| 摘要 |
PROBLEM TO BE SOLVED: To provide a non-directive microphone capable of preferably canceling an output signal. SOLUTION: The sound field microphone includes at least four individual pressure-gradient microphones called capsules (2, a, b, c, d, e, f, g, h, i, j, k, l), and back sides are arranged in space on tangential surfaces of an imaginary sphere with the largest possible symmetry, i.e. on the surfaces of a virtual essentially regular polyhedron. This microphone is characterized in that, in the inside of the virtual polyhedron (4), a solid body (8) is arranged, and the volume of the solid body is greater than 1% of the volume of virtual polyhedron (4). COPYRIGHT: (C)2007,JPO&INPIT
|
