつ、車両CRの走行時には、外部音出力ユニット210からは、車両CRの接近に対する注意を喚起するための外部出力音が出力されるものとする。
上記の第1及び第2実施例は、様々な変形が可能である。
Claims (10)
- 車両の外部に向けて音を出力する外部音出力部に、外部出力音信号を供給する音響装置であって、
前記車両の外部の所定位置に配置された収音部により収音された前記外部音出力部により出力される音の音圧レベルを取得する第1取得部と;
前記第1取得部により取得された音圧レベルと、前記所定位置における目標音圧レベルとに基づいて、前記外部出力音信号の信号レベルを制御する制御部と;
を備えることを特徴とする音響装置。 - 前記制御部は、前記第1取得部により取得された音圧レベルが、前記目標音圧レベルに近づくように、前記外部出力音信号の信号レベルを制御する、ことを特徴とする請求項1に記載の音響装置。
- 前記目標音圧レベルは、予め定められた周波数毎に定められ、
前記第1取得部は、前記外部音出力部により出力される音の前記予め定められた周波数毎の音圧レベルを取得し、
前記制御部は、前記予め定められた周波数毎に、前記外部出力音信号の信号レベルを制御する、
ことを特徴とする請求項1又は2に記載の音響装置。 - 前記目標音圧レベルの指定を取得し、前記指定された目標音圧レベルを前記制御部へ送る第2取得部を更に備える、ことを特徴とする請求項1~3のいずれか一項に記載の音響装置。
- 車両の外部に向けて音を出力する外部音出力部に、外部出力音信号を供給する音響装置であって、
前記車両の外部の所定位置に配置された収音部により収音された前記外部音出力部により出力される音の音圧レベルを取得する取得部と;
前記音圧レベルが、前記所定位置において設定された音圧レベルに近づくように、前記外部出力音信号の信号レベルを制御する制御部と;
を備えることを特徴とする音響装置。 - 車両に設置された外部音出力部により出力され、前記車両の外部の所定位置に配置された収音部により収音された音の音圧レベルを受信する受信部と;
前記受信部による受信結果と、前記所定位置における目標音圧レベルとに基づいて、前記外部出力音信号の信号レベルの制御情報を生成する生成部と;
前記生成部による生成結果を送信する送信部と;
を備えることを特徴とする出力音管理装置。 - 車両内に配置される端末装置であって、
前記車両に設置された外部音出力部により出力され、前記車両の外部の所定位置に配置された収音部により収音された音の音圧レベルを取得する音圧レベル取得部と;
前記音圧レベル取得部による取得結果を送信する送信部と;
前記音圧レベル取得部による取得結果と、前記所定位置における目標音圧レベルとに基づいて生成された、外部出力音信号の信号レベルの制御情報を受信する受信部と;
前記受信部による受信結果に基づいて、前記外部出力音信号の信号レベルを制御する制御部と;
を備えることを特徴とする端末装置。 - 車両の外部に向けて音を出力する外部音出力部への外部出力音信号を制御する出力音制御方法であって、
前記外部音出力部により出力され、前記車両の外部の所定位置に配置された収音部により収音された音の音圧レベルを取得する取得工程と;
前記取得工程における取得結果と、前記所定位置における目標音圧レベルとに基づいて、前記外部出力音信号の信号レベルを制御する制御工程と;
を備えることを特徴とする出力音制御方法。 - 請求項8に記載の出力音制御方法を演算部に実行させる、ことを特徴とする出力音制御プログラム。
- 請求項9に記載の出力音制御プログラムが、演算部により読み取り可能に記録されている、ことを特徴とする記録媒体。
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JP2014507154A JP5728129B2 (ja) | 2012-03-28 | 2012-03-28 | 音響装置、出力音管理装置、端末装置及び出力音制御方法 |
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JP2020147138A (ja) * | 2019-03-13 | 2020-09-17 | アンデン株式会社 | 車両接近通報装置の補正装置および補正方法 |
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JP2011207389A (ja) * | 2010-03-30 | 2011-10-20 | Mazda Motor Corp | 車両用発音装置 |
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JP2020147138A (ja) * | 2019-03-13 | 2020-09-17 | アンデン株式会社 | 車両接近通報装置の補正装置および補正方法 |
JP7040483B2 (ja) | 2019-03-13 | 2022-03-23 | 株式会社デンソーエレクトロニクス | 車両接近通報装置の補正装置および補正方法 |
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