| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound field sound collection playback system capable of reproducing a sound field with high accuracy when a circular microphone array speaker array is used.SOLUTION: In the sound field sound collection playback system, at least two microphones are disposed at a circumference of a radius Rof a first space having a center at an axis of a cylindrical sound absorbing material baffle of a radius Rand whose circumferential direction is a circumferential direction of the baffle, and at least two speakers are disposed at a circumference of a virtual cylinder of a radius Rin a second space different from the first space. By denoting a distance from a center of the secondary sound source circle to a point where an amplitude is made to be coincident as R, a post filter processing signal D∼(ω) is generated with respect to a time space frequency region signal P∼(ω) generated on the basis of a signal sound collected by the microphones by applying a filter F∼(ω) defined by a specific formula. |
