JP2022156714A - headset system - Google Patents

Abstract

To determine a mounting state of a headset.SOLUTION: A headset system comprises: a hollow housing to be mounted on the ear of a user; a cylindrical-shaped external auditory canal insertion part being a part of the housing and arranged in a part on an external auditory canal side of the housing; a microphone arranged inside the housing; a headset including an analysis section for analyzing biological information from a signal output from the microphone, so as to output the information; and an information processing section 50 including an input section 60 for receiving the biological information output from the headset and a visualization section 76 for visualizing the biological information in order to determine a mounting state of the headset.SELECTED DRAWING: Figure 4

Description

The present invention relates to headset systems.

Conventionally, techniques for extracting heartbeats from sounds in the ear canal have been known (for example, Non-Patent Documents 1 and 2).

For example, in Non-Patent Document 1, an earplug-like device is worn, and from the body vibration obtained by detecting changes in the internal pressure of the external auditory canal with a low-frequency pressure sensor, the jugular vein pressure fluctuation component is extracted and noninvasively detected. A measurement method for analyzing cardiac function is disclosed.

Non-Patent Document 2 discloses an earphone-type sensor capable of measuring a heart rate by analyzing a heart pressure signal using a data processing program.

Nobuyuki Terada, "Non-invasive examination of right heart function from the ear canal", Toyo University Research Seeds Collection 2017-2018 Ai Tayama et al., "Development and Accuracy of Earphone-type Small Biometric Information Sensor", Showa Gakushi Gakushi, Vol. 74, No. 1, pp. 60-66, 2014

As described above, the prior art discloses analyzing biological information using an earphone-type sensor, but does not consider determining the wearing state of the earphone.

SUMMARY OF THE INVENTION An object of the present invention is to provide a headset system capable of determining the wearing state of the headset.

A headset system according to a first invention analyzes and outputs biological information from a hollow housing worn on the ear of a user, a microphone provided inside the housing, and a signal output from the microphone. a headset including an analysis unit; an information processing unit including an input unit that receives the biological information output from the headset; and a visualization unit that visualizes the biological information to determine the wearing state of the headset; is composed of

According to the first invention, the analysis unit of the headset analyzes and outputs biological information from the signal output from the microphone. Then, the input section of the information processing section receives the biometric information output from the headset, and the visualization section visualizes the biometric information for determining the wearing state of the headset.

In this way, biological information is analyzed and output from the signal output from the microphone of the headset, and the visualization unit of the information processing unit visualizes the biological information in order to determine the wearing state of the headset. The wearing state of the headset can be determined.

A headset system according to a second invention analyzes biological information from a hollow housing worn on the ear of a user, a photodetector provided inside the housing, and a signal output from the photodetector. an input unit that receives the biological information output from the headset; and a visualization unit that visualizes the biological information to determine the wearing state of the headset. and a processing unit.

According to the second invention, the analysis section of the headset analyzes and outputs biological information from the signal output from the light detection section. Then, the input section of the information processing section receives the biometric information output from the headset, and the visualization section visualizes the biometric information for determining the wearing state of the headset.

In this way, biological information is analyzed and output from the signal output from the light detection unit of the headset, and the biological information is visualized by the visualization unit of the information processing unit in order to determine the wearing state of the headset. , the wearing state of the headset can be determined.

A photodetector according to a second aspect of the invention is a photoplethysmograph for measuring a photoplethysmogram.

The information processing unit according to the above invention further includes a determination unit that determines the wearing state of the headset based on the biological information, and the visualization unit visualizes the biological information and the determination result by the determination unit. can do.

The information processing unit according to the above invention detects peaks and bottoms from the waveform of the signal as the biometric information received by the input unit, and the detected peaks and bottoms are estimated to be erroneous detections. It further includes a biological information analysis unit that removes peaks and bottoms and calculates a heart rate based on the removed peaks and bottoms, wherein the determination unit determines the number of detected peaks and bottoms and the number of removed peaks and bottoms. can be used to determine the wearing state.

The analysis unit according to the above invention can apply a low-pass filter to the output signal and output the biological information obtained by amplifying the signal.

The headset according to the above invention may further include a tubular ear canal insertion portion which is a part of the housing and provided in a portion of the housing on the side of the ear canal.

As described above, according to the headset system of the present invention, biometric information is analyzed and output from the signal output from the microphone or the light detection unit of the headset, and the visualization unit of the information processing unit outputs the By visualizing the biometric information to determine the wearing state of the headset, the wearing state of the headset can be determined.

FIG. 4 is a diagram showing an example of waveforms of signals output from a microphone; 1 is a sectional view showing the overall configuration of a headset according to a first embodiment of the invention; FIG. FIG. 3 is a block diagram showing a computing section of the headset according to the first embodiment of the present invention; FIG. 3 is a block diagram showing the configuration of an information processing section according to the first embodiment of the present invention; FIG. FIG. 4 is a diagram for explaining a method of detecting temporary peaks and temporary bottoms from the waveform of a signal; FIG. 10 is a diagram for explaining a method of removing provisional peaks and provisional bottoms that are estimated to be erroneously detected; FIG. 10 is a diagram for explaining a method of picking up the missing provisional peaks and provisional bottoms; (A) A diagram showing an example of temporary peaks and temporary bottoms detected from the waveform of a signal, and (B) An example of temporary peaks and temporary bottoms after removing temporary peaks and temporary bottoms that are estimated to be false detections. It is a diagram. (A) A diagram showing an example of temporary peaks and temporary bottoms detected from the waveform of a signal, and (B) An example of temporary peaks and temporary bottoms after removing temporary peaks and temporary bottoms that are estimated to be false detections. It is a diagram. FIG. 10 is a diagram showing an example of visualizing signal waveforms and wearing state scores; 4 is a flow chart showing details of biological information analysis processing by the headset according to the first embodiment of the present invention. FIG. 7 is a flow chart showing the contents of wearing state visualization processing by the information processing unit according to the first embodiment of the present invention; FIG. FIG. 3 is a cross-sectional view showing the overall configuration of a headset according to a second embodiment of the invention; 1 is a cross-sectional view showing the overall configuration of a headset according to an example; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First embodiment]
<Overview of the first embodiment of the present invention>
When obtaining the heartbeat from the sound of the ear canal, it is necessary to detect acoustic vibrations in the ultra-low range (2 to 20 Hz). Such low frequency acoustic vibrations are known to be attenuated if the ear canal is not sealed.

In the first embodiment of the present invention, utilizing this characteristic, the waveform of the signal detected from the ear canal sound acquired by the headset is visualized so that the user can easily grasp the wearing state of the headset. make it possible.

For example, FIGS. 1(A) to 1(C) show respective signal waveforms when the size of the earpiece of the headset is changed. FIG. 1A shows an example in which the headset is worn well and the acoustic vibration in the ultra-low range corresponding to the heartbeat is large compared to noise. FIG. 1C shows an example in which the wearing condition of the headset is not good, and the acoustic vibration in the ultra-low range corresponding to the heartbeat is attenuated and is on the same level as noise. FIG. 1B shows an example in which the wearing condition of the headset is intermediate between good and bad, and the acoustic vibration in the ultra-low range corresponding to the heartbeat is slightly larger than the noise. showing. Thus, it can be seen that the difference between the waveform of the signal corresponding to the heartbeat and the noise varies depending on the wearing state of the headset.

<Configuration of headset system according to first embodiment of the present invention>
A headset system according to a first embodiment of the present invention has a headset 100 shown in FIG.

As shown in FIG. 2, the headset 100 has a hollow housing 10 that is worn on the user's ear and contains various functional components inside. The headset 100 also has a tubular ear canal insertion portion 12 having a hollow portion, which is a part of the housing 10 and is provided in a portion of the housing 10 on the ear canal side when worn on the user's ear. .

The headset 100 also has a driver 14 for sound signal output provided inside the housing 10 .

The headset 100 also includes a microphone 16 provided to collect signals propagating in the hollow portion of the ear canal insertion portion 12, a reproduction portion 20 that outputs sound signals from the driver 14, and biological information from the output of the microphone 16. and a communication unit 23 that receives a sound signal from an information processing unit 50 described later and transmits biological information extracted by the calculation unit 22 to the information processing unit 50 .

The reproduction unit 20 , the calculation unit 22 , and the communication unit 23 are mounted on a main substrate (not shown) arranged inside the housing 10 .

The calculator 22 extracts biometric information from the output of the microphone 16 .

The calculation unit 22 functionally includes an authentication unit 30, an analysis unit 32, and a reproduction control unit 34, as shown in FIG.

The authentication unit 30 identifies the user wearing the headset 100 by ear acoustic authentication using the microphone 16 .

The analysis unit 32 analyzes biological information from the signal output from the microphone 16 and transmits the biological information to the information processing unit 50 through the communication unit 23 .

Specifically, the analysis unit 32 applies a low-pass filter to the signal output from the microphone 16 and outputs the waveform of the ultra-low frequency signal obtained by amplifying the signal as biometric information.

For example, after applying a low-pass filter of 20 Hz to 50 Hz, a fixed gain of 10 to 20 dB is applied to remove the baseline, thereby obtaining an ultra-low frequency signal waveform of 0.1 to 20 Hz or less.

The reproduction control unit 34 controls to output the sound signal received from the information processing unit 50 via the reproduction unit 20 and the driver 14 .

The headset system according to the first embodiment of the invention has an information processing section 50 shown in FIG.

The information processing section 50 is composed of a mobile terminal, a computer terminal, or the like, or the information processing section 50 is incorporated in a headset system. Here, mobile terminals include smartphone terminals, mobile phones, and PDA (Personal Digital Assistants) terminals. Computer terminals include notebook/book computer terminals and desktop computer terminals.

The information processing section 50 is composed of a computer having a CPU, a RAM, and a ROM storing a program for executing a mounting state visualization processing routine, which will be described later, and is functionally configured as follows. there is

As shown in FIG. 4 , the information processing section 50 includes an input section 60 , a computing section 70 and an output section 80 . The calculation unit 70 includes a biological information analysis unit 72 , a determination unit 74 and a visualization unit 76 .

Input unit 60 receives input of biometric information received from headset 100 .

The biometric information analysis unit 72 detects peaks and bottoms from the waveform of the signal as biometric information received by the input unit 60, and removes the peaks and bottoms that are estimated to be erroneously detected among the detected peaks and bottoms. , the heart rate is calculated based on the removed peaks and bottoms.

Specifically, the biological information analysis unit 72 extracts, as temporary peaks, points exceeding the moving average of each upper limit from the waveform of the signal as biological information received by the input unit 60 (see white circles in FIG. 5). ). Also, points below the moving averages of the respective lower limits are extracted as temporary bottoms.

Then, the biological information analysis unit 72 considers the time difference and the amplitude amount from the temporary bottom to the temporary peak, the interval between the effective temporary peaks, and the interval between the effective temporary bottoms, and the temporary peak and the temporary bottom that are estimated to be erroneously detected. (Fig. 6). FIG. 6 shows an example of removing temporary peaks and temporary bottoms that are estimated to be erroneously detected in consideration of the time difference and amplitude amount from the temporary bottoms to the temporary peaks, as indicated by the dotted line.

Then, after removing the provisional peak and the provisional bottom that are estimated to be erroneously detected, if the provisional peak and the provisional bottom determined to be valid are clearly wider than the heartbeat interval, the biological information analysis unit 72 determines that the provisional peak and the provisional bottom are valid. and the interval between effective temporary bottoms, and the temporary peaks and temporary bottoms estimated to be erroneously detected are removed again from the temporary peaks and temporary bottoms before removal (FIG. 7). Thereby, the missing provisional peak and provisional bottom are detected. FIG. 7 again shows an example of the result of removing temporary peaks and temporary bottoms estimated to be erroneously detected, white circles indicating effective temporary peaks and black circles indicating effective temporary bottoms.

Then, the biological information analysis unit 72 calculates the heart rate from the obtained interval between the provisional peak and the provisional bottom.

The determination unit 74 determines the wearing state of the headset 100 based on the biological information. Specifically, the determination unit 74 uses the number of detected peaks and bottoms and the number of removed peaks and bottoms to calculate the heartbeat noise ratio as the wearing state score according to the following equation.

For example, as shown in FIG. 8A, the provisional peak before removal (see the white circle) is 13 points, and the provisional bottom (see the black circle) is 14 points. As shown in B), when 3 points are removed from the pre-removal temporary peak (see white circle) and 3 points are removed from the pre-removal temporary bottom (see black circle), the heartbeat noise ratio QHR=78. %, and a wearing state score indicating that the wearing state of the headset 100 is good is calculated.

Also, as shown in FIG. 9A, the provisional peak before removal (see the white circle) is 30 points, and the provisional bottom (see the black circle) is 29 points. As shown in B), when 20 points are removed from the provisional peak before removal (see the white circle) and 19 points are removed from the provisional bottom before removal (see the black circle), the heartbeat noise ratio QHR=34. %, and a wearing state score is calculated that indicates that the headset 100 is not worn well and that there is leakage.

The visualization unit 76 visualizes the waveform of the signal as the biological information received by the input unit 60 and the wearing state score calculated by the determination unit 74 , and displays the result on the output unit 80 .

For example, as shown in FIG. 10 , the display screen of the information processing section 50 displays the waveform of the signal as the biological information received by the input section 60 and the wearing state score.

While viewing the waveform of the signal displayed on the information processing unit 50, the user can adjust the wearing state of the headset 100 so that the wave height is maximized.

FIG. 10 shows an example in which, in addition to displaying the wearing state score, any one of "good", "acceptable", and "impossible" is displayed as the wearing state by setting a certain threshold value.

It should be noted that the user may be prompted to change the size of the earpiece and re-determine the wearing state according to the display of the wearing state score.

<Operation of the headset system according to the first embodiment of the present invention>
When the housing 10 of the headset 100 is worn on the user's ear and an instruction to determine the wearing state is received from the user's information processing unit 50 by wireless communication, the state shown in FIG. Such biological information analysis processing is executed by the computing unit 22 .

First, in step S<b>100 , the analysis unit 32 applies a low-pass filter to the signal output from the microphone 16 .

In step S102, the analysis unit 32 applies a fixed gain to the result of applying the low-pass filter in step S100 to amplify the signal.

In step S104, the analysis unit 32 obtains the waveform of the ultra-low frequency signal by removing the baseline from the result of applying the fixed gain in step S102.

In step S106, the communication unit 23 transmits the waveform of the signal obtained in step S104 to the information processing unit 50 as biological information, and ends the biological information analysis process.

Then, when the information processing section 50 receives the waveform of the signal as the biological information from the headset 100, the information processing section 50 executes the wearing state visualization processing as shown in FIG.

First, in step S<b>110 , the input unit 60 acquires the waveform of the signal as biological information received from the headset 100 .

In step S112, the biological information analysis unit 72 extracts a temporary peak and a temporary bottom from the upper limit and lower limit of the waveform of the signal as the biological information acquired in step S110.

Then, in step S114, the biological information analysis unit 72 considers the time difference and the amplitude amount from the tentative bottom to the tentative peak, the interval between the effective tentative peaks, and the interval between the effective tentative bottoms, and considers the tentative Remove peaks and false bottoms.

Then, in step S116, the biological information analysis unit 72 detects the temporary peaks and the temporary bottoms that have been omitted in removing the temporary peaks and the temporary bottoms that are estimated to be erroneously detected.

Then, in step S118, the biological information analysis unit 72 calculates the heart rate from the obtained interval between the provisional peak and the provisional bottom.

Then, in step S120, the determination unit 74 uses the number of detected peaks and bottoms and the number of removed peaks and bottoms to calculate the heartbeat noise ratio as the wearing state score.

In step S122, the visualization unit 76 visualizes the waveform of the signal as the biological information received by the input unit 60 and the wearing state score calculated by the determination unit 74, and displays them on the output unit 80 to perform wearing state visualization processing. exit.

As described above, according to the headset system according to the first embodiment of the present invention, biological information is analyzed and output from the signal output from the microphone of the headset, and the visualization unit of the information processing unit By visualizing biological information for determining the wearing state of the headset, the user can determine the wearing state of the headset.

[Second embodiment]
Next, a headset system according to a second embodiment will be described. Parts having the same configuration as in the first embodiment are denoted by the same reference numerals, and descriptions thereof are omitted.

The second embodiment differs from the first embodiment in that biometric information is acquired using photoplethysmograms.

<Overview of Second Embodiment of the Present Invention>
Degradation of signal quality due to external light is a well-known problem in measurement methods using photoplethysmography. In photoplethysmogram measurement with a headset, since the structure is such that it is almost covered by the auricle, external light is hardly input if the headset is worn correctly. Conversely, if the headset is not attached properly, there will be a gap between the headset and the auricle, resulting in a high noise level with respect to the heartbeat.

Therefore, in the present embodiment, the wearing state of the headset is determined from the waveform of the signal obtained by photoplethysmography.

<Configuration of headset system according to second embodiment of the present invention>
A headset system according to a second embodiment of the present invention has a headset 200 shown in FIG. The headset 200 has a configuration similar to that of the headset 100 according to the first embodiment, and further includes a photoplethysmograph 216 for measuring photoplethysmograms.

The photoplethysmogram measuring device 216 includes a light emitting unit such as a near-infrared LED and a photodetector such as a phototransistor, and measures a photoplethysmogram in the ear canal.

The calculation unit 22 extracts the waveform of the signal as biological information from the output of the photoplethysmograph 216 .

Specifically, the analysis unit 32 of the calculation unit 22 applies a low-pass filter to the signal output from the photoplethysmograph 216 and amplifies the waveform of the ultra-low-band signal is transmitted to the information processing unit 50 by the communication unit 23 as biological information.

Input unit 60 of information processing unit 50 receives input of biometric information received from headset 200 .

The biometric information analysis unit 72 detects peaks and bottoms from the waveform of the signal as biometric information received by the input unit 60, and removes the peaks and bottoms that are estimated to be erroneously detected among the detected peaks and bottoms. , the heart rate is calculated based on the removed peaks and bottoms.

Other configurations and actions of the headset system according to the second embodiment are the same as those of the first embodiment, and therefore description thereof is omitted.

As described above, according to the headset system according to the second embodiment of the present invention, biological information is analyzed and output from the signal output from the photoelectric pulse wave measuring device of the headset, and information processing is performed. The user can determine the wearing state of the headset by visualizing the biological information for determining the wearing state of the headset by the visualization unit of the unit.

<Example>
An example of the headset according to the first embodiment will be described. As shown in FIG. 14, the housing 10 of the headset of this embodiment is formed by fitting a main housing 1a and a front housing 1b.

The main housing 1a is a hollow member having a cylindrical shape as a whole, and a rear opening is closed by a cover 2. As shown in FIG. A main substrate 3 is arranged inside the main housing 1a so as to face the opening thereof. The main board 3 is a board on which electronic components functioning as a reproduction unit 20, a calculation unit 22, and a communication unit 23 are mounted.

A battery 6 is arranged in front of the main board 3 with a battery cushion 7 and a battery cap 8 interposed therebetween.

A housing rubber 9 is provided on the outer periphery of the main housing 1a. The housing rubber 9 is a cylindrical elastic member fitted around the outer periphery of the main housing 1a, which reduces contact with the ear and prevents water from entering the housing 10. As shown in FIG.

The front housing 1b is arranged so as to close the front opening of the cylindrical main housing 1a. The front housing 1b has an oblique truncated cone shape as a whole, and a part of the peripheral edge is slightly raised toward the eardrum side.

An external auditory canal insertion portion 12 is provided in front of the front housing 1b and protrudes from the top of the oblique truncated cone toward the eardrum. The external auditory canal insertion part 12 has a cylindrical shape and is provided in a part of the front housing 1b. A driver 14 having a cylindrical case is installed inside the ear canal insertion portion 12 . Therefore, a positioning portion 11 for the driver 14 is provided near the front opening of the ear canal insertion portion 12 , and the front end portion of the driver 14 is engaged with the positioning portion 11 , so that the driver 14 is positioned in the ear canal insertion portion 12 . Fixed to the inner surface. The rear end of the driver 14 is positioned near the front end of the front housing 1b. The driver 14 has a magnetic circuit for generating an output signal, a diaphragm, etc. in a cylindrical case, and has an appropriate well-known structure.

The headset of this embodiment has a microphone 16 . The microphone 16 is provided in the vicinity of the ear canal insertion portion 12 in the front housing 1b, that is, behind the driver 14. As shown in FIG.

The microphone 16 is mounted on the microphone board 15 . The microphone board 15 is fixed to the block 416 . A block 416 is a block-shaped member that supports the microphone 16 and the microphone substrate 15 . The microphone board 15 and the block 416 are provided with openings 15 a and 16 a so that the acoustic signal in the ear canal can reach the microphone 16 .

The inner surface of the ear canal-insertion portion 12 is provided with a hollow portion 16A that is a groove formed along the axial direction of the ear canal-insertion portion 12 . The hollow portion 16A is a rectangular groove-shaped space formed between the side surface of the driver 14 and communicates from the front end portion of the ear canal insertion portion 12 to the opening portion 16a of the block 416 fixed to the front housing 1b. ing.

An earpiece 13 is fixed to the outer circumference of the ear canal insertion portion 12 . The earpiece 13 is also called an eartip, an earpad, or an earcap, and is made of an elastic member such as silicone rubber. The earpiece 13 has, at the tip of a cylindrical portion 13b fitted to the outer circumference of the ear canal insertion portion 12, a portion 13a that is formed in a hemisphere and adheres to the wall surface of the ear canal. An earpiece mounting groove 412 is provided on the outer circumference of the ear canal insertion section 12 , and a fitting section 13 c is provided on the inner circumference of the cylindrical section 13 b of the earpiece 13 , and the fitting section 13 c meshes with the earpiece mounting groove 412 . Thereby, the earpiece 13 is fixed to the ear canal insertion portion 12 .

The user adjusts the size of the earpiece 13 while viewing the waveform of the signal displayed on the information processing section 50 so that the wave height is maximized.

The present invention is not limited to the above-described embodiments, and various modifications and applications are possible without departing from the gist of the present invention.

For example, the user may be prompted to change the size of the earpiece on the display of the information processing unit, and the visualized results may be displayed side by side for each earpiece size to allow the user to determine the wearing state.

Alternatively, only the waveform of the signal as biometric information may be visualized without calculating the wearing state score.

Also, in the above embodiments, a headset having earpieces has been described, but the headset of the present invention can also be applied to an overhead headset. In this case as well, the user can judge whether the headset is worn properly by adjusting the wearing condition of the headset so that the wave height is maximized while viewing the waveform of the signal displayed on the information processing unit. . For example, the user can adjust the wearing condition of the headset by adjusting the pull-out length of the band that connects the left and right headphone housings, or by removing hair caught between the ear pads of the headphone housing. In this way, even when the present invention is applied to an overhead type headset, it is possible to provide the user with a good wearing condition of the headset.

10 Housing 12 Ear canal insertion portion 13 Earpiece 16 Microphone 20 Playing portion 22 Calculation portion 23 Communication portion 30 Authentication portion 32 Analysis portion 50 Information processing portion 60 Input portion 70 Calculation portion 72 Biological information analysis portion 74 Judgment portion 76 Visualization portion 80 Output portion 100 , 200 headset 216 photoplethysmograph

Claims (7)

a hollow housing that is worn over the user's ear;
a microphone provided inside the housing; and an analysis unit that analyzes and outputs biological information from a signal output from the microphone;
an information processing unit including: an input unit that receives the biometric information output from the headset; and a visualization unit that visualizes the biometric information to determine the wearing state of the headset;
Headset system including. a hollow housing that is worn over the user's ear;
a headset including a photodetector provided inside the housing, and an analysis unit that analyzes and outputs biological information from a signal output from the photodetector;
an information processing unit including: an input unit that receives the biometric information output from the headset; and a visualization unit that visualizes the biometric information to determine the wearing state of the headset;
Headset system including. 3. The headset system according to claim 2, wherein the photodetector is a photoplethysmograph for measuring a photoplethysmogram. the information processing unit further includes a determination unit that determines a wearing state of the headset based on the biological information;
4. The headset system according to any one of claims 1 to 3, wherein the visualization unit visualizes the biological information and the determination result by the determination unit. The information processing unit
Detecting peaks and bottoms from the waveform of the signal as the biological information received by the input unit, removing peaks and bottoms that are estimated to be erroneous detection among the detected peaks and bottoms, and removing peaks after removal and a biological information analysis unit that calculates the heart rate based on the bottom,
5. The headset system according to claim 4, wherein the determination unit determines the wearing state using the number of detected peaks and bottoms and the number of removed peaks and bottoms. The headset according to any one of claims 1 to 5, wherein the analysis unit applies a low-pass filter to the output signal and outputs the biological information obtained by amplifying the signal. system. The headset system according to any one of claims 1 to 6, wherein the headset is a part of the housing and further includes a cylindrical ear canal insertion portion provided in a portion of the housing on the side of the ear canal. .

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