Demo: Riding the non-linearities to record ultrasound with smartphones

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We demonstrate that high frequency ultrasonic sounds can be designed to become recordable by unmodified smartphone microphones, while remaining inaudible to humans. The core idea lies in exploiting non-linearities in microphone hardware with a combination of ultrasound frequencies. These frequencies can be regulated to carry data bits, thereby enabling an acoustic (but inaudible) communication channel to today's microphones. Other applications include jamming spy microphones in the environment, live watermarking of music in a concert, and even acoustic Denial-of-Service (DoS) attacks.

Original languageEnglish (US)
Title of host publicationMobiSys 2017 - Proceedings of the 15th Annual International Conference on Mobile Systems, Applications, and Services
PublisherAssociation for Computing Machinery, Inc
Number of pages1
ISBN (Electronic)9781450349284
DOIs
StatePublished - Jun 16 2017
Event15th ACM International Conference on Mobile Systems, Applications, and Services, MobiSys 2017 - Niagara Falls, United States
Duration: Jun 19 2017Jun 23 2017

Publication series

NameMobiSys 2017 - Proceedings of the 15th Annual International Conference on Mobile Systems, Applications, and Services

Other

Other15th ACM International Conference on Mobile Systems, Applications, and Services, MobiSys 2017
CountryUnited States
CityNiagara Falls
Period6/19/176/23/17

ASJC Scopus subject areas

  • Information Systems
  • Computer Networks and Communications
  • Software
  • Hardware and Architecture

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  • Cite this

    Roy, N., Hassanieh, H., & Choudhury, R. R. (2017). Demo: Riding the non-linearities to record ultrasound with smartphones. In MobiSys 2017 - Proceedings of the 15th Annual International Conference on Mobile Systems, Applications, and Services (MobiSys 2017 - Proceedings of the 15th Annual International Conference on Mobile Systems, Applications, and Services). Association for Computing Machinery, Inc. https://doi.org/10.1145/3081333.3089334