Paper: Active Speech Control using Wave-Domain Processing with a Linear Wall of Dipole Secondary Sources

Ever wondered if you could cancel someones voice without the need for a physical wall or partition? In this work presented at ICASSP 2017 in New Orleans, USA, we investigate the possibilities of cancelling speech over a loudspeaker wall. The method is not limited to speech, in-fact, it works much better for periodic signals as the non-stationarity of speech degrades the performance.

Scenario Layout - ICASSP2017IEEE_ICASSP2017_1

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Paper: Towards Real-Time Source Counting by Estimation of Coherent-to-Diffuse Ratios from Ad-Hoc Microphone Array Recordings

Blindly counting the number of speech sources (talkers) in a meeting room can be a difficult task. This paper was presented at HSCMA 2017 at the Google Offices in San Francisco and shows how using coherent-to-diffuse ratios could allow real-time source counting.

Example Layout - Towards Real-Time Source Counting by Estimation of Coherent-to-Diffuse Ratios from Ad-hoc Microphone Array Recordings
Success Rate - Towards Real-Time Source Counting by Estimation of Coherent-to-Diffuse Ratios from Ad-hoc Microphone Array Recordings

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Paper: Reproducing Personal Sound Zones Using a Hybrid Synthesis of Dynamic and Parametric Loudspeakers

A hybrid loudspeaker system consisting of dynamic point sources and parametric loudspeaker models shows great results above, generally inevitable, soundfield aliasing frequencies.
This work was presented at APSIPA ASC 2016 in Jeju, Korea.

Loudspeaker Layout - APSIPA2016
L16_Results - APSIPA2016

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Paper: Improving Speech Privacy in Personal Sound Zones

Presented at ICASSP 2016, we explore ways to improve speech privacy in multizone soundfield reproductions using intelligibility metrics, all while maintaining high speech quality.

Anechoic Results - Improving Speech Privacy in Personal Sound Zones
Multizone Soundfield Layout - Improving Speech Privacy in Personal Sound Zones

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Paper: Multizone Reproduction of Speech Soundfields – A Perceptually Weighted Approach

Recent work on perceptual soundfield reproduction for multizone soundfield cases was presented in Hong Kong at the Asia-Pacific Signal & Information Processing Association Annual Summit and Conference (APSIPA ASC).

Results - Multizone Reproduction of Speech Soundfields- A Perceptually Weighted Approach
Spatial_Error_Improvement

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