Sound collecting device
A sound collecting device includes a microphone array having unit holders each of which a microphone unit is attached to. Connection of connecting portions formed on the holders to each other causes a directional axis of each microphone unit to be directed outward from a face of a regular polyhedron. The sound collecting devices further includes a frame disposed outside the microphone array so as to surround the microphone array and an even number of ring-shaped elastic bodies that connect a part of the frame and the connected holders at a plurality of positions such that the microphone array is positioned at a central portion of the frame, wherein a half of the even number of elastic bodies are connected twistedly in one direction from the frame toward the microphone array, and another half elastic bodies are connected twistedly in an opposite direction.
1. A sound collecting device comprising:
a microphone array having unit holders to each of which a microphone unit is attached, the unit holders having connecting portions formed thereon, the connecting portions being connected to each other such that a directional axis of each microphone unit is directed outward from a face of a regular polyhedron;
a frame member disposed outside the microphone array in a manner to surround the microphone array; and
an even number of ring-shaped elastic bodies that connect a part of the frame member and the unit holders connected to each other, at a plurality of positions therebetween such that the microphone array is positioned at a central portion of the frame member,
wherein a half of the even number of elastic bodies are connected in a manner to be twisted in one direction from the frame member toward the microphone array, and
another half of the elastic bodies are connected in a manner to be twisted in an opposite direction from the frame member toward the microphone array.
2. The sound collecting device according to claim 1 , wherein
the ring-shaped elastic bodies are disposed in a manner to straddle the connecting portions formed on the unit holders, and disposed on the unit holder side as a result of the connecting portions being connected to each other.
3. The sound collecting device according to claim 1 , wherein
the respective elastic bodies adjacent to each other in a circumferential direction are twisted in directions opposite to each other.
4. The sound collecting device according to claim 1 , wherein
the ring-shaped elastic bodies are O-rings each made of a rubber material, and each of the O-rings connects each connecting portion connecting the unit holders to each other and each locking portion formed on an inner peripheral edge of the frame member, in a circular manner, such that the microphone array is positioned at the central portion of the frame member.
5. The sound collecting device according to claim 1 , wherein
the connecting portions are formed on the unit holder at equal intervals along the circumferential direction of the unit holder.
6. The sound collecting device according to claim 4 , wherein
the frame member is formed in a flat shape, and has an arrangement space for the microphone array having a quadrilateral shape along the inner peripheral edge, and the locking portions are provided at respective longitudinal central positions of the quadrilateral inner peripheral edge.
7. The sound collecting device according to claim 6 , wherein
a windscreen capable of covering the microphone array without coming into contact is provided on each side of the flat-shaped frame member.
8. The sound collecting device according to claim 1 , wherein
A stopper formed in a ring shape at the lower bottom of the unit holders to lock the microphone unit.