| 摘要 |
PROBLEM TO BE SOLVED: To provide a loudspeaker system capable of loudspeaking with high quality by hands-free. SOLUTION: A plurality of microphones 1 with directivity limited therein and a plurality of speakers 6 with the directiveity limited therein are arranged by distribution on the ceiling of a conference room, A sound source position detector 2 compares input signal levels from the microphones 1, and detects the microphone in the neighborhood of a speaker as a sound source position. A speaker face direction detector 3 detects the direction of the face of the speaker, based on the frequency characteristic patterns of input signals in the microphones 1. The input signals from the microphone which is defined as the sound source position by the sound source position detector 2 are selected by an input changeover part 4 and input to a speaker output adjuster 5. A delay time, an output level, and a frequency characteristic are set in response to positions with respect to the signals to be output to the respective speakers 6, so as to be output to each speaker 6. Consequently, listening is performed with uniform sound quality at any position of the room. COPYRIGHT: (C)2006,JPO&NCIPI |
