Acoustic control device for vehicles and acoustic control method for vehicles

Abstract

To provide an acoustic control device for vehicles capable of suppressing sound leakage to the outside of a vehicle and reducing deterioration of an audio environment in the vehicle in a state where a door of the vehicle is opened.SOLUTION: An acoustic control device 10 for vehicles comprises an open state acquisition section 110 and an acoustic control section 111. The open state acquisition section 110 acquires an opening degree of each of a plurality of doors provided in a vehicle. When it is determined any one of the plurality of doors is opened from the opening degree acquired by the open state acquisition section 110, in accordance with an opening degree of a first door that is the opened door, the acoustic control section 111 performs control for adjusting a sound volume of a first speaker installed correspondingly to the first door and reducing a sound volume of a woofer which is different from the first speaker and installed in the vehicle.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an acoustic control device for a vehicle and an acoustic control method for a vehicle. [Background technology]

[0002] In Patent Document 1, a part of a plurality of opening and closing bodies such as doors or windows of a vehicle is in an open state. In order to suppress sound leakage to the outside of the vehicle, the speaker corresponding to the open / close body that is in the open state is turned on. A vehicle audio control device is described that mutes a speaker. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-29765 Summary of the Invention [Problem to be solved by the invention]

[0004] The vehicle acoustic control device described in Patent Document 1 detects an open door or window. The speakers near the window are muted to suppress sound leakage, The audio environment inside the vehicle for passengers to listen to music deteriorates.

[0005] The present invention suppresses sound leakage to the outside of a vehicle when the vehicle door is open, Vehicle acoustic control device and vehicle acoustic control device capable of reducing deterioration of the audio environment inside the vehicle The present invention aims to provide a method for controlling [Means for solving the problem]

[0006] The present invention includes an open state acquisition unit that acquires an open state of each of a plurality of doors of a vehicle; Depending on the degree of opening acquired by the open state acquisition unit, one of the multiple doors is opened. When it is determined that the door has been opened, the first door installed corresponding to the first door, which is the opened door, The volume setting value of the speaker is set based on the volume setting value before the first door is opened. The volume of the first speaker is reduced according to the degree to which the first door is open. In response to the opening, the volume of a woofer installed in the vehicle, which is different from the first speaker, is reduced. The present invention provides a vehicle acoustic control device equipped with an acoustic control unit that performs control.

[0007] The present invention obtains the degree of opening of each of a plurality of doors of a vehicle, and displays the obtained degree of opening of each of the doors. When it is determined that any one of the plurality of doors is opened by The volume setting value of the first speaker installed corresponding to the first door is set to the volume setting value of the first door. The volume setting before the first door is opened is used as a reference, and the volume setting is changed according to the degree to which the first door is opened. A control for reducing the volume setting of a first speaker and a control for reducing the volume setting of the first speaker in response to the opening of a first door. A vehicle acoustic control method for controlling a woofer installed in a vehicle to reduce the volume of the woofer, which is different from the above. Provide the law. Effect of the Invention

[0008] According to the vehicle acoustic device and the vehicle acoustic control method of the present invention, When this happens, it is important to suppress sound leakage outside the vehicle and prevent the audio environment inside the vehicle from deteriorating. This can reduce the [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a vehicle acoustic control device according to a first embodiment of the present invention. [Figure 2A] FIG. 2A is a diagram for explaining an example of a sound control method. [Figure 2B] FIG. 2B is a diagram for explaining an example of the sound control method. [Figure 2C] FIG. 2C is a diagram for explaining an example of a sound control method. [Diagram 3] FIG. 3 is a graph showing an example of the amount of sound leakage observed when the left front door of a vehicle is in an open state. [Figure 4] FIG. 4 is a graph showing an example of the amount of sound leakage observed when the left rear door of a vehicle is in an open state. [Diagram 5] FIG. 5 is a flowchart illustrating an example of the operation of the vehicle acoustic control device 10 according to the first embodiment of the present invention. [Figure 6] FIG. 6 is a diagram showing an example of an arrangement of multi-channel speakers in a vehicle equipped with a vehicle acoustic control device according to the second embodiment of the present invention. [Figure 7] FIG. 7 is a diagram showing an example of the names of the speakers in FIG. [Figure 8] FIG. 8 is a flowchart showing an example of the operation of the vehicle acoustic control device 10 according to the third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the vehicle acoustic control device of each embodiment will be described with reference to the accompanying drawings. In the description, the same parts are given the same reference numerals and the description will be omitted.

[0011] [First embodiment] [Configuration of vehicle acoustic control device] Referring to FIG. 1, a configuration example of a vehicle acoustic control device according to a first embodiment and its peripheral devices will be described. The vehicle acoustic control device 10 according to the first embodiment is mounted on a vehicle. As shown in FIG. 1, a vehicle acoustic control device 10 includes a vehicle ECU (Electronic Control Unit). A control unit 30 and a plurality of speakers 21, 22, 23 and and 24 are connected to an audio source 50.

[0012] The vehicle acoustic control device 10 detects a plurality of doors provided in the vehicle by a door sensor 40. The information on the degree of opening of each door of the vehicle is acquired from the vehicle ECU 30, and the degree of opening is determined based on the acquired information. When it is determined that any one of the plurality of doors is open, the vehicle that has been opened Depending on the degree to which the door is opened, the sound from the speaker installed in the vehicle corresponding to the open door is Control is performed to adjust the amount.

[0013] The door sensor 40 is a sensor that detects the degree of opening of each of a plurality of doors provided in a vehicle. Although not shown in the figure, they are installed in appropriate locations on each door. The degree is the degree to which the door on which the door sensor 40 is installed is opened with respect to the full opening of the door. If the degree of opening is 0, the door is closed. The door sensor 40 is, for example, a left front door, a right front door, a left rear door, They are installed in the front door, right rear door, and back door.

[0014] The door sensor 40 is installed, for example, at a door hinge portion, and is a bar that becomes uneven depending on whether the door is opened or closed. The degree of opening of the vehicle door is determined based on the position of the bar sensor when the door is opened. The door sensor 40 also has a camera that captures an image of the door hinge. For example, the distance of the red line of the door hinge part colored red can be measured from the image taken when the door is opened. The degree to which the door is opened may be detected by calculating the distance.

[0015] The door sensor 40 detects when the door stopper of the vehicle is at a predetermined position, such as when the door is half-open or fully-open. If the door stopper has a function to fix the door in a certain position, the door stopper is equipped with a sensor installed at each specified position. The door is opened to a predetermined position of the door stopper, and the door is opened from the sensor signal. The degree of opening of the door may be detected.

[0016] The door sensor 40 is connected to the vehicle ECU 30 and detects the degree of opening of each door. The vehicle ECU 30 is mounted on the vehicle and receives an input from a door sensor 40. The information on the degree of opening of each door inputted is outputted to the vehicle acoustic control device 10. The type and number of the sensors 40 are not particularly limited, and the degree of opening of each door can be measured by a plurality of types of door sensors. In addition, when the vehicle has a sliding door, In the case where the vehicle is equipped with an opening and closing device for automatically opening and closing the doors, the door sensor 40 is not used. Additionally, the degree to which the door is opened may be detected from an opening / closing device.

[0017] The plurality of speakers 21 to 24 are installed in the vehicle and output sound to the vehicle. The speakers 21 to 24 convert the analog audio signals input thereto into audio. Although not shown, the speaker 21 is a speaker installed in the left front door of the vehicle. Speaker 22 is a speaker installed in the right front door, and speaker 23 is installed in the left rear door. The speaker 21 is a speaker placed in the right rear door, and the speaker 24 is a speaker placed in the right rear door.

[0018] The speakers 21 to 24 may be full-range speakers or separate speakers. If each speaker is a separate speaker, it mainly produces high-frequency sounds. In vehicles, the speaker may include a tweeter that outputs high-pitched sounds and a woofer that outputs low-pitched sounds. The tweeter is installed on the dashboard and the woofer is installed under the door. The number and arrangement of multiple speakers may vary. The location is not particularly limited.

[0019] The vehicle acoustic control device 10 includes a controller 11 and an audio DSP (Digital Signal Processor). Digital Signal Processor) 12 (hereafter abbreviated as DSP12) and A digital to analog converter 13 (hereinafter abbreviated as DAC 13), a volume controller 14, and an amplifier 1 The vehicle acoustic control device 10 is equipped with a computer. The system is composed of only a DSP 12, a DAC 13, a volume controller 14, and an AM The P15 may be configured as a separate device different from the vehicle acoustic control device 10.

[0020] The controller 11 includes a CPU (Central Processing Unit), The controller 11 is a general-purpose computer equipped with a memory, a storage device, an input / output unit, etc. The vehicle ECU 30 acquires information on the degree of opening of each of a plurality of doors of the vehicle. The controller 11 controls the DSP 12 and the volume controller 14 to control the volume of the speakers installed in the vehicle. It instructs the speaker 21 to 24 to control the audio data input to the speaker 21 to 24. Specifically, the CPU loads various programs stored in the storage device into memory and executes the programs included in the In this way, the controller 11 executes various commands provided in the vehicle acoustic control device 10. The controller 11 functions as a plurality of information processing circuits. The controller 11 includes an open state acquisition unit 110 and an audio control unit 111. It may be realized by a system-on-a-chip (SoC).

[0021] The open state acquisition unit 110 acquires the open state of each of the doors of the vehicle from the vehicle ECU 30. The open state acquisition unit 110 acquires information on the degree of openness. The system then determines whether each door is open or not. The door that is determined to be open is classified as the first door. This will be referred to as the "

[0022] The audio control unit 111 identifies the first door that is determined to be open by the open state acquisition unit 110. The acoustic control unit 111 selects the first driver among the speakers 21 to 24 installed in the vehicle. Specifically, the speaker that is installed in correspondence with the sound source (hereinafter, the first speaker) is identified. The sound control unit 111 stores information about the speaker associated with the first door in a storage unit (not shown). to identify the first speaker.

[0023] The first speaker is the speaker that has the greatest effect on sound leakage to the outside when the door is open. The speaker is, for example, a speaker installed on the first door. If no speaker is installed in the first door, the first speaker is installed closest to the first door. The first door may be a left front door or a right front door. In this case, the first speaker may be a speaker installed in the A-pillar of the vehicle. If the first door is a left rear door or a right rear door, the first speaker is The speaker may be a speaker installed in the B-pillar of the vehicle.

[0024] The sound control unit 111 receives the degree of opening of the first door acquired by the open state acquisition unit 110. According to the above, a volume control unit is configured to reduce the volume of the first speaker installed corresponding to the first door. Specifically, the audio control unit 111 instructs the adjuster 14 to The volume setting is used as a reference and the ratio at which the volume setting is reduced is changed according to the degree to which the door is opened. The acoustic control unit 111 adjusts the volume of the first speaker to a larger extent as the door is opened. Instructs the volume control 14 to reduce the volume.

[0025] In addition, the audio control unit 111 detects the opening state of the first door acquired by the opening state acquisition unit 110. When the degree of opening is equal to or greater than a predetermined opening degree set in advance, the first speed The audio control unit 111 may instruct the volume controller 14 to mute the volume of the speaker. Depending on the degree to which the first door is opened, the door opposite the first door (hereinafter referred to as the second door) ) to reduce the volume of the speaker (hereinafter referred to as the second speaker) installed in response to the In this case, the acoustic control unit 111 may instruct the adjuster 14 to select one of the multiple speakers. A second speaker installed corresponding to the second door is further specified. The control unit 111 is associated with the first door and a speaker installed corresponding to the second door. The information is obtained from the storage unit to identify the second speaker.

[0026] In addition, the second speaker affects sound leakage to the outside when the door is open. The first speaker is different from the first speaker, for example, a speaker installed in the second door. The sound control unit 111 detects whether the first door is opened beyond a preset degree of opening. When the opening degree of the first door is above, the volume of the first speaker is muted and the opening degree of the first door is Depending on the degree of the sound emitted, the volume controller 14 is instructed to reduce the volume of the second speaker. If the second door does not have a speaker, the second speaker should be installed in the first door. The second speaker may be the speaker closest to the A-pillar. Alternatively, the speaker may be a speaker installed in the vehicle interior or in the B-pillar.

[0027] The DSP 12 receives, for example, a four-channel audio signal from an audio source 50 that is a source of audio signals. An audio signal is input. The DSP 12 controls each channel based on an instruction from the audio control unit 111. Digital audio data of the four-channel audio signal to be supplied to the speakers corresponding to the four channels to the DAC 13. As will be described later, the DSP 12 controls the speakers 21 to 24 individually. In the case of a controllable separate speaker, the speaker is controlled based on an instruction from the acoustic control unit 111. The audio data for each speaker channel can be switched from 4-channel output to mono output. It can be replaced.

[0028] When the audio signal input to DSP12 is a two-channel audio signal, 2: The left channel audio signal is sent to the speakers installed in the left front door and left rear door. The right channel audio signal is sent to the speakers installed in the right front door and right rear door. The remaining 100,000 units are supplied to the

[0029] The DAC 13 converts the supplied digital audio data into an analog audio signal. The analog audio signal converted by the AC 13 is input to a volume controller 14 .

[0030] The volume controller 14 outputs from each speaker based on an instruction from the audio control unit 111. Adjusts the sound output level, i.e., the volume. The volume is adjusted by the volume adjuster 14. The audio signal of the log is input to the AMP 15.

[0031] The AMP 15 amplifies the analog audio signal input thereto and outputs the amplified audio signal to each of the speakers 21 to 24. Supply to.

[0032] [Sound control method] 2A to 2C, an example of an acoustic control method of the vehicle acoustic control device 10 shown in FIG. In the following description, the preset door opening degree is the door fully open. Let's say it's half as open as that.

[0033] FIG. 2A shows a state in which the left front door FDL of the vehicle is opened and the degree of opening of the left front door FDL is In FIG. 2A, the door is less than halfway open. The acoustic control unit 110 determines that the left front door FDL is opened. The left front speaker 21 is identified. The acoustic control unit 111 determines the degree of opening of the left front door FDL. The sound control unit 1 determines that the door is less than halfway open compared to the full open state. 11 reduces the volume of the speaker 21 by a predetermined amount depending on the degree to which the left front door FDL is opened. The audio control unit 111 also instructs the volume adjuster 14 to adjust the volume of the speaker 21. When the degree of opening of the left front door FDL decreases after reducing the predetermined amount, The volume of the speaker 21 is increased by a predetermined amount according to the decrease in the degree of opening of the front door FDL. The user may instruct the volume controller 14 to do so.

[0034] FIG. 2B shows a state in which the left front door FDL of the vehicle is opened and the degree of opening of the left front door FDL is In FIG. 2B, the door is more than halfway open. The acoustic control unit 110 determines that the left front door FDL is opened. The left front speaker 21 is identified. The acoustic control unit 111 determines the degree of opening of the left front door FDL. When the door is judged to be more than halfway open, the vehicle's right front spins up. The audio control unit 111 further specifies the speaker 22. The audio control unit 111 mutes the volume of the speaker 21 and The volume of the speaker 22 is reduced by a predetermined amount depending on the degree to which the front door FDL is opened. The sound control unit 111 controls the opening degree of the left front door FDL. When the volume is fully open, the volume of the speaker 21 is muted and the volume of the speaker 22 is increased. The audio control unit 111 may instruct the volume controller 14 to mute the speaker. After muting the volume of speakers 21 and 22, the degree of opening of the left front door FDL decreases. In this case, the volume of the speaker 21 is increased in accordance with the decrease in the degree of opening of the left front door FDL. The user may instruct the volume control 14 to turn the volume control off.

[0035] FIG. 2C shows a state in which the back door BD of the vehicle is open. In FIG. 2C, The acquisition unit 110 determines that the back door BD of the vehicle is opened. The speaker 23 at the left rear of the vehicle and the speaker 24 at the right rear of the vehicle are identified. 11 reduces the volume of the speakers 23 and 24 by a predetermined amount depending on the degree to which the back door BD is opened. The audio control unit 111 also instructs the volume controller 14 to reduce the volume of the speaker 23 and If the degree of opening of the back door BD decreases after the volume of 24 is reduced by a specified amount, According to the decrease in the degree of opening of the door BD, the volume of the speakers 23 and 24 is increased by a predetermined amount. The user may instruct the volume controller 14 to adjust the volume.

[0036] FIG. 3 shows a state 1 in which all doors of a vehicle equipped with the vehicle acoustic control device 10 are closed. In state 2, the left front door FDL is open. In state 2, the speaker 21 (the first speaker In state 3, the speaker 21 and the speaker 22 (second speaker) are muted. The amount of sound leakage to the outside of the vehicle for each frequency band in the state 4 where both the Here is an example of the observed results. In this case, in state 1 where all the doors are closed, The amount of sound leakage from the left front door FDL is reduced, and the sound leakage from the left front door FDL is the most external sound leakage from the vehicle in the open state 2. The amount of sound leakage to the

[0037] In state 3, where the speaker 21 is muted, the noise level is reduced by about 10d in the entire frequency range compared to state 2. The amount of sound leakage is reduced by about b. By reducing (muting) the volume of the first speaker, the amount of sound leaking outside the vehicle is reduced. In addition, in state 4 where the speaker 22 is muted, the mid-high range is about 5 to 7 times lower than in state 3. The amount of sound leakage is reduced by about 10 dB. The volume of the first speaker located opposite the first door is muted, and the volume of the second door speaker located opposite the first door is muted. Muting the volume of the second speaker installed in response to the sound will reduce the amount of sound leaking outside the vehicle. is suppressed.

[0038] FIG. 4 shows a state in which all the doors of a vehicle equipped with the vehicle acoustic control device 10 are closed. In state 1, the left rear door RDL is open, and in state 5, the speaker 23 (the first speaker In state 6, the speaker 23 and the speaker 24 (second speaker) are muted. In state 5, the speaker 23 and the speaker 24 (second speaker) are muted. The amount of sound leakage to the outside of the vehicle for each frequency band when both the headphone amplifier and the speaker are muted 7 As shown in Figure 4, when the left rear door RDL is opened, , reduce (mute) the volume of the first speaker installed corresponding to the first door that is opened. This reduces the amount of sound leakage to the outside of the vehicle. The volume of the first speaker located opposite the first door is muted, and the volume of the second speaker located opposite the first door is muted. Muting the volume of the second speaker installed in response to the vehicle reduces the amount of sound leaking outside the vehicle. is further suppressed.

[0039] [Procedure for acoustic control processing] Next, referring to the flowchart shown in FIG. 5, the vehicle acoustic control device according to the first embodiment will be described. An example of the procedure of the sound control process by 10 will be described.

[0040] The vehicle acoustic control device 10 is configured to operate in a manner similar to that described above when the vehicle acoustic control device 10 is powered on and the controller When the controller 11 starts its operation, the process of FIG. 5 is started.

[0041] First, in step S101, the open state acquisition unit 110 acquires the vehicle The process starts with step S102, which acquires information on the degree of opening of each of the multiple doors equipped in the vehicle. The open state acquisition unit 110 determines whether each door is open based on the acquired information on the degree of opening. If any of the doors is opened (step S1 If the answer is YES in step S102, the process proceeds to step S103. If not (NO in step S102), the process proceeds to step S112.

[0042] In step S103, the audio control unit 111 identifies the first door that is opened. The acoustic control unit 111 selects a first speaker from among the plurality of speakers, the first speaker being installed corresponding to the first door. Specifically, the audio control unit 111 identifies the speaker of the first door stored in the storage unit. The information of the speaker associated with the first speaker is acquired to identify the first speaker.

[0043] The process proceeds to step S104, where the acoustic control unit 111 receives the open state information from the open state acquisition unit 110. The degree of opening of the first door obtained is equal to or greater than a predetermined degree of opening. For example, the acoustic control unit 111 determines whether the degree of opening of the first door is Whether the first door is more than halfway open compared to the full opening of the second door, i.e., the degree of opening of the first door is Determine whether the door is open 50% or more compared to the full opening. First door opening degree However, if the door is open by 50% or more with respect to the full opening (YES in step S104), ), the process proceeds to step S106. If the degree of opening is less than 50% (NO in step S104), the process proceed to step S105.

[0044] In step S105, the acoustic control unit 111 performs the following in response to the degree to which the first door is opened: Instruct the volume controller 14 to reduce the volume of the first speaker. 111 is when the first door is opened 25% of the full opening. The volume setting value of the first speaker is changed relative to the volume setting value before the first door is opened. The audio control unit 111 instructs the volume controller 14 to reduce the volume by half or more. If the volume setting of the first speaker was 11 before the first door was opened, The volume control 14 is then instructed to change the speaker volume setting to 5. Proceed to step S109.

[0045] In step S106, the audio control unit 111 detects the second door located opposite the first door. The second speaker installed corresponding to the door is further specified. 11 is a door sensor that is stored in a memory unit and is associated with a first door and is installed in association with a second door. The information of the selected speaker is obtained to identify the second speaker.

[0046] The process proceeds to step S107, where the audio control unit 111 mutes the volume of the first speaker. For example, the audio control unit 111 instructs the volume controller 14 to open the first door. When the door is 50% open, the volume of the first speaker is Specifically, the audio control unit 111 instructs the volume controller 14 to mute the first If the volume setting of the first speaker was 11 before the door was opened, The volume control 14 is instructed to change the volume setting of the mouse to 0.

[0047] The process proceeds to step S108, where the acoustic control unit 111 performs the following in response to the degree to which the first door is opened: , and instructs the volume controller 14 to reduce the volume of the second speaker. The control unit 111 is configured to open the first door 75% of the full opening of the door. In this case, the volume setting of the second speaker is adjusted to the volume setting before the first door is opened. Specifically, the audio control unit 111 instructs the volume controller 14 to reduce the volume by half or more. If the volume setting of the second speaker was 11 before the first door was opened, The volume control 14 is instructed to change the volume setting value of the speaker of the The portion 111 indicates that the first door is fully opened, i.e., 100% open. When the first door is fully open, the volume of the second speaker is muted. Specifically, the audio control unit 111 instructs the volume controller 14 to turn on the volume control unit 14 when the first door is opened. If the previous volume setting of the second speaker was 11, change the volume setting of the second speaker to 0. Then, the process proceeds to step S109.

[0048] In step S109, the open state acquisition unit 110 acquires the first door from the vehicle ECU 30. The process proceeds to step S110, where the open state acquisition unit 11 acquires information on the degree of openness of the door. 0: Whether the first door is closed or not based on the acquired information on the degree of opening of the first door If the first door is closed (YES in step S110), the process proceeds to step S110. On the other hand, if the first door is not closed (step S110: If NO, the process proceeds to step S112.

[0049] In step S111, the audio control unit 111 controls the volume of the first and second speakers. In other words, the audio control unit 111 instructs the volume controller 14 to return the volume to the normal volume. The first and second signals reduced or muted in steps S105, S107, and S108 Adjust the volume of the speaker in the second row to return it to the volume setting before the first door was opened. Specifically, the audio control unit 111 instructs the audio adjuster 14 to open the first door before the first door is opened. If the volume setting value of the first and second speakers is 11, the volume of the first and second speakers The volume controller 14 is instructed to set the value to 11. Then, the process proceeds to step S112. move on.

[0050] In step S112, the controller 11 detects that the vehicle acoustic control device 10 is powered off. If the power supply of the vehicle acoustic control device 10 is not off, i.e., if the power supply of the vehicle acoustic control device 10 is off, If the power supply of the acoustic control device 10 is on (NO in step S112), the process proceeds to step Return to S101. On the other hand, if the power supply of the vehicle acoustic control device 10 is off (step S112 If the answer is YES, the process of FIG. 5 is terminated.

[0051] [Effects of the first embodiment] As described above, the vehicle acoustic control device according to the present embodiment is configured to an open state acquisition unit that acquires the degree of opening of each door of the door A; When it is determined that any one of the plurality of doors is opened based on the result of the comparison, the opening According to the degree of opening of the first door, which is the door that is set up, the second door installed corresponding to the first door is activated. and an audio control unit that controls the adjustment of the volume of the speaker.

[0052] As a result, when the vehicle door is open, depending on the degree to which the vehicle door is open, The volume of the speaker installed in correspondence with the open vehicle door can be reduced. In other words, the volume of the speaker corresponding to the open vehicle door is suddenly muted. Instead of constantly raising the volume, the speaker volume can be gradually reduced depending on how far the door is opened. This reduces sound leakage to the outside of the vehicle and prevents the audio environment inside the vehicle from deteriorating. This can reduce the number of times that

[0053] In addition, the acoustic control unit of the vehicle acoustic control device according to this embodiment is configured to acquire the open state by the open state acquisition unit. The degree of opening of the first door obtained is equal to or greater than a preset degree of opening. In this case, the volume of the first speaker is muted, and the volume of the first speaker is increased depending on the degree to which the first door is opened. Adjust the volume of the second speaker installed corresponding to the second door located opposite the door This will prevent the vehicle from being exposed to the outside of the vehicle if the vehicle door is opened to a greater extent. Sound leakage can be suppressed.

[0054] In addition, the multiple speakers installed in the vehicle cabin are separate speakers, and are mainly used for sound If a woofer that outputs low to mid-range frequencies is included, the sound from the woofer will spread throughout the entire space, so the sound from the woofer will not be heard from the vehicle doors. When the first door is opened, the first door installed corresponding to the first door that is opened Even if the speaker volume is reduced, sound leakage outside the vehicle may not be sufficiently suppressed. Therefore, the acoustic control unit of the vehicle acoustic control device according to this embodiment determines the degree of opening of the first door. Depending on the situation, the volume of a woofer installed in the vehicle, which is different from the first speaker, is further increased. In response to the opening of the first door, a speaker other than the first speaker may be output from the vehicle interior. In this way, when the door of the vehicle is open, the volume of the woofer installed in the vehicle may be reduced by a predetermined amount. When this happens, it can further reduce sound leakage outside the vehicle.

[0055] [Second embodiment] A second embodiment to which the present invention is applied will be described below. The vehicle in which the dual-use acoustic control device 10 is installed has a plurality of speakers for up to two channels. In the second embodiment, the vehicle acoustic control device 10 is When multi-channel speakers other than 4 channels are installed in the vehicle, The acoustic control method of the dual-use acoustic control device will be described with reference to Figs. 6 and 7. An example of an acoustic control method in the case where a plurality of speakers are used for multiple channels will be described.

[0056] The vehicle in Figure 6 has 19 speakers, SPout1 to SPout19. In the example shown in Figure 6, SPout1 to SPout19 are installed in the following positions. The speakers SPout1 to SPout6 are installed on the dashboard. The SPout7 and SPout8 speakers are connected to the right front door FDR and the left front door FDR, respectively. SPout9, SPout10, SPout13 and S The speakers Pout11, SPout12, and SPout14 are located in the right rear door RD Installed in the R and RDL rear doors. SPout15 to SPout19 speakers is installed on the rear tray.

[0057] In addition, each of the speakers SPout1 to SPout19 is provided with, for example, as shown in FIG. For example, the speaker of the SPout1 channel is named The name is 2way front system (Tw) (right), the speaker of the SPout2 channel. The name of the system is 2way front system (Mid) (right). Tw indicates that it is a tweeter speaker, and Mid indicates that it is a midrange speaker. This indicates that:

[0058] [Sound control method] For example, when the left front door FDL of the vehicle shown in FIG. 6 is opened, the sound control unit 1 11 identifies SPout8 (first speaker) installed in the left front door FDL. do.

[0059] The degree of opening of the left front door FDL is smaller than the preset degree of opening. If the degree of opening is the degree of opening of the left front door FDL, the sound control unit 111 In response, the volume controller 14 is instructed to reduce the volume of the SPout8. The control unit 111 controls the SPout 7. Reduce the volume of SPout13, SPout14 and SPout19 by a specified amount. In response to the opening of the left front door FDL, the woofer S The volume of Pout7, SPout13, SPout14 and SPout19 is reduced by a specified amount. The user may instruct the volume control 14 to

[0060] On the other hand, the degree of opening of the left front door FDL is greater than or equal to the preset degree of opening. If the above is true, the sound control unit 111 controls the SP out7 (the second speaker). Then, the acoustic control unit 111 further specifies SPou Mutes t8 and adjusts the volume of SPout7 according to the degree to which the left front door FDL is opened. In addition, the audio control unit 111 instructs the volume controller 14 to reduce the left front driver. Depending on the degree of opening of the FDL, the woofer SPout13, SPout14 and SP The volume adjuster 14 is instructed to reduce the volume of out19 by a predetermined amount.

[0061] For example, when the left rear door RDL of the vehicle shown in FIG. are SPout11, SPout12 and SPout Identify 14 (first speaker).

[0062] The degree of opening of the left rear door RDL is smaller than the preset degree of opening. In the case where the degree of opening of the left rear door RDL is set to the above, the sound control unit 111 performs the following in accordance with the degree of opening of the left rear door RDL: Volume adjuster to reduce the volume of SPout11, SPout12 and SPout14 Furthermore, the sound control unit 111 instructs the left rear door RDL to be opened according to the degree of opening of the left rear door RDL. , the volume of the woofers SPout7, SPout8, SPout13, and SPout19 It instructs the volume control 14 to reduce the volume by a predetermined amount.

[0063] On the other hand, the left rear door RDL is opened to a degree equal to or greater than the preset degree of opening. In this case, the sound control unit 111 outputs the SPout9 , SPout10 and SPout13 (second speakers) are further specified. The sound control unit 111 mutes SPout11, SPout12, and SPout14. Depending on the degree of opening of the left rear door RDL, SPout9, SPout10 and SPout The audio control unit 111 instructs the volume controller 14 to reduce the volume of the audio signal 13. Depending on the degree to which the left rear door RDL is opened, the woofers SPout7, SPout8 and The volume adjuster 14 is instructed to reduce the volume of SPout 19 by a predetermined amount.

[0064] Please note that tweeters have a strong directivity, so if the tweeter is installed on the pillar or dashboard, If the speaker is connected to the speaker, the tweeter volume does not need to be changed. The arrangement and names of the speakers are not limited to the example shown in FIG. 6. If not, all speakers installed in the vehicle will be activated according to the degree to which the door is opened. The user may instruct the volume control 14 to reduce the volume of the speaker.

[0065] As described above, the vehicle acoustic control device 10 according to this embodiment is installed in a vehicle. Even if the vehicle door is open, the sound generated by the multiple speakers is not heard when the vehicle door is open. This can suppress sound leakage to the outside of the vehicle and reduce deterioration of the audio environment inside the vehicle. do.

[0066] [Third embodiment] A third embodiment to which the present invention is applied will be described below. The same parts as those in the embodiment are given the same reference numerals and the description thereof will be omitted.

[0067] The vehicle acoustic control device 10 according to the first embodiment described above is configured to control the sound of each of a plurality of doors of a vehicle. The degree of opening of the doors is obtained, and the second door is opened according to the degree of opening of the first door. The volume of the first speaker installed corresponding to the first door is reduced. However, for example, in FIG. The speakers 21, 22, 23 and 24 in the center are separate speakers, and the speakers are arranged in the vehicle interior. When using a sound effect, even if just one channel changes the sound, The surround effect inside the vehicle is diminished.

[0068] Therefore, the vehicle acoustic control device 10 according to the third embodiment is configured to: A first channel audio signal to be reproduced through a first speaker and a second channel audio signal to be reproduced through a second speaker are The DSP 12 processes the audio signal of the first channel to be input, and the audio control unit controls the DSP 12 to process the audio signal of the second channel to be input. When you mute the volume of channel 1, the audio signal of the first channel is sent to the second speaker. The second speaker outputs the first channel audio signal and the second channel audio signal. The DSP 12 is controlled to reproduce a mono audio signal including the signal.

[0069] [Sound control method] For example, the acoustic control by the acoustic control unit 111 of the vehicle acoustic control device 10 according to the second embodiment An example of the control method will be described with reference to FIG. 2A. The speaker is a separate type speaker that reproduces stereo audio signals.

[0070] In FIG. 2A, the open state acquisition unit 110 determines that the left front door FDL is open. The acoustic control unit 111 identifies the speaker 21 (first speaker) at the left front of the vehicle. The speaker 22 (second speaker) at the right front of the vehicle is further specified. The acoustic control unit 111 , and instructs the volume adjuster 14 to mute the volume of the speaker 21. Instructs DSP12 to switch the sound of speaker 22 from stereo playback to mono playback. Specifically, the audio control unit 111 instructs the left front ( A front left channel (first channel) audio signal is supplied to a speaker 22 to be played back. The speaker 22 receives the audio signal of the left front (front L) channel and the audio signal reproduced by the speaker 22. and a right front (front R) channel (second channel) audio signal to be This instructs the DSP 12 to play the audio signal of the analog input. The sound that should be played back is not reproduced, and the surround effect in the vehicle is weakened, resulting in a poor audio environment in the vehicle. This can reduce the deterioration of the condition.

[0071] [Procedure for acoustic control processing] With reference to the flowchart shown in FIG. 8, the vehicle acoustic control device 10 according to the third embodiment will be described. An example of the procedure of the acoustic control process will be described. Step S106 and step S112 correspond to steps S101 to S103 and step S10 in FIG. 6. This is the same operation as step S112, and the explanation will be omitted.

[0072] In step S201, the audio control unit 111 mutes the volume of the first speaker. The process proceeds to step S202, where the audio control unit 111 , the DSP12 is set to switch the sound of the second speaker from stereo playback to mono playback. The audio control unit 111 instructs the audio of all speakers other than the first speaker. , you may switch from stereo playback to mono playback.

[0073] The process proceeds to step S203, in which the open state acquisition unit 110 receives the first The process proceeds to step S204, where the open state acquisition unit 110 determines whether the first door is closed based on the acquired information on the degree of opening of the first door. If the first door is closed (YES in step S204), the process On the other hand, if the first door is not closed (step S20 If the answer is NO in step S114, the process proceeds to step S112.

[0074] In step S205, the audio control unit 111 sets the volume of the first speaker to the normal volume. That is, the audio control unit 111 instructs the volume controller 14 to return the volume to the original setting in step S201. The volume setting value of the first speaker that was muted in is set to the volume setting before the first door was opened. The volume controller 14 is then instructed to restore the original value. Then, the process proceeds to step S206.

[0075] In step S206, the audio control unit 111 controls the audio from the second speaker to be monaural. In other words, the audio control unit 1 instructs the DSP 12 to switch from stereo playback to stereo playback. 11, the sound of the second speaker switched in step S202 is turned on when the first door is opened. Then, the process proceeds to step S112. nothing.

[0076] [Effects of the third embodiment] As described above, the vehicle acoustic control device according to the third embodiment converts stereo audio signals A first channel audio signal to be reproduced by a first speaker and a second speaker and a second channel audio signal to be reproduced by the audio control unit. When the volume of the microphone is muted, the audio signal of the first channel is sent to the second speaker. , a first channel audio signal and a second channel audio signal are output from a second speaker. Controls playback of mono audio signals.

[0077] As a result, when the vehicle door is open, depending on the degree to which the vehicle door is open, The volume of the speakers installed in relation to the open vehicle doors is reduced, and The sound from the speaker installed in the opposite door to the open door is recorded as a stereo. It is possible to switch from stereo playback to mono playback, which helps prevent sound from leaking outside the vehicle. In order to reduce the volume of the speaker installed in relation to the open door, Even if there is a problem, the surround effect inside the vehicle is reduced, reducing the deterioration of the audio environment inside the vehicle. can.

[0078] As described above, the embodiments of the present invention have been described. The descriptions and drawings that form part of this disclosure This disclosure should not be construed as limiting the present invention. Alternative embodiments, examples and operational techniques will become apparent.

[0079] The acoustic control unit 111 of the vehicle acoustic control device 10 mutes the first speaker. When the first speaker is turned on, the DSP 12 may be instructed to mute the volume of the first speaker. The DSP 12 mutes the volume of the first speaker based on an instruction from the audio control unit 111. do. [Explanation of symbols]

[0080] 10 Vehicle acoustic control device 110 Open status acquisition unit 111 Sound control section

Claims

1. an open state acquisition unit that acquires an open state of each of a plurality of doors provided in the vehicle; According to the degree of opening acquired by the open state acquisition unit, one of the plurality of doors is When it is determined that the first door is opened, the first door is installed corresponding to the opened door. The volume setting value of the first speaker is set based on the volume setting value before the first door is opened. As a standard, the volume of the first speaker is changed according to the degree of opening of the first door, and the volume of the first speaker is lowered. and an acoustic control unit that performs control to reduce the The acoustic control unit is configured to, in response to the opening of the first door, output a front speaker different from the first speaker. To reduce the volume of a woofer installed in the vehicle Vehicle acoustic control device.

2. Acquire the degree of opening of each of a plurality of doors equipped in the vehicle, According to the acquired degree of opening, it is determined that any one of the plurality of doors is opened. When it is determined that the door is an open door, a first speaker installed corresponding to the first door is The volume setting value of the first door is set based on the volume setting value before the first door is opened. and performing control to reduce the volume of the first speaker by changing the volume of the first speaker in accordance with the degree of opening of the first speaker. The control includes controlling a speaker of the vehicle that is different from the first speaker in response to the opening of the first door. Reduces the volume of the woofers installed inside A vehicle acoustic control method.

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