MUMBAI, India, Feb. 13 -- Intellectual Property India has published a patent application (202621000105 A) filed by National Institute Of Technology, Raipur, Chattisgarh, on Jan. 1, for 'dual-phase adaptive noise cancelling system for phonocardiogram enhancement and clinician fatigue monitoring in electronic stethoscopes.'
Inventor(s) include Dr. Suman Kumar Saha; and Dr. Dibakar Saha.
The application for the patent was published on Feb. 13, under issue no. 07/2026.
According to the abstract released by the Intellectual Property India: "The present invention provides a dual-phase adaptive noise cancelling system (100) for an electronic stethoscope. A phonocardiogram (PCG) sensing unit (1) acquires a noisy PCG signal from a patient. A bone-conducted vibration sensing unit (2) and at least one ambient-noise reference sensor (3) acquire reference noise signals. An offline processing module (5) applies metaheuristic optimization to design optimized coefficients for a PCG-denoising adaptive filter (7) and a clinician-signal adaptive filter (8), and trains a deep neural network (9) using denoised bone-conducted signals labelled with clinician fatigue states. In a real-time phase, a processing module (6) implemented on a hardware platform (11) runs adaptive filters (7, 8) with computationally light algorithms to generate a denoised PCG signal and a cleaned clinician bone-conducted signal, which is input to the trained neural network (9) to estimate clinician status. An output interface (10) presents the denoised PCG signal and clinician status, and may issue fatigue alerts and transmit data via a wireless communication module (12)."
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