| 摘要 |
PURPOSE:To form a sound field where a sound source can be moved by drawing a desired locus by forming an image by freely switching the phase and level of acoustic signals sent from plural electro-acoustic transducer means arranged in a hall. CONSTITUTION:A personal computer 40 displays the coordinates of speakers 391-396 in a hall on a CRT, and stores the contents of the coordinates. Also, the personal computer 40 converts the phase and level set in advance both to attenuation quantity by variable attenuators 361-366, and to delaying time generated by difference of readout addresses of RAMs 341-346, and holds a conversion result as a table corresponding to the coordinates and the frequency component of the sound source. The personal computer 40 outputs default values for a signal switching period, sending time, and the frequency component from a CD player 31 to a processor 42 as set values. Thereby, the phase and level of an analog audio signal supplied to the speakers 391-396 can be switched, and the sound field where the sound source is moved by drawing the desired locus can be formed. |
