Estimation of the direct-to-reverberant Energy Ratio using a spherical microphone array

This paper proposes a practical approach to estimate the direct-to-reverberant energy ratio (DRR) using a spherical microphone array without having knowledge of the source signal. We base our estimation on a theoretical relationship between the DRR and the coherence estimation function between coincident pressure and particle velocity. We discuss the proposed method's ability to estimate the DRR in a wide variety of room sizes, reverberation times and source receiver distances with appropriate examples. Test results show that the method can estimate the room DRR for frequencies between 199 - 2511 Hz, with $\pm$ 3 dB accuracy.

[1]  Boaz Rafaely,et al.  Coherent signals direction-of-arrival estimation using a spherical microphone array: Frequency smoothing approach , 2009, 2009 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics.

[2]  B.C. Wheeler,et al.  Acoustic scene analysis using estimated impulse responses , 2003, The Thrity-Seventh Asilomar Conference on Signals, Systems & Computers, 2003.

[3]  Martin Kuster.  Estimating the direct-to-reverberant energy ratio from the coherence between coincident pressure and particle velocity. , 2011, The Journal of the Acoustical Society of America.

[4]  Alastair H. Moore,et al.  The ACE challenge — Corpus description and performance evaluation , 2015, 2015 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA).

[5]  Thushara D. Abhayapala,et al.  Wideband Beamspace Processing Using Orthogonal Modal Beamformers , 2011, J. Signal Process. Syst..

[6]  Alastair H. Moore,et al.  Multiple source localisation in the spherical harmonic domain , 2014, 2014 14th International Workshop on Acoustic Signal Enhancement (IWAENC).

[7]  Thushara D. Abhayapala,et al.  Coherent broadband source localization by modal space processing , 2003, 10th International Conference on Telecommunications, 2003. ICT 2003..

[8]  Tiago H. Falk,et al.  Temporal Dynamics for Blind Measurement of Room Acoustical Parameters , 2010, IEEE Transactions on Instrumentation and Measurement.

[9]  Thushara D. Abhayapala,et al.  Reproduction of a plane-wave sound field using an array of loudspeakers , 2001, IEEE Trans. Speech Audio Process..

[10]  Martin Cooke,et al.  Binaural Estimation of Sound Source Distance via the Direct-to-Reverberant Energy Ratio for Static and Moving Sources , 2010, IEEE Transactions on Audio, Speech, and Language Processing.

[11]  Y. Haneda,et al.  Estimating Direct-to-Reverberant Energy Ratio Using D/R Spatial Correlation Matrix Model , 2011, IEEE Transactions on Audio, Speech, and Language Processing.

[12]  Holography Book,et al.  Fourier Acoustics Sound Radiation And Nearfield Acoustical Holography , 2016 .