Improving speech privacy in personal sound zones

Authors

Jacob Donley, University of WollongongFollow
Christian H. Ritz, University of WollongongFollow
Bastiaan (Willem) Kleijn, Victoria University of WellingtonFollow

RIS ID

104800

Publication Details

J. Donley, C. Ritz & W. Kleijn, "Improving speech privacy in personal sound zones," in 2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2016, pp. 311-315.

Abstract

This paper proposes two methods for providing speech privacy between spatial zones in anechoic and reverberant environments. The methods are based on masking the content leaked between regions. The masking is optimised to maximise the speech intelligibility contrast (SIC) between the zones. The first method uses a uniform masker signal that is combined with desired multizone loudspeaker signals and requires acoustic contrast between zones. The second method computes a space-time domain masker signal in parallel with the loudspeaker signals so that the combination of the two emphasises the spectral masking in the targeted quiet zone. Simulations show that it is possible to achieve a significant SIC in anechoic environments whilst maintaining speech quality in the bright zone.