Patent ID: 7995768

Claim:
A sound reinforcement system comprising: a plurality of microphones disposed in a room; a plurality of speakers disposed in the room; a speaker output adjusting device that outputs sound picked up by said plurality of microphones to said plurality of speakers at predetermined levels; a sound source position detecting device that selects a microphone corresponding to a sound source position based on input signals from said plurality of microphones, wherein each of said plurality of microphones has a limited directivity, each of said plurality of speakers has a limited directivity, and said speaker output adjusting device adjusts gains and delay times for an input signal input from a microphone corresponding to the sound source position selected by said sound source position detecting device depending on distances between said microphone and respective ones of said plurality of speakers and output the input signal to said plurality of speakers; and a speaker's face direction detecting device that detects a direction of a face of a person who is speaking based on frequency specific signal levels of input signals from said plurality of microphones, and wherein said speaker output adjusting device adjusts gains, delay times, and frequency characteristics for an input signal input from a microphone corresponding to the sound source position selected by said sound source position detecting device in accordance with at least one of distances between said microphone and respective ones of said plurality of speakers and the direction of the face detected by said speaker's face direction detecting device and output the input signal to said plurality of speakers.