Patents Examined by Daneta R. Byrd
  • Patent number: 4559642
    Abstract: A phased-array sound pickup apparatus has an array of directional microphones having individual directivity patterns equally oriented in a given direction. The directivity patterns of the microphones combine into the main lobe of the array. A plurality of variable delay circuits are connected to be responsive respectively to individual signals from the microphones for providing incremental delays to the individual signals and combining the delayed signals for delivery as an output of the apparatus. A delay control circuit is coupled to the variable delay circuits for generating a delay control signal for controlling the amount of the incremental delays to cause the main lobe to be steered at an angle to the given direction as a function of the delay control signal.
    Type: Grant
    Filed: August 19, 1983
    Date of Patent: December 17, 1985
    Assignee: Victor Company of Japan, Limited
    Inventors: Naotaka Miyaji, Atsushi Sakamoto, Makoto Iwahara