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JPH01141500

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DESCRIPTION JPH01141500
[0001]
FIELD OF THE INVENTION The present invention relates to a microphone device for converting
sound waves into electrical signals. 2. Prior Art Microphone devices have been used as devices
for converting sound waves into electrical signals. Hereinafter, an example of a conventional
microphone device will be described with reference to the drawings. FIG. 2 shows an example of
the configuration of a conventional microphone device. In FIG. 2, 1 is a diaphragm, 2 is a coil
fixed to the diaphragm 1 and 3 is a magnet for generating a magnetic field. The operation of the
microphone device configured as described above will be described below. When the diaphragm
1 vibrates due to the sound wave, the coil 2 fixed to the signal plate 1 vibrates in the magnetic
field generated by the magnet 3 along with the vibration. The coil 2 vibrates in the magnetic field
to generate an electrical signal in the coil 2. By extracting this electric signal from the A terminal,
the sound wave is converted into an electric signal. Problems to be Solved by the Invention
However, in the above configuration, the structure of the vibration system becomes complicated
because the coil vibrates together with the diaphragm, and it is difficult to construct a
microphone device with excellent characteristics. Had. SUMMARY OF THE INVENTION In view of
the above-described problems, the present invention provides a microphone device having
excellent characteristics by simplifying the structure of a vibration system by separating a coil
and a diaphragm. Means for Solving the Problems In order to solve the above problems, the
microphone device of the present invention comprises a coil for converting a change of a
magnetic field into an electric signal, and a coil disposed in front of the coil and partially made of
a superconducting material. And a magnet for generating a magnetic field. According to the
present invention, the vibration of the diaphragm changes the magnetic field by the property of
the complete diamagnetism of the superconducting material according to the configuration
described above, and as a result, the coil generates an electrical signal to convert sound into an
electrical signal. Since only the diaphragm vibrates, the structure of the vibration system is
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simplified, and the microphone device having excellent characteristics can be easily configured.
Embodiment A microphone device according to an embodiment of the present invention will be
described with reference to the drawings. FIG. 1 shows the configuration of a microphone device
according to an embodiment of the present invention. In FIG. 1, 11 is a diaphragm, 12 is a coil
for taking out an electric signal, 13 is a magnet, and 14 is a superconducting material mounted
on a part of the 11 diaphragm. The operation of the microphone device configured as described
above will be described below with reference to the drawings.
The sound wave vibrates the diaphragm 11. The superconducting material 14 mounted on a part
of the diaphragm 11 vibrates with this vibration. The superconducting material 14 has a
magnetic flux that repels the magnetic flux generated by the magnet 13 due to the complete
diamagnetic property of the superconducting material. The magnetic flux of the superconducting
material 14 causes the superconducting material 14 to vibrate, causing the coil 2 to The
magnetic flux around the area changes. The change of the magnetic flux generates an electric
signal in the coil 2 and the electric signal is taken out from the A terminal, whereby the sound
wave is converted into the electric signal as a result. As described above, according to the present
embodiment, sound can be converted into an electric signal by a coil that converts a change in
magnetic flux into an electric signal, a diaphragm that uses a superconducting substance in part
of the coil, and a magnet that generates the magnetic flux. it can. As described above, according
to the present invention, a coil for converting a change in magnetic field into an electric signal, a
diaphragm disposed on the front of the coil, a part of which is a superconducting material, and a
magnet for generating a magnetic field By doing this, it is possible to directly change the
magnetic field by the vibration of the diaphragm generated by the sound wave and convert it into
an electric signal, so there is no need to fix the coil to the diaphragm and the structure of the
vibration system becomes simple. It is possible to easily configure a device with good
characteristics.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a block diagram of a microphone device according to an embodiment of the present
invention, and FIG. 2 is a block diagram of an example of a conventional microphone device.
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· · · · · · · · · · · · · · · · · · .... Magnets, 14 ..... Superconducting materials. Name of agent Attorney Nakao
Toshio 1 person U--Shooting Uzaka 12-Coil I 3-Magnet 4-B Conducting material 1 figure
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