A MICROPHONE ARRAY FOR MULTIMEDIA WORKSTATIONS

A microphone array devoted to multimedia workstations is presented. Th is array, which was designed according to basic beam-forming principle s, is made of subarrays, each characterized by a specific intersensor spacing. It is shown that accurate control of the directivity can be a chieved over a given range of frequencies by combining these subarrays in a proper way. The measurement of its acoustic behavior and its use in real multimedia applications have shown that in spite of its low c ost, this array yields a great improvement in speech quality when comp ared to a single microphone.