JPWO2020004363A1 - Audio equipment and information management system - Google Patents

Abstract

The sound device has a sound collecting unit that collects the speaker's sound and generates a first signal, an adjusting unit that generates a second signal by adjusting the first signal, and a sound corresponding to the second signal. A sound emitting unit that emits sound in a direction away from the speaker, a sound collecting unit, an adjusting unit, and a sound emitting unit are integrally provided, and a mounting member that is attached to the speaker is provided.

Description

The present disclosure relates to techniques for assisting the hearing of the listener.

Various techniques for assisting the hearing of the listener have been conventionally proposed. For example, Patent Document 1 discloses a hearing aid that emits ultrasonic waves toward the auricle of a listener. Further, Patent Document 2 discloses a small portable loudspeaker.

Japanese Unexamined Patent Publication No. 2013-1996 Japanese Unexamined Patent Publication No. 7-336786

For the listener, wearing a hearing aid can be cumbersome or difficult to purchase for financial reasons, and it may be preferable for the speaker to use a loudspeaker. However, in a loudspeaker as disclosed in Patent Document 2, for example, since the microphone and the speaker are formed separately, it may be inconvenient for the user (speaker). Specifically, when connecting the microphone and the speaker by wire such as an electric wire, the electric wire may interfere with the user's operation, and when connecting these elements wirelessly, one of the elements is lost. It is possible that it is easy to comb. On the other hand, although the microphone and the speaker are integrally configured in the megaphone, there is an inconvenience that the user's operation is hindered because it is necessary to support the megaphone by hand when using the megaphone. In view of the above circumstances, one of the purposes of the present disclosure is to provide an audio device that assists the hearing of the listener while improving the usability for the speaker.

In order to solve the above problems, the sound device according to one aspect of the present disclosure has a sound collecting unit that collects the sound of the speaker and generates a first signal, and a second signal by adjusting the first signal. An adjusting unit that generates a signal, a sound emitting unit that emits a sound corresponding to the second signal in a direction away from the speaker, a sound collecting unit, an adjusting unit, and a sound emitting unit are integrally provided, and the speaker is provided. It is provided with a mounting member to be mounted on the.
The information management system according to one aspect of the present disclosure includes the above-mentioned acoustic device and a storage unit that stores a character string specified by voice recognition for a first signal generated by the sound collecting unit.

It is a schematic diagram of the audio apparatus 10 which concerns on 1st Embodiment of this disclosure. It is a block diagram of the audio apparatus 10 which concerns on 1st Embodiment. It is a block diagram which illustrates the hardware composition of an audio apparatus 10. It is explanatory drawing of the relationship of a sound collecting part 110 and a sound emitting part 120. It is a figure which shows an example of the frequency spectrum of the audio signal Sx and the audio signal Sy. It is a figure which shows an example of the frequency spectrum of the audio signal Sx and the audio signal Sy. It is a figure which shows an example of the frequency spectrum of the audio signal Sx and the audio signal Sy. It is a block diagram of the audio apparatus 10 which concerns on 2nd Embodiment. It is a block diagram of the audio apparatus 10 which concerns on 3rd Embodiment. It is a block diagram of the audio apparatus 10 which concerns on 4th Embodiment. It is a flowchart of the process by the control unit 130 in 4th Embodiment. It is a block diagram of the information management system which concerns on 5th Embodiment.

1. 1. First Embodiment FIG. 1 is a schematic view showing the appearance of the audio device 10 according to the first embodiment of the present disclosure. The audio device 10 of the first embodiment is a portable device that operates by being supplied with power from a built-in battery (not shown). The sound device 10 picks up the voice of the speaker U and emits the adjusted voice to the listener. For example, in a care facility, a speaker U, who is a caregiver, uses the sound device 10 for dialogue with a listener, who is a care recipient such as an elderly person.

FIG. 2 is a block diagram of the audio device 10 according to the first embodiment. As illustrated in FIG. 1, the sound device 10 includes a mounting member 100, a sound collecting unit 110, a sound emitting unit 120, and a control unit 130.

The sound collecting unit 110 is a sound collecting device (microphone) that collects ambient sound and generates an audio signal Sx (an example of a "first signal"). Specifically, the sound collecting unit 110 picks up the voice of the speaker U and generates a voice signal Sx representing the voice. The sound collecting unit 110 in the first embodiment has directivity in the direction of the speaker U (more specifically, the direction of the mouth of the speaker U). The sound collecting unit 110 is composed of, for example, a unidirectional microphone, a microphone array, or a flat microphone. In this embodiment, the case where the sound collecting unit 110 has directivity is illustrated, but the sound collecting unit 110 does not have to have directivity. For example, the sound collecting unit 110 may be configured by an omnidirectional (omnidirectional) microphone or a bone conduction microphone.

The control unit 130 controls the overall operation of the audio device 10. As illustrated in FIG. 3, the control unit 130 is realized by the processing device 61 and the storage device 62. The processing device 61 is composed of a single or a plurality of processors that control each element of the sound device 10. The processing device 61 is, for example, one or more types of processors such as a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), or an ASIC (Application Specific Integrated Circuit). Consists of.

The storage device 62 is a single or a plurality of memories that store a program executed by the processing device 61 and various data used by the processing device 61. The storage device 62 is composed of a known recording medium such as a magnetic recording medium or a semiconductor recording medium. The storage device 62 may be configured by combining a plurality of types of recording media. Further, a portable recording medium that can be attached to and detached from the audio device 10 or an external recording medium (for example, online storage) that the audio device 10 can communicate with via a communication network may be used as the storage device 62.

When the processing device 61 executes the program stored in the storage device 62, the control unit 130 of FIG. 2 is realized. The control unit 130 of the first embodiment has an adjustment unit 132 that generates an audio signal Sy (an example of a “second signal”) by adjusting the audio signal Sx.

The sound emitting unit 120 is a sound emitting device (speaker) that emits sound according to the audio signal Sy output from the control unit 130. The sound emitting unit 120 is composed of, for example, a directional speaker, an array speaker, or a flat plate speaker. The sound emitting unit 120 of the first embodiment emits sound in a direction away from the speaker U and in a preset direction. The direction in which the sound emitting unit 120 emits sound may be set at the time of manufacturing the sound device 10, or may be manually set by the speaker U.

The mounting member 100 is a member for mounting the audio device 10 on the speaker U. As illustrated in FIG. 1, the mounting member 100 includes a substantially elliptical columnar first portion 102 and second portion 104, and a curved portion 106 connecting the first portion 102 and the second portion 104, and is substantially U. It is molded into a shape. The sound device 10 is mounted by hooking the curved portion 106 of the mounting member 100 on the neck of the speaker U. When the sound device 10 is mounted on the speaker U, the first portion 102 of the mounting member 100 is located in front of the right chest of the speaker U, and the second portion 104 is located in front of the left chest of the speaker U. To do. The mounting member 100 is integrally provided with a sound collecting unit 110, a sound emitting unit 120, and a control unit 130. Here, "integrally" includes a state in which these elements are formed on the mounting member 100 and are not separated from each other as separate bodies. As described above, in the sound device 10 of the first embodiment, the sound collecting unit 110, the sound emitting unit 120, and the control unit 130 are integrally provided on the mounting member 100. Therefore, as compared with the case where the sound collecting unit 110 and the sound emitting unit 120 are separate bodies or these elements are not provided on the mounting member 100, the usability of the sound device 10 for the speaker U is improved. It is possible to assist the listener's hearing while making it.

As illustrated in FIG. 1, a sound emitting portion 120 is provided in the vicinity of the end portion of the first portion 102 of the mounting member 100 opposite to the curved portion 106, and the side of the second portion 104 opposite to the curved portion 106. A sound collecting portion 110 is provided in the vicinity of the end portion of the sound collecting portion 110. According to the above configuration, the sound emitting unit 120 is arranged at a position close to the mouth of the speaker U. Therefore, in parallel with the real voice of the speaker U, the sound is emitted from other than the mouth of the speaker U as compared with the case where the sound is emitted from the sound emitting unit 120 located at a position away from the mouth of the speaker U. This reduces the sense of discomfort given to the listener. As a result, a natural dialogue is realized between the speaker U and the listener.

FIG. 4 is an explanatory diagram of the relationship between the sound collecting unit 110 and the sound emitting unit 120. The first portion 102 of the mounting member 100 includes a first surface F1 and the second portion 104 includes a second surface F2. The first surface F1 and the second surface F2 face each other in the same direction. That is, the normal of the first surface F1 and the normal of the second surface F2 are substantially parallel. The sound emitting unit 120 is installed on the first surface F1, and the sound collecting unit 110 is installed on the second surface F2. Therefore, the direction of sound emission by the sound emitting unit 120 (hereinafter referred to as the sound emitting direction) Z1 and the direction of sound collection by the sound collecting unit 110 (hereinafter referred to as the sound collecting direction) Z2 are different. The sound emitting direction Z1 is the main direction in which the sound emitted by the sound emitting unit 120 is emitted. In the configuration in which sound is emitted to the surroundings by vibrating the diaphragm, the sound emitting direction Z1 is perpendicular to the surface of the diaphragm and away from the diaphragm. On the other hand, the sound collecting direction Z2 is the main direction in which the sound picked up by the sound collecting unit 110 arrives. In the configuration in which the sound collecting unit 110 generates the voice signal Sx by detecting the vibration of the diaphragm due to the incoming sound, the direction perpendicular to the surface of the diaphragm and toward the diaphragm is the sound collecting direction Z2.

The aspect of the audio device 10 in FIG. 1 (specifically, the shape of the mounting member 100 and the positions of the sound collecting unit 110 and the sound emitting unit 120) is an example, and may be another aspect. For example, the mounting member 100 may be molded in the shape of a necklace or in the shape of a card holder that can be fixed to the front of the body of the speaker U.

Next, the operation of the adjusting unit 132 will be described with reference to FIGS. 5 to 7. 5 to 7 schematically show the frequency spectra of the audio signal Sx and the audio signal Sy. As described above, the adjusting unit 132 generates the audio signal Sy by adjusting the audio signal Sx. More specifically, as shown in FIG. 5, the adjusting unit 132 increases the acoustic component corresponding to the frequency band B1 (an example of the “first frequency band”) of the audio signal Sx, thereby increasing the audio signal Sy. To generate. FIG. 5 illustrates a case where the frequency band B1 is a frequency band exceeding a predetermined frequency f1. As shown in FIG. 5, in the frequency band above the frequency f1, the signal strength of the audio signal Sy is higher than the signal strength of the audio signal Sx. Therefore, the voice emitted from the sound emitting unit 120 in response to the voice signal Sy is a voice in which the acoustic component corresponding to the frequency band higher than the predetermined frequency f1 among the acoustic components of the speaker U's voice is reinforced. ..

In general, elderly people tend to have difficulty hearing high frequency sounds (eg, 2 kHz or higher). According to the configuration illustrated in FIG. 5, by setting the frequency f1 to, for example, 2 kHz, an audio signal Sy having an increased acoustic component in a frequency band that is difficult for the elderly to hear is generated. Therefore, it is possible to emit a sound that is easy for the elderly to hear.

The frequency band B1 is not limited to the above example. FIG. 6 illustrates a case where the frequency band B1 is a frequency band lower than the predetermined frequency f2. As illustrated in FIG. 6, in the frequency band below the frequency f2, the signal strength of the audio signal Sy is higher than the signal strength of the audio signal Sx. In this way, the adjusting unit 132 may generate the audio signal Sy by increasing the acoustic component corresponding to the frequency band below the predetermined frequency f2 in the audio signal Sx.

In the above, the configuration in which the adjusting unit 132 increases the acoustic component corresponding to the frequency band B1 in the audio signal Sx has been described. However, as shown in FIG. 7, instead of the above configuration, the adjusting unit 132 reduces the acoustic component corresponding to the frequency band B2 (an example of the “second frequency band”) of the audio signal Sx. May generate an audio signal Sy with. FIG. 7 illustrates a case where the frequency band B2 is a frequency band lower than the predetermined frequency f3. As illustrated in FIG. 7, in the frequency band below the frequency f3, the signal strength of the audio signal Sy is lower than the signal strength of the audio signal Sx. Therefore, the voice emitted from the sound emitting unit 120 in response to the voice signal Sy is a voice in which the acoustic component corresponding to the frequency band B2 among the acoustic components of the speaker U's voice is reduced.

When the distance between the speaker U and the listener is short, it is considered that the real voice of the speaker U reaches the listener in addition to the sound emitted from the sound emitting unit 120. In this case, among the acoustic components of the speaker U's voice, there is relatively little need to reinforce the acoustic components corresponding to the frequency band that is not difficult for the listener to hear. According to the above configuration, by setting the frequency band that is not difficult for the listener to hear as the frequency band B2, the sound with the reduced acoustic component corresponding to the frequency band B2 is emitted from the sound emitting unit 120. Therefore, it is possible to reduce the possibility that the volume of the voice corresponding to the frequency band B2 among the voices reaching the listener becomes excessively high. Further, among the voices of the speaker U, the voices corresponding to the frequency bands other than the frequency band B2 are emitted from the sound emitting unit 120. Therefore, it is possible to reinforce the real voice of the speaker U for the frequency band. That is, according to the above configuration, by setting the frequency f3 to, for example, 2 kHz, the voice of the speaker U is reinforced for the frequency band that is difficult for the elderly to hear, and the listener (for the other frequency bands). It is possible to emit a sound that is not offensive to the ears of the elderly).

Note that FIG. 7 illustrates a case where the acoustic component corresponding to a frequency band other than the frequency band B2 is maintained. However, the adjusting unit 132 may generate the audio signal Sy by reducing the acoustic component corresponding to the frequency band B2 and increasing the acoustic component corresponding to the frequency band other than the frequency band B2. That is, the configuration described with reference to FIGS. 5 and 6 and the configuration described with reference to FIG. 7 may be combined.

2. Second Embodiment
The second embodiment of the present disclosure will be described below. For the elements whose actions or functions are the same as those of the first embodiment in each of the embodiments exemplified below, the reference numerals used in the description of the first embodiment will be diverted and detailed description of each will be omitted as appropriate.

FIG. 8 is a block diagram of the audio device 10 according to the second embodiment. The audio device 10 of the second embodiment has an adjustment unit 132A including a direction control unit 134 (an example of the “first direction control unit”) instead of the adjustment unit 132. The configuration other than the adjusting unit 132A is the same as that of the audio device 10 of the first embodiment. The adjusting unit 132A controls the directivity of the audio signal Sx and adjusts the acoustic component described in the first embodiment (hereinafter, may be referred to as a component adjusting process) to obtain the audio signal. Generate Sy.

In the second embodiment, the sound collecting unit 110 is composed of a plurality of sound collecting devices (microphone arrays). The plurality of sound collecting devices collect the voice of the speaker U to generate a voice signal Sx of a plurality of channels. The direction control unit 134 controls the directivity of the sound collecting unit 110 so that the sound collecting unit 110 has directivity in the target direction. Here, the target direction is, for example, the direction of the mouth of the speaker U. Specifically, the direction control unit 134 estimates the direction of the sound source (speaker U's mouth) from the multi-channel audio signals Sx generated by the sound collecting unit 110 after the sound device 10 is turned on. The process (referred to as direction estimation process) is repeated at predetermined time intervals. Then, the direction control unit 134 forms a sound collection beam (a region having high sound collection sensitivity) in the direction estimated by the last executed direction estimation process from the audio signals Sx of the plurality of channels. In other words, the direction control unit 134 generates a signal in which the sensitivity of sound collection with respect to the target direction is increased, that is, a signal in which the acoustic component arriving from the target direction is emphasized. The adjustment unit 132A generates an audio signal Sy by executing the same component adjustment processing as in the first embodiment on the signal generated by the direction control unit 134.

As described above, in the present embodiment, the direction estimation process is repeated. Therefore, even if the direction of the sound source with respect to the sound collecting unit 110 (that is, the target direction) changes with the passage of time, the directivity of the sound collecting unit 110 is automatically controlled so as to face the target direction. As a result, it is possible to maintain a high sensitivity of the sound collecting unit 110 to the voice of the speaker U.

In the above description, the case where the direction estimation process is repeatedly executed has been described as an example, but the direction estimation process may be executed once when the power of the audio device 10 is turned on. In this configuration, since the direction estimation process is executed only once, there is an advantage that the processing load of the control unit 130 (direction control unit 134) is reduced.

According to the present embodiment, the same effect as that of the first embodiment is achieved. Further, in the present embodiment, the directivity of the sound collecting unit 110 is controlled so that the sound collecting unit 110 has directivity in the direction of the speaker U. Therefore, even when the voice emitted by the speaker U is small, it is possible to collect the voice.

3. 3. Third Embodiment FIG. 9 is a block diagram of the audio device 10 according to the third embodiment. The audio device 10 of the third embodiment includes a sensor 150 in addition to the elements described in the first embodiment. Further, the control unit 130 of the third embodiment includes a detection unit 136 that detects the direction of the listener (an example of the "sound emission target"), and also includes an adjustment unit 132B instead of the adjustment unit 132 of the first embodiment. .. The adjusting unit 132B includes a direction control unit 138 (an example of a “second direction control unit”) that controls the directivity of the sound emitting unit 120. Further, in the third embodiment, the sound emitting unit 120 is composed of a plurality of sound emitting devices (speaker arrays).

The sensor 150 is a detection device (for example, a motion sensor or a camera) that detects the position of the listener. The sensor 150 outputs the detection signal K continuously or at predetermined time intervals after the power of the audio device 10 is turned on. The detection unit 136 detects the direction of the listener with respect to the sound emitting unit 120 based on the detection signal K output by the sensor 150, and outputs a detection signal D indicating the direction. The direction detection by the detection unit 136 and the output of the detection signal D are repeatedly executed at predetermined time intervals. The direction control unit 138 controls the directivity of the sound emitting unit 120 so as to have directivity in the direction indicated by the detection signal D. Specifically, the direction control unit 138 directs the direction toward the listener by using the signal whose acoustic component is adjusted by the same component adjustment process as in the first embodiment and the detection signal D finally output. The audio signal Sy is generated so that the sound beam having the property is formed by the sound emitting unit 120.

According to the present embodiment, the same effect as that of the first embodiment is achieved. Further, in the present embodiment, the direction of the listener is repeatedly detected, and the sound emitting unit 120 is automatically controlled so that the sound emitting unit 120 has directivity in the direction of the listener based on the latest detection result. Therefore, even if the position of the speaker U with respect to the listener changes with the passage of time, the sound can be appropriately emitted to the listener.

4. Fourth Embodiment FIG. 10 is a block diagram of an audio device 10 according to a fourth embodiment. As shown in FIG. 10, the sound device 10 of the fourth embodiment includes a communication unit 140 and a sound emitting unit 170 in addition to the elements described in the first embodiment. In the present embodiment, the communication unit 140 and the sound emitting unit 170 are provided on the mounting member 100 integrally with other elements such as the sound emitting unit 120. The communication unit 140 includes a transmission unit 142 and a reception unit 144. Further, the control unit 130 of the fourth embodiment includes a switching unit 160 in addition to the adjusting unit 132. The sound device 10 of the fourth embodiment is in either an operation mode of emitting sound from the sound emitting unit 120 or a communication mode of communicating with another sound device 10b via the communication unit 140. Operate. The operation mode of the sound device 10 is switched by the operation of the user (speaker U) of the sound device 10.

The operation of the audio device 10 will be described with reference to FIG. FIG. 11 is a flowchart of processing of the control unit 130 in the fourth embodiment. In step St1, the control unit 130 acquires the audio signal Sx generated by the sound collecting unit 110. The switching unit 160 switches the supply destination of the acquired audio signal Sx according to the current operation mode of the audio device 10. Specifically, the switching unit 160 determines whether the sound device 10 is operating in the sound emission mode or the communication mode (St2). When the sound device 10 is operating in the sound emission mode, the switching unit 160 supplies the audio signal Sx to the adjusting unit 132 (St3). The adjusting unit 132 generates an audio signal Sy by adjusting the audio signal Sx (St4), and supplies the audio signal Sy to the sound emitting unit 120 (St5). The sound emitting unit 120 emits sound according to the supplied voice signal Sy. As can be seen from the above description, the operation of the sound device 10 in the sound emission mode is the same as the operation described in the first embodiment except for the operation of the switching unit 160 in the control unit 130.

On the other hand, when it is determined in step St2 that the audio device 10 is operating in the communication mode, the switching unit 160 supplies the audio signal Sx to the transmission unit 142 (St6). The transmission unit 142 transmits the supplied audio signal Sx to another audio device 10b by wireless communication.

In the communication mode, the receiving unit 144 of the communication unit 140 receives the audio signal Sz transmitted by wireless communication from the other audio device 10b. The voice signal Sz is a signal representing the voice of a user of another sound device 10b (a speaker wearing another sound device 10b). The audio signal Sz received by the receiving unit 144 is supplied to a sound emitting unit 170 provided separately from the sound emitting unit 120 in the communication mode, and the sound emitting unit 170 emits a sound corresponding to the audio signal Sz. The sound emitting portion 170 is provided, for example, in the vicinity of one end or both ends of the curved portion 106 of the mounting member 100. In other words, the sound emitting unit 170 is arranged below one or both ears of the speaker U.

As understood from the above description, in the present embodiment, the sound collecting unit 110 is used in both the sound emitting mode and the communication mode. In this way, the sound collecting unit 110 is shared between different operation modes. Therefore, the structure of the sound device 10 is simple as compared with the case where the sound collecting unit 100 is separately provided for each of the different operation modes. As a result, the manufacturing cost of the audio device 10 can be reduced.

According to the present embodiment, the same effect as that of the first embodiment is achieved. Further, the audio device 10 of the present embodiment can communicate with another audio device 10b via the communication unit 140. Therefore, for example, when a staff member who is a caregiver wears the sound device 10 in a care facility, the caregiver can be a listener (for example, an elderly person who is a care recipient) by setting the sound device 10 in the sound emission mode and using the sound device 10. Can assist hearing. Further, by setting the sound device 10 in the communication mode and using it, the staff can communicate with another staff (caregiver) who wears the other sound device 10b. Therefore, for example, the convenience of the sound device for the caregiver is improved as compared with the case where another communication device must be carried separately in addition to the device for assisting the hearing of the listener.

5. Fifth Embodiment
FIG. 12 is a block diagram of the information providing system 1 according to the fifth embodiment. The information providing system 1 is a system for providing information on the utterance content of the voice of the speaker U. The information providing system 10 includes an audio device 10, an information management device 20, a terminal device 30, and an information analysis device 40. In addition to the elements described in the first embodiment, the sound device 10 of the fifth embodiment includes a communication unit 180 that wirelessly communicates with another device via, for example, a mobile communication network or a communication network 50 including the Internet and the like. The information management device 20, the terminal device 30, and the information analysis device 40 are each connected to the communication network 50 by wire or wirelessly. Note that FIG. 12 illustrates a case where these devices are connected to the communication network 50 by wire. The information management device 20 is, for example, a server (typically a web server), and includes a storage unit 22 that stores information received by the information management device 20 via the communication network 50. The terminal device 30 is, for example, an information processing terminal such as a personal computer or a smartphone used by the speaker U, and includes a display unit 32 that displays information received by the terminal device 30 via the communication network 50. The information analysis device 40 is, for example, a server (typically a web server), and is a voice analysis unit 42 that executes a known voice recognition process on a voice signal received by the information analysis device 40 via the communication network 50. Be prepared.

As illustrated in FIG. 12, in the sound device 10 of the fifth embodiment, the audio signal Sx generated by the sound collecting unit 110 is supplied to the control unit 130 and the communication unit 180. Since the adjustment and sound emission of the audio signal Sx supplied to the control unit 130 (adjustment unit 132) are the same as those in the first embodiment, the description thereof will be omitted. When the audio signal Sx is supplied to the communication unit 180, the communication unit 180 wirelessly transmits the audio signal Sx to the information analysis device 40 via the communication network 50. The transmission of the acoustic signal Sx by the communication unit 180 and the adjustment by the adjustment unit 132 are performed in parallel. That is, in the present embodiment, the audio signal Sx is transmitted to the information analysis device 40 in real time.

When the information analysis device 40 receives the voice signal Sx, the voice analysis unit 42 generates a character string (hereinafter, referred to as a utterance character string) indicating the utterance content of the voice represented by the voice signal Sx by voice recognition for the voice signal Sx. Identify. The information analysis device 40 transmits the utterance character string specified by the voice analysis unit 42 to the information management device 20 via the communication network 50. The storage unit 22 stores the utterance character string received by the information management device 20.

The voice analysis unit 42 may specify the utterance character string and the information analysis device 40 may transmit the utterance character string in real time or at a predetermined timing. The predetermined timing may be, for example, a predetermined time or a predetermined time interval.

The information management device 20 uses the communication network 50 as a trigger for a predetermined event (for example, the arrival of a predetermined time or the reception of a request from the terminal device 30) to transmit the utterance character string stored in the storage unit 22 to the terminal device. Send to 30. As described above, the information management device 20 of the present embodiment functions together with the sound device 10 as an information management system 5 that manages information regarding the utterance content of the speaker U. When the terminal device 30 receives the utterance character string, the display unit 32 displays the utterance character string.

According to the present embodiment, the same effect as that of the first embodiment is achieved. Further, according to the present embodiment, the utterance character string representing the utterance content of the speaker U is displayed on the display unit 32 of the terminal device 30. For example, in a care facility, it is assumed that at the end of the day, the staff (caregiver) prepares a daily report based on the content of the dialogue with the care recipient. Here, when the speaker U, who is a caregiver, interacts with a plurality of care recipients in one day, the content of the dialogue with each of the plurality of care recipients is remembered later (at the end of the day). It is considered difficult. According to the above configuration, since the speaker U can confirm his / her own utterance content on the terminal device 30 at the end of the day, the work burden of the speaker U can be reduced. The information providing system 1 may further include a document creation unit that creates a document using the utterance character string stored in the storage unit 22. The document generation unit automatically creates, for example, a daily report.

A person other than the speaker U may use the utterance character string stored in the storage unit 22. For example, suppose that the manager of a long-term care facility confirms the utterance content of each staff member (speaker U who is a caregiver) in order to manage the quality of the service provided. In this case, the administrator can confirm the utterance content of each speaker U by displaying the utterance character string corresponding to each utterance content of the plurality of staff members (speaker U) on the terminal device 30. Therefore, as compared with the case where the manager accompanies each staff member and confirms the utterance content of the staff member, the burden on the manager's work is reduced.

6. Modification example
Each aspect exemplified above can be variously modified. A specific mode of modification is illustrated below. Two or more embodiments arbitrarily selected from the embodiments exemplified above and the embodiments exemplified below can be appropriately merged to the extent that they do not contradict each other.

(1) In each of the above-described embodiments, as shown in FIG. 1, the mounting member 100 in a mode of being mounted on the neck of the speaker U is illustrated. However, the aspect of the mounting member 100 is not limited to the above examples. For example, the mounting member 100 may be mounted on any of the limbs of the speaker U. For example, the mounting member 100 may be molded into a bracelet type or an armband type. According to this aspect, the speaker U can easily attach / detach the sound device 10.

Further, the mounting member 100 may be mounted on the face or head of the speaker U. For example, the mounting member 100 may be molded into a headset type, a glasses type, or a shape that can be fixed to a mask. Specifically, the mounting member 100 is formed so as to be fixed to the mask by, for example, hooking on the mask or sandwiching the mask, the sound collecting portion 110 is arranged so as to be located inside the mask, and the sound emitting portion 120 is It is placed so that it is located outside the mask. According to this aspect, as in the first embodiment, the adjusted voice is emitted from a position close to the mouth of the speaker U, so that a natural dialogue between the speaker U and the listener is realized. ..

(2) In each of the above-described aspects, the sound device 10 may operate in either a male voice mode or a female voice mode. The voice quality mode of the sound device 10 is switched by the operation of the user (speaker U) of the sound device 10.

In general, the frequency band of a person's voice, which is rich in acoustic components, differs depending on the person's gender. For example, it is generally considered that a female voice is richer in acoustic components in a high frequency band than a male voice. Therefore, for example, in order to reinforce the voice of the female speaker U, it is assumed that it is preferable to increase the acoustic component in a relatively low frequency band. Therefore, in this embodiment, the frequency band B1 that increases the acoustic component of the audio signal Sx is made different according to the gender of the speaker U. Specifically, when the sound device 10 is operating in the male voice mode, the adjusting unit (132, 132A, or 132B; hereinafter, simply referred to as the adjusting unit 132) has a frequency band in which the lower limit value is the first frequency. Increases the acoustic component of B1. On the other hand, when the acoustic device 10 is operating in the female voice mode, the adjusting unit 132 increases the acoustic component of the frequency band B1 which is the second frequency whose lower limit value is lower than the first frequency. In the above, the case where the lower limit value of the frequency band B1 is different depending on the gender of the speaker U has been illustrated, but the upper limit value may be different.

According to this aspect, since the frequency band for increasing the acoustic component is made different according to the gender of the speaker U, the adjusting unit 132 can make adjustments suitable for the voice quality of the speaker U. More specifically, in this embodiment, among the voices of the speaker U, the voice corresponding to the voice signal Sy in which the acoustic component of the frequency band having a relatively small acoustic component is increased is emitted. Therefore, the effect of each of the above-mentioned aspects of assisting the hearing of the listener is particularly remarkable. When the present modification is applied to the fourth embodiment, the sound device 10 operates in either the male voice mode or the female voice mode in the sound emission mode.

(3) In each of the above-described modes, the adjusting unit 132 may adjust the audio signal Sx when the volume of the sound collected by the sound collecting unit 110 is lower than a predetermined value. Specifically, the adjusting unit 132 determines whether the intensity of the acoustic component corresponding to the specific frequency band (hereinafter referred to as the specific component intensity) among the acoustic components contained in the voice of the speaker U is below a predetermined threshold value. Judge whether or not. The adjusting unit 132 generates an audio signal Sy by adjusting the audio signal Sx so as to increase the specific component intensity when the specific component intensity is below the threshold value, and when the specific component intensity exceeds the threshold value, the audio signal Sy is generated. The audio signal Sy is generated without increasing the acoustic component of the signal Sx. Instead of the above configuration, the adjustment unit 132 may have a different degree of increasing the acoustic component of the audio signal Sx depending on whether the specific component intensity is below the threshold value or above the threshold value. Further, when the intensity of the specific component exceeds the threshold value, the adjusting unit 132 may not generate the audio signal Sy. When the adjusting unit 132 does not generate the audio signal Sy, no sound is emitted from the sound emitting unit 120.

For example, if the voice of speaker U is sufficiently loud, it can be assumed that the need to reinforce the voice of speaker U is relatively low. According to the above configuration, the audio signal Sx is adjusted according to the volume of the sound collected by the sound collecting unit 110. Therefore, when it is highly necessary to reinforce the real voice of the speaker U, it is necessary to reinforce the real voice of the speaker U while the sound for reinforcing the real voice of the speaker U is emitted from the sound emitting unit 120. When the property is low, the volume of the sound emitted from the sound emitting unit 120 can be suppressed to be relatively low. As a result, it is possible to reduce the possibility that the volume of the voice reaching the listener (the mixed sound of the voice of the speaker U and the voice emitted from the sound emitting unit 120) becomes excessively loud.

(4) In each of the above-described modes, the power supply of the audio device 10 may be turned on by the manual operation of the user (speaker U) of the audio device 10, or automatically triggered by another event. May be put in. Here, the "manual operation" may be, for example, the operation of the power switch provided in the sound device 10, the movable sound collecting unit 110 or the movable sound emitting unit 120 provided in the mounting member 100. (For example, the sound collecting unit 110 may be directed toward the mouth of the speaker U). Further, the “other event” means, for example, that a sensor provided in the sound device 10 detects a voice having a predetermined volume or higher while the sound device 10 is attached to the speaker U.

(5) In each of the above-described embodiments, the configuration in which the adjusting unit 132 increases or decreases the acoustic component in a specific frequency band of the audio signal Sx is illustrated. However, the acoustic component adjusted by the adjusting unit 132 is not limited to the acoustic component corresponding to a specific frequency band. The adjusting unit 132 may adjust the overall volume of the audio signal Sx instead of the above-described configuration. Specifically, the adjusting unit 132 according to this modification adjusts the volume of the audio signal Sx according to the volume of the audio signal Sx to generate the audio signal Sy.

In one example of this modification, the adjusting unit 132 adjusts the volume of the audio signal Sx so that the lower the volume of the audio signal Sx, the greater the degree of increase in the volume of the audio signal Sx. For example, in the adjusting unit 132, when the volume of the audio signal Sx is lower than the predetermined volume (referred to as the first volume), the volume of the audio signal Sx exceeds the predetermined volume (referred to as the second volume). In comparison, the volume of the audio signal Sx may be adjusted so that the degree of increase is greater. The second volume is a volume equal to or higher than the first volume. According to this configuration, when the volume of the audio signal Sx is low, the audio signal Sx is adjusted so that the degree of increase in the volume of the audio signal Sx is larger than when the volume of the audio signal Sx is high. As a result, a sound having an appropriate volume is emitted from the sound emitting unit 120 regardless of the volume of the voice of the speaker U.

On the other hand, it can be assumed that the speaker U intentionally speaks in a small voice, such as when the speaker U who is a caregiver speaks in a low voice to the listener who is a care recipient. Therefore, in another example of this modification, the adjusting unit 132 may adjust the volume of the audio signal Sx so that the smaller the volume of the audio signal Sx, the smaller the degree of increase in the volume of the audio signal Sx. Good. For example, when the volume of the audio signal Sx is lower than the first volume, the adjusting unit 132 makes the sound so that the degree of increase is smaller than when the volume of the audio signal Sx is higher than the second volume. The volume of the signal Sx may be adjusted. According to this configuration, a sound having a volume in line with the intention of the speaker U is emitted from the sound emitting unit 120.

In addition, the above-mentioned two configuration examples of this modification may be combined. For example, when the voice of the speaker U is a whisper, the adjusting unit 132 increases the volume of the voice signal Sx so that the lower the volume of the voice signal Sx, the smaller the increase in the volume of the voice signal Sx. To adjust. On the other hand, when the voice of the speaker U is not a whisper, the volume of the voice signal Sx is adjusted so that the lower the volume of the voice signal Sx, the greater the degree of increase in the volume of the voice signal Sx. In the above configuration, the adjusting unit 132 adjusts the audio signal Sx according to the volume and quality of the audio signal Sx. The adjusting unit 132 determines whether or not the voice of the speaker U is a whisper, using, for example, the clarity of the wave tuning structure of the voice signal Sx as an index.

In the above, the configuration in which the adjusting unit 132 adjusts the volume of the audio signal Sx according to the volume of the audio signal Sx has been illustrated, but the adjusting unit 132 has a predetermined amplification factor (gain) regardless of the volume of the audio signal Sx. ) May increase the volume of the audio signal Sx.

(6) In the third embodiment, the configuration in which the detection unit 136 detects the direction of the listener is illustrated. However, the detection unit 136 may detect the distance from the sound device 10 to the listener in addition to the direction of the listener. The detection unit 136 detects the distance by analyzing the output signal of a distance measuring sensor such as a distance image sensor. Further, the adjusting unit 132 may adjust the audio signal Sx according to the distance detected by the detecting unit 136 (hereinafter, referred to as a sound emitting distance). For example, in this modification, the shorter the sound emission distance, the smaller the degree to which the adjustment unit 132 increases the acoustic component corresponding to the frequency band B1 in the audio signal Sx. According to this configuration, the sound emission distance is detected, and the sound corresponding to the sound signal Sy generated according to the sound release distance is emitted. For this reason, the volume of the voice reaching the listener becomes excessively low or excessively loud as compared with the case where the voice corresponding to the uniformly generated voice signal Sy is emitted regardless of the sound emission distance. The possibility can be reduced.

When this modification is combined with the above-mentioned modification 5, the adjusting unit 132 adjusts the volume of the audio signal Sx so that the shorter the sound emission distance, the smaller the degree of increase in the volume of the audio signal Sx.

Further, in the present modification, the detection unit 136 may first detect the position of the listener from the detection signal K output from the sensor 150, and detect the direction of the listener and the sound emission distance based on the detected position. ..

(7) In the third embodiment, the embodiment in which the audio device 10 includes the sensor 150 and the detection unit 136 is illustrated, but these elements may be omitted. In the configuration in which the sensor 150 and the detection unit 136 are omitted, the direction control unit 138 determines the directivity of the sound emitting unit 120 so as to have directivity in the direction specified by the user (speaker U) of the sound device 10, for example. Control. According to this configuration, since the directivity of the sound emitting unit 120 can be controlled, the speaker U can emit sound in any direction.

(8) In the fourth embodiment, the configuration in which the sound emitting unit 170 is provided on the mounting member 100 integrally with other elements (for example, the sound collecting unit 110 and the sound emitting unit 120) included in the sound device 10 is illustrated. However, the sound emitting unit 170 may be provided as a separate body from the mounting member 100. For example, the sound emitting unit 170 may be composed of wired or wireless earphones. According to this configuration, the sound emitted from the sound emitting unit 170 (that is, the speaker of the other sound device 10b) is hard to be heard by a person other than the speaker U.

(9) In the fourth embodiment, the switching unit 160 supplies the audio signal Sx output from the sound collecting unit 110 to either the adjusting unit 132 or the transmitting unit 142 according to the operation mode of the audio device 10. The configuration is illustrated. However, the switching unit 160 may supply the audio signal Sx to each of the adjusting unit 132 and the transmitting unit 142 in the communication mode. In the present modification, in the communication mode, the generation of the voice signal Sy, the sound generation of the voice from the sound emitting unit 120, and the transmission of the voice signal Sx from the transmission unit 142 are executed in parallel.

(10) In the fifth embodiment, the configuration in which the audio signal Sx generated by the sound collecting unit 110 is transmitted to the information analysis device 40 in real time is illustrated. However, the audio signal Sx may be temporarily stored in, for example, a storage unit provided in the audio device 10 and transmitted to the information analysis device 40 at a predetermined time interval or triggered by a predetermined event. The predetermined event may be, for example, an operation of the speaker U instructing the transmission of the audio signal Sx, or may be the arrival of a predetermined time.

(11) In the fifth embodiment, the configuration in which the storage unit 22 for storing the utterance character string is provided outside the sound device 10 is illustrated, but the storage unit 22 may be provided inside the sound device 10.
Further, in the fifth embodiment, the configuration in which the voice analysis unit 42 is provided in the information analysis device 40 is illustrated, but the voice analysis unit 42 is inside the information management system 5 (for example, the sound device 10 or the information management device 20). It may be provided or may be provided in the terminal device 30.

(12) When the fourth embodiment and the fifth embodiment are combined, the communication unit 180 may be omitted because the communication unit 140 also serves as the communication unit 180. In this case, in the sound emission mode, the switching unit 160 supplies the audio signal Sx to each of the adjusting unit 132 and the transmitting unit 142, and the transmitting unit 142 transmits the audio signal Sx to the information analysis device 40.

(13) In each of the above-described embodiments, a case where the sound device 10 is used by a speaker U who is a caregiver in a care facility is illustrated. However, the scene where the audio device 10 is used is not limited to the above examples. The sound device 10 can be used in any situation where it is preferable to assist the listener's hearing. For example, at a counter in various facilities (for example, government offices, banks, post offices, hospitals, pharmacies, and retail stores), a staff member or a clerk may wear the sound device 10 and use it for dialogue with a visitor. A doctor or a nurse may wear the sound device 10 in a medical institution and use it for dialogue with a patient. Further, the practitioner may wear the acoustic device 10 at the osteopathic clinic or the acupuncture clinic and use it for dialogue with the patient.

(14) From the above-exemplified form, for example, the following configuration can be grasped.

<Aspect 1>
The sound device according to one aspect (aspect 1) of the present disclosure includes a sound collecting unit that collects a speaker's sound and generates a first signal, and a sound collecting unit that generates a second signal by adjusting the first signal. The adjusting unit, the sound emitting unit that emits the sound corresponding to the second signal in the direction away from the speaker, the sound collecting unit, the adjusting unit, and the sound emitting unit are integrally provided. It includes a mounting member to be mounted on the speaker. In the above aspect, since the sound collecting unit, the adjusting unit, and the sound emitting unit are integrally provided on the mounting member, it is possible to assist the hearing of the listener while improving the usability for the speaker who wears the audio device. It is possible.

<Aspect 2>
In a specific example of aspect 1 (aspect 2), the mounting member is mounted on either the speaker's limbs or neck. In the above aspect, when the wearing member is worn around the neck, the adjusted voice is emitted from a position close to the speaker's mouth, so that a natural dialogue between the speaker and the listener is realized. Further, when the mounting member is mounted on any of the speaker's limbs, there is an advantage that the audio device can be easily attached and detached.

<Aspect 3>
In a specific example of aspect 1 (aspect 2), the mounting member is mounted on the speaker's face. In the above aspect, since the adjusted voice is emitted from a position close to the speaker's mouth, a natural dialogue between the speaker and the listener is realized.

<Aspect 4>
The sound device according to another aspect (aspect 4) of the present disclosure includes a sound collecting unit that collects sound and generates a first signal, and an adjusting unit that generates a second signal by adjusting the first signal. A sound emitting unit that emits a sound corresponding to the second signal, a sound collecting unit, an adjusting unit, and a mounting member integrally provided with the sound collecting unit are provided, and the sound collecting unit is provided. The direction of sound collection by the unit and the direction of sound emission by the sound emitting unit are different. In the above aspect, since the sound collecting unit, the adjusting unit, and the sound emitting unit are integrally provided on the mounting member, it is possible to assist the hearing of the listener while improving the usability for the speaker who wears the audio device. It is possible.

In a specific example of the fourth aspect (aspect 5), the mounting member includes a first surface and a second surface facing the same direction, the sound collecting portion is provided on the first surface, and the sound emitting portion is provided. It is provided on the second surface.

<Aspect 6>
In any specific example (aspect 6) of any one of aspects 1 to 5, the audio device further includes a first-direction control unit that controls the directivity of the sound collecting unit. In the above aspect, since the directivity of the sound collecting unit can be controlled, by controlling the sound collecting unit so as to have directivity in the direction of the speaker, the sound is collected even if the voice emitted by the speaker is small. can do.

<Aspect 7>
In any specific example (aspect 7) of any one of aspects 1 to 6, the audio device further includes a second direction control unit that controls the directivity of the sound emitting unit. In the above aspect, since the directivity of the sound emitting unit can be controlled, the sound can be emitted in an arbitrary direction (for example, the direction of the listener).

<Aspect 8>
In the specific example of the seventh aspect (aspect 8), the sound device further includes a detection unit that detects the direction in which the listener is located, and the second direction control unit has directivity in the direction detected by the detection unit. The directivity of the sound emitting unit is controlled. In the above aspect, since the direction to be emitted is automatically detected and controlled, the speaker does not need to manually adjust the direction of sound emission. As a result, the usability of the audio device for the speaker is further improved.

<Aspect 9>
In any specific example (aspect 9) of aspects 1 to 8, the adjusting unit generates the second signal by increasing the acoustic component corresponding to the first frequency band of the first signal. .. In the above aspect, it is difficult to hear the sound in the first frequency band because the voice in which the acoustic component corresponding to the first frequency band (for example, high frequency) of the speaker's voice is increased is emitted. It is possible to emit a sound that is easy for a listener to hear.

<Aspect 10>
In any specific example (aspect 10) of aspects 1 to 9, the adjusting unit generates the second signal by reducing the acoustic component corresponding to the second frequency band of the first signal. .. In the above aspect, since the voice in which the acoustic component corresponding to the second frequency band (for example, low frequency) of the speaker's voice is reduced is emitted, the volume of the voice in the second frequency band is excessive. The possibility of becoming large can be reduced. Further, it is possible to reinforce the acoustic component corresponding to a frequency band other than the second frequency band in the speaker's real voice.

<Aspect 11>
In any specific example (aspect 11) of any one of aspects 1 to 8, the adjusting unit adjusts the volume of the first signal according to the volume of the first signal to generate the second signal. In the above aspect, since the first signal is adjusted according to the volume of the first signal, it is possible to emit a voice according to the volume of the speaker's voice.

<Aspect 12>
In any specific example (aspect 12) of any one of aspects 1 to 10, the sound device further includes a transmission unit that transmits the supplied first signal to another sound device, and is generated by the sound collection unit. It operates in either a sound emission mode in which the first signal is supplied to the adjusting unit or a communication mode in which the first signal is supplied to the transmitting unit. In the above aspect, since the sound collecting unit is shared between the sound emitting mode and the communication mode, the structure of the audio device is simple as compared with the case where the sound collecting unit is separately provided for each of the different modes. .. As a result, the manufacturing cost of the audio device can be reduced.

<Aspect 13>
The information management system according to the specific aspect (aspect 13) of the present disclosure is specified by the acoustic device according to any one of aspects 1 to 12 and voice recognition for the first signal generated by the sound collecting unit. It is provided with a storage unit for storing the character string. In the above aspect, since the character string representing the utterance content of the speaker is stored, the speaker can confirm his / her own utterance content later.

1 ... Information providing system, 5 ... Information management system, 10 ... Sound device, 20 ... Information management device, 22 ... Storage unit, 100 ... Mounting member, 110 ... Sound collecting unit, 120 ... Sound emitting unit, 132 ... Adjusting unit, 134 ... Direction control unit (first direction control unit), 136 ... Detection unit, 138 ... Direction control unit (second direction control unit), 142 ... Transmission unit, 144 ... Reception unit, 170 ... Sound emission unit, Sx ... Sound Signal (first signal), Sy ... Voice signal (second signal), U ... Speaker.

5. Fifth Embodiment
FIG. 12 is a block diagram of the information providing system 1 according to the fifth embodiment. The information providing system 1 is a system for providing information on the utterance content of the voice of the speaker U. The information providing system 1 includes an audio device 10, an information management device 20, a terminal device 30, and an information analysis device 40. In addition to the elements described in the first embodiment, the sound device 10 of the fifth embodiment includes a communication unit 180 that wirelessly communicates with another device via, for example, a mobile communication network or a communication network 50 including the Internet and the like. The information management device 20, the terminal device 30, and the information analysis device 40 are each connected to the communication network 50 by wire or wirelessly. Note that FIG. 12 illustrates a case where these devices are connected to the communication network 50 by wire. The information management device 20 is, for example, a server (typically a web server), and includes a storage unit 22 that stores information received by the information management device 20 via the communication network 50. The terminal device 30 is, for example, an information processing terminal such as a personal computer or a smartphone used by the speaker U, and includes a display unit 32 that displays information received by the terminal device 30 via the communication network 50. The information analysis device 40 is, for example, a server (typically a web server), and is a voice analysis unit 42 that executes a known voice recognition process on a voice signal received by the information analysis device 40 via the communication network 50. Be prepared.

In addition, the above-mentioned two configuration examples of this modification may be combined. For example, the adjustment unit 132, when the voice of the speaker U is whisper is, the more the volume of the audio signal Sx is small, adjusts the volume of the audio signal Sx as the degree of increase in the volume of the audio signal Sx is reduced To do. On the other hand, when the voice of the speaker U is not a whisper, the volume of the voice signal Sx is adjusted so that the lower the volume of the voice signal Sx, the greater the degree of increase in the volume of the voice signal Sx. In the above configuration, the adjusting unit 132 adjusts the audio signal Sx according to the volume and quality of the audio signal Sx. The adjusting unit 132 determines whether or not the voice of the speaker U is a whisper, using, for example, the clarity of the wave tuning structure of the voice signal Sx as an index.

Claims (13)

A sound collecting unit that collects the speaker's voice and generates the first signal,
An adjusting unit that generates a second signal by adjusting the first signal, and
A sound emitting unit that emits a sound corresponding to the second signal in a direction away from the speaker, and a sound emitting unit.
A mounting member that is integrally provided with the sound collecting portion, the adjusting portion, and the sound emitting portion and is mounted on the speaker.
An audio device equipped with. The mounting member is mounted on either the speaker's limbs or neck.
The audio device according to claim 1. The mounting member is mounted on the speaker's face.
The audio device according to claim 1. A sound collecting unit that collects sound and generates the first signal,
An adjusting unit that generates a second signal by adjusting the first signal, and
A sound emitting unit that emits sound corresponding to the second signal, and
The sound collecting unit, the adjusting unit, and a mounting member on which the sound emitting unit is integrally provided are provided.
An audio device in which the direction of sound collection by the sound collecting unit and the direction of sound generation by the sound emitting unit are different. The mounting member includes a first surface and a second surface that face each other in the same direction.
The sound emitting portion is provided on the first surface, and is provided on the first surface.
The sound collecting portion is provided on the second surface, and is provided on the second surface.
The audio device of claim 4. A first-direction control unit that controls the directivity of the sound collecting unit is further provided.
The audio device according to any one of claims 1 to 5. A second direction control unit that controls the directivity of the sound emitting unit is further provided.
The audio device according to any one of claims 1 to 6. It also has a detector that detects the direction in which the listener is located.
The second direction control unit controls the directivity of the sound emitting unit so as to have directivity in the direction detected by the detection unit.
The acoustic device according to claim 7. The adjusting unit generates the second signal by increasing the acoustic component corresponding to the first frequency band of the first signal.
The audio device according to any one of claims 1 to 6. The adjusting unit generates the second signal by reducing the acoustic component corresponding to the second frequency band of the first signal.
The audio device according to any one of claims 1 to 7. The adjusting unit generates the second signal by adjusting the volume of the first signal according to the volume of the first signal.
The audio device according to any one of claims 1 to 8. Further, a transmitter for transmitting the supplied first signal to another audio device is provided.
The audio device operates in either a sound emitting mode in which the first signal generated by the sound collecting unit is supplied to the adjusting unit or a communication mode in which the first signal is supplied to the transmitting unit.
The audio device according to any one of claims 1 to 11. The audio device according to any one of claims 1 to 12,
A storage unit that stores a character string specified by voice recognition for the first signal generated by the sound collecting unit, and a storage unit.
Information management system equipped with.

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