Acoustic Data Transmission to Collaborating Smartphones – An Experimental Study

Project Members

Roman Frigg (Disney Research Zürich, ETH Zürich)
Giorgio Corbellini (Disney Research Zurich)
Stefan Mangold (Disney Research Zurich)
Thomas R. Gross (ETH Zürich)


The acoustic capabilities (i.e. microphone) and the fast processors of modern smartphones allow for the transmission of data to groups of such devices through the audio channel. We discuss an acoustic data transmission system for broadcast communication to a multitude of smartphones without the need of a radio access point. Acoustic data transmission is particularly attractive in scenarios that involve sound systems (e.g., movie theaters or open-air film festivals). We discuss different techniques to hide data in sound tracks and how to form a microphone array from a collection of smartphones in the same location. Collaborating smartphones share (using their radio interfaces to form an ad hoc network) the received data streams to jointly correct errors. With a testbed of up to four smartphones, we demonstrate how the robustness and reliability of a downlink broadcast via an acoustic communication system can be improved by collaboration between spatially distributed devices. With field tests in different scenarios, we investigate the potential gain of the collaboration in a real environment.



Acoustic Data Transmission to Collaborating Smartphones – An Experimental Study-Thumnail

Acoustic Data Transmission to Collaborating Smartphones – An Experimental Study
April 4, 2014
IEEE/IFIP Annual Conference on Wireless On-demand Network Systems and Services (WONS) 2014
Paper File [pdf, 6.28 MB]

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