| 摘要 |
PURPOSE:To change directivity freely by providing a moving means to install plural speaker units to a prescribed position and a control section to input an optimum signal to the speaker units to the system. CONSTITUTION:A 9-channel signal line is led through a rail 2 and a controller 4 provided to each speaker 1 processes a signal and applies an optimum signal through an amplifier 5. For example as a simplest embodiment, when 9 speaker units are arranged on a line at an interval of 20cm and the same input is fed to the 9 speaker units, the service area is a range of nearly 1m in radium from the center, the sharp directivity is obtained, and when the same input is fed to the 5 speaker units being the speaker units selected at an interval, the range is spread as nearly 4m, then the directivity is controlled. |
