Research Article
A Novel Approach to Transmit Audio Content Over a Secure Communication Channel by Using Light Optics Under the Acousto-Optic Premise
@INPROCEEDINGS{10.1007/978-3-031-37139-4_17, author={Vijay A. Kanade}, title={A Novel Approach to Transmit Audio Content Over a Secure Communication Channel by Using Light Optics Under the Acousto-Optic Premise}, proceedings={IoT as a Service. 8th EAI International Conference, IoTaaS 2022, Virtual Event, November 17-18, 2022, Proceedings}, proceedings_a={IOTAAS}, year={2023}, month={7}, keywords={LED Light Audio Content Transmission Light-based Doppler Interferometry (LDI) Sound-Field Measurements Hybrid Active Noise Cancellation Photodetector}, doi={10.1007/978-3-031-37139-4_17} }- Vijay A. Kanade
Year: 2023
A Novel Approach to Transmit Audio Content Over a Secure Communication Channel by Using Light Optics Under the Acousto-Optic Premise
IOTAAS
Springer
DOI: 10.1007/978-3-031-37139-4_17
Abstract
This research paper discloses a novel method to transmit audio content over a secure communication channel by using light optics. The proposal uses Light-based Doppler Interferometry (LDI) to measure sound-field in the room. The measured sound-field values are used to create silence bubbles at the sender and recipient side by using hybrid active noise-cancellation to ensure effective communication. An audio signal is picked up from the speaker placed at the sender’s side and is used to modulate the current source that drives a light emitting diode (LED). Upon audio-to-light conversion, the output optical signal is transmitted through the air to the intended recipient present at the other end of the room, who is some distance away from the sender. The experiments were performed using the LED light and a laser diode separately to explore different options available for indoor communication. According to the experimental results, LED light could transmit 12 dB more power than the laser diode across different audio frequencies for both setups of no air gap (i.e. 0 cm) and an air gap of 4 cm between the light source and photodetector. Also, it was identified that the laser diode transmitted consistent power for a known distance as compared to LED light. The attenuation for LED light and laser diode with respect to distance was found to be ≈5.5 dB/cm and ≈4.9 dB/cm respectively.
