MUMBAI, India, Nov. 21 -- Intellectual Property India has published a patent application (202521100866 A) filed by L. D. College Of Engineering; Prof. Dr. Chirag S. Thaker; Prof. Dr. Amita V. Shah; Prof. Hetal B Pandya; Manav K. Shah; Harsh N. Parmar; Amankumar A. Bhatt; Smit V. Mehta; Ujash P. Solanki; and Dipen H. Magdani, Ahmedabad, Gujarat, on Oct. 17, for 'presence detection using ambient and ultrasonic acoustic features.'
Inventor(s) include Prof. Dr. Chirag S. Thaker; Prof. Dr. Amita V. Shah; Prof. Hetal B Pandya; Manav K. Shah; Harsh N. Parmar; Amankumar A. Bhatt; Smit V. Mehta; Ujash P. Solanki; and Dipen H. Magdani.
The application for the patent was published on Nov. 21, under issue no. 47/2025.
According to the abstract released by the Intellectual Property India: "Presence detection using ambient and ultrasonic acoustic features The present invention discloses a system and method for accurate and secure presence verification based on acoustic signals. A system discloses a source device which generates a dynamic, session-specific ultrasonic chirp, inaudible to humans, and simultaneously records ambient audio. Target devices capture the chirp along with ambient acoustic features during a defined interval within the same environment. Both source and target recordings are processed using feature extraction techniques to derive unique acoustic fingerprints. Furthermore, verification is also performed by comparing acoustic similarity between recordings and confirming the detection of the dynamic chirp in target device audio. Device-side timestamps ensure accurate synchronization despite network delays. Presence is authenticated only when both ambient similarity and chirp detection criteria are satisfied. The present invention operates with standard microphones and speakers which offers a hardware-independent, cost-effective and privacy-preserving solution for applications requiring physical co-location without reliance on GPS, Wi-Fi or specialized biometric systems."
Disclaimer: Curated by HT Syndication.
