Microphone apparatus
View Patent ↗A microphone unit ( 1 ) has a first vibration plate. A support member ( 6 ) supports the microphone unit ( 1 ). A second vibration plate ( 5 ) is fixed to the support member ( 6 ) at a predetermined distance from the first vibration plate. An armoring body ( 2 ) covers the microphone unit ( 1 ), the support member ( 6 ) and the second vibration plate ( 5 ). A space surrounded by the support member ( 6 ), the first vibration plate and the second vibration plate ( 5 ) is a closed space (S 1 ) with air kept therein.
1. A microphone apparatus comprising:
a microphone unit that has a first vibration plate to vibrate in reception of a sound wave from outside and converts the vibration of the first vibration plate to an electric signal;
a support member that supports the microphone unit;
a second vibration plate that is fixed to the support member at a predetermined distance from the first vibration plate; and
an armoring body that covers the microphone unit, the support member and the second vibration plate,
wherein a space surrounded by the support member, the first vibration plate and the second vibration plate is a closed space with air kept therein.
2. The microphone apparatus according to claim 1 ,
wherein the second vibration plate is fixed to the support member in parallel to the first vibration plate.
3. The microphone apparatus according to claim 1 ,
wherein the armoring body is a microphone windshield that is porous and capable of transmitting a sound wave.
4. The microphone apparatus according to claim 3 ,
wherein the microphone windshield has a cavity to house the microphone unit, the support member and the second vibration plate.
5. The microphone apparatus according to claim 4 ,
wherein the second vibration plate is in non-contact with the inside of the microphone windshield which is the top of the cavity.
6. The microphone apparatus according to claim 4 ,
wherein the microphone windshield is formed in a dome shape and the second vibration plate is provided at a position opposed to the top of the microphone windshield.