JP2021019824A - Device for measuring respiratory sound in sleeping - Google Patents

Abstract

To provide a device for measuring a respiratory sound that has improved measurement accuracy without combining a plurality of sensors.SOLUTION: A device 1 for measuring a respiratory sound includes a neck band 11 composed so as to be mounted along a circumferential direction of the neck of a subject, which includes a cylindrical protrusion 44 on the inner peripheral surface 11a, where a sound guide port is open for introducing a respiratory sound of a subject. The neck band 11 includes a built-in microphone 2 for measuring the respiratory sound of the subject, and is provided with a sound guide space RS for guiding the respiratory sound introduced from the sound guide port to the microphone 2. A sound blocking material 60 is provided around the sound guide space RS for inhibiting a solid body propagation sound from the neck band from being generated in the sound guide space RS.SELECTED DRAWING: Figure 5

Description

The present invention relates to a respiratory sound measuring device during sleep of a subject.

Conventionally, methods and devices for measuring the sleep state of a subject have been known.

For example, Patent Document 1 discloses a method in which a microphone is provided around the neck of each patient to record the sound received by the microphone during the sleep of the patient.

Further, Patent Document 2 discloses a device for detecting biological information provided on the neck bunt and in contact with the neck of the subject to detect biological information when the subject wears the neckband.

Special Table 2013-504406 JP-A-2007-202939

In the neckband type breath sound measuring device, external noise and blood flow sound of the throat (heartbeat sound) may be recorded at the same time as the air flow sound of inspiration and exhalation (hereinafter, simply referred to as breath sound). External noise includes air-propagated sound propagated from the outside air and solid-propagated sound due to vibration received by the housing of the measuring device. The solid-borne sound can be generated by rubbing the measuring device with bedding, the subject's hand, or the like, for example, when the subject changes his / her body position while sleeping. Therefore, in the prior art, in order to extract only breath sounds such as snoring from the measurement data measured by the microphone, troublesome processing such as noise removal and Fourier transform is required.

In addition, when trying to accurately determine sleep apnea using a microphone, it is not enough to determine snoring, but in a normal sleep state, that is, a state with breath sounds (weak breath sounds compared to snoring). It is necessary to distinguish between sleep apnea, that is, virtually no breath sounds. Since the volume of breath sounds during normal sleep is much lower than that of snoring, the breath sounds during normal sleep may be buried in noise.

Therefore, at present, in order to improve the measurement accuracy of sleep apnea, in addition to the microphone, measurement is performed by combining a plurality of types of sensors such as an acceleration sensor, a flow sensor, and an oxygen saturation sensor. However, when measurement is performed by combining a plurality of types of sensors, there is a problem that the device becomes complicated and the burden on the subject increases.

The present invention has been made in view of the above points, and an object of the present invention is to provide a breath sound measuring device having improved measurement accuracy without combining a plurality of sensors in a neckband type respiratory sound measuring device. ..

The respiratory sound measuring device according to one aspect of the present invention is configured to be wearable along the circumferential direction of the subject's neck, and has a tubular shape having a sound guide port for introducing the subject's respiratory sound on the inner peripheral surface. A neckband provided with a protrusion is provided, and the neckband incorporates a microphone for measuring the breath sounds of the subject, and guides the breath sounds introduced from the sound guide port to the microphone. A sound space is provided, and a sound insulating material for suppressing the generation of solid-borne sound from the neckband is provided around the sound-conducting space.

According to this aspect, a tubular protrusion is provided on the inner peripheral surface of the neckband so that the breath sounds of the subject are introduced from the sound guide port of the tubular protrusion. This makes it possible to separate the sounds (for example, heart sounds) generated in the subject's body from the breath sounds. On the other hand, when a tubular protrusion is provided, vibration generated by an impact given from the outside propagates through the neckband, and solid-borne sound is generated in the sound-conducting space, which becomes noise and causes breath sounds. There is a risk that the measurement accuracy will be affected. Therefore, in the present embodiment, a sound insulating material is provided around the sound guiding space to suppress the generation of solid propagating sound in the sound guiding space. As a result, the measurement accuracy of the breath sound measuring device can be improved.

In the breath sound measuring device, the sound insulating portion may be formed of an elastic material.

The end face of the tubular protrusion on the subject side is formed of an elastic material, and when the neckband is attached to the subject's neck, it is interposed between the tubular protrusion and the subject and is in close contact with the subject's neck. A contact portion is provided.

By providing such a contact portion, it is possible to alleviate the influence on the skin of the subject and the feeling of discomfort. In addition, the adhesion to the neck of the subject can be improved. Further, when viewed from the subject side, since the end face of the tubular protrusion on the subject side is covered with the elastic material, it is possible to suppress the above-mentioned solid vibration sound from being generated in the sound guiding space.

According to the present invention, the measurement accuracy of the breath sound measuring device can be improved.

Schematic diagram showing the wearing state of the breath sound measuring device Perspective view of the breath sounds measuring device from diagonally above right Perspective view of the breath sound measuring device from the diagonally left rear side Cross-sectional view of the breath sound measuring device cut at the center in the width direction Enlarged view of the area around the measuring part of the respiratory sound measuring device shown in FIG. VI-VI line sectional view of FIG. Block diagram showing a schematic configuration of a breath sound measuring device Flow chart showing an operation example of the breath sound measuring device Flow chart showing an operation example of the breath sound measuring device Waveform diagram showing an example of measurement results of a breath sound measuring device A perspective view corresponding to FIG. 3 showing another configuration example of the breath sound measuring device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of preferred embodiments is merely exemplary and is not intended to limit the invention, its applications or its uses.

<Configuration of breath sound measuring device>
The breath sound measuring device 1 is for a subject to wear on the neck before going to bed and to measure the airflow sound of inspiration and exhalation during sleep (hereinafter, simply referred to as breath sound). Specifically, the respiratory sound measuring device 1 is a neckband type device, and is configured to be wearable along the circumferential direction of the subject's neck. The neckband 11 is formed in a substantially C shape, for example, as shown in FIG. The neckband 11 is configured to be worn by the subject from the back side of the neck toward the neck after the opening is widened to both sides, and to sandwich the subject's neck from the outside in the circumferential direction.

The material forming the neckband 11 is not particularly limited, but the subject can open the opening to both sides with both hands and wear it on the neck, and when the subject releases the hand, the inner peripheral surface 11a of the neckband 11 An elastic material having elasticity so that at least a part of the material adheres to the neck of the subject and having strength to withstand continuous use is preferable. For example, the neckband 11 can adopt an elastic structure in which a leaf spring is surrounded by an elastomer resin. However, the technique of the present disclosure is not limited to adopting a leaf spring structure for the neckband 11 or using an elastomer resin.

As shown in FIGS. 4 and 5, the neckband 11 is formed with a sound guide for introducing the breath sounds of the subject, and for measuring the breath sounds of the subject introduced from the sound guide. The microphone 2 is built-in. The neckband 11 is provided with a sound guide space RS for guiding the breath sounds introduced from the sound guide port to the microphone 2.

The microphone 2 is mounted on, for example, a substrate 50 built in one open end of the neckband 11. In the present embodiment, the tip portion of the neckband 11 in which the substrate 50 is built is referred to as a measuring unit 40. Further, the neck band 11 which is a C-shaped substantially annular portion and is configured to be worn on the neck of the subject is referred to as a wearing portion 30.

In the present invention, the microphone 2 is used in a concept that broadly includes devices, devices, and circuits that convert sound waves into electrical signals, and sound sensors such as MEMS microphones used in such devices. , The specific configuration is not particularly limited. On the other hand, in the present embodiment, for convenience of explanation, the term "microphone" is used for a sound sensor for acquiring breath sounds such as a MEMS microphone. However, it is not intended to limit the meaning of the term "microphone".

Further, in the following description, the vertical direction and the horizontal direction are defined with reference to the wearing state of the respiratory sound measuring device 1 of the subject. In addition, the front (chest) side of the subject is defined as the front, and the back side is defined as the back. Further, as shown in FIG. 1, the "subject side" is defined based on the wearing state of the respiratory sound measuring device 1, and each subject side is referred to as "back side" in the explanation of the measuring unit 40 and the substrate 50 described later. , The other side may be called "front".

As shown in FIGS. 3 to 5, the measuring unit 40 is arranged so as to face the bottom plate 41 configured to be flush with the inner peripheral surface of the neckband 11 at the subject side end portion. A top plate and a side plate connecting the bottom plate and the top plate are provided, and the top plate, the bottom plate 41, and the side plates form an accommodation sound-conducting space RS for accommodating the substrate 50 and the like.

Although specific illustration is omitted, the measuring unit 40 is integrally configured with the neckband 11 during use, while being detachable from the mounting unit 30 when the subject removes it from the neck and is not in use. You may be. 5 and 6 show a state in which the measuring unit 40 is detachably configured and the measuring unit 40 is removed from the mounting unit 30.

The substrate 50 is arranged on the bottom plate 41 (plate on the subject side) of the measuring unit 40 so as to extend along the longitudinal direction of the measuring unit 40. The substrate 50 is fixed to the surface of the bottom plate 41 of the measuring unit 40 by using an adhesive or the like. In other words, the substrate 50 is in close contact with the measuring unit 40 via an adhesive. Further, the substrate 50 is fixed from the front side by the substrate holding member 42 so as not to move.

The microphone 2 is arranged substantially in the center of the surface of the substrate 50. The substrate 50 is formed with sound guide holes 50a penetrating in the front and back directions at positions corresponding to the microphone 2. In other words, the space inside the sound guiding hole 50a forms a part of the sound guiding space RS. More specifically, the space inside the sound guiding hole 50a constitutes the sound guiding space RS1 located on the terminal side in the sound guiding direction in the sound guiding space RS. In this way, by attaching the microphone 2 to the surface of the substrate 50 and introducing the breath sounds from the back side of the substrate 50 through the sound guide hole 50a, it is possible to realize a configuration in which noise is less likely to enter.

On the substrate 50, in addition to the microphone 2, a battery 51 for supplying power to each component of the breathing sound measuring device 1, a storage unit 52 for storing the measurement result, and an external device (for example, a terminal) for storing the measurement result. A communication module 53 for transmitting to the device 80), an acceleration sensor 54 for detecting body position / movement, a connector 55 for communicating with an external device and charging the battery, and a vibrator for stimulating the subject. 56, a power button 57, a monitor lamp 58 for a subject, and the like are mounted.

The side plate of the measuring unit 40 is provided with an insertion port that opens toward the outside, and a communication / charging cable can be inserted into the connector 55 via the insertion port.

The power button 57 has, for example, a configuration in which a push button projects to the outside of the side plate of the measuring unit 40 so that the subject can turn on / off the power of the breath sound measuring device 1.

The monitor lamp 58 is composed of, for example, a light emitting diode. For example, a translucent unit made of a translucent member is provided on the side plate of the measuring unit 40, and the subject sees the light emitting state of the monitor lamp 58 through the translucent member to see the light emitting state of the monitor lamp 58. It is possible to check the power on / off status, communication status, charging status, etc.

The bottom plate 41 of the measuring unit 40 is formed with a circular opening 43 at a position corresponding to the microphone 2. On the bottom surface of the measuring unit 40, a tubular protrusion 44 having the same diameter and integrally projecting from the outer peripheral edge of the opening 43 toward the subject side is provided. In other words, the tubular protrusion 44 is provided integrally with the neckband 11 and is provided so as to project from the inner peripheral surface 11a of the neckband 11 toward the subject side.

The tubular protrusion 44 is for guiding the breath sounds of the subject introduced from the opening at the tip in the longitudinal direction (the sound guiding direction from the subject's neck toward the microphone 2). In other words, inside the openings of the tubular protrusion 44 and the bottom plate 41, a sound guiding space RS2 for guiding the breath sounds of the subject introduced from the opening at the tip of the tubular protrusion 44 in the sound guiding direction is provided.

A sound insulating material 60 is provided around the sound guiding space RS2 to prevent vibration generated by an impact or the like given from the outside from propagating through the neckband 11 and generating solid-borne sound in the sound guiding space. ing. In other words, the inner wall surface of the tubular protrusion 44 is provided with a cylindrical sound insulating material 60 having an outer diameter slightly smaller than the inner diameter of the tubular protrusion 44 and abutting on the inner wall surface of the tubular protrusion 44. The position of the lower end of the material 60 is aligned with the position of the lower end of the tubular protrusion 44. Here, the vibration of the neckband 11 is generated by rubbing the breath sound measuring device 1 with bedding, the subject's hand, or the like, for example, when the subject changes his / her body position while sleeping.

The material for forming the sound insulating material 60 is not particularly limited, but is a material that absorbs solid vibration from the tubular protrusion 44 and does not easily absorb sound waves acquired from the neck of the subject and passing through the sound guide path R2. It is preferably formed. The sound insulating material 60 is made of, for example, a material softer than the tubular protrusion 44. Specifically, as the sound insulating material 60, an elastic material such as silicon rubber can be preferably used.

It is desirable that the tubular protrusion 44 has enough rigidity to maintain its shape even when it is pressed against the subject's neck when it is attached to the subject's neck. For example, the tubular protrusion 44 is made of the same resin as the bottom plate 41. By providing the tubular protrusion 44, it is possible to secure a distance between the subject's neck and the microphone 2, and it is possible to reduce the influence of heart sounds in the measurement of breath sounds.

A flange 44a for preventing the protrusion 70, which will be described later, is continuously and integrally formed at the tip end portion (end portion on the subject side) of the tubular protrusion 44. Further, the bottom plate 41 of the measuring unit 40 is provided with a circular recess 41b having an inner diameter larger than that of the opening 43 on the surface facing the substrate 50.

The material for forming the measuring unit 40 may be the same as that of the mounting unit 30, or may be different from each other. Similarly, the materials forming the measuring unit 40 and the tubular protrusion 44 may be the same or different from each other.

A flange 61 having a size corresponding to the recessed portion 41b described above is integrally provided at the end of the sound insulating material 60 on the substrate 50 side, and the flange 61 is locked to the recessed portion 41b to insulate sound. The material 60 is prevented from falling out of the measuring unit 40. Further, the flange 61 enhances the adhesion between the bottom portion 41 and the substrate 50 and the boundary surface between the flange 61 and the substrate 50 to eliminate cavities, and further functions as a sound insulating material, and is propagated through the substrate 50. It is possible to suppress the solid vibration noise caused by the vibration.

The neckband 11 is provided with a substantially cylindrical protrusion 70 that covers the outside of the tubular protrusion 44 and projects from the end surface of the measurement unit 40 (bottom plate 41) on the subject side toward the subject side. At the tip of the protrusion 70 (the end on the subject side), a sound guide for introducing the breath sounds of the subject when the neckband 11 is attached to the subject is opened.

As shown in FIGS. 3 and 5, the sound guide port of the protrusion 70 is provided with a tapered sound collecting portion 71 whose inner diameter gradually narrows toward the sound guiding space side. The base end (the end on the substrate 50 side) of the sound collecting portion 71 is open. In other words, inside the sound collecting unit 71, a sound guiding space RS3 communicating with the sound guiding space RS2 is formed.

The protruding portion 70 is configured so as to be deformed and brought into close contact with the shape of the subject's neck by pressing the tip portion thereof against the subject's neck. That is, when the neckband 11 is attached to the subject's neck, the protruding portion 70 has a sound-conducting space in which the end on the subject side is in close contact with the subject's neck and is closed by the sound collecting portion 71 and the subject's neck. It is configured to form RS3. The protrusion 70 is provided so that the measuring unit 40 does not separate from the neck of the subject when the posture of the subject changes due to lying down or the like while the subject is sleeping, and the posture of the protrusion 70 changes. It is even better to move along the neck.

The protrusion 70 is formed of, for example, an elastic material in order to improve the adhesion to the neck of the subject. The protrusion 70 is not limited to a configuration in which the entire protrusion is made of an elastic material, and at least the contact portion 72 is formed of an elastic material that can be pressed against the neck of the subject and adhere to the subject. Is preferable.

When the neckband 11 is attached to the subject's neck, the protruding portion 70 is formed so that the tip portion (hereinafter referred to as the contact portion 72) that abuts on the subject's neck is flat and flat along the subject's neck. Has been done. As a result, the contact area between the subject's neck and the contact portion 72 can be widened, and traces of biting into the skin are unlikely to remain.

The inner diameter of the base end of the sound collecting portion 71 is aligned with the inner diameter of the tubular protrusion 44, and the sound collecting portion 71 is the end surface of the tubular protrusion 44 on the subject side in the front view of the protruding portion 70 as viewed from the subject side. Covering. As a result, the sound collecting unit 71 also functions as a sound insulating material between the tubular protrusion 44 and the sound guiding space RS3.

Further, the center positions of the base end opening of the sound collecting portion 71 and the tip opening of the tubular protrusion 44 are aligned. As a result, as shown in FIG. 5, the sound guide space RS3 of the sound collecting portion, the sound guide space of the tubular protrusion 44, and the sound guide space of the sound guide hole are arranged in a straight line and introduced from the sound guide port. The sound wave of the subject's breathing sound is configured to be propagated to the microphone 2 via the linear sound-conducting space RS.

With such a configuration, in order to avoid the influence of heart sounds, the sound guiding distance (sound guiding sound) between the subject's neck and the microphone is secured while ensuring a certain distance between the subject's neck and the microphone 2. The length of the space) can be shortened. As shown in FIG. 5, a substantially cylindrical hollow space 73 may be provided between the cylindrical wall portion of the protruding portion 70 and the cylindrical wall portion of the tubular protrusion 44. By providing such a hollow space 73, the influence on the skin of the subject and the discomfort can be alleviated. In addition, the adhesion to the neck of the subject can be improved.

The width of the sound guide is not particularly limited, but as a result of diligent studies by the inventors, the signal S / N ratio is improved by securing a wider width of the sound guide. Tend to do. On the other hand, it is necessary to secure a predetermined height and width as the sound guiding space RS3 in the sound collecting unit 71, and it is preferable that the measuring unit 40 is thin so as not to disturb the subject. It is desirable to set the width of the opening of the sound guide and the height of the sound collecting unit 71 in consideration of them comprehensively.

Further, the protruding portion 70 is provided with a claw portion formed in an annular shape for hooking between the tubular protrusion 44 and the bottom plate 41, which is continuously integrally provided with the sound collecting portion 71. With such a configuration, the protruding portion 70 can be easily removed from the measuring portion 40 and replaced.

FIG. 7 is a block diagram showing a schematic configuration of the respiratory sound measuring device 1. In FIG. 7, the configurations common to those in FIGS. 1 to 6 are designated by a common reference numeral.

The respiration sound measuring device 1 includes a control unit 59 that controls the operation of the device as a whole. The control unit 59 is, for example, a microprocessor, and has a CPU, a memory, and the like. The control unit 59 receives power from the battery 51 and operates based on a program or the like stored in the storage unit 52. The specific operation will be described in "Operation of the breath sound measuring device" described later. The control unit 59 is arranged, for example, in the accommodation space of the measurement unit 40, and is mounted on the substrate 50, for example.

<Operation of breath sound measuring device>
Next, the operation of the respiratory sound measuring device 1 will be specifically described with reference to FIGS. 8A and 8B.

First, when the power button 57 is pressed and held while the power is off, the breath sound measuring device 1 is activated (step S10). Next, the control unit 59 confirms whether or not the battery 51 has a remaining amount (step S11). When the remaining amount of the battery 51 is insufficient (NO in S11), the control unit 59 turns off the power of the respiration sound measuring device 1 again and ends the process.

On the other hand, when the remaining battery 51 is sufficiently remaining (YES in S11), the control unit 59 determines whether or not the subject wears the breath sound measuring device 1 on the neck within a predetermined time (step S12). .. Whether or not the breath sound measuring device 1 is worn on the neck of the subject is determined based on, for example, the measurement results of the acceleration sensor 54 and the microphone 2. If the attachment of the respiration sound measuring device 1 cannot be confirmed even after the lapse of a predetermined time (NO in S12), the control unit 59 turns off the power of the respiration sound measuring device 1 and ends the process. The predetermined time for confirming the mounting is not particularly limited, but is, for example, about several minutes.

When the attachment of the sound absorption measuring device 1 is confirmed (YES in S12), the control unit 59 sets a timer for measuring the breath sounds (step S13). Here, for example, three different times t1, t2, t3 (t1 <t2 <t3) are set.

Then, it is confirmed again that the sound absorption measuring device 1 is attached to the neck of the subject (step S14), and it is confirmed that the power button 57 is not pressed and held (step S15), and the breath sound measurement step is performed. Enter (step S16).

In steps S17 to S19, the control unit 59 detects the body position of the subject based on the acceleration data obtained from the acceleration sensor 54 at predetermined time t1 intervals.

In steps S21 to S23, the control unit 59 determines the presence or absence of snoring at predetermined time t2 (t1 <t2) (step S22) and determines the presence or absence of sleep apnea (step S23). ..

FIG. 9 shows an example of measurement results of (a) breath sounds during normal sleep (hereinafter referred to as normal breath sounds) and (b) breath sounds when the subject is snoring (hereinafter referred to as snoring sounds). Shown. FIG. 9 shows the measurement result for about 30 seconds, and the respiratory sound is amplified about 350 times by using an amplifier circuit (not shown). As shown in FIGS. 9A and 9B, since the normal breath sounds and the snoring sounds are significantly different in volume, the presence or absence of snoring can be determined relatively easily. The measurement time and the measurement magnification shown here are merely examples, and may have different times and magnifications, and there is no intention of limiting the scope of the present invention to these numerical values. The same applies to the numerical values used in other places in the present embodiment.

On the other hand, it is necessary to judge whether or not sleep apnea occurs temporarily when breathing is stopped. Therefore, for example, the respiratory sound measuring device 1 acquires the respiratory sound data during sleep by increasing the amplification factor as compared with the time of determining the presence or absence of snoring. In FIG. 9, (c) shows the measurement result of the subject's normal breath sounds, and (d) shows the measurement result of the breath sounds when there is an apnea period during sleep (hereinafter referred to as apnea breath sounds). There is. In FIGS. 9C and 9D, the amplification factor is increased by about 25 times as compared with FIGS. 9A and 9B. That is, the breath sounds are amplified about 9000 times.

The specific method for determining the presence or absence of sleep apnea is not particularly limited, but for example, the breath sounds measured as shown in FIGS. 9 (c) and 9 (d) are breathed during normal sleep. When the period during which the sound data is below the predetermined threshold continues for a predetermined period, it is determined that the subject is in a state of sleep apnea.

In the next step S24, it is confirmed in steps S22 and S23 whether or not snoring or sleep apnea is determined. If it is determined in step S24 that there was snoring or sleep apnea, the control unit 59, for example, activates and vibrates the vibrator 56 in order to change the body position of the subject (step S25). At the same time, the time t2, which is the basis for determining whether or not to determine step S21, is reset (step S26).

In the next steps S27 to S29, the control unit 59 saves the above determination result and the measurement data of each sensor every predetermined time t3. The storage destination is not particularly limited, but is stored in, for example, a storage unit 52 built in the respiratory sound measuring device 1. Further, data is transmitted to an external terminal device 80 or the like via the communication module 53 every predetermined time t3, and is stored in a storage unit in the terminal device 80 or displayed on the display screen 81 of the terminal device 80. It may be.

The process of step S14 to step S29 is repeated, and when a predetermined measurement time elapses, a YES determination is made in step S30, and the control unit 59 turns off the power of the respiratory sound measuring device 1 and ends the process.

As described above, in the present embodiment, the tubular protrusion 44 is provided on the inner peripheral surface 11a of the neckband 11 so that the breath sounds of the subject are introduced from the sound guide port of the tubular protrusion 44. This makes it possible to separate the sounds (for example, heart sounds) generated in the subject's body from the breath sounds. On the other hand, when the tubular protrusion 44 is provided, vibration generated by an impact or the like given from the outside propagates in the neckband 11, and there is a possibility that solid-borne sound is generated in the sound-conducting space RS. Therefore, in the present embodiment, the sound insulating material 60 is provided around the sound guiding space RS. As a result, it is possible to suppress the generation of solid-borne sound in the sound-conducting space RS.

<Other Embodiments>
In the above embodiment, the shape of the neckband 11 is not limited to a substantially C-shape. The neckband 11 may be attached to the neck of the subject and configured so that the breath sounds of the neck of the subject can be measured by the microphone 2. For example, a neckband made of a soft material such as vinyl or fiber may be used. It may be wrapped around the neck and locked with a locking tool such as a hook-and-loop fastener or an adjuster buckle.

Further, in the above embodiment, the neckband 11 is provided with a substantially cylindrical protrusion 70, but the present invention is not limited to this. For example, as shown in FIG. 10, the protruding portion 70 may be omitted, and the sound collecting portion 71 may be provided on the bottom plate 41 of the measuring portion 40 to improve the measurement accuracy of the breath sound measuring device 1. The same effect as that of the above embodiment can be obtained. In this case, the bottom plate 41 of the measuring unit 40 also functions as a contact portion.

However, by providing the protruding portion 70, the sound collecting portion 71 can be more stably brought into close contact with the subject's neck regardless of the shape of the subject's neck, and the close contact can be enhanced.

Further, in the above embodiment, the measuring portion 40 is provided with the tubular protrusion 44, but the tubular protrusion 44 may be omitted. In this case, for example, the base end portion of the sound collecting portion 71 and the sound guide hole 50a of the substrate 50 are directly connected, that is, the breath sounds introduced from the sound guide port are transmitted from the sound guide space RS3 to the sound guide space. Introduced in RS1 and guided to microphone 2.

The present invention is useful mainly as a device for measuring the sleep state of a subject at home or the like.

1 Respiratory sound measuring device 2 Microphone 11 Neckband 44 Cylindrical protrusion 60 Sound insulating material 72 Contact part RS Sound guiding space

Claims (3)

It is configured to be wearable along the circumferential direction of the subject's neck, and has a neckband with a tubular protrusion on the inner peripheral surface that has a sound guide for introducing the subject's breath sounds.
The neckband is provided with a microphone for measuring the breath sounds of the subject, and a sound guide space for guiding the breath sounds introduced from the sound guide port to the microphone.
A respiratory sound measuring device characterized in that a sound insulating material for suppressing the generation of solid-borne sound from the neckband is provided around the sound-conducting space. In the respiratory sound measuring device according to claim 1,
The sound insulation material is a breath sound measuring device characterized in that it is made of an elastic material. In the respiratory sound measuring device according to claim 1,
The end face of the tubular protrusion on the subject side is formed of an elastic material, and when the neckband is attached to the subject's neck, it is interposed between the sound guide and the subject and is in close contact with the subject's neck. A respiratory sound measuring device characterized in that a contact portion is provided.

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