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AUDIO-BASED DEVICE DISCOVERY AND PAIRING IN SMART URBAN SPACES

In this thesis we studied plausibility of using audio to discover and pair smart devices in smart urban spaces. We created SONDI, an audio-based device discovery and pairing system using pre-existing capabilities of smart devices like phones and tablets. Special emphasis was placed to make system as unobtrusive as possible to human hearing. We designed and tested two different audio signature pairing methods and evaluated basic properties of audio signals in pairing process. We tested in the methods in variety of expected use environments and cases. Using this new found information we created a demonstration system for proximity passed secure pairing procedure with all necessary components. System is based on smart phone application which detects and identifies unique audio signatures on near real-time without interfering with normal usage of the smart device. We also created all necessary server components to collect data from our demo setup. Based on our findings we also present several suggestions how to further develop the system.