Wireless audio systems and wireless earphones

Abstract

This invention provides a wireless audio system and wireless earphones that measure biometric information with higher accuracy while listening to audio with wireless earphones and alert users to changes in their physical condition. [Solution] Wireless earphones 1-1 and 1-2 are equipped with ear-type body temperature sensors and transmit periodic measurements of body temperature inside the ear by the ear-type body temperature sensors to a wireless terminal 2. When a warning message is received from the wireless terminal 2 during playback or output of audio data, the output of the audio data is interrupted or the output volume is reduced and the warning message is output. The wireless terminal 2 periodically acquires the outside temperature, and if the acquired outside temperature and the body temperature measurement results received from wireless earphones 1-1 and 1-2 indicate a possible change in the user's physical condition, it sends a warning message to that effect to the wireless earphones 1-1 and 1-2.

Description

Technical Field

[0001] The present invention relates to a wireless audio system capable of listening to audio using wireless earphones.

Background Art

[0002] In recent years, wireless earphones that wirelessly connect to audio devices such as smartphones and portable audio players via short-range wireless communication such as Bluetooth (registered trademark), receive audio content transmitted from the audio devices, and play and output it have become widespread (for example, Patent Document 1). Unlike wired earphones, wireless earphones are highly convenient because there is no need to worry about handling the cord connecting the earphones and the audio device.

[0003] In recent years, wristwatch-type wearable devices (smartwatches) that measure biometric information such as body temperature of a user and display the measurement results have also become widespread (for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] According to a wristwatch-type wearable device, a user can judge their physical condition based on the measurement result of the displayed biometric information.

[0006] However, when listening to music or other audio using wireless earphones, users may become so engrossed in the audio that they fail to notice changes in their own physical condition or neglect to check the measurement results displayed on their wearable device. Furthermore, since smartwatch-type wearable devices measure biometric information such as body temperature while worn on the user's arm, the way the device is worn is likely to change during exercise (when the arm is moving, for example), which may result in inaccurate measurement of biometric information.

[0007] This invention has been made in view of the above circumstances, and its purpose is to provide a technology that can measure the biometric information of a user listening to audio with wireless earphones with higher accuracy and alert the user to changes in their physical condition. [Means for solving the problem]

[0008] To solve the above problems, the present invention comprises a wireless terminal that functions as an audio device, and a wireless earphone that receives, plays, and outputs audio data transmitted from the wireless terminal. Here, the wireless earphone is equipped with an ear-type body temperature sensor, which periodically measures the body temperature inside the ear and transmits the result to the wireless terminal. Furthermore, if it receives a warning message from the wireless terminal while playing or outputting audio data, it interrupts the output of the audio data or reduces the output volume and outputs the warning message. On the other hand, the wireless terminal periodically acquires the outside temperature, and if the measurement results of this outside temperature and the body temperature received from the wireless earphone indicate a possible change in the user's physical condition, it transmits a warning message to the wireless earphone to that effect. Here, the wireless terminal may periodically acquire the outside temperature using its own outside temperature sensor, or it may periodically access a web server that provides weather information services and acquire outside temperature information for the area including the current location from this web server. Alternatively, an outside temperature sensor may be provided in the wireless earphone, and the measurement results of body temperature and outside temperature may be periodically acquired from the wireless earphone.

[0009] For example, the wireless audio system of the present invention is A wireless audio system comprising a wireless terminal that functions as an audio device, and wireless earphones that receive, play, and output audio data transmitted from the wireless terminal, The aforementioned wireless earphones An ear thermometer that periodically measures the temperature inside the ear, A measurement result transmission means for transmitting the measurement result of the temperature inside the ear by the ear-type body temperature sensor to the wireless terminal, The system includes a warning means that, when a warning message is received from the wireless terminal while the audio data is being played back or output, interrupts the output of the audio data or reduces the output volume and outputs the warning message. The aforementioned wireless terminal is An external temperature acquisition method that periodically acquires the external temperature, A body temperature receiving means for receiving the body temperature measurement result from the wireless earphone, The system includes a warning message transmission means that, when the measurement results of the ambient temperature obtained by the ambient temperature acquisition means and the body temperature received by the body temperature receiving means indicate a possible change in the user's physical condition, transmits a warning message to the wireless earphone to that effect.

[0010] Furthermore, the wireless earphones of the present invention are Wireless earphones that receive, play, and output audio data transmitted from a wireless terminal that functions as an audio device, An ear thermometer that periodically measures the temperature inside the ear, An ambient temperature sensor that periodically measures the ambient temperature, Measurement result transmission means for transmitting the measurement result of the temperature inside the ear by the ear temperature sensor and the measurement result of the ambient temperature by the ambient temperature sensor to the wireless terminal, The system includes a warning means that, when a warning message is received from the wireless terminal while the audio data is being played back or output, interrupts the output of the audio data or reduces the output volume and outputs the warning message. [Effects of the Invention]

[0011] In the present invention, during the reproduction / output of audio data by wireless earphones, when the body temperature inside the user's ear and the outside air temperature indicate the possibility of a change in the user's physical condition, the output of the audio data is interrupted or the output volume is reduced, and a warning message is output. For this reason, the user can be prevented from concentrating on the audio and thus failing to notice a change in their own physical condition or neglecting to check their own physical condition while listening to audio using the wireless earphones. Further, in the present invention, since the body temperature inside the ear is measured by an ear-type body temperature sensor, compared with a wristwatch-type wearable device that measures body temperature on the wrist, which is susceptible to the influence of the external environment such as the outside air temperature and in which the wearing state may change due to the user's movement, the body temperature can be measured with higher accuracy.

[0012] Therefore, according to the present invention, the user's biological information can be measured with higher accuracy, and the user can be alerted to changes in their physical condition.

Brief Description of the Drawings

[0013] [Figure 1] FIG. 1 is a schematic configuration diagram of a wireless audio system according to an embodiment of the present invention. [Figure 2] FIGS. 2(A), 2(B), and 2(C) are front view, side view, and rear view of the wireless earphone 1. [Figure 3] FIG. 3 is a schematic functional configuration diagram of the earphone main body 10 of the wireless earphone 1. [Figure 4] FIG. 4 is a diagram for explaining the operation flow of the wireless earphone 1. [Figure 5] FIG. 5 is a schematic functional configuration diagram of the wireless terminal 2. [Figure 6] FIG. 6 is a diagram schematically showing an example of the registered contents of the warning message / reproduction target information storage unit 204. [Figure 7] FIG. 7 is a flowchart for explaining the operation of the wireless terminal 2.

Embodiments for Carrying Out the Invention

[0014] Hereinafter, an embodiment of the present invention will be described.

[0015] FIG. 1 is a schematic configuration diagram of a wireless audio system according to this embodiment.

[0016] As shown in the figure, the wireless audio system according to this embodiment includes a pair of wireless earphones 1-1 and 1-2 (hereinafter also simply referred to as wireless earphone 1) for wearing on both ears of a user, and a wireless terminal 2 that functions as an audio device.

[0017] During use, the wireless earphone 1 is wirelessly connected to the wireless terminal 2 by short-range wireless communication such as Bluetooth (registered trademark), receives the audio data transmitted from the wireless terminal 2, and plays and outputs it. Further, the wireless earphone 1 periodically measures the body temperature in the ear and the outside air temperature, and transmits the results to the wireless terminal 2. Then, if a warning message is received from the wireless terminal 2 during the playback and output of the audio data, the output of the audio data is interrupted or the output volume is reduced to output the warning message.

[0018] The wireless terminal 2 is connected to a network 4 such as a WAN (Wide Area Network) or a LAN (Local Area Network) via a wireless connection with an access point 5, accesses a media server 3 via the network 4, downloads desired audio data from the media server 3, and transmits it to the wireless earphone 1. Further, when the measurement results of the body temperature and the outside air temperature received from the wireless earphone 1 indicate a possibility of a change in the user's physical condition, the wireless terminal 2 transmits a warning message for alerting the user to the wireless earphone 1.

[0019] Next, details of the wireless earphone 1 and the wireless terminal 2 that constitute the wireless audio system according to this embodiment will be described.

[0020] First, let me explain the details of Wireless Earphone 1.

[0021] Figures 2(A), 2(B), and 2(C) are the front, side, and rear views of the wireless earphone 1.

[0022] Wireless earphone 1 is a canal-type wireless earphone and, as shown in the figure, is composed of a cylindrical earphone body 10 and an earpiece 14.

[0023] The earphone body 10 includes a cylindrical nozzle 11 provided on the front end surface 12A, an ambient temperature sensor 100 provided on the rear end surface 12B, and an ear-type body temperature sensor 101 that protrudes radially outward from the outer peripheral surface 13 of the nozzle 11.

[0024] The ambient temperature sensor 100 measures the ambient temperature when the wireless earphone 1 is worn in the ear and exposed to the outside air. On the other hand, the ear-type body temperature sensor 101 is located inside the ear when the wireless earphone 1 is worn in the ear and measures the body temperature inside the ear. For example, the ear-type body temperature sensor 101 can utilize the technology of the ear thermometer described in Japanese Patent Application Publication No. 2005-224617.

[0025] The earpiece 14 is a part made of thermoplastic elastomer or the like, attached to cover the outer peripheral surface 13 of the tip of the nozzle 11. When the wireless earphone 1 is placed in the user's ear, the earpiece 14 deforms to seal the gap between the outer peripheral surface of the nozzle 11 and the inner wall surface of the ear canal. An opening 16 is provided on the outer peripheral surface 15 of the earpiece 14, and the ear-type body temperature sensor 101 on the outer peripheral surface 13 of the nozzle 11 is exposed to the outside through this opening 16. As a result, when the nozzle 11 surrounded by the earpiece 14 is inserted into the ear canal, the ear-type body temperature sensor 101 is exposed inside the ear.

[0026] Figure 3 is a schematic functional configuration diagram of the earphone body 10 of the wireless earphone 1.

[0027] As shown in the figure, in addition to the above-mentioned ambient temperature sensor 100 and ear-type body temperature sensor 101, the earphone body 10 further includes a short-range wireless communication unit 102, a playback unit 103, a driver unit 104, and a main control unit 105.

[0028] The short-range wireless communication unit 102 is an interface for wirelessly connecting to the wireless terminal 2 using short-range wireless communication such as Bluetooth (registered trademark).

[0029] The playback unit 103 plays back audio data received from the wireless terminal 2 via the short-range wireless communication unit 102.

[0030] The driver unit 104 is a magnetic circuit equipped with a magnet, and in accordance with the playback signal of the audio data played back by the playback unit 103, it vibrates a diaphragm (not shown) located inside the nozzle 11 using electromagnetic force. This causes the audio to be emitted from the nozzle 11.

[0031] The main control unit 105 then comprehensively controls each part 100 to 104 of the earphone body 10.

[0032] The functional configuration of the earphone body 10 shown in Figure 3 is implemented in hardware using integrated logic ICs such as ASICs (Application Specific Integrated Circuits) and FPGAs (Field Programmable Gate Arrays). Alternatively, the functional components 102 to 105, other than the ambient temperature sensor 100 and the ear-type body temperature sensor 101, are implemented in software using computers such as DSPs (Digital Signal Processors) and microcomputers.

[0033] Figure 4 is a diagram illustrating the operation flow of wireless earphone 1.

[0034] This process begins when the main control unit 105 receives audio data from the wireless terminal 2 via the short-range wireless communication unit 102.

[0035] First, the main control unit 105 passes the audio data received from the wireless terminal 2 to the playback unit 103 and instructs it to play and output the audio data. In response, the playback unit 103 starts playing the audio data and outputting the playback signal to the driver unit 104 (S100). Then, the driver unit 104 drives the diaphragm according to the playback signal of the audio data input from the playback unit 103 and emits audio from the nozzle 11.

[0036] Next, when the playback unit 103 is playing and outputting audio data, the main control unit 105 instructs the ambient temperature sensor 100 and the ear temperature sensor 101 to take measurements when a periodic measurement timing arrives (YES in S101). In response, the ambient temperature sensor 100 and the ear temperature sensor 101 measure the ambient temperature and the temperature inside the ear, and pass the measurement results to the main control unit 105. The main control unit 105 then transmits the ambient temperature and temperature measurement results received from the ambient temperature sensor 100 and the ear temperature sensor 101 to the wireless terminal 2 via the short-range wireless communication unit 102 (S103). The process then proceeds to S108.

[0037] Furthermore, if the main control unit 105 receives a warning message from the wireless terminal 2 via the short-range wireless communication unit 102 while the playback unit 103 is playing and outputting audio data (YES in S104), it controls the playback unit 103 to interrupt the output of the audio data playback signal to the driver unit 104 or reduce its output volume (S105). Then, the main control unit 105 passes the warning message to the playback unit 103 and instructs it to play and output the warning message. In response, the playback unit 103 plays the warning message and outputs its playback signal to the driver unit 104 (S106). The driver unit 104 then drives the diaphragm according to the playback signal of the warning message input from the playback unit 103 and emits the warning message from the nozzle 11. Then, the main control unit 105 controls the playback unit 103 to resume the output of the audio data playback signal to the driver unit 104 or restore its output volume to its original level (S107). Next, proceed to S108.

[0038] In S108, the main control unit 105 returns to S101 if audio data is being played back and output by the playback unit 103 (NO in S108), and terminates this flow if the playback and output of audio data has finished (YES in S108).

[0039] Next, we will explain the details of wireless terminal 2.

[0040] Figure 5 is a schematic diagram of the functional configuration of the wireless terminal 2.

[0041] As shown in the figure, the wireless terminal 2 includes a short-range wireless communication unit 200, a wireless network interface unit 201, a human-machine interface unit 202, an audio data storage unit 203, a warning message / playback target information storage unit 204, a health monitoring unit 205, and a main control unit 206.

[0042] The short-range wireless communication unit 200 is an interface for wirelessly connecting to the wireless earphone 1 using short-range wireless communication such as Bluetooth (registered trademark).

[0043] The wireless network interface unit 201 is an interface for wirelessly connecting to the access point 5.

[0044] The human-machine interface unit 202 is an interface for presenting information to the user and receiving various operations from the user, and is equipped with input / output devices such as a microphone, speaker, and display panel with touch sensor.

[0045] The audio data storage unit 203 stores audio data downloaded from the media server 3 via the wireless network interface unit 201.

[0046] The warning message / playback target information storage unit 204 stores warning messages and, if necessary, identification information of the playback target (music, sound source) for each type of physical abnormality and symptom requiring attention, linked to the conditions of ambient temperature and body temperature.

[0047] Figure 6 is a schematic diagram showing an example of the registered contents of the warning message / replayable information storage unit 204.

[0048] As shown in the diagram, the warning message / playback target information storage unit 204 stores a record 2040 of a warning message for each type of physical abnormality and symptom requiring attention. The record 2040 of a warning message includes a field 2041 in which the ambient temperature condition is registered, a field 2042 in which the body temperature condition is registered, a field 2043 in which the type of target to be wary of (warning type) in situations corresponding to the ambient temperature and body temperature conditions registered in fields 2041 and 2042 is registered, a field 2044 in which a warning message for the warning type registered in field 2043 is registered, and a field 2045 in which identification information of the target to be played back when the ambient temperature and body temperature conditions registered in fields 2041 and 2042 are met is registered.

[0049] In this embodiment, for example, "heatstroke" is registered as a type of threat to be aware of when the outside temperature is 30 degrees Celsius or higher and the user's body temperature is high (37.5 degrees Celsius or higher), "colds, etc." is registered as a type of threat to be aware of when the outside temperature is below 30 degrees Celsius and the user's body temperature is high (37.5 degrees Celsius or higher), and "increased risk of heatstroke" is registered as a type of threat to be aware of when the outside temperature is below 30 degrees Celsius and the user's body temperature is normal or slightly feverish (below 37.5 degrees Celsius). Furthermore, when there is a risk of heatstroke, refreshing ambient sounds such as the sound of a babbling brook or the sound of grass and trees swaying in the breeze are registered as playback targets, and when there is a risk of colds, etc., music that can relax the user, such as slow-tempo classical music, is registered as playback targets. Please note that this registration information is merely an example. Different numerical ranges may be registered for the ambient temperature and user body temperature conditions, and other types of targets requiring attention (such as hypothermia) may be registered. In addition, other types of music may be registered as playback targets.

[0050] The main control unit 206 then comprehensively controls each of the wireless terminal 2's components 200-205.

[0051] The functional configuration of the wireless terminal 2 shown in Figure 5 is a mobile terminal such as a smartphone or tablet PC (Personal Computer) equipped with a CPU (Central Processing Unit), memory, auxiliary storage device such as flash memory, a wireless LAN communication device, and a short-range wireless communication device such as Bluetooth (registered trademark). In this terminal, the CPU loads a predetermined program from the auxiliary storage device into memory and executes it, thereby realizing it as a process.

[0052] Figure 7 is a flowchart illustrating the operation of the wireless terminal 2.

[0053] This flow begins when the main control unit 206 receives a playback instruction for audio data, along with the specification of the song title to be played, from the user via the human-machine interface unit 202.

[0054] First, the main control unit 206 accesses the media server 3 via the wireless network interface unit 201 and downloads the audio data of the song with the title specified by the user's playback command from the media server 3 and stores it in the audio data storage unit 203 (S200). Then, the main control unit 206 starts transmitting the audio data stored in the audio data storage unit 203 to the pair of wireless earphones 1-1 and 1-2 via the short-range wireless communication unit 200 (S201).

[0055] Next, the main control unit 206 receives the measurement results of the ambient temperature and the user's body temperature from each of the pair of wireless earphones 1-1 and 1-2 via the short-range wireless communication unit 200 (YES in S202), and passes these measurement results to the health monitoring unit 205. In response, the health monitoring unit 205 calculates the average value of the measurement results from the wireless earphones 1-1 and 1-2 for both the ambient temperature and body temperature (S203). Then, it searches the warning message / playback target information storage unit 204 for a warning message record 2040 in which the average value of the ambient temperature measurement results satisfies the ambient temperature conditions of field 2041, and the average value of the body temperature measurement results satisfies the body temperature conditions of field 2042 (S204).

[0056] Next, if the health monitoring unit 205 finds that the record 2040 of the relevant warning message is not stored in the warning message / playback target information storage unit 204 (NO in S205), it notifies the main control unit 206 of this fact and proceeds to S210.

[0057] Meanwhile, if the record 2040 of the relevant warning message is stored in the warning message / playback target information storage unit 204 (YES in S205), the health monitoring unit 205 displays the target type registered in field 2043 and / or the warning message registered in field 2044 of the record 2040 on the man-machine interface unit 202, and also transmits the warning message to the pair of wireless earphones 1-1 and 1-2 via the short-range wireless communication unit 200 (S206).

[0058] Furthermore, the health monitoring unit 205 determines whether or not the identification information of the playback target is registered in field 2045 of record 2040 (S207). If the identification information of the playback target is not registered (NO in S207), the process proceeds to S210. If the identification information of the playback target is registered (YES in S207), the unit notifies the main control unit 206 of this playback target identification information. In response, the main control unit 206 downloads the playback target identified by the notified identification information from the media server 3 via the wireless network interface unit 201 and stores it in the audio data storage unit 203 (S208). Then, the main control unit 206 changes the audio data to be transmitted to the pair of wireless earphones 1-1 and 1-2 from the audio data being transmitted to the playback target stored in the audio data storage unit 203 (S209). After that, the process proceeds to S210.

[0059] In S210, the main control unit 206 returns to S202 if the transmission of audio data or playback target to the pair of wireless earphones 1-1 and 1-2 has not been completed (NO in S210), and terminates this flow if it has been completed (YES in S210).

[0060] One embodiment of the present invention has been described above.

[0061] In this embodiment, when the wireless earphone 1 is playing and outputting audio data, if the temperature inside the ear and the ambient temperature indicate that there may be a change in the user's physical condition, the output of the audio data is interrupted or the output volume is reduced, and a warning message is output from the wireless earphone 1 to alert the user. Therefore, even if the user becomes engrossed in listening to audio using the wireless earphone 1, the warning message output from the wireless earphone 1 will make the user aware of any changes in their physical condition. Furthermore, in this embodiment, since the temperature inside the ear is measured by the ear-type temperature sensor 101, it is possible to measure the temperature with higher accuracy compared to a wristwatch-type wearable device that measures temperature on the arm, which is susceptible to the influence of the external environment such as ambient temperature and whose wearing state may change due to the user's daily activities.

[0062] Therefore, according to this embodiment, the body temperature of a user listening to audio with wireless earphones can be measured with higher accuracy, and the user can be alerted to any changes in their physical condition.

[0063] Furthermore, in this embodiment, the wireless earphone 1 is equipped with an ambient temperature sensor 100 to more accurately measure the ambient temperature around the user. This allows for improved accuracy in determining whether there is a possibility of a change in the user's physical condition by considering not only the user's body temperature but also the ambient temperature.

[0064] Furthermore, in this embodiment, the average value of the body temperature measurements taken in both ears by a pair of wireless earphones 1-1 and 1-2 worn on both ears is used, which allows for a more accurate understanding of the user's body temperature and, consequently, a more accurate detection of changes in the user's physical condition.

[0065] Furthermore, in this embodiment, the wireless terminal 2 stores identification information for playback targets in advance, linked to combinations of ambient temperature and body temperature conditions. If the body temperature inside the ear and ambient temperature obtained from the wireless terminal 2 while transmitting audio data to the wireless earphone 1 satisfy any combination of ambient temperature and body temperature conditions, the wireless terminal 2 transmits the playback target identified by the identification information stored in conjunction with this combination to the wireless earphone 1 instead of the audio data being transmitted. Therefore, if the measurement results indicate a possible change in the user's physical condition, audio data appropriate to that situation can be played and output from the wireless earphone 1. For example, if the user is in a situation where heatstroke should be a concern, audio data of ambient sounds that provide a sense of coolness can be played and output. If the user is in a situation where a cold or other illness should be a concern, audio data of music that can help the user relax can be played and output.

[0066] It should be noted that the present invention is not limited to the embodiments described above, and numerous modifications are possible within the scope of its essence.

[0067] For example, in the above embodiment, the wireless earphone 1 is equipped with an outside temperature sensor 100 to measure the outside temperature. However, the present invention is not limited to this. The wireless terminal 2 may be equipped with an outside temperature sensor to measure the outside temperature, or environmental sensors other than the outside temperature sensor may be equipped on the wireless earphone 1 or wireless terminal 2 to measure information other than the outside temperature related to the environment (humidity, atmospheric pressure, etc.) as information used to detect changes in the user's physical condition. Alternatively, the wireless terminal 2 may be equipped with a current location measurement function such as GPS (Global Positioning System), and the area including the current location measured by this function may be identified as the current location area. The wireless terminal 2 may then access a web server that provides weather information services connected to the network 4 via an access point 5, and obtain the outside temperature of the current location area from this web server.

[0068] Furthermore, in the above embodiment, the wireless earphone 1 may be equipped with a biometric information sensor that acquires biometric information other than body temperature (such as brain waves and blood pressure) from inside the ear, in addition to the ear-type body temperature sensor 101, and the presence or absence of changes in the user's physical condition may be determined using body temperature and other biometric information along with the ambient temperature. By doing so, changes in the user's physical condition can be predicted more accurately.

[0069] Furthermore, in this embodiment, the ear-type body temperature sensor 101 is provided on the outer peripheral surface 13 of the nozzle 11, but the ear-type body temperature sensor 101 may also be provided at another position that can be exposed from the earpiece 14. The ear-type body temperature sensor 101 may also be positioned facing the eardrum, provided that space can be secured so as not to block the nozzle. [Explanation of symbols]

[0070] 1, 1-1, 1-2: Wireless earphones 2: Wireless device 3: Media server 4: Network 5: Access point 10: Earphone body 11: Nozzle 12A: Tip of earphone body 10 12B: Rear end surface of the earphone body 10 13: Outer surface of nozzle 11 14: Earpiece 15: Outer surface of earpiece 14 16: Opening of earpiece 14 100: Ambient temperature sensor 101: Ear thermometer 102: Short-range wireless communication unit 103: Regeneration unit 104: Driver unit 105: Main control unit 200: Short-range wireless communication unit 201: Wireless Network Interface Unit 202: Human-machine interface section 203: Audio data storage section 204: Warning message / Information storage unit for playback 205: Health Monitoring Department 206: Main Control Unit

Claims

1. A wireless audio system comprising a wireless terminal that functions as an audio device, and wireless earphones that receive, play, and output audio data transmitted from the wireless terminal, The aforementioned wireless earphones An ear thermometer that periodically measures the temperature inside the ear, A measurement result transmission means for transmitting the measurement result of the temperature inside the ear by the ear-type body temperature sensor to the wireless terminal, The system includes a warning means that, when a warning message is received from the wireless terminal while the audio data is being played back or output, interrupts the output of the audio data or reduces the output volume and outputs the warning message. The aforementioned wireless terminal is An external temperature acquisition method that periodically acquires the external temperature, A body temperature receiving means for receiving the body temperature measurement result from the wireless earphone, The system includes a warning message transmission means that, when the measurement results of the ambient temperature obtained by the ambient temperature acquisition means and the body temperature received by the body temperature receiving means indicate a possible change in the user's physical condition, transmits a warning message to the wireless earphone to that effect. A wireless audio system characterized by the following features.

2. A wireless audio system according to claim 1, The aforementioned wireless terminal is It further includes an ambient temperature sensor for measuring the ambient temperature. The means for obtaining the outside temperature is, The ambient temperature measured by the ambient temperature sensor is acquired periodically. A wireless audio system characterized by the following features.

3. A wireless audio system according to claim 1, The aforementioned wireless terminal is The system further includes means for identifying the current location area, which is the area that includes the current location of the wireless terminal. The means for obtaining the outside temperature is, The system obtains the outside temperature of the current location area, which has been identified by the current location area identification means, from a web server that provides weather information services. A wireless audio system characterized by the following features.

4. A wireless audio system according to claim 1, The aforementioned wireless earphones It further includes an ambient temperature sensor that periodically measures the ambient temperature. The measurement result transmission means is The measurement result of the body temperature inside the ear by the ear-type body temperature sensor is transmitted to the wireless terminal along with the measurement result of the ambient temperature by the ambient temperature sensor. The means for obtaining the outside temperature is, The wireless terminal transmits the ambient temperature measurement result along with the body temperature measurement result. A wireless audio system characterized by the following features.

5. A wireless audio system according to claim 1, It has a pair of wireless earphones for wearing on both ears, The aforementioned body temperature receiving means is The system receives the body temperature measurement results from the pair of wireless earphones. The aforementioned warning message transmission means is If the ambient temperature acquired by the ambient temperature acquisition means and the average value of the body temperature measurements received from the pair of wireless earphones by the body temperature receiving means indicate a possible change in the user's physical condition, the warning message is transmitted to the wireless earphones. A wireless audio system characterized by the following features.

6. A wireless audio system according to any one of claims 1 to 5, The aforementioned wireless terminal is A playback target storage means in which identification information of the playback target is stored linked to a combination of external temperature and body temperature conditions, The system further includes a playback target modification means that, if the measurement results of the ambient temperature acquired by the ambient temperature acquisition means and the body temperature received by the body temperature receiving means satisfy the combination of ambient temperature and body temperature conditions, transmits to the wireless earphone the audio data to be played back, which is identified by the identification information stored in the playback target storage means and linked to that combination, in place of the audio data currently being transmitted to the wireless earphone. A wireless audio system characterized by the following features.

7. Wireless earphones that receive, play, and output audio data transmitted from a wireless terminal that functions as an audio device, An ear thermometer that periodically measures the temperature inside the ear, An ambient temperature sensor that periodically measures the ambient temperature, Measurement result transmission means for transmitting the measurement result of the temperature inside the ear by the ear temperature sensor and the measurement result of the ambient temperature by the ambient temperature sensor to the wireless terminal, The system includes a warning means that, when a warning message is received from the wireless terminal while the audio data is being played back or output, interrupts the output of the audio data or reduces the output volume and outputs the warning message. Wireless earphones characterized by the following features.

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