Earphones and biological information measuring device

Abstract

Earphones, comprising: a first ear piece that can communicate with a communications terminal and is worn on the right ear of a user; and a second ear piece that can communicate with the communications terminal and is worn on the left ear of the user. The first ear piece has: a first sensor that acquires first biometric information; a first time acquisition unit that acquires reference time information; and a first transmission unit that associates the first biometric information and the reference time information and sends these to the communications terminal. The second ear piece has: a second sensor that acquires second biometric information; a second time acquisition unit that acquires reference time information; and a second transmission unit that associates the second biometric information and the reference time information and sends these to the communications terminal.

Description

[Technical field]

[0001] The present disclosure relates to an earphone and a biological information measuring device. [Background technology]

[0002] 2. Description of the Related Art Earphones that acquire biosignals are known in the art (see, for example, Patent Document 1 below). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-215963 A Summary of the Invention

[0004] In Patent Document 1, the electrodes that acquire biosignals are arranged close to each other. When the electrodes are arranged close to each other in this manner, the potential difference between the biosignals acquired by each electrode becomes small, and the biosignals cancel each other out, becoming small.

[0005] An object of the present disclosure is to detect biological signals with higher accuracy.

[0006] The present disclosure provides an earphone comprising a first earpiece capable of communicating with a communication terminal and worn on a user's right ear, and a second earpiece capable of communicating with the communication terminal and worn on the user's left ear. The first earpiece has a first sensor for acquiring first biometric information, a first time acquisition unit for acquiring reference time information, and a first transmission unit for transmitting the first biometric information and the reference time information in association with each other to the communication terminal. The second earpiece has a second sensor for acquiring second biometric information, a second time acquisition unit for acquiring reference time information, and a second transmission unit for transmitting the second biometric information and the reference time information in association with each other to the communication terminal. [Brief description of the drawings]

[0007] [Figure 1]FIG. 1 is a diagram for explaining an overview of this embodiment. [Diagram 2] FIG. 2 is a block diagram showing the functional configuration of the earphone according to this embodiment. [Diagram 3] FIG. 3 is an external view of the earphone according to the present embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing a cross section taken along line IV-IV of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, the present embodiment will be described with reference to the accompanying drawings. In order to facilitate understanding of the description, the same components in each drawing are denoted by the same reference numerals as much as possible, and duplicated description will be omitted.

[0009] An overview of this embodiment will be described with reference to FIG. 1. The earphone 2 according to this embodiment includes a first earpiece 2R and a second earpiece 2L. The first earpiece 2R is worn on the right ear of a user H. The second earpiece 2L is worn on the left ear of the user H. The first earpiece 2R and the second earpiece 2L are configured to be capable of communicating with a smartphone M. The smartphone M is an example of a communication terminal. The first earpiece 2R and the second earpiece 2L are configured to be capable of receiving GNSS signals transmitted from Global Navigation Satellite System (GNSS) satellites Sa and Sb.

[0010] Next, components of the earphone 2 according to this embodiment will be described with reference to Fig. 2. The earphone 2 includes a first earpiece 2R and a second earpiece 2L. The first earpiece 2R includes, as components, a first time acquisition unit 271, a main sensor 272 (first sensor), a reference sensor 273 (third sensor), a ground sensor 274 (fifth sensor), a first A / D conversion unit 275, and a first transmission unit 276.

[0011] The first time acquisition unit 271 receives a GNSS signal transmitted from a GNSS satellite Sa and acquires absolute time information contained in the GNSS signal. The first time acquisition unit 271 outputs the acquired absolute time information to the first A / D conversion unit 275. The first time acquisition unit 271 includes, for example, a GPS (Global Positioning System) chip.

[0012] The main sensor 272 is provided at a position where it can acquire the first biological information of the user H as an electrical signal. The arrangement position of the main sensor 272 will be described later. The main sensor 272 outputs the sensed first biological information to the first A / D conversion unit 275.

[0013] The reference sensor 273 is provided at a position where it can acquire the third biological information of the user H as an electrical signal. The arrangement position of the reference sensor 273 will be described later. The reference sensor 273 outputs the sensed third biological information to the first A / D conversion unit 275.

[0014] The ground sensor 274 is a sensor that obtains ground potential information as an electric signal. The arrangement position of the ground sensor 274 will be described later. The ground sensor 274 outputs the sensed ground potential information to the first A / D conversion section 275.

[0015] The first A / D conversion unit 275 samples each piece of information in accordance with the timing of the absolute time information. For example, as a method of matching the sampling to the timing of the absolute time information, sampling may be performed every time in accordance with the absolute time information, or sampling may be performed in accordance with the absolute time information at regular intervals, such as every second. The first A / D conversion unit 275 outputs each piece of sampled information to the first transmission unit 276.

[0016] The first transmission unit 276 transmits the first biological information output from the main sensor 272 and the third biological information output from the reference sensor 273 to the communication terminal M in association with absolute time information. The first transmission unit 276 may also generate first difference information which is a difference between the first biological information output from the main sensor 272 and the ground potential information output from the ground sensor 274, and transmit the first difference information to the communication terminal M in association with the absolute time information. Similarly, the first transmission unit 276 may generate third difference information which is a difference between the third biological information output from the reference sensor 273 and the ground potential information output from the ground sensor 274, and transmit the third difference information to the communication terminal M in association with the absolute time information. Note that the first A / D conversion unit 275 may associate each piece of information with the absolute time information (e.g., provide a timestamp).

[0017] In the above example, the first transmission unit 276 associates the first biometric information or the first difference information with absolute time information and transmits it to the communication terminal M through the first channel. The absolute time information associated with the first biometric information or the first difference information is synchronized with the timing of sensing by the main sensor 272. The first transmission unit 276 also associates the third biometric information or the third difference information with absolute time information and transmits it to the communication terminal M through the third channel. The absolute time information associated with the third biometric information or the third difference information is synchronized with the timing of sensing by the reference sensor 273. The third channel may be the same channel as the first channel or a different channel. The above-mentioned biometric information or ground potential information includes information sampled by the first A / D conversion unit 275.

[0018] The second earpiece 2L has as its components a second time acquisition unit 281, a main sensor 282 (second sensor), a reference sensor 283 (fourth sensor), a ground sensor 284 (sixth sensor), a second A / D conversion unit 285, and a second transmission unit 286.

[0019] The second time acquisition unit 281 receives a GNSS signal transmitted from the GNSS satellite Sa, and acquires absolute time information contained in the GNSS signal. The second time acquisition unit 281 outputs the acquired absolute time information to the second A / D conversion unit 285.

[0020] The main sensor 282 is provided at a position where it can acquire the second biological information of the user H as an electrical signal. The arrangement position of the main sensor 282 will be described later. The main sensor 282 outputs the sensed second biological information to the second A / D conversion unit 285.

[0021] The reference sensor 283 is provided at a position where it can acquire the fourth biological information of the user H as an electrical signal. The arrangement position of the reference sensor 283 will be described later. The reference sensor 283 outputs the sensed fourth biological information to the second A / D conversion unit 285.

[0022] The ground sensor 284 is a sensor that obtains ground potential information as an electric signal. The arrangement position of the ground sensor 284 will be described later. The ground sensor 284 outputs the sensed ground potential information to the second A / D conversion unit 285.

[0023] The second A / D conversion unit 285 samples each piece of information in accordance with the timing of the absolute time information. For example, as a method of matching the sampling to the timing of the absolute time information, sampling may be performed every time in accordance with the absolute time information, or sampling may be performed in accordance with the absolute time information at regular intervals, such as every second. The second A / D conversion unit 285 outputs each piece of sampled information to the second transmission unit 286.

[0024] The second transmission unit 286 transmits the second biological information output from the main sensor 282 and the fourth biological information output from the reference sensor 283 to the communication terminal M in association with absolute time information. The second transmission unit 286 may also generate second difference information which is a difference between the second biological information output from the main sensor 282 and the ground potential information output from the ground sensor 284, and transmit the second difference information to the communication terminal M in association with the absolute time information. Similarly, the second transmission unit 286 may generate fourth difference information which is a difference between the fourth biological information output from the reference sensor 283 and the ground potential information output from the ground sensor 284, and transmit the fourth difference information to the communication terminal M in association with the absolute time information. Note that the second A / D conversion unit 285 may associate each piece of information with the absolute time information (e.g., provide a timestamp).

[0025] In the above example, the second transmission unit 286 transmits the second bioinformation or the second difference information to the communication terminal M in association with the absolute time information through the second channel. The absolute time information associated with the second bioinformation or the second difference information is synchronized with the timing of sensing by the main sensor 282. The second transmission unit 286 transmits the fourth bioinformation or the fourth difference information to the communication terminal M in association with the absolute time information through the fourth channel. The absolute time information associated with the fourth bioinformation or the fourth difference information is synchronized with the timing of sensing by the reference sensor 283. The fourth channel may be the same channel as the second channel or a different channel. Each of the above bioinformation or ground potential information includes information sampled by the second A / D conversion unit 285.

[0026] Next, an example of the external shape of the earpiece and the arrangement of each sensor will be described with reference to Fig. 3 and Fig. 4. Fig. 3 is a cross-sectional view showing the IV-IV cross section of Fig. 4. The first earpiece 2R and the second earpiece 2L have a common basic structure and differ only in the shape suitable for insertion into the left and right ears, so the first earpiece 2R will be used as an example for the description.

[0027] The first earpiece 2R includes a housing 21, an ear tip 22, and a wing 23. The housing 21 is a member having a cavity therein, and this cavity contains a speaker 24 and a battery 25. The ear tip 22 is attached to a nozzle 26 protruding from the housing 21.

[0028] The nozzle 26 has a shape such that a flange is formed at one end of a cylindrical member. Specifically, the nozzle 26 has a cylindrical portion 31 that is positioned in the ear canal of the wearer when the first earpiece 2R is attached, a flange portion 32 fixed to the housing 21, and a sound guide portion 33 that connects the interiors of the cylindrical portion 31 and the flange portion 32 in the first direction X.

[0029] The cylindrical portion 31 extends in the first direction X so as to protrude from the housing 21, and a locking protrusion 35 for detachably locking the ear tip 22 is formed on the tip side of the cylindrical portion 31. The flange portion 32 is formed on the base end side of the cylindrical portion 31. The sound guide portion 33 functions as a passage through which sound from the speaker 24 passes. Such a nozzle 26 is formed as a rigid body. As long as it has this characteristic, the material for forming the nozzle 26 is not limited, but one example is hard ABS resin.

[0030] The housing 21 includes a nozzle fixing portion 40 to which the flange portion 32 of the nozzle 26 is fixed, and an expansion portion 42 that extends from the nozzle fixing portion 40 to the opposite side of the nozzle 26 and is more expanded than the nozzle fixing portion 40. The nozzle fixing portion 40 includes an opening 50 through which the cylindrical portion 31 of the nozzle 26 is inserted, a restricting portion 52 that abuts against the flange portion 32 of the nozzle 26 to restrict the nozzle 26 from falling out of the opening 50, and a surrounding portion 54 that connects between the restricting portion 52 and the expansion portion 42 and surrounds the flange portion 32. The nozzle 26 can be fixed to the nozzle fixing portion 40 by, for example, fitting the flange portion 32 into the surrounding portion 54, or by bonding the flange portion 32 to the restricting portion 52 or the surrounding portion 54.

[0031] The extension portion 42 is formed so as to gradually expand as it moves away from the nozzle fixing portion 40. Inside the extension portion 42, the speaker 24 is accommodated on the nozzle 26 side, and the battery 25 is accommodated in a portion that is larger than the portion accommodating the speaker 24. The extension portion 42 also has an opening 60 for wiring at the end 42a where the expansion ends. The speaker 24 and the battery 25 are connected to the board 70 by wiring through this opening 60. The opening 60 is also used to insert the speaker 24 and the battery 25 into the housing 21 when assembling the first earpiece 2R.

[0032] The extension section 42 has an end surface 42b where the extension ends, which is formed as a flat surface. A plate 72 to which a substrate 70 is fixed is placed on the end surface 42b, and a cover 74 that covers the substrate 70 and the plate 72 is attached. An antenna for wireless communication is provided on the substrate 70. The antenna is compatible with wireless communication standards such as Bluetooth (registered trademark). Therefore, the first earpiece 2R is configured as a wireless earphone, and is wirelessly connected to devices such as a mobile terminal and a laptop, and communicates data such as sound with these devices. A first time acquisition unit 271 and a first transmission unit 276 are provided on the substrate 70.

[0033] The wing 23 includes an annular attachment portion 80 that is fitted into the circumferential surface of the cover 74, and an earmuff portion 82 that protrudes from the attachment portion 80. The earmuff portion 82 protrudes from the attachment portion 80 in a generally U-shape toward the ear tip 22. The earmuff portion 82 mainly functions to hook onto the outer ear of the wearer when the first earpiece 2R is worn, and supports the first earpiece 2R so that it does not fall off the concha of the wearer. The wing 23, like the housing 21, can be made of a material that is elastic and flexible.

[0034] The ear tip 22 is formed of a first member 22A and a second member 22B having electrical conductivity. For example, the first member 22A and the second member 22B are formed of different materials and are detachable. The shape of the first member 22A is not limited to the example shown in Figs. 3 and 4, and may be any shape as long as it has a portion that contacts the inner wall of the wearer's ear canal and this contact portion is appropriately configured to contact the ear canal. In addition, it is preferable that the surface area of ​​this contact portion is large.

[0035] The ear tip 22 includes a first member 22A located on the eardrum side and a second member 22B located on the housing 21 side. The first member 22A is made of, for example, conductive rubber, and this conductive rubber contains silver or silver chloride. Preferably, to ensure appropriate conductivity, silver or silver chloride is contained in a predetermined mass % or more of the conductive material contained in the conductive rubber.

[0036] The first member 22A may be formed of a silicon material containing a metal-based filler. For example, the first member 22A can be made into a highly conductive material by appropriately mixing silver, copper, gold, aluminum, zinc, nickel, etc., as a metal-based filler into the silicon material. In addition, it is not necessary for all of the filler contained to be silver or silver chloride, as long as a part of the filler is silver or silver chloride. This reduces the content of silver or silver chloride, thereby lowering the hardness of the rubber and making it possible to create a conductive rubber with an appropriate hardness.

[0037] The second member 22B is preferably made of an inexpensive non-conductive elastic body (such as silicone rubber).

[0038] The housing 21 is made of, for example, conductive rubber, and this conductive rubber contains silver or silver chloride. Preferably, to ensure appropriate conductivity, the conductive rubber contains silver or silver chloride in a predetermined mass % or more of the conductive material contained therein.

[0039] The housing 21 may be formed of a silicon material containing a metal-based filler. For example, the first member 22A can be made into a highly conductive material by appropriately mixing silver, copper, gold, aluminum, zinc, nickel, etc., as a metal-based filler into a silicon material. In addition, it is not necessary for all of the filler contained to be silver or silver chloride, as long as a part of the filler is silver or silver chloride. This reduces the content of silver or silver chloride, and therefore the hardness of the rubber can be reduced, making it possible to create a conductive rubber with an appropriate hardness.

[0040] The earmuffs 82 are made of, for example, conductive rubber, and this conductive rubber contains silver or silver chloride. Preferably, to ensure appropriate conductivity, the conductive rubber contains silver or silver chloride at a predetermined mass % or more of the conductive material contained therein.

[0041] The earmuffs 82 may be made of a silicon material containing a metal-based filler. For example, the first member 22A can be made of a highly conductive material by appropriately mixing metal-based fillers such as silver, copper, gold, aluminum, zinc, and nickel into the silicon material. In addition, it is not necessary for all of the filler contained to be silver or silver chloride, as long as a part of the filler is silver or silver chloride. This reduces the content of silver or silver chloride, and therefore the hardness of the rubber can be reduced, making it possible to create a conductive rubber with an appropriate hardness.

[0042] By configuring as described above, the first member 22A of the ear tip 22, the housing 21, and the earmuff 82 have electrical conductivity. In the example shown in the present embodiment, the first member 22A is used as the main sensor 272, the housing 21 is used as the ground sensor 274, and the earmuff 82 is used as the reference sensor 273, but this is not limited to the example. In addition, the conductive material of the housing 21, the conductive material of the first member 22A, and the conductive material of the earmuff 82 may be the same or different. In addition, the conductivity of the first member 22A may be higher than the conductivity of the housing 21 and the earmuff 82.

[0043] As described above, the earphone 2 according to this embodiment includes a first earpiece 2R capable of communicating with a communication terminal and worn on the right ear of a user H, and a second earpiece 2L capable of communicating with a communication terminal and worn on the left ear of a user H. The first earpiece 2R has a main sensor 272 as an example of a first sensor that acquires first biometric information, a first time acquisition unit 271 that acquires absolute time information as an example of reference time information, and a first transmission unit 276 that associates the first biometric information with the absolute time information and transmits it to the communication terminal. The second earpiece 2L has a main sensor 282 as an example of a second sensor that acquires second biometric information, a second time acquisition unit 281 that acquires absolute time information as an example of reference time information, and a second transmission unit 286 that associates the second biometric information with the absolute time information and transmits it to the communication terminal.

[0044] Since the first transmitting unit 276 transmits the first biometric information of the right ear side where the first earpiece 2R is worn to the communication terminal in association with absolute time information, the communication terminal can accurately grasp at what time the biometric information was acquired. Since the second transmitting unit 286 transmits the second biometric information of the left ear side where the second earpiece 2L is worn to the communication terminal in association with absolute time information, the communication terminal can accurately grasp at what time the biometric information was acquired. Since the earpiece is worn on the ear, even if multiple sensors for acquiring biometric information are provided in the same earpiece, the potential difference between the acquired signals is small and the signals cancel each other out, making it difficult to improve the accuracy of the biometric information. On the other hand, if a sensor is provided in each different earpiece and biometric information is acquired by each sensor, the problem of not being able to ensure a potential difference can be solved. However, if biometric information acquired in different earpieces is transmitted to a communication terminal for information processing, a new problem arises in that errors occur due to communication delays, etc. Therefore, in this embodiment, absolute time information is associated with each piece of biometric information acquired by each earpiece and transmitted to the communication terminal, thereby eliminating errors caused by communication delays and making it possible to acquire accurate biometric information with a guaranteed potential difference.

[0045] In this embodiment, absolute time information included in a GNSS signal is used as an example of reference time information, but other time information can be used as reference time information as long as it has the accuracy required for identifying the time of the biometric information acquired by each earpiece. For example, the first time acquisition unit 271 and the second time acquisition unit 281 may acquire a signal that causes an error in the reference time of each earpiece to be 1 ms or less. The reference time information indicates the acquisition time of the biometric information, and can also be used as information for synchronizing with biometric information acquired by other earpieces. The reference time information can also be replaced with synchronization information for synchronizing with biometric information acquired by other earpieces.

[0046] As described above, the first earpiece 2R has a reference sensor 273 as an example of a third sensor that acquires third biometric information at a position different from the main sensor 272 as an example of a first sensor. The first transmission unit 276 transmits the first biometric information, the third biometric information, and absolute time information as an example of reference time information in association with each other to the communication terminal. The second earpiece 2L has a reference sensor 283 as an example of a fourth sensor that acquires fourth biometric information at a position different from the main sensor 282 as an example of a second sensor. The second transmission unit 286 transmits the second biometric information, the fourth biometric information, and absolute time information as an example of reference time information in association with each other to the communication terminal.

[0047] In this way, the absolute time information is associated with the biometric information acquired at two different positions and transmitted to the communication terminal from the two earpieces, so that the communication terminal can acquire four pieces of biometric information whose acquisition times are accurately recorded using the absolute time information. For example, by performing cross-processing such as processing the first biometric information and the fourth biometric information as the main biometric information and the reference biometric information, respectively, and processing the second biometric information and the third biometric information as the main biometric information and the reference biometric information, respectively, cross-reference processing that increases the signal components or increases the potential difference becomes possible.

[0048] As described above, the first time acquisition unit 271 receives the GNSS signal transmitted from the GNSS satellite Sa and acquires reference time information including absolute time information, and the second time acquisition unit 281 receives the GNSS signal transmitted from the GNSS satellite Sa and acquires reference time information including absolute time information.

[0049] As described above, the first earpiece 2R has the ground sensor 274 as an example of a fifth sensor that acquires ground potential information at a position different from the main sensor 272 as an example of a first sensor and the reference sensor 273 as an example of a third sensor. The first transmission unit 276 transmits to the communication terminal the first difference information between the first biological information and the ground potential information, the second difference information between the third biological information and the ground potential information, and the reference time information in association with each other. The second earpiece 2L has the ground sensor 284 as an example of a sixth sensor that acquires ground potential information at a position different from the main sensor 282 as an example of a second sensor and the reference sensor 283 as an example of a fourth sensor. The second transmission unit 286 transmits to the communication terminal the third difference information between the second biological information and the ground potential information, the fourth difference information between the fourth biological information and the ground potential information, and the reference time information in association with each other. The third difference information may be calculated by the first A / D conversion unit 275 as a difference between the first biological information and the ground potential information sampled at the same timing. The fourth difference information may also be calculated by the second A / D conversion section 285, similarly to the third difference information.

[0050] By transmitting difference information, which is the difference between the potential indicating the biological information and the ground potential, to the communication terminal in association with the reference time information, it is possible to acquire biological information with improved signal accuracy in association with the reference time.

[0051] As described above, the first earpiece 2R has a first A / D converter 275 that samples the first electrical signal measured by the main sensor 272 as an example of a first sensor based on reference time information, and the first transmission unit 276 may transmit the first biological information sampled by the first A / D converter 275 to the communication terminal in association with the reference time information. The second earpiece 2L has a second A / D converter 285 that samples the second electrical signal measured by the main sensor 282 as an example of a second sensor based on reference time information, and the second transmission unit 286 may transmit the second biological information sampled by the second A / D converter 285 to the communication terminal in association with the reference time information. This makes it possible to match the sampling timing of the left and right, and to more appropriately synchronize the left and right biological information. For example, even if an accurate time stamp is added to each biological information, if the timing of sampling by the left and right sensors is not synchronized, it is difficult to appropriately synchronize the left and right biological information. However, this problem can be solved by synchronizing the timing of sampling between the left and right based on the reference time information. It is also preferable to synchronize the timing of sampling for the third biological information, the fourth biological information, and each piece of ground potential information based on the reference time information.

[0052] In the above-described embodiment, a wider range of electroencephalogram information is estimated from the electroencephalogram information acquired from the ear canal, but prediction is not limited to the wider range of electroencephalogram information. For example, bioinformation obtainable from the human body can be estimated from electroencephalogram information or bioinformation obtainable from the ear canal. As a specific example, biosignals obtainable from the head include electrooculography signals, heartbeat signals from the carotid artery, and myoelectric signals from the masseter or temporalis muscles, in addition to electroencephalograms. In addition, biosignals obtainable from the human body include, for example, electrocardiogram signals. These bioinformation may be measured using a biosensor that measures the corresponding bioinformation.

[0053] In the above-described embodiment, earphones having a pair of ear pieces are described as an example of a device for acquiring biological information, but the technology of the present disclosure can also be applied to at least two biological information measuring devices that measure biological information at different positions. For example, one device is one of the ear pieces of the present disclosure, and the other device is, for example, eyewear (glasses) and has a configuration similar to that of the other ear piece of the present disclosure.

[0054] According to the above example, the biological information measuring device includes a first device that can communicate with the communication terminal and is attached to a first predetermined part of the user, and a second device that can communicate with the communication terminal and is attached to a second predetermined part of the user. The first device has a first sensor that acquires first biological information, a first time acquisition unit that acquires reference time information, and a first transmission unit that associates the first biological information with the reference time information and transmits them to the communication terminal. The second device has a second sensor that acquires second biological information, a second time acquisition unit that acquires reference time information, and a second transmission unit that associates the second biological information with the reference time information and transmits them to the communication terminal. This enables cross-reference signal processing that utilizes absolute time synchronization technology for biological information between two devices. The configuration and processing in the above-mentioned embodiment can also be applied to this biological information measuring device.

[0055] The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Any design modifications made by a person skilled in the art to these specific examples are also included within the scope of the present disclosure as long as they have the features of the present disclosure. The elements of each of the above-mentioned specific examples and their arrangements, conditions, shapes, etc. are not limited to those exemplified and can be changed as appropriate. The combination of each of the elements of each of the above-mentioned specific examples can be changed as appropriate as long as no technical contradiction occurs. [Explanation of symbols]

[0056] 2: Earphones 2R: 1st earpiece 2L: Second earpiece 21: Housing 22: Ear tips 23: Wing 24: Speaker 25: Battery 26: Nozzle 42: Extension 60:Aperture 70: Substrate 272, 282: Main sensor 273,283: Reference sensor 274,274: Ground sensor Sa,Sb:Satellite

Claims

1. An earphone, A first earpiece capable of communicating with a communication terminal and attached to a right ear of a user; a second earpiece capable of communicating with the communication terminal and attached to the left ear of a user; the first earpiece includes a first sensor that acquires first biometric information, a first time acquisition unit that acquires reference time information indicating a time when the first biometric information was acquired, and a first transmission unit that associates the first biometric information with the reference time information and transmits the first biometric information and the reference time information to the communication terminal; having the second earpiece includes a second sensor that acquires second biometric information, a second time acquisition unit that acquires reference time information indicating a time when the second biometric information was acquired, and a second transmission unit that associates the second biometric information with the reference time information and transmits the second biometric information to the communication terminal; An earphone having

2. The earphone according to claim 1, the first earpiece has a third sensor that acquires third biological information at a position different from that of the first sensor, the first transmission unit transmits, to the communication terminal, the first biometric information, the third biometric information, and reference time information indicating a time when the first biometric information and the third biometric information were acquired in association with each other; the second earpiece has a fourth sensor that acquires fourth biological information at a position different from that of the second sensor, The second transmission unit associates the second biometric information, the fourth biometric information, and reference time information indicating the time when the second biometric information and the fourth biometric information were acquired, and transmits them to the communication terminal.

3. The earphone according to claim 1 or 2, the first time acquisition unit receives a GNSS signal transmitted from a GNSS satellite to acquire the reference time information including absolute time information; The second time acquisition unit receives a GNSS signal transmitted from a GNSS satellite and acquires the reference time information including absolute time information, the earphone.

4. The earphone according to claim 2, the first earpiece has a fifth sensor that acquires ground potential information at a position different from the first sensor and the third sensor, the first transmission unit transmits, to the communication terminal, first difference information between the first biological information and the ground potential information, second difference information between the third biological information and the ground potential information, and the reference time information in association with each other; the second earpiece has a sixth sensor that acquires ground potential information at a position different from the second sensor and the fourth sensor, The second transmission unit transmits third difference information between the second biometric information and the ground potential information, fourth difference information between the fourth biometric information and the ground potential information, and the reference time information to the communication terminal in association with each other.

5. The earphone according to claim 1, the first earpiece has a first A / D converter that samples a signal measured by the first sensor based on the reference time information; the first transmission unit transmits the first biological information sampled by the first A / D conversion unit and the reference time information to the communication terminal in association with each other; the second earpiece has a second A / D converter that samples a signal measured by the second sensor based on the reference time information; The second transmission unit transmits the second biological information sampled by the second A / D conversion unit and the reference time information to the communication terminal in association with each other.

6. A biological information measuring device, a first biological information measuring device capable of communicating with a communication terminal and attached to a first predetermined part of a user; a second biological information measuring device different from the first biological information measuring device, the second biological information measuring device being capable of communicating with the communication terminal and being attached to a second predetermined part of the user different from the first predetermined part; the first biological information measuring device includes a first sensor that acquires first biological information, a first time acquisition unit that acquires reference time information indicating a time when the first biological information was acquired, and a first transmission unit that associates the first biological information with the reference time information and transmits them to the communication terminal; The second biometric information measuring device has a second sensor that acquires second biometric information, which is the same type of biometric information as the first biometric information, a second time acquisition unit that acquires reference time information indicating the time when the second biometric information was acquired, and a second transmission unit that associates the second biometric information with the reference time information and transmits them to the communication terminal.

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