US 12,268,549 B2
Method and system for performing time-domain processing of a waveform signal
Yaroslav Shpak, Kiev (UA); and Maksim Davydov, Fanipol (BY)
Assigned to SPARROW ACOUSTICS INC., Lucasville (CA)
Filed by SPARROW ACOUSTICS INC., Lucasville (CA)
Filed on Dec. 13, 2023, as Appl. No. 18/538,252.
Application 18/538,252 is a continuation of application No. 18/086,050, filed on Dec. 21, 2022, granted, now 11,877,884.
Application 18/086,050 is a continuation of application No. PCT/CA2021/051232, filed on Sep. 7, 2021.
Claims priority of provisional application 63/076,071, filed on Sep. 9, 2020.
Prior Publication US 2024/0108305 A1, Apr. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 7/04 (2006.01); G01N 29/42 (2006.01)
CPC A61B 7/04 (2013.01) [G01N 29/42 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of time-domain processing of a waveform signal for generating a modified waveform signal, the waveform signal being representative of bodily sounds, the method executable by a processor, the waveform signal being available to the processor, the method comprising:
filtering, by employing one or more cut-off frequency values, the waveform signal for generating a first portion of the waveform signal and a second portion of the waveform signal, the first portion being in a first frequency range, the second portion being in a frequency range that is inside a human-audible frequency range;
acquiring a frequency shift value indicative of a frequency range by which the first portion is to be shifted to frequencies above the first frequency range;
generating a modulated signal using the first portion and a modulation signal, the modulation signal having a frequency equal to the frequency shift value and a time-length equal to a time-length of the waveform signal,
the modulated signal comprising a first frequency portion being in a frequency range that is above the frequency shift value and a second frequency portion being in a frequency range that is below the frequency shift value,
the one or more cut-off frequency values having been determined so that the first frequency portion and the second frequency portion are in substantially non-overlapping frequency ranges of the modulated signal,
the first frequency portion being a modified representation of the first portion of the waveform signal, the frequency range of the first frequency portion being inside the human-audible frequency range; and
generating the modified waveform using the first frequency portion of the modulated signal; and
wherein the processor is part of an electronic stethoscope.