| 摘要 |
PURPOSE:To obtain an excellent location sense on a wide listening position in a nearby sound field by preparing three speakers facing the front, inner side and outer side with respect to one channel, constituting similarly with respect to other channels and adjusting the amplitude and phase of a signal fed to respective speakers. CONSTITUTION:When a right channel signal is noticed, since a level difference due to distance attenuation depending on the difference in path length between a speaker 9 and a listening position 21 and between a speaker 17 and a listening position 21 exists, an amplifier 6 is adjusted to correct the level difference thereby radiating a sound wave toward the listening position 21. Furthermore, with respect to a speaker 7, it is directed slightly outward to the listening position 19 and the amplifier 4 is adjusted to cause the presence in the listening position 19. Since the distance attenuation and time difference exist depending on the difference in the path length between the speaker 8 and the listening position 19 and between the speaker 16 and the listening position, a time delay is given by a delay device 3 to correct them and the level is corrected by an amplifier 5 to obtain the location sense. |
