JP2022102805A - Acoustic device and acoustic control method - Google Patents

Abstract

To provide an acoustic device and an acoustic control method capable of clarifying sound images.SOLUTION: An acoustic device in an embodiment includes a detection unit and an output control unit. The detection unit detects a sound image position of a first predetermined sound. The output control unit controls the output of a second predetermined sound different from the first predetermined sound so that the sound image of the second predetermined sound positions in a position that does not overlap with the sound image position of the first predetermined sound detected by the detection unit.SELECTED DRAWING: Figure 1D

Description

The present invention relates to an acoustic device and an acoustic control method.

Conventionally, there is known an acoustic device that outputs acoustic signals of various sound sources such as music and voice from a plurality of speakers arranged in the space in a space such as a vehicle interior of a vehicle (see, for example, Patent Document 1). ). In the prior art, the reverberation sound with a sense of distance and a sense of spaciousness is obtained by positively adding the reverberation sound to the direct sound and reproducing the sound.

Japanese Unexamined Patent Publication No. 61-2026600

However, there is room for improvement in the prior art in terms of clarifying the sound image. That is, for example, since noise such as running noise and air conditioner noise is generated in the vehicle interior, there is a possibility that the noise is mixed with music, voice, and the like, and the sound image becomes unclear.

The present invention has been made in view of the above, and an object of the present invention is to provide an acoustic device and an acoustic control method capable of clarifying a sound image.

In order to solve the above problems and achieve the object, the present invention includes a detection unit and an output control unit in the acoustic device. The detection unit detects the sound image position of the first predetermined sound. The output control unit localizes the sound image of the second predetermined sound different from the first predetermined sound to a position that does not overlap with the sound image position of the first predetermined sound detected by the detection unit. Controls the output of a given sound.

According to the present invention, the sound image can be clarified.

FIG. 1A is a schematic explanatory view of the sound image width and the feeling of being wrapped. FIG. 1B is a schematic explanatory view of the law of the first wavefront. FIG. 1C is a schematic explanatory view of an acoustic control method according to an embodiment. FIG. 1D is a schematic explanatory view of an acoustic control method according to an embodiment. FIG. 2 is a block diagram showing a configuration example of an acoustic system including an acoustic device. FIG. 3 is a diagram showing an example of sound image position information. FIG. 4 is a diagram showing an example of reverberation sound characteristic information. FIG. 5A is a diagram illustrating control by the output control unit. FIG. 5B is a diagram illustrating control by the output control unit. FIG. 5C is a diagram illustrating control by the output control unit. FIG. 6 is a flowchart showing a processing procedure executed by the acoustic device.

Hereinafter, embodiments of the acoustic device and the acoustic control method disclosed in the present application will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiments shown below.

Further, in the following, the case where the acoustic device according to the embodiment is mounted on a vehicle will be described as an example.

In the following, first, an outline of the acoustic control method by the acoustic apparatus according to the embodiment will be described with reference to FIGS. 1A to 1D. FIG. 1A is a schematic explanatory view of a sound image width ASW and a feeling of being wrapped LEV. FIG. 1B is a schematic explanatory view of the law of the first wavefront. 1C and 1D are schematic explanatory views of an acoustic control method according to an embodiment.

As shown in FIG. 1A, it is known that a listener (listener) L who listens to a sound from a sound source S in space can perceive two types of spatial impressions. One spatial impression is the sound image width ASW defined as the "apparent sound source width" that is perceived by fusing the direct sound both temporally and spatially, and the other spatial impression is "other than the apparent sound source". It is a feeling of wrapping LEV defined as "a feeling that the listener's surroundings are filled with the sound source of." The sound image width ASW is the width of the sound image A1 derived from the direct sound which is the initial component of the sound source signal. Further, the wrapped feeling LEV is a sound image A2 derived from a reverberation sound (described later) which is a late component of the sound source signal.

In designing and evaluating these sound image width ASW and the feeling of being wrapped LEV, an index using the so-called "law of the first wavefront" may be used. In such an index, as shown in FIG. 1B, two regions R1 and R2 defined by two thresholds TH1 and TH2 are defined.

The region R1 is a region including a component (initial component) mainly including a direct sound among the components included in the sound source signal. For example, if the initial component of the region R1 is large, the sound image width ASW becomes large, so that the listener L feels that the sound image is diffused, and it is evaluated that the sound quality is poor (unclear) depending on the sound source. The direct sound is, for example, a sound directly coming from a sound source and not including a sound reflected by a wall or the like.

Further, the region R2 is a region containing a component (late component) mainly including a reverberation sound among the components included in the sound source signal. For example, if the reverberation sound component of the region R2 is large, the wrapped feeling LEV becomes large, so that it is evaluated that the wrapped feeling is enhanced by the listener L feeling that it is diffused in terms of hearing. The reverberation sound is, for example, a sound in which the sound of the sound source is reflected by a wall or the like and is delayed in time from the direct sound.

Although not shown here, in a relatively narrow space such as a passenger compartment, the direct sound and the reverberant sound are difficult to separate, and the direct sound and the reverberant sound are likely to be mixed. In such a case, the component of the reverberation sound in the region R2 becomes smaller, and the wrapped feeling LEV becomes smaller. Therefore, in a narrow space such as a passenger compartment where direct sound and reverberation sound are mixed, the acoustic device positively adds a pseudo reverberation sound to the direct sound to obtain the reverberation sound of the region R2. It is possible to increase the size of the component and secure the feeling of being wrapped in LEV.

Next, the acoustic control method by the acoustic apparatus 10 will be described with reference to FIG. 1C. As shown in FIG. 1C, the acoustic device 10 is mounted on the vehicle 1. A plurality of speakers 50a and 50b are installed in the vehicle 1. For example, the speaker 50a is installed on the front side of the vehicle 1 in the vehicle interior space, and the speaker 50b is installed on the upper side. The positions where the speakers 50a and 50b are installed are merely examples and are not limited, and can be installed at any position in the vehicle interior space, such as the rear side, the lower side, and the left and right sides of the vehicle 1. Is.

The sound device 10 outputs a sound source signal to the speakers 50a and 50b, and the sound including the above-mentioned direct sound and pseudo reverberation sound from the speakers 50a and 50b (hereinafter, may be referred to as "reproduced sound"). Can be output. Here, the reproduced sound is, for example, a sound including music and voice, but is not limited thereto. The reproduced sound is an example of the second predetermined sound.

Further, the acoustic device 10 can localize the sound image A of the reproduced sound at an arbitrary position. Specifically, the acoustic device 10 can localize the sound image A1 of the direct sound and the sound image A2 of the reverberation sound at arbitrary positions. For example, the acoustic device 10 can move the spatial position of the sound image A1 of the direct sound by adjusting the loudness of the direct sound output from the speakers 50a and 50b. Similarly, the acoustic device 10 can move the spatial position of the sound image A2 of the reverberation sound by adjusting the magnitude of the reverberation sound output from the speakers 50a and 50b.

Note that FIG. 1C shows an example in which the sound image A1 of the direct sound and the sound image A2 of the reverberant sound are localized at similar positions in front of the listener L. Further, in the example of FIG. 1C, since the position of the sound image A2 of the reverberation sound is far from the head La of the listener L, the listener L does not feel the wrapped feeling LEV in the reproduced sound. This is because when the reproduced sound is an announcement voice or the like, the listener L can clearly hear the reproduced sound if there is no wrapped feeling LEV.

By the way, noise such as running noise and air conditioner noise is generated in the vehicle interior of the vehicle 1. Therefore, depending on the noise state, the position of the noise image B may overlap with the position of the reproduced sound image A. In such a case, noise may be mixed with the reproduced sound, and the sound image A of the reproduced sound may be unclear.

Therefore, the acoustic device 10 according to the present embodiment is configured so that the sound image A of the reproduced sound can be clarified.

Hereinafter, the processing of the acoustic device 10 will be specifically described with reference to FIG. 1D. First, the acoustic device 10 detects the position of the noise image B (step S1). For example, the acoustic device 10 detects the position of the noise image B by collecting the sound in the vehicle interior using a microphone 60 provided at an appropriate position in the vehicle interior and analyzing the collected sound. .. The noise is an example of the first predetermined sound.

In the above, the position of the noise image B is detected by using the microphone 60, but the present invention is not limited to this, and any detection method can be used. For example, the sound image B of noise including a running sound changes according to a running state such as a vehicle speed and a window opening / closing state. Further, the noise image B including the air conditioner sound changes according to the operating state of the air conditioner. Therefore, for example, the correlation between the running state, the open / closed state of the window, the operating state of the air conditioner, and the position of the noise image B is calculated in advance through experiments and the like, and the information indicating the calculated correlation is obtained by the acoustic device 10. It is stored in the storage unit 20 (see FIG. 2). Then, the acoustic device 10 may detect the position of the noise image B from the actual running state, the open / closed state of the window, the operating state of the air conditioner, and the correlation information.

Next, the acoustic device 10 controls to shift the position of the sound image A of the reproduced sound with respect to the position of the sound image B of the detected noise. For example, the acoustic device 10 controls the output of the reproduced sound so that the sound image A of the reproduced sound is localized at a position that does not overlap with the position of the sound image B of the detected noise (step S2). Specifically, the acoustic device 10 outputs the reproduced sound so that the sound image A1 of the direct sound and the sound image A2 of the reverberant sound included in the sound image A of the reproduced sound are localized at a position that does not overlap with the position of the sound image B of the noise. To control.

In the example of FIG. 1D, the acoustic device 10 moves the position of the sound image A of the reproduced sound upward by adjusting the magnitude of the reproduced sound (direct sound or reverberation sound) output from the speakers 50a and 50b. To do so. The direction in which the position of the sound image A is moved is not limited to the upward direction, and can be set in any direction.

As described above, in the present embodiment, for example, by controlling the sound output so that the sound image A of the reproduced sound and the sound image B of the noise are spatially different positions, the reproduced sound is mixed with the noise. Therefore, the sound image A of the reproduced sound can be clarified.

Next, the configuration of the acoustic system including the acoustic device 10 according to the embodiment will be described with reference to FIG. FIG. 2 is a block diagram showing a configuration example of an acoustic system including the acoustic device 10. In FIG. 2, only the components necessary for explaining the features of the present embodiment are represented by functional blocks, and the description of general components is omitted.

In other words, each component shown in FIG. 2 is a functional concept and does not necessarily have to be physically configured as shown. For example, the specific form of distribution / integration of each functional block is not limited to the one shown in the figure, and all or part of it is functionally or physically distributed in any unit according to various loads and usage conditions. -It is possible to integrate and configure.

As shown in FIG. 2, the acoustic system 100 includes an acoustic device 10, a sound source device 40, a speaker 50, a microphone 60, a vehicle speed sensor 70, and a display 80.

The sound source device 40 is, for example, a device that outputs a sound source signal of a sound (reproduced sound) including music and voice. Such a sound source signal is input to the acoustic device 10. In the sound device 10, a sound source signal for output is generated, and such a signal is input to the speaker 50.

The speaker 50 outputs the reproduced sound according to the sound source signal input from the acoustic device 10. For example, the speaker 50 outputs a direct sound which is a sound source signal or a pseudo reverberation sound generated from the sound source signal. Although the number of speakers 50 is a plurality as described above, the number of speakers 50 is not limited to this, and may be one.

The microphone 60 collects sound in the vehicle interior. The microphone 60 outputs information about the collected sound to the acoustic device 10. The vehicle speed sensor 70 detects the speed of the vehicle 1 and outputs a signal indicating the detected vehicle speed to the acoustic device 10.

The display 80 is mounted on the vehicle 1. The display 80 can display, for example, an image related to a sound source of reproduced sound, which will be described later. A head-up display can be used as the display 80, but the display 80 is not limited to this.

Next, the acoustic device 10 will be described. The acoustic device 10 includes a storage unit 20 and a control unit 30.

The storage unit 20 is realized by, for example, a semiconductor memory element such as a RAM (Random Access Memory) or a flash memory, or a storage device such as a hard disk or an optical disk. In the example of FIG. 2, the sound image position information 21 and the storage unit 20 are realized. The reverberation sound characteristic information 22 is stored.

The sound image position information 21 is information regarding the sound image position of the sound whose sound image position is controlled. Specifically, for example, in the case of direct sound or reverberation sound included in the reproduced sound, control is performed to shift the sound image position so as not to overlap with the position of the noise image B, in other words, control to change the sound image position. It will be done. The sound image position information 21 includes information regarding the sound image position after the change.

Here, the sound image position information 21 will be described with reference to FIG. FIG. 3 is a diagram showing an example of the sound image position information 21.

As shown in FIG. 3, the sound image position information 21 includes items such as “noise sound image position”, “sound that changes the sound image position”, and “changed sound image position”, and each item is associated with each other. ing.

The "noise sound image position" is information indicating a noise sound image position assumed in advance. For example, the "noise sound image position" includes the noise sound image position that may be detected by collecting sound from the microphone 60, the noise sound image position corresponding to the vehicle speed, the noise sound image position corresponding to the open / closed state of the window, and the air conditioner. It contains information indicating the noise image position in the vehicle interior, which is assumed under various conditions, such as the noise image position corresponding to the driving state of the vehicle. In the example shown in FIG. 3, for convenience, the "noise image position" is abstractly described as "noise position F1", but specific information is stored in the "noise position F1". And. Hereinafter, other information may be described in an abstract manner.

The "sound that changes the sound image position" is information indicating a sound that is a target of control for changing the sound image position. The "sound for changing the sound image position" includes, for example, information indicating a direct sound of the reproduced sound, a pseudo reverberation sound of the reproduced sound, and the like.

In this embodiment, as will be described later, it is also possible to make the listener L feel the feeling of being wrapped in noise LEV by generating a pseudo reverberation sound of noise and outputting it from the speaker 50. Is. Since the acoustic device 10 can control to change the sound image position of the reverberation sound of noise, the "sound for changing the sound image position" may include information indicating a pseudo reverberation sound of noise.

The "changed sound image position" is an information indicating the changed sound image position in the control for changing the sound image position. The "changed sound image position" includes information indicating a position that does not overlap with the corresponding "noise sound image position" in the sound image position information 21.

In the example shown in FIG. 3, in the sound image position information 21, when the sound image position of noise is "noise position F1", the sound for changing the sound image position is "sound G1", and the sound image position after the change is "position H1". It shows that it is.

Returning to the description of FIG. 2, the reverberation sound characteristic information 22 is information indicating the characteristics of the reverberation sound that is changed according to the vehicle speed. The reverberation sound characteristic information 22 will be described with reference to FIG. FIG. 4 is a diagram showing an example of the reverberation sound characteristic information 22.

As shown in FIG. 4, the reverberation sound characteristic information 22 includes items such as “vehicle speed” and “characteristics of reverberation sound”, and each item is associated with each other.

"Vehicle speed" indicates information indicating the vehicle speed. "Characteristics of reverberation sound" is information indicating the characteristics of reverberation sound. The characteristics of the reverberation sound include, but are not limited to, the magnitude of the reverberation sound and the sound image position of the reverberation sound. The characteristics of the reverberation sound are changed according to the vehicle speed, which will be described later.

In the example shown in FIG. 4, the reverberation sound characteristic information 22 indicates that the characteristic of the reverberation sound is “characteristic K1” when the vehicle speed is “vehicle speed J1”.

Returning to the description of FIG. 2, the control unit 30 includes an acquisition unit 31, a detection unit 32, an output control unit 33, and a display control unit 34, and includes, for example, a CPU (Central Processing Unit) and a ROM (Read Only). Includes computers with memory), RAM (Random Access Memory), input / output ports, and various circuits.

The CPU of the computer functions as an acquisition unit 31, a detection unit 32, an output control unit 33, and a display control unit 34 of the control unit 30, for example, by reading and executing a program stored in the ROM.

Further, at least a part or all of the acquisition unit 31, the detection unit 32, the output control unit 33, and the display control unit 34 of the control unit 30 are hardware such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). It can also be configured with hardware.

The acquisition unit 31 acquires a sound source signal output from the sound source device 40. Then, the acquisition unit 31 transmits the acquired sound source signal to the output control unit 33. The acquisition unit 31 acquires information about the sound collected by the microphone 60 and transmits it to the detection unit 32. The acquisition unit 31 acquires a signal indicating the vehicle speed output from the vehicle speed sensor 70 and transmits it to the detection unit 32 and the output control unit 33.

The detection unit 32 detects the sound image position of noise. For example, the detection unit 32 detects the position of the noise image B by analyzing the information regarding the sound collected by the microphone 60. The detection unit 32 transmits information indicating the position of the sound image B of the detected noise to the output control unit 33.

The detection unit 32 may detect the position of the noise image B in place of or in addition to the above analysis based on a running state such as vehicle speed, a window opening / closing state, an air conditioner operating state, and the like. For example, as described above, the detection unit 32 has the noise sound image B based on the actual running state, the open / closed state of the window, the operating state of the air conditioner, and the information indicating the correlation calculated and stored in advance. The position may be detected.

The output control unit 33 controls the output of the reproduced sound. Specifically, the output control unit 33 generates a sound source signal for output including a direct sound and a pseudo reverberation sound based on the sound source signal of the reproduced sound of the sound source device 40, and outputs the sound source signal to the speaker 50. As a result, the reproduced sound corresponding to the sound source signal is output from the speaker 50. The output control unit 33 can generate the above-mentioned reverberation sound by using, for example, a filter. As the filter, for example, an FIR (Finite Impulse Response) filter, an IIR (Infinite Impulse Response) filter, or the like can be used, but the filter is not limited thereto.

Further, for example, the output control unit 33 reads out the sound image position information 21 of the storage unit 20 so that the sound image A of the reproduced sound is localized at a position (shifted position) that does not overlap with the position of the sound image B of the detected noise. , Control the output of the reproduced sound (see FIG. 1D). In other words, the output control unit 33 controls the output of the reproduced sound so that the position of the sound image A of the reproduced sound and the position of the sound image B of the noise are separated by a predetermined distance or more. The predetermined distance is set to a value that does not mix with the reproduced sound and noise, but is not limited to this, and can be set to any value.

As described above, in the output control unit 33 according to the present embodiment, for example, in order to control the output of the reproduced sound so that the sound image A of the reproduced sound and the sound image B of the noise are spatially different positions. Noise is less likely to be mixed with the reproduced sound, and thus the sound image A of the reproduced sound can be clarified.

Further, the output control unit 33 outputs the reproduced sound so that, for example, when the window of the vehicle interior is opened, the sound image A of the reproduced sound is localized in the space near the window opposite to the opened window. You may control it. As a result, the reproduced sound and the noise coming in from the window are less likely to be mixed, and thus the sound image A of the reproduced sound can be clarified.

In addition, the reproduced sound includes a direct sound and a pseudo reverberation sound. Therefore, the output control unit 33 localizes both the sound image A1 of the direct sound and the sound image A2 of the reverberant sound to a position that does not overlap with the position of the sound image B of the noise, but is not limited to this. That is, the output control unit 33 may localize either the sound image A1 of the direct sound or the sound image A2 of the reverberation sound to a position that does not overlap with the position of the sound image B of the noise. Even in such a case, it is possible to clarify the sound image A of the reproduced sound.

Further, the output control unit 33 may control the output of the reproduced sound so that the position of the sound image A1 of the direct sound and the position of the sound image A2 of the reverberation sound do not overlap. Such control will be described with reference to FIG. 5A. 5A and 5B and 5C described later are both diagrams illustrating control by the output control unit 33.

As shown in FIG. 5A, the output control unit 33 localizes both the sound image A1 of the direct sound of the reproduced sound and the sound image A2 of the reverberation sound at a position that does not overlap with the position of the sound image B of the noise, and the sound image of the reverberation sound. A2 may be localized in a predetermined range D including the head La of the listener L.

As a result, the sound image A1 of the direct sound of the reproduced sound, the sound image A2 of the reverberant sound, and the sound image B of the noise are positioned so as not to overlap each other, so that the direct sound of the reproduced sound, the reverberant sound, and the noise are less likely to be mixed with each other. Sound images A1 and A2 such as direct sound and reverberant sound of reproduced sound can be clarified. Further, by localizing the sound image A2 of the reverberation sound to a predetermined range D including the head La of the listener L, the listener L can feel a sufficient wrapped feeling LEV.

Further, the output control unit 33 may control the output of the reproduced sound so as to read the reverberation sound characteristic information 22 and change the characteristic of the reverberation sound according to the vehicle speed.

Here, the characteristics of the vehicle speed and the reverberation sound will be described. First, the vehicle speed correlates with noise including running noise. Specifically, the noise increases as the vehicle speed increases. When the noise increases, for example, the listener L becomes less likely to hear the reverberation sound included in the reproduced sound, so that the feeling of being wrapped up may decrease.

Therefore, in the output control unit 33 according to the present embodiment, the characteristics of the reverberation sound are changed according to the vehicle speed. For example, the output control unit 33 controls the output of the reproduced sound by increasing the magnitude of the reverberation sound (an example of the characteristics of the reverberation sound) as the vehicle speed increases.

As a result, for example, even when the noise increases as the vehicle speed increases, the listener L can hear the reverberation sound included in the reproduced sound, so that the decrease in the feeling of being wrapped up can be suppressed.

Further, the output control unit 33 may control the output of the reproduced sound so as to change the position of the sound image A2 of the reverberation sound (an example of the characteristics of the reverberation sound) according to the vehicle speed. This will be described with reference to FIG. 5B.

As shown in FIG. 5B, as the vehicle speed increases, the noise increases and the position of the noise image B also rises. This is because the noise that changes according to the vehicle speed comes from the road surface (road noise), and as the vehicle speed increases, the noise increases from the bottom to the top. Then, the position of the noise image B may reach a predetermined range D including the head La of the listener L.

In this way, when the position of the noise sound image B and the predetermined range D overlap, the output control unit 33 specifically determines the sound image of the reverberation sound so that the sound image A2 of the reverberation sound is localized around the predetermined range D. The output of the reproduced sound is controlled so that A2 is localized above the predetermined range D.

As a result, for example, even when the position of the noise sound image B rises as the vehicle speed increases and reaches a predetermined range D including the head La of the listener L, the noise is less likely to be mixed with the reverberation sound. Therefore, the sound image A2 of the reverberation sound can be clarified, that is, the decrease in the wrapped feeling LEV can be suppressed.

Further, as described above, the output control unit 33 can generate a pseudo reverberation sound of noise and control to change the sound image position of the reverberation sound. This will be described with reference to FIG. 5C.

As shown in FIG. 5C, for example, when the sound image A1 of the direct sound of the reproduced sound and the sound image A2 of the reverberant sound are localized at the same position in front of the listener L, the head La of the listener L is set. There is no sound image in the space of the predetermined range D including the space, and the space is vacant. In such a case, the output control unit 33 may generate a pseudo reverberation sound by using a filter for noise such as an air conditioner sound, and localize the sound image B2 of the reverberation sound in a predetermined range D. At this time, the sound image B2 of the reverberation sound of the noise and the sound image A2 of the reverberation sound of the reproduced sound are prevented from interfering with each other.

Thereby, it is possible to make the listener L feel the feeling of being wrapped in the noise LEV by the pseudo reverberation of the noise. Since the noise here is an air conditioner sound, it is possible to improve and assist the comfort of the timbre of the listener L and the control of the sensible temperature by the wrapped feeling LEV of the air conditioner sound.

Returning to the description of FIG. 2, the display control unit 34 controls the display of the display 80. Here, the display 80 is a head-up display, and as shown in FIG. 5C, an image (image) 81 can be projected on the windshield 2 or the outside of the vehicle.

The display control unit 34 can control the display 80 to display, for example, an image 81 related to a sound source of reproduced sound on the windshield 2 or outside the vehicle. An example of such an image 81 is an image of a mouth that utters an announcement sound when the reproduced sound is an announcement sound, and an image of the musical instrument when the reproduced sound is a musical instrument sound.

In this way, by displaying the image 81 related to the sound source of the reproduced sound on the windshield 2 or outside the vehicle, the listener L has the sound image A of the reproduced sound (for example, the sound image A1 of the direct sound) near the windshield 2 or outside the vehicle. It becomes easy to perceive. Therefore, the position of the sound image A of the reproduced sound perceived by the listener L and the position of the sound image B of the noise become more separated from each other, so that the noise is less likely to be mixed with the reproduced sound, and thus the sound image A of the reproduced sound is produced. It can be further clarified.

Next, a specific processing procedure in the acoustic device 10 will be described with reference to FIG. FIG. 6 is a flowchart showing a processing procedure executed by the acoustic device 10.

As shown in FIG. 6, the control unit 30 of the acoustic device 10 detects the position of the noise image B based on, for example, information on the sound collected by the microphone 60 (step S10).

Next, the control unit 30 controls the output of the reproduced sound so that the sound image A of the reproduced sound is localized at a position that does not overlap with the position of the sound image B of the detected noise (step S11).

As described above, the acoustic device 10 according to the embodiment includes a detection unit 32 and an output control unit 33. The detection unit 32 detects the sound image position of noise (an example of the first predetermined sound). The output control unit 33 outputs the reproduced sound so that the sound image of the reproduced sound (an example of the second predetermined sound) different from the noise is localized at a position that does not overlap with the sound image position of the noise detected by the detection unit 32. Control. This makes it possible to clarify the sound image.

Further effects and variations can be easily derived by those skilled in the art. For this reason, the broader aspects of the invention are not limited to the particular details and representative embodiments described and described above. Thus, various modifications can be made without departing from the spirit or scope of the overall concept of the invention as defined by the appended claims and their equivalents.

10 Acoustic device 30 Control unit 31 Acquisition unit 32 Detection unit 33 Output control unit 34 Display control unit

Claims (5)

A detection unit that detects the sound image position of the first predetermined sound, and
The output of the second predetermined sound is output so that the sound image of the second predetermined sound different from the first predetermined sound is localized at a position that does not overlap with the sound image position of the first predetermined sound detected by the detection unit. An acoustic device characterized by having an output control unit for controlling. The second predetermined sound includes a direct sound and a pseudo reverberation sound, and includes a direct sound and a pseudo reverberation sound.
The output control unit
It is characterized in that the output of the second predetermined sound is controlled so that at least one of the sound image of the direct sound and the sound image of the reverberation sound is localized at a position that does not overlap with the sound image position of the first predetermined sound. The acoustic device according to claim 1. Equipped with an acquisition unit to acquire the speed of the vehicle,
The output control unit
The acoustic device according to claim 2, wherein the output of the second predetermined sound is controlled so as to change the characteristics of the reverberation sound according to the speed of the vehicle acquired by the acquisition unit. The output control unit
When the sound image position of the first predetermined sound and the predetermined range including the head of the listener of the second predetermined sound do not overlap, the second predetermined sound is localized so that the sound image of the reverberation sound is localized in the predetermined range. When the sound image position of the first predetermined sound and the predetermined range overlap, the output of the second predetermined sound is controlled so that the sound image of the reverberant sound is localized around the predetermined range. The acoustic device according to claim 2 or 3, wherein the sound device is characterized by the above. The detection process for detecting the sound image position of the first predetermined sound, and
The output of the second predetermined sound is output so that the sound image of the second predetermined sound different from the first predetermined sound is localized at a position that does not overlap with the sound image position of the first predetermined sound detected by the detection step. An acoustic control method comprising a controlled output control process.

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