Vehicle acoustic control device and vehicle acoustic control method

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

[0006] , , , , , , , , , , ,

[0005]

[0001] The present invention relates to a vehicle audio control device and a vehicle audio control method.

Background Art

[0002] In Patent Document 1, when a part of a plurality of opening / closing bodies such as a door or a window of a vehicle is in an open state, in order to suppress sound leakage to the outside of the vehicle, a speaker corresponding to the open opening / closing body is muted. A vehicle audio control device is described.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] <...> The vehicle audio control device described in Patent Document 1 has a configuration in which sound leakage is suppressed by muting a speaker near an open door or window. Therefore, the in-vehicle audio environment for passengers to listen to music deteriorates.

[0005] <00000...> An object of the present invention is to provide a vehicle audio control device and a vehicle audio control method that can suppress sound leakage to the outside of the vehicle when a door of the vehicle is in an open state and can reduce deterioration of the in-vehicle audio environment.

Means for Solving the Problems

[0006] The present invention includes an open state acquisition unit that acquires the degree of opening of each door of a plurality of doors provided in a vehicle, Based on the degree of opening acquired by the open state acquisition unit, one of the multiple doors will be opened. When it is determined that it has been opened, the first door, which is the first door that has been opened, is installed in the same location as the first door. The speaker volume setting is adjusted based on the volume setting before the first door is opened. A control that changes according to the degree of opening of the first door and reduces the volume of the first speaker, and the first door In response to the opening, the volume of the woofer installed inside 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] This invention obtains the degree of opening of each of the multiple doors that a vehicle has, and the obtained degree of opening When it is determined that one of the multiple doors has been opened, the opened door The volume setting of the first speaker, which is installed in relation to the first door, is set to the first door Based on the volume setting value before the door was opened, the volume is changed according to the degree to which the first door is opened, and the second Control to reduce the volume setting of speaker 1, and in response to the opening of the first door, the first speaker This is a vehicle sound control method that reduces the volume of a woofer installed inside the vehicle, which is different from the above. To provide the law. [Effects of the Invention]

[0008] According to the vehicle sound device and vehicle sound control method of the present invention, when the vehicle door is in an open state In such a situation, it is necessary to suppress sound leakage to the outside of the car while also preventing deterioration of the in-car audio environment. This can be reduced. [Brief explanation of the drawing]

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

Embodiments for Carrying Out the Invention

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

[0011] [First Embodiment] [Configuration of Vehicle Acoustic Control Device] Referring to FIG. 1, a configuration example of the vehicle acoustic control device and its peripheral devices according to the first embodiment will be described. The vehicle acoustic control device 10 according to the first embodiment is mounted on a vehicle. As shown in FIG. 1, the vehicle acoustic control device 10 is a vehicle ECU (Electronic Co 1, the vehicle acoustic control device 10 is a vehicle ECU (Electronic Control Unit) The ntrol unit 30 and multiple speakers 21, 22, 23 installed inside the vehicle It is connected to the audio source 50, which is 24.

[0012] The vehicle sound control device 10 detects multiple doors equipped in the vehicle, as detected by the door sensor 40. The degree to which each door is open is obtained from the vehicle's ECU30, and based on the obtained degree of openness... When it is determined that one of the multiple doors has been opened, the open vehicle Depending on the degree to which the doors are open, the sound from the speakers installed corresponding to the open doors of the vehicle will be heard. It controls the amount to adjust it.

[0013] The door sensor 40 is a sensor that detects the degree to which each of the multiple doors on the vehicle is open. Yes, and although not specifically illustrated, they are installed in appropriate locations on each door. Here, the door opens The degree refers to the extent to which the door on which the door sensor 40 is installed is open relative to the door being fully open. This refers to information indicating whether something is open or closed. If the degree of openness is 0, it means the door is closed. This means that the door sensor 40 is, for example, the left front door, right front door, left rear door of the vehicle. They are installed on the front door, the right rear door, and the back door, respectively.

[0014] The door sensor 40 is installed, for example, on the door hinge and consists of a bar that moves in and out in response to the opening and closing of the door. The system has a sensor that, when the door is opened, determines the degree to which the vehicle door is open from the position where the bar sensor is recessed. It detects the alignment. In addition, the door sensor 40 has a camera that photographs the door hinge area, and the door From the image taken when it was opened, for example, the distance of the red line on the door hinge, which is colored red. The degree to which the door is open may be detected by calculating the distance.

[0015] Furthermore, the door sensor 40 detects when the vehicle's door stopper is in a predetermined state, such as when the door is half-open or fully open. If the door stopper has a function to fix the door in place, the following are installed at each predetermined position of the door stopper. It has a sensor, and from the sensor signal when the door is opened to each predetermined position of the door stopper, The degree of opening of A may also be detected.

[0016] The door sensor 40 is connected to the vehicle ECU 30 and receives information on the degree to which each door is open. The output is sent to the vehicle ECU 30. The vehicle ECU 30 is mounted in the vehicle and receives input from the door sensor 40. The degree to which each door is opened is output to the vehicle sound control device 10. The type and number of sensors 40 are not particularly limited, and the degree of opening of each door is measured by multiple types of door sensors. It may also be detected in combination with Sensor 40. Also, if the vehicle has sliding doors... In the case where the vehicle is equipped with an opening and closing device that automatically opens and closes the doors, the door sensor 40 is not used. The degree to which the door is open may be detected from the opening and closing device.

[0017] Multiple speakers 21-24 are installed inside the vehicle and output sound inside the vehicle. Peekers 21-24 convert the analog audio signals input to them into audio. Although not shown, speaker 21 is a speaker installed in the left front door of the vehicle, Speaker 22 is installed in the right front door, and speaker 23 is installed in the left rear door. These are speakers that are placed in the room, and speaker 24 is a speaker that is installed in the right rear door.

[0018] Speakers 21-24 may be full-range speakers or separate speakers. It may also be a speaker. If each speaker is a separate type speaker, it mainly produces high frequencies of sound. It may include a tweeter that outputs a certain frequency and a woofer that primarily outputs mid-to-low frequencies. The tweeter is mounted on the dashboard, and the woofer is mounted under the door, etc. The treble and woofer may be installed in different locations. Also, the number and arrangement of multiple speakers may vary. The placement is not particularly limited.

[0019] The vehicle sound control device 10 includes a controller 11 and an audio DSP (Digital Signal Processor)12 (hereinafter abbreviated as DSP12) and digital The analog conversion unit 13 (hereinafter abbreviated as DAC13), the volume control unit 14, and the amplification unit 1 It is equipped with 5 (hereinafter abbreviated as AMP15). The vehicle sound control device 10 is It consists only of the Torola 11, DSP 12, DAC 13, volume control 14, and AM P15 may be configured as a separate device from the vehicle acoustic control device 10.

[0020] Controller 11 is a CPU (Central Processing Unit), It is a general-purpose computer equipped with memory, storage devices, input / output units, etc. Controller 11 This involves obtaining information from the vehicle's ECU 30 regarding the degree to which each of the vehicle's multiple doors is open. The controller 11 controls the DSP 12 and volume control 14, which are installed inside the vehicle. This instructs the system to control the audio data input to speakers 21-24. Specifically, the CPU It loads various programs stored in the memory into memory and includes them in the program. It executes various commands. As a result, the controller 11 is equipped with the vehicle sound control device 10. It functions as multiple information processing circuits. Controller 11 functions as multiple information processing circuits It comprises an open state acquisition unit 110 and an acoustic control unit 111. The controller 11 is This may be implemented using a System-on-a-chip (SoC).

[0021] The open state acquisition unit 110 receives information from the vehicle ECU 30 regarding the open state of each of the multiple doors that the vehicle has. Information on the degree of release is acquired. The open state acquisition unit 110 uses the acquired information on the degree of release to acquire Next, determine whether each door is open or not. The door determined to be open is designated as the first door. This shall be referred to as such.

[0022] The sound control unit 111 specially selects the first door that has been determined to be open by the open state acquisition unit 110. The sound control unit 111 determines the first of the speakers 21-24 installed inside the vehicle. Identify the speaker installed in response to A (hereinafter referred to as the first speaker). Specifically, sound The sound control unit 111 has a storage unit (not shown) that stores information about the speaker associated with the first door. Obtain the information from and identify the first speaker.

[0023] Furthermore, the first speaker is the one that has the greatest impact on sound leakage to the outside when the door is open. It is a speaker, for example, a speaker installed on the first door. If no speaker is installed, the first speaker will be installed as close as possible to the first door. It may also be a speaker that is installed. The first door is the left front door or the right front door. In that case, even if the first speaker is a speaker installed on the A-pillar of the vehicle Good. If the first door is the left rear door or the right rear door, the first speaker is located in the vehicle. It could also be a speaker installed on the B-pillar.

[0024] The acoustic control unit 111 receives the degree of opening of the first door obtained by the open state acquisition unit 110. Accordingly, the volume of the first speaker installed corresponding to the first door is reduced. The regulator 14 is instructed. Specifically, the sound control unit 111 instructs the first door before it is opened. Based on the volume setting, the ratio by which the volume setting is reduced is changed according to the degree to which the door is open. The sound control unit 111 adjusts the sound of the first speaker as the degree to which the door is open increases. The volume control 14 is instructed to reduce the volume.

[0025] Furthermore, the acoustic control unit 111 receives the information that the first door is open, which has been obtained by the open state acquisition unit 110. If the degree of opening is greater than or equal to a predetermined degree of opening, the first speed The volume control 14 may be instructed to mute the volume of the sound. The sound control unit 111, Depending on the degree to which the first door is open, the door located opposite the first door (hereinafter referred to as the second door) The volume of the speaker installed in response to (hereinafter referred to as the second speaker) is reduced. The regulator 14 may also be instructed. In this case, the sound control unit 111 will select from among the multiple speakers, Further identify the second speaker installed corresponding to the second door. Specifically, the acoustic control Unit 111 is a speaker installed corresponding to the second door, which is linked to the first door. The information is retrieved from the memory unit to identify the second speaker.

[0026] Furthermore, the second speaker is designed to minimize sound leakage to the outside when the door is open. This is a different speaker from the first speaker; for example, the speaker installed in the second door. The sound control unit 111 determines when the degree of opening of the first door exceeds a preset degree of opening. When the degree of opening is as shown above, the volume of the first speaker is muted, and the first door is opened Depending on the degree of emission, the volume control 14 is instructed to reduce the volume of the second speaker. That is good. If a speaker is not installed in the second door, the second speaker will be... The speaker may be the one closest to the second door. The second speaker is located on Pillar A. Alternatively, it could be a speaker mounted on the B-pillar.

[0027] The DSP12 receives, for example, 4 channels from the audio source 50, which is the source of the audio signal. An audio signal is input. Based on instructions from the sound control unit 111, the DSP12 controls each channel. Digital audio data of 4-channel audio signals to be supplied to speakers corresponding to the channels. This is supplied to DAC13. As will be described later, DSP12 controls speakers 21-24 individually. In the case of a controllable separate speaker, based on instructions from the acoustic control unit 111 Then, the audio data for each speaker channel is switched from 4-channel output to mono output. It cannot be replaced.

[0028] If the audio signal input to DSP12 is a 2-channel audio signal, DSP1 2. The audio signal from the left channel is sent to the speakers installed in the left front door and left rear door. The audio signal for the right channel is supplied and installed in the right front door and right rear door speakers. It is supplied to Ka.

[0029] The DAC13 converts the supplied digital audio data into an analog audio signal. The analog audio signal converted by AC13 is input to the volume control 14.

[0030] The volume control unit 14 outputs from each speaker based on instructions from the sound control unit 111. The volume level of the sound is adjusted by the volume control 14. The audio signal from the log is input to AMP15.

[0031] The AMP15 amplifies the incoming analog audio signal and outputs it to each of the speakers 21-24. To supply.

[0032] [Sound control method] Refer to Figures 2A to 2C for an example of an acoustic control method for the vehicle acoustic control device 10 shown in Figure 1. This will be explained. Note that in the following explanation, the pre-set degree of door opening is considered to be the door fully open. In contrast, let's assume it's half the degree of openness.

[0033] Figure 2A shows the vehicle with the left front door FDL open, and the degree of opening of the left front door FDL. However, this indicates a state where the door is less than half open. In Figure 2A, the open state acquisition unit 110 determines that the left front door FDL is open. The sound control unit 111 determines that the vehicle The speaker 21 on the left front is identified. The acoustic control unit 111 determines the degree of opening of the left front door FDL. The system determines that the degree of opening is less than half of the door's full opening. (Acoustic Control Unit 1) 11 reduces the volume of speaker 21 by a predetermined amount depending on the degree to which the left front door FDL is open. The volume control unit 14 is instructed to do so. The sound control unit 111 also controls the volume of the speaker 21. If the degree of opening of the left front door FDL decreases after reducing it by a predetermined amount, The volume of speaker 21 will increase by a predetermined amount in accordance with the decrease in the degree to which the front door FDL is open. You may also instruct the volume control 14.

[0034] Figure 2B shows the vehicle with the left front door FDL open, and the degree of opening of the left front door FDL. However, this indicates a state where the door is more than half open. In Figure 2B, the open state acquisition unit 110 determines that the left front door FDL is open. The sound control unit 111 determines that the vehicle The speaker 21 on the left front is identified. The acoustic control unit 111 determines the degree of opening of the left front door FDL. The system determined that the door was more than half open relative to its full opening, and the speed of the vehicle's right front - Further identify speaker 22. The sound control unit 111 mutes the volume of speaker 21 and the left Depending on the degree to which the front door FDL is open, the volume of speaker 22 is reduced by a predetermined amount. The volume control unit 14 is instructed. The sound control unit 111 controls the degree of opening of the left front door FDL. If the volume is fully open, the volume of speaker 21 will be muted, and the volume of speaker 22 will also be muted. The volume control 14 may be instructed to mute. In addition, the sound control unit 111 will control the speaker. - After muting the volume of channels 21 and 22, the degree of opening of the left front door FDL decreases. In that case, the μ of speaker 21 will decrease in proportion to the degree of opening of the left front door FDL. You may also instruct the volume control 14 to release the toggle switch.

[0035] Figure 2C shows the vehicle's back door BD in the open state. The acquisition unit 110 determines that the vehicle's back door BD has been opened. The sound control unit 111 then Identify speaker 23 located at the left rear of the vehicle and speaker 24 located at the right rear of the vehicle. Acoustic control unit 1 11 reduces the volume of speakers 23 and 24 by a predetermined amount depending on the degree to which the back door BD is open. The volume control unit 14 is instructed to reduce the volume. The sound control unit 111 also controls the speaker 23 and If the degree to which the back door BD is open decreases after reducing the volume of 24 by a predetermined amount, In accordance with the decrease in the degree of opening of the back door BD, the volume of speakers 23 and 24 is increased by a predetermined amount. You may also instruct the volume control 14 to do so.

[0036] Figure 3 shows a vehicle equipped with a vehicle sound control device 10, with all doors closed. State 2 with the left front door FDL open, in state 2 speaker 21 (first speaker In state 3 and state 2, with speaker 21 and speaker 22 (second speaker) muted, The amount of sound leakage to the outside of the vehicle for each frequency band in state 4 with both (-) muted. An example of the observed results is shown. In this case, with all doors closed (state 1), the distance to the outside of the vehicle is the shortest. The amount of sound leakage is reduced, and in state 2 with the left front door FDL open, the sound is most external to the vehicle. The amount of sound leaking out will increase.

[0037] In state 3, where speaker 21 is muted, the frequency response across the entire frequency band is approximately 10d compared to state 2. The amount of sound leakage has decreased by approximately b. That is, the sound leakage is reduced in accordance with the first door that is opened. Reducing the volume of the first speaker (muting it) suppresses the amount of sound leaking outside the car. Furthermore, in state 4, where speaker 22 is muted, the mid-to-high frequency response is approximately 5-7 compared to state 3. The amount of sound leakage has decreased by approximately dB. That is, it is installed in accordance with the first door that is open. The volume of the first speaker is muted, and furthermore, the second door located opposite the first door... When the volume of the second speaker, which was installed in response to this, is muted, the amount of sound leaking outside the car is further reduced. It is suppressed.

[0038] Furthermore, Figure 4 shows a vehicle equipped with the vehicle sound control device 10, with all doors closed. State 1, State 5 with the left rear door RDL open, In State 5, speaker 23 (first speaker In state 6 and state 5, with the speaker 23 and speaker 24 (second speaker) muted, The amount of sound leakage to the outside of the vehicle for each frequency band when both speakers (Peaker) are muted (state 7). An example of the observed results is shown below. As shown in Figure 4, even when the left rear door RDL is opened, Reduce (mute) the volume of the first speaker installed in response to the open first door. This reduces the amount of sound leakage to the outside of the vehicle. Also, it is installed in response to the open first door. The volume of the first speaker is muted, and furthermore, the second door located opposite the first door When the volume of the second speaker, which is installed in response to the first speaker, is muted, the amount of sound leaking outside the car decreases. It is suppressed.

[0039] [Procedure for acoustic control processing] Next, referring to the flowchart shown in Figure 5, we will describe the vehicle acoustic control device according to the first embodiment. An example of the procedure for acoustic control processing using 10 is described below.

[0040] The vehicle sound control device 10 is controlled when the power to the vehicle sound control device 10 is turned on. When Ra11 starts operating, the process shown in Figure 5 begins.

[0041] First, in step S101, the open state acquisition unit 110 receives information from the vehicle ECU 30, The process involves obtaining information on the degree to which each of the multiple doors on the vehicle is open. The open state acquisition unit 110 then determines, based on the acquired information on the degree of openness, that each door is open. Determine whether or not it was opened. If any of the doors is opened (Step S1 If the answer is YES in 02, the process proceeds to step S103. Meanwhile, if both doors are open If not present (NO in step S102), the process proceeds to step S112.

[0042] In step S103, the acoustic control unit 111 identifies the first door that has been opened. The sound control unit 111 controls the first speaker among the multiple speakers, which is installed in relation to the first door. Identify the speaker. Specifically, the sound control unit 111 identifies the first door stored in the memory unit. The system retrieves information about the speaker associated with the speaker and identifies the first speaker.

[0043] The process proceeds to step S104, where the acoustic control unit 111 receives the open state acquisition unit 110. The degree to which the first door is opened is greater than or equal to a predetermined degree of opening. It determines whether or not this is the case. For example, the sound control unit 111 determines whether the degree of opening of the first door is the same as the case. Whether the degree of opening is more than half of the fully open position of door A, that is, the degree of opening of the first door, Determine whether the door is open by more than 50% relative to its fully open position. (First door opening degree) However, if the degree of opening is 50% or more of the door's full opening (step S104: YES) ) The process proceeds to step S106. Meanwhile, the degree to which the first door is open is when the door is fully open. If the degree of openness is less than 50% (NO in step S104), then process Proceed to step S105.

[0044] In step S105, the acoustic control unit 111 controls the degree to which the first door is open, The volume control unit is instructed to reduce the volume of the first speaker. For example, the sound control unit 111 is when the degree to which the first door is open is 25% of the degree to which the door is fully open. This involves setting the volume value of the first speaker relative to the volume value before the first door is opened. The volume control unit 14 is instructed to reduce the volume by more than half. Specifically, the sound control unit 111, If the volume setting of the first speaker was 11 before the first door was opened, the first speaker The volume control 14 is instructed to change the speaker's volume setting to 5. Then the process is performed Proceed to S109.

[0045] In step S106, the acoustic control unit 111 is located opposite the first door Further identify the second speaker installed in conjunction with the door. Specifically, the acoustic control unit 1 11 is installed in correspondence with the second door, which is associated with the first door, as stored in the memory unit. The system retrieves information about the first speaker and identifies the second speaker.

[0046] The process proceeds to step S107, in which the sound control unit 111 controls the volume of the first speaker. The volume control 14 is instructed to do so. For example, the sound control unit 111 opens the first door. When the degree of opening is 50% of the door's full opening, the volume of the first speaker The volume control 14 is instructed to mute the first If the volume setting of the first speaker was 11 before the door was opened, the first speaker The volume control 14 is instructed to change the volume setting value of the volume control to 0.

[0047] The process proceeds to step S108, in which the acoustic control unit 111, according to the degree to which the first door is open, Then, the volume control 14 is instructed to reduce the volume of the second speaker. For example, acoustic control In section 111, the first door is open to 75% of its full opening. In this case, the volume setting of the second speaker is set to the volume setting before the first door is opened. The volume control unit 111 is instructed to reduce the volume by more than half. Specifically, the sound control unit 111 If the volume setting of the second speaker was 11 before the first door was opened, then the second The volume control 14 is instructed to change the speaker volume setting to 5. Also, sound control In section 111, the degree of opening of the first door is 100% of the degree of opening relative to the door being fully open. In the case where the first door is fully open, the volume of the second speaker is muted. The volume control unit 14 is instructed to do so. Specifically, the sound control unit 111 is instructed to do so when the first door is opened. If the volume setting of the previous second speaker was 11, set the volume setting of the second speaker to 0 The volume control 14 is instructed to change to the specified value. Then, the process proceeds to step S109.

[0048] In step S109, the open state acquisition unit 110 receives the first door from the vehicle ECU 30. Information on the degree of opening of A is obtained. The process proceeds to step S110, opening state acquisition unit 11 0 indicates whether the first door was closed or not, based on the acquired information about the degree to which the first door was open. Determine if the first door is closed (YES in step S110). Proceed to step S111. On the other hand, if the first door is not closed (in step S110) If NO), the process proceeds to step S112.

[0049] In step S111, the sound control unit 111 controls the volume of the first and second speakers. The volume control unit 111 is instructed to return to normal volume. In steps S105, S107, and S108, the first and reduced or muted Adjust the volume setting of speaker 2 to return it to the volume setting it was at before the first door was opened. Instructions are given to the regulator 14. Specifically, the sound control unit 111 instructs the first door before it is opened. If the volume setting for speakers 1 and 2 is 11, the volume of speakers 1 and 2 The volume control 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 turns on the power supply of the vehicle sound control device 10. Determine whether it is OK or not. If the power to the vehicle sound control device 10 is not off, i.e., the vehicle If the power supply of the sound control device 10 is on (NO in step S112), the process is as follows: Return to S101. On the other hand, if the power to the vehicle sound control device 10 is off (step S112 If the answer is YES, the process shown in Figure 5 will be terminated.

[0051] [Effects of the First Embodiment] As described above, the vehicle sound control device according to this embodiment is provided by the vehicle with multiple doors A door opening state acquisition unit acquires the degree of opening of each door, and the opening degree acquired by the door opening state acquisition unit When the system determines that one of the multiple doors has been opened, the door is opened. Depending on the degree to which the first door is opened, the second door installed in correspondence with the first door It includes an acoustic control unit that controls the volume of speaker 1.

[0052] As a result, when the vehicle doors are opened, depending on the degree to which the vehicle doors are open, The volume of the speakers installed in response to the open doors of the vehicle can be reduced. In other words, the volume of the speaker corresponding to the open door of the vehicle is suddenly muted. Instead, the speaker volume can be gradually reduced depending on the degree to which the door is open. This suppresses sound leakage to the outside of the car and prevents deterioration of the in-car audio environment. This can reduce the problem.

[0053] Furthermore, the sound control unit of the vehicle sound control device according to this embodiment is acquired by the open state acquisition unit. The degree to which the first door is opened is greater than or equal to a predetermined degree of opening. In that case, the volume of the first speaker is muted, and depending on the degree to which the first door is open, the first Adjust the volume of the second speaker, which is installed in conjunction with the second door located opposite the first door. Control is performed. This will allow more people to escape outside the vehicle if the vehicle doors are opened to a greater extent. It can suppress sound leakage.

[0054] Furthermore, the multiple speakers installed inside the vehicle are separate-type speakers, primarily for sound... If a woofer is included to output mid-low frequencies, the sound from the woofer will spread throughout the entire space, including the vehicle doors. When it is in the open state, the first door which is the open door is installed in the same way as the first door Even if the speaker volume is reduced, it may not be possible to sufficiently suppress sound leakage outside the vehicle. Therefore, the sound control unit of the vehicle sound control device according to this embodiment determines the degree of opening of the first door. Accordingly, the volume of a woofer installed inside the vehicle, which is different from the first speaker, is further controlled. It may be reduced. Also, in response to the opening of the first door, a different speaker from the first speaker is used inside the vehicle. The volume of the woofer installed may be reduced by a predetermined amount. This will allow the vehicle door to remain open. When this state is reached, it can further suppress sound leakage to the outside of the vehicle.

[0055] [Second Embodiment] A second embodiment applying the present invention will be described below. In the first embodiment described above, a car Multiple speakers installed inside a vehicle equipped with the dual-purpose sound control device 10 are 2-channel The first example described was the case of 4 channels. In the second embodiment, the vehicle sound control device 10 When a vehicle is equipped with multiple channels of speakers other than 4 channels, The acoustic control method for the dual-purpose acoustic control device will be described. Referring to Figures 6 and 7, the device is installed inside the vehicle. This section describes an example of an acoustic control method for a multi-channel system using multiple speakers.

[0056] The vehicle in Figure 6 has 19 speakers inside, SPout1 to SPout19. In the example shown in Figure 6, SPout1 to SPout19 are installed at the following locations. The speakers SPout1 to SPout6 are installed on the dashboard. The speakers for SPout7 and SPout8 are located in the right front door (FDR) and left front door (FDR), respectively. It is installed in the front door FDL. SPout9, SPout10, SPout13 and S Speakers Pout11, SPout12, and SPout14 are located in the right rear door RD, respectively. Speakers SPout15~SPout19 are installed in the R and left rear door (RDL). It is installed on the rear tray.

[0057] Furthermore, each of the speakers SPout1 to SPout19 has, for example, as shown in Figure 7. They are given different names to each other. For example, the speaker for channel SPout1 The name is 2way front system (Tw) (right), SPout2 channel speaker The name of the system is something like "2-way front system (Mid) (right)". Tw indicates a tweeter speaker, and Mid indicates a midrange speaker. This indicates that.

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

[0059] Furthermore, the degree to which the left front door FDL is open is smaller than the preset degree of openness. If the degree of opening is such that the acoustic control unit 111 determines the degree of opening of the left front door FDL Accordingly, the volume control 14 is instructed to reduce the volume of SPout8. Furthermore, the sound The control unit 111 controls the SPout, which is a woofer, according to the degree to which the left front door FDL is open. 7. Reduce the volume of SPout13, SPout14 and SPout19 by a predetermined amount. The volume control 14 is instructed. Also, 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 predetermined amount. You may also instruct the volume control 14 to do so.

[0060] On the other hand, the degree to which the left front door FDL is open is greater than the preset degree of openness. If this is the case, the sound control unit 111 will control the SP installed in the right front door FDR. Further identify out7 (the second speaker). Then, the sound control unit 111 controls SPou Muting t8, the volume of SPout7 is adjusted according to the degree to which the left front door FDL is open. The volume control unit 14 is instructed to reduce the volume. Furthermore, the sound control unit 111 controls the left front door Depending on the degree of opening of the FDL, the woofers SPout13, SPout14 and SP The volume control 14 is instructed to reduce the volume of output 19 by a predetermined amount.

[0061] For example, when the left rear door RDL of the vehicle shown in Figure 6 is opened, the acoustic control unit 111 These are SPout11, SPout12 and SPout located on the left rear door RDL. Identify speaker 14 (the first speaker).

[0062] Furthermore, the degree to which the left rear door (RDL) is open is less than the preset degree of openness. If it is a degree, the sound control unit 111 will, according to the degree of opening of the left rear door RDL, The volume control reduces the volume of SPout11, SPout12, and SPout14. The instruction is given to 14. Furthermore, the sound control unit 111 responds according to the degree of opening of the left rear door RDL. The volume of the woofers SPout7, SPout8, SPout13, and SPout19 The volume control 14 is instructed to reduce the volume by a predetermined amount.

[0063] On the other hand, the degree to which the left rear door (RDL) is open exceeds the preset degree of openness. In that case, the sound control unit 111 controls the SPout 9 located in the right rear door RDR. Further identify SPout10 and SPout13 (second speaker). Then, sound The sound control unit 111 mutes SPout11, SPout12 and SPout14, Depending on the degree to which the left rear door RDL is open, SPout9, SPout10 and SPout The volume control 14 is instructed to reduce the volume of 13. Furthermore, the sound control unit 111, Depending on the degree to which the left rear door RDL is open, the woofers SPout7, SPout8 and The volume control 14 is instructed to reduce the volume of SPout 19 by a predetermined amount.

[0064] Note that tweeters have a strong directivity, so if the tweeter is installed on the pillar or dashboard... If this is the case, you do not need to change the tweeter volume. The arrangement and naming of the speakers are not limited to the example shown in Figure 6. Note that individual speakers can be controlled. If not available, all speakers installed inside the vehicle will be activated according to the degree to which the open door is opened. You may instruct the volume control 14 to reduce the volume of the sound.

[0065] As described above, the vehicle sound control device 10 according to this embodiment is installed inside a vehicle. Even if there are multiple speakers and it is a multi-channel system, when the vehicle door is open... This suppresses sound leakage to the outside of the vehicle and reduces the deterioration of the in-car audio environment. ru.

[0066] [Third Embodiment] A third embodiment to which the present invention is applied will be described below. In the third embodiment, the first Parts identical to those in the embodiments are denoted by the same reference numerals and their descriptions are omitted.

[0067] The vehicle sound control device 10 according to the first embodiment described above controls each of the multiple doors provided by the vehicle. The degree to which the door is open is obtained, and according to the degree to which the first door is open, the second The volume of the first speaker, which is installed corresponding to door 1, is reduced. However, for example, Figure 1 The speakers 21, 22, 23, and 24 inside are separate type speakers, and the sound is delivered to the interior of the vehicle. In cases where a sound effect is being achieved, if even one channel's audio changes, The surround sound effect inside the car will be diminished.

[0068] Therefore, the vehicle sound control device 10 according to the third embodiment uses a stereo audio signal. The audio signal of the first channel to be played by the first speaker and the audio signal to be played by the second speaker The DSP12 controls the audio signal of the second channel that should be processed, and the sound control unit controls the second When the volume of channel 1 is muted, the audio signal of channel 1 is transmitted to channel 2. The audio signal from the first channel and the audio signal from the second channel are supplied to the second speaker. The DSP12 is controlled to play back a monaural audio signal that includes the signal.

[0069] [Sound control method] For example, the sound control by the sound control unit 111 of the vehicle sound control device 10 according to the second embodiment One example of the method will be explained using Figure 2A as an example. Note that multiple speakers installed inside the vehicle in Figure 2A The speaker is a separate-type speaker that reproduces stereo audio signals.

[0070] In Figure 2A, the open state acquisition unit 110 determines that the left front door FDL is open. The sound control unit 111 identifies the speaker 21 (first speaker) located on the left front of the vehicle, Further identify speaker 22 (second speaker) located on the right front of the vehicle. The sound control unit 111 The volume control unit 111 instructs the volume controller 14 to mute the volume of speaker 21. The DSP12 switches the sound of speaker 22 from stereo playback to mono playback. The sound control unit 111 instructs the left front speaker 21 to reproduce the sound. The audio signal from the front left channel (first channel) is supplied to speaker 22, Speaker 22 receives the audio signal from the left front (front L) channel, and the audio is played back by speaker 22. Mono, including the audio signal of the right front (front R) channel (second channel) The DSP12 is instructed to play the audio signal from the speaker 21. The sound that should be played is not reproduced, the surround sound effect in the vehicle is diminished, and the audio environment inside the vehicle This can reduce the worsening of the condition.

[0071] [Procedure for acoustic control processing] Referring to the flowchart shown in Figure 8, the vehicle sound control device 10 according to the third embodiment An example of the procedure for acoustic control processing is described below. Steps S101 to S103 in Figure 8, Step S106, step S112 corresponds to steps S101-S103 and step S10 in Figure 5. 6. This is the same operation as in step S112, so the explanation is omitted.

[0072] In step S201, the sound control unit 111 mutes the volume of the first speaker. The volume control 14 is instructed to do so. The process proceeds to step S202, and the sound control unit 111 The DSP12 switches the sound of the second speaker from stereo playback to mono playback. The sound control unit 111 controls the sound of all speakers except the first speaker. You can also switch from stereo playback to mono playback.

[0073] The process proceeds to step S203, and the open state acquisition unit 110 receives the first The system obtains information on the degree to which the door is open. The process proceeds to step S204, where the open state acquisition unit is located. Based on the acquired information on the degree to which the first door was open, 110 determines whether the first door has been closed. Determine whether or not. If the first door is closed (YES in step S204), proceed. The process proceeds to step S205. On the other hand, if the first door is not closed (step S20 If the answer is NO in step 4, the process proceeds to step S112.

[0074] In step S205, the sound control unit 111 sets the volume of the first speaker to the normal volume. The volume control 14 is instructed to return to its original position. That is, the sound control unit 111 performs step S201 The volume setting of the first speaker, which was muted, is set to the volume setting before the first door was opened. The volume control 14 is instructed to return to its original value. Then, the process proceeds to step S206.

[0075] In step S206, the sound control unit 111 controls the sound from the second speaker to monaural. The DSP12 is instructed to switch from playback to stereo playback. That is, the sound control unit 1 11 is the sound from the second speaker, which was switched in step S202, when the first door is open. The volume control 14 is instructed to return to the sound level before the change. Then, the process proceeds to step S112. nothing.

[0076] [Effects of the third embodiment] As described above, the vehicle sound control device according to the third embodiment is a stereo audio signal The audio signal of the first channel to be played back by the first speaker and the second speaker The audio control unit controls the audio signal of the second channel which should be played back, and the first channel When muting the volume of the first channel, the audio signal of the first channel is supplied to the second speaker. The second speaker includes the audio signal of the first channel and the audio signal of the second channel. Controls the device to play a monaural audio signal.

[0077] As a result, when the vehicle doors are opened, depending on the degree to which the vehicle doors are open, The volume of the speakers installed in response to the open doors of the vehicle is reduced, The sound from the speaker installed in the door opposite the open door is controlled. It is possible to switch from mono playback to mono playback. Therefore, sound leakage outside the car is suppressed. In order to achieve this, if the volume of the speaker installed in response to the open door is reduced, Even if present, it reduces the deterioration of the in-car audio environment due to the diminished surround sound effect. can.

[0078] As described above, embodiments of the present invention have been described, but the descriptions and drawings that constitute part of this disclosure are This disclosure should not be understood as limiting the invention. From this disclosure, various alternatives will be known to those skilled in the art. Alternative embodiments, examples, and operational techniques will become clear.

[0079] Furthermore, the sound control unit 111 of the vehicle sound control device 10 mutes the first speaker. In this case, you may instruct the DSP12 to mute the volume of the first speaker. Based on the instructions of the sound control unit 111, the DSP 12 mutes the volume of the first speaker. do. [Explanation of symbols]

[0080] 10. Vehicle acoustic control devices 110 Open state acquisition unit 111 Acoustic Control Unit

Claims

1. An open state acquisition unit that acquires the degree to which each of the multiple doors on the vehicle is open, The system includes an acoustic control unit that, when it is determined that one of the multiple doors has been opened based on the degree of opening acquired by the open state acquisition unit, controls the volume setting values ​​of a first speaker group, which includes multiple speakers with different frequency bands installed in relation to the first door that has been opened, and a second speaker group, which includes multiple speakers with different frequency bands installed in relation to the second door, to change according to the degree of opening of the first door, based on the volume setting value before the first door was opened, thereby reducing the volume of the speaker groups. The sound control unit reduces the volume of the first speaker group if the degree of opening of the first door is less than a preset degree of opening. If the opening of the first door exceeds a preset degree of opening, the volume of the first speaker group is muted, and the volume of the second speaker group installed in the second door located opposite the first door is reduced. Vehicle sound control device.

2. The sound control unit controls the first speaker according to the degree to which the first door is open. The control system reduces the volume of the woofer, which is different from the second speaker group, by a predetermined amount. The vehicle sound control device according to claim 1.

3. The degree to which each of the multiple doors on the vehicle is open is obtained. When it is determined that one of the multiple doors has been opened based on the acquired degree of opening, the volume setting values ​​of the first speaker group, which includes multiple speakers with different frequency bands installed in relation to the first door that has been opened, and the second speaker group, which includes multiple speakers with different frequency bands installed in relation to the second door, are changed according to the degree of opening of the first door, based on the volume setting value before the first door was opened, thereby reducing the volume of the speaker groups. If the acquired degree of opening of the first door is less than a preset degree of opening, the volume of the first speaker group is reduced. If the opening of the first door exceeds a preset degree of opening, the volume of the first speaker group is muted, and the volume of the second speaker group, which is installed in relation to the second door located opposite the first door, is reduced. A method for controlling the acoustics of a vehicle.

Images