JP2022133696A - Living body sound detection device - Google Patents

Abstract

To provide a living body sound detection device that can collect living body information, and is superior in wearing performance.SOLUTION: A capacitive microphone 2A is included in a support arm 1. This capacitive microphone 2A includes a convex-shaped vibrating diaphragm curved in an opening of a sound collection part, and converts a living body sound into a living body sound signal from the pressure change in the sound collection part generated because the vibrating diaphragm vibrates. The curved convex-shaped vibrating diaphragm holds its shape while coming in contact with a user's neck.SELECTED DRAWING: Figure 1

Description

The present invention relates to a body sound detection device that can be worn on the neck of a user.

A body sound detection device that is worn on the user's neck and collects body sounds converts body sounds into body sound signals using a microphone placed on a support arm, and outputs the body sound signals from a body sound signal output unit via wired or wireless communication. do. A body sound detection device of this type is described in Patent Document 1.

For example, FIG. 3 shows a body sound detection device 10 having a C-shaped support arm. The body sound detection device 10 shown in FIG. 3 is worn on the neck of a user, and two microphones 2 are arranged in a support arm 1 that abuts on the front side of the neck (near the vocal cords). is doing. The support arm 1 is mounted so as to press the microphone 2 against the user's neck while being placed on the user's shoulder.

When the microphone 2 is a capacitive microphone, as shown in FIG. By detecting this pressure change with the capacitive transducer 5, the body sound is converted into a body sound signal.

Japanese Patent Application No. 2007-202939

By the way, in the body sound detecting device shown in FIGS. 3 and 4, if the user's neck and the planar vibrating membrane 4 do not surely contact each other, it becomes difficult for the capacitive transducer 5 to detect the body sound. Specifically, if there is a gap between the neck of the user and the vibrating membrane 4, or if the neck is in contact with only a part of the vibrating membrane 4, body sounds may not be detected. , the signal level of detected body sounds becomes small. If the support arm 1 is configured to strongly press the user's neck in order to eliminate such a problem, the wearability will be deteriorated. SUMMARY OF THE INVENTION In view of such circumstances, it is an object of the present invention to provide a body sound detection device capable of collecting biological information and excellent in wearability.

In order to achieve the above object, the invention according to claim 1 of the present application provides a support arm that can be attached to the neck of a user, and a body sound that is arranged on the support arm and is in contact with the neck and obtained from the neck. into a body sound signal, and a body sound signal output section for outputting the body sound signal, wherein the microphone has a curved convex vibrating membrane at an opening of a sound collecting section. comprising a capacitive microphone that converts the body sound into the body sound signal from a pressure change in the sound collecting part caused by the vibration of the vibrating membrane, and the vibrating membrane is in contact with the user's neck. It is characterized by retaining the curved convex shape in a state.

The invention according to claim 2 of the present application is directed to the body sound detection device according to claim 1, wherein the deformation of the vibrating membrane caused by contact of the vibrating membrane with the neck of the user causes the capacitive microphone to operate. Characterized by deformation.

In the body sound detection device of the present invention, the vibrating membrane has a curved convex shape, and has a structure that protrudes from the surface of the support arm 1 . There is no need to press the neck of the body, so it is easy to wear.

1 is an explanatory diagram of a body sound detection device according to an embodiment of the present invention; FIG. FIG. 4 is an explanatory diagram of a microphone of the body sound detection device according to the embodiment of the present invention; 1 is an explanatory diagram of a conventional body sound detection device; FIG. FIG. 10 is an explanatory diagram of a microphone of a conventional body sound detection device;

The body sound detection apparatus of the present invention is worn on the neck of a user, and the user's body sound is converted into a body sound signal by a microphone 2A having a capacitive transducer 5 and output. Here, it is assumed that the body sound detection device is worn so that the curved convex vibrating membrane 4A is in contact with the user's neck. Here, it is sufficient for the support arm 1 to apply pressure to the neck to such an extent that the vibrating membrane 4A protruding from the support arm 1 contacts the neck, and the support arm 1 does not need to press the neck. Since the support arm 1 does not strongly press the neck of the user in this manner, the body sound detecting device is extremely comfortable to wear. The body sound detection device of the present invention will be described in detail below.

An embodiment of the present invention will be described. FIG. 1 is an explanatory diagram of a state in which a body sound detection device 10A of this embodiment is attached to the neck of a user. FIG. 2 is an explanatory diagram of the microphone 2A of this embodiment. As shown in FIG. 1, the body sound detection device 10A of this embodiment has a C-shaped support arm 1 with a part opened so that attachment and detachment can be facilitated. Also, the support arm 1 is provided with a pair of protrusions 6 . Although the projection 6 is not essential, the provision of the projection 6 enables stable mounting on the user's neck. In addition to the shape shown in FIG. 1, the protrusion 6 has, for example, a structure in which the portion that contacts the user's neck and the portion that supports it are not fixed, and the contact portion is formed along the shape of the neck. A configuration in which the contact angle is changed is preferable because more stable mounting becomes possible.

It is preferable that the support arm 1 be deformable so that the opening dimension is widened in order to facilitate attachment and detachment. In addition, the support arm 1 has a hollow structure, so that a signal processing unit of the microphone 2A that detects body sound and converts it into a body sound signal and a body sound signal output unit that outputs the body sound signal are arranged inside. can do. Of course, the signal processing section, the body sound signal output section, and the like may be arranged in a device (a device worn by the user of the body sound detection device in a pocket or the like) connected to the microphone by a wire.

The microphone 2A of this embodiment differs from the diaphragm 4 of the conventional body sound detection device described in FIG. 4 in that the diaphragm 4A has a curved convex shape as shown in FIG. The curved convex vibrating membrane 4A is configured to maintain its shape even when it is in contact with the user's neck. Alternatively, even if deformation occurs, the material and shape should be selected so that the deformation is minimal.

This prevents damage to the capacitive transducer 5 due to deformation of the vibrating membrane 4A when the vibrating membrane 4A is brought into contact with the neck, and prevents unnecessary noise from being generated due to rapid pressure changes in the sound collecting section 3. This is to prevent

Further, by forming the vibrating membrane 4A into a convex shape, the convex vibrating membrane 4A penetrates deeply into the user's neck, which is preferable because the support arm 1 does not shift due to the user's movement. In addition, the pressure of the support arm 1 contacting the neck can be reduced, resulting in a structure excellent in wearability. In order to suppress the input of environmental noise, it is preferable to adjust the pressure so that the vibrating membrane 4A and the surface of the support arm 1 surrounding it come into contact with the neck.

The vibrating membrane 4A in contact with the user's neck vibrates due to body sounds (speech, breathing sound, heartbeat sound, etc.) from the neck. The vibration of the vibrating membrane 4A changes the pressure in the sound collector 3, and the capacitive transducer 5 outputs a body sound signal according to this pressure change. This body sound signal is transmitted to the outside by a signal processing unit and a body sound signal output unit (not shown) so that the body sound can be detected.

For example, if a body sound detection device that detects voice is used, it can be used as a communication device with a person wearing the body sound detection device. Also, if a body sound detection device that detects breathing sounds and heartbeat sounds is used, it can be used as a monitoring device for workers working in harsh environments.

The body sound detection device of the present invention is not limited to the configuration including the microphone 2A having the capacitive transducer 5, and other detection devices (a temperature sensor for measuring body temperature and ambient temperature, a humidity sensor, an illuminance sensor, a , an ultraviolet sensor, etc., it is possible to configure various body sound detection devices.

Although the embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to the above embodiments. For example, the shape of the support arm 1, the curved convex shape of the diaphragm 4A, and the like can be changed as appropriate.

1: support arm, 2, 2A: microphone, 3: sound collector, 4, 4A: vibrating membrane, 5: capacitive transducer, 6: protrusion, 10, 10A: body sound detection device

Claims (2)

a support arm that can be worn on the neck of a user; a microphone that is arranged on the support arm and contacts the neck to convert the body sound obtained from the neck into a body sound signal; and outputs the body sound signal. A body sound detection device comprising a body sound signal output unit that
The microphone is a capacitive type that includes a curved convex vibrating membrane at the opening of the sound collecting section, and converts the body sound into the body sound signal from the pressure change in the sound collecting section caused by the vibration of the vibrating membrane. consists of a microphone,
The body sound detecting device, wherein the vibrating membrane maintains the curved convex shape while being in contact with the user's neck. The body sound detection device according to claim 1,
A body sound detection device, wherein the deformation of the vibrating membrane caused by the vibrating membrane coming into contact with the user's neck is a deformation that allows the capacitive microphone to operate.

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