MUMBAI, India, Feb. 6 -- Intellectual Property India has published a patent application (202541122346 A) filed by Nandha Engineering College, Erode, Tamil Nadu, on Dec. 5, 2025, for 'iot based audio communication using li-fi technology.'
Inventor(s) include S. Dinesh; R. Kabine; K. Divya; and P. T. Boomika.
The application for the patent was published on Feb. 6, under issue no. 06/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to an loT-based Li-Fi Underwater Audio Communication System designed to provide a reliable, low-cost, and energy- efficient solution for transmitting voice signals in underwater environments where traditional wireless communication methods such as Wi-Fi, Bluetooth, and RF fail due to rapid signal attenuation in water. The system uses visible light communication (VLC) as the transmission medium, in which a high- brightness LED is used to modulate and transmit audio signals optically, while a solar-panel-based optical receiver captures the incident light and converts it back into an electrical audio signal for playback. The system is implemented using easily available electronic components, including a 3.5 mm audio input jack for signal feeding, high- intensity LED transmitter, solar panel detector, amplifier circuit, speaker output, 9V DC supply, and a 7805 voltage regulator for'stable and noise-free operation. The invention additionally incorporates an microcontroller (ESP32) for monitoring transmission status, signal level, and communication distance, sending real-time data to a cloud database for visualization and performance . . . . evaluation. The design achieves underwater communication without the need for complex modulation circuits, high-frequency underwater acoustics, or expensive hardware, making it suitable for academic and experimental research environments. The prototype was successfully tested in a controlled water environment, confirming clear short-range voice transmission through water with minimal delay and acceptable audio clarity, proving the feasibility of light-based underwater communication using simple circuitry. The system also demonstrated. stable performance in varying water depth and light- scattering conditions, indicating scalability for real-time lowrange communication needs. This invention provides a portable, low-power, and cost-efficient underwater audio communication approach that can be applied to marine education projects, underwater research experiments, diver-to-diver communication, underwater robotics, and basic rescue operations, offering a practical alternative where RF and acoustic systems experience limitations."
Disclaimer: Curated by HT Syndication.
