Patent ID: 8180067
Filing Date: 2012-05-15
Classification: H04M,H04R

Abstract:
1. A method of selectively extracting components of an input signal comprising the steps of: detecting audible sound with a plurality of microphones in at least first and second spaced locations; generating microphone signals representative of the audible sound in the first and second spaced locations with the microphones; sampling the microphone signals with a processor; deriving with the processor from the microphone signals a plurality of spectrum signals comprising a reference signal produced from a first directional pattern, a null signal produced from a second directional pattern and a core signal produced from a third directional pattern, each of the spectrum signals being derived independent of the other spectrum signals; deriving an adjustment frequency spectrum with the processor from a spatial index derived from the null signal and the reference signal, the spatial index providing a measure of angle and distance of a plurality of sound sources from the microphones; the processor either passing or attenuating a sound source based on a direction of arrival and a distance of the sound source from the microphones by application of the adjustment frequency spectrum signal to adjust the core signal; and the processor generating an output audio signal from the adjusted core signal.