MUMBAI, India, June 30 -- Intellectual Property India has published a patent application (202641074231 A) filed by Vellore Institute Of Technology on June 15, 2026, for “a System For Acoustic Proximity-Based Session Management Using Doppler Effect”.
Inventors include Dr. Muthunagai S U; Adharsh Arvinth; and Shreeganth T.
The application for the patent was published on June 26, 2026, under issue no. 26/2026.
Abstract: The present invention relates to a system and method for acoustic proximity-based session management using the Doppler effect are disclosed. The system includes a speaker configured to emit an ultrasonic or near-ultrasonic continuous wave signal and a microphone configured to capture reflected signals from the surrounding environment. The captured signals are acquired through a low-latency driver interface and processed using a signal processing pipeline comprising windowing and spectral transformation to obtain a frequency-domain representation. A dual-band energy computation module analyzes Doppler-shifted frequency components relative to a baseline signal to detect variations caused by user proximity or motion. A decision logic controller determines the presence or absence of a user based on the computed energy variations. An operating system integration layer automatically triggers session management actions, including locking, unlocking, or maintaining an active session, based on the detected user activity. The method includes generating an acoustic signal, capturing and processing reflections, computing Doppler-related energy variations, and controlling session states accordingly. The invention enables a non-intrusive, privacy-preserving, and efficient approach to real-time session management using existing audio hardware. Fig 1 to 13.
Disclaimer: Curated by HT Syndication.
