Geometric-based Sound Acquisition

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• Emanuel Habets, International Audio Laboratories Erlangen
• Thursday 08 December 2011, 11:00-12:00
• Room 611.

If you have a question about this talk, please contact Lauren E Noto.

Many audio applications require an efficient and robust method for the acquisition of sounds originating from a specific direction or location in an enclosure. To date, this task is often accomplished by physically steering a directional microphone or by placing a microphone at, or close to, the location of interest. In order to increase the mobility of a speaker or the flexibility in sound production, we can process the signals from single and multiple microphone arrays. Traditionally, the received microphone signals are filtered and summed in order to estimate the sound of interest. To this date, it remains a challenge to robustly estimate the filter coefficients and produce an output signal of sufficient sound quality. In this talk, a novel parametric sound acquisition method based on a recently proposed geometric model of the sound field will be presented. The model is perceptually motivated and relies on the assumption that at most one sound source is active per time-frequency instant. Using this model, a virtual microphone signal located at a pre-defined position is constructed in two stages. Firstly, the parameters of the geometric model are estimated. Secondly, the virtual microphone signal is constructed using a reference microphone signal and the estimated parameters. In addition to for example cardioid and hyper-cardioid microphones, it is possible to create a spot-microphone that captures sounds that originate from a particular space (area or volume); thereby reducing undesired sound sources and reverberation.

Short Biography Emanuël Habets was born in Maastricht, The Netherlands, in 1976. He received the B.Sc degree in electrical engineering from the Hogeschool Limburg, The Netherlands, in 1999, and the M.Sc and Ph.D. degrees in electrical engineering from the Technische Universiteit Eindhoven(TU/e), The Netherlands, in 2002 and 2007, respectively. From March 2007 until February 2009, he was a postdoctoral fellow at the Technion – Israel Institute of Technology and at the Bar-Ilan University in Ramat-Gan, Israel. In 2009, he was awarded a Marie Curie Intra-European Fellowship for Career Development. From February 2009 until November 2010, he was a Member of the Research Staff in the Communication and Signal Processing Group at Imperial College London, United Kingdom. In November 2010, he joined the International Audio Laboratories Erlangen (a joint institution of Fraunhofer IIS and the University of Erlangen-Nuremberg) as an Associate Professor in Perception-based Spatial Audio Signal Processing. Since then he is also a Chief Scientist Spatial Audio Processing at Fraunhofer IIS , Germany. His research interests are in the areas of speech and audio signal processing, and he has worked in particular on speech dereverberation, microphone array processing, echo cancellation and suppression, acoustic system identification and equalization, and localization and tracking of stationary and moving acoustic sources. Dr. Habets was a member of the organization committee of the 2005 International Workshop on Acoustic Echo and Noise Control (IWAENC) and is a member of the IEEE Signal Processing Society Technical Committee on Audio and Acoustic Signal Processing. He is a general co-chair of the International Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA) to be held in Mohonk Mountain House, New Paltz, New York in 2013.

This talk is part of the COMMSP Seminar series.

This talk is included in these lists:

• Andrea Picciau's list
• COMMSP & CP list
• COMMSP Seminar
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