FFT-BASED TECHNIQUE FOR ADAPTIVE DIRECTIONALITY OF DUAL MICROPHONES

摘要

The present invention comprises an adaptive directionality dual microphone system (Fig. 3) in which the time domain data from the first and second microphones (40, 42) is converted into frequency domain data (58, 60). The frequency domain data (58, 60) is then manipulated to produce a noise-canceled signal which is converted in an Inverse Fourier Transform block (62) into noise-cancel time domain data.