Cocktails, but no party: Multipath-enabled private audio

Yu Jeh Liu, Jonah Casebeer, Ivan Dokmanic

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

Abstract

We describe a private audio messaging system that uses echoes to unscramble messages at a few predetermined locations in a room. The system works by splitting the audio into short chunks and emitting them from different loudspeakers. The chunks are filtered so that as they echo around the room, they sum to noise everywhere except at a few chosen focusing spots where they exactly reproduce the intended messages. Unlike in the case of standard personal audio zones, the proposed method renders sound outside the focusing spots unintelligible. Our method essentially depends on echoes: the room acts as a mixing system such that at given points we get the desired output. Finally, we only require a modest number of loudspeakers and only a few impulse response measurements at points where the messages should be delivered. We demonstrate the effectiveness of the proposed method via objective quantitative metrics as well as informal listening experiments in a real room.

Original languageEnglish (US)
Title of host publication16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages186-190
Number of pages5
ISBN (Electronic)9781538681510
DOIs
StatePublished - Nov 2 2018
Event16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018 - Tokyo, Japan
Duration: Sep 17 2018Sep 20 2018

Publication series

Name16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018 - Proceedings

Other

Other16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018
CountryJapan
CityTokyo
Period9/17/189/20/18

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Keywords

  • Echoes
  • Intelligibility
  • Multipath
  • Noise
  • Private audio
  • Secure communication
  • Sound zones

ASJC Scopus subject areas

  • Signal Processing
  • Acoustics and Ultrasonics

Cite this

Liu, Y. J., Casebeer, J., & Dokmanic, I. (2018). Cocktails, but no party: Multipath-enabled private audio. In 16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018 - Proceedings (pp. 186-190). [8521292] (16th International Workshop on Acoustic Signal Enhancement, IWAENC 2018 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IWAENC.2018.8521292