| 摘要 |
A two-channel sound recording and play-back system for providing a holophonic reproduction or play-back of sounds is herein disclosed. The two-channel recording system comprises cables and electronic apparatus for providing a stereophonic type of recording, where a plurality of microphones are arranged in an adjoining mutually angled relationship so as to provide, during the recording operation, a stereophonic effect due to phase differences at each frequency and an intensity difference at least for middle-high acoustic frequencies. The two-channel sound play-back system comprises, in addition to a source and a two-channel amplifying system, a plurality of diffusers arranged to corners of a parallelogram, a listening point being preferably arranged at the center of said parallelogram, the front or rear diffusers receiving the recorded signal without modifications, whereas, respectively, the rear or front diffusers receive a signal the sound pressure of which is adjusted, by a perspective corrector, from -15 dB to +9 dB, as modified in the frequency response thereof and with a delayed emission, so as to broaden the sound range up to 360°, thereby providing a sound holophonic play-back. |
