Patent ID: 9253567
Filing Date: 2016-02-02
CPC Classification: H04R

Claim Text:
1. An array microphone apparatus to generate a beam forming signal, the apparatus comprising: first, second, and third omni-directional microphones to convert an audible signal into corresponding first, second, and third electrical signals, respectively, said first, second, and third omni-directional microphones arranged in a horizontal coplanar alignment, the second omni-directional microphone being disposed between the first and third omni-directional microphones; a directional microphone forming device to receive the first, second, and third electrical signals and to produce a first directional microphone signal having a bi-directional pattern; a magnitude and phase response handler device to receive the second electrical signal and to output a second directional microphone signal having an omni-directional pattern, the omni-directional pattern shifted by a prefixed value with respect to the bi-directional pattern of the first directional microphone signal; and a combining device to receive the first and second directional microphone signals and to output a combined directional microphone signal having a combined beam pattern correlated to the bi-directional pattern of the first directional microphone signal and to the omni-directional pattern of the second directional microphone signal, the combined directional microphone signal being perpendicular to the horizontal coplanar alignment of the first, second, and third omni-directional microphones.