NOISE REDUCTION USING SEGMENTED, FREQUENCY-DEPENDENT PHASE SUPPRESSION Russian patent published in 2025 - IPC G10K11/16 

FIELD: noise reduction technologies.

SUBSTANCE: noise reduction in a signal stream containing an interference signal, called noise, is performed by obtaining a digitized noise signal and using a digital processor circuit to divide the resulting noise signal into different frequency band segments and thus generate multiple segmented noise signals. Then, individually for each segmented noise signal, the processor shifts the segmented noise signal in time by an amount depending on the selected frequency of the segmented noise signal to form a plurality of shifted segmented noise signals. The exact time shift applied to for each noise segment, it takes into account the frequency content of the segment and the processing time of the system. Amplitude scaling is applied individually for each segmented noise signal. The shifted and amplitude-scaled segmented noise signals are then combined to form a composite anti-noise signal, which is output to the signal stream to attenuate noise through destructive interference.

EFFECT: noise reduction through destructive interference.

20 cl, 22 dwg, 1 tbl