@conference {18480,
	title = {Frequency Independent Flexible Spherical Beamforming Via Rbf Fitting},
	booktitle = {2006 IEEE International Conference on Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings},
	volume = {5},
	year = {2006},
	month = {2006/05//},
	pages = {V-V - V-V},
	publisher = {IEEE},
	organization = {IEEE},
	abstract = {We describe a new method for sound analysis using a spherical microphone array without the use of quadrature over the sphere. Quadrature based solutions are very sensitive to the placement of microphones on the sphere, needing measurements to be made at exactly the quadrature positions. We propose to use fitting with band-limited radial basis functions (RBFs) rather than quadrature. Our approach results in frequency independent beamformer weights for flexibly placed microphone locations. Results are demonstrated using both synthetic and real spherical array data},
	keywords = {acoustic signal processing, array signal processing, band-limited radial basis functions, Computer science, Educational institutions, Eigenvalues and eigenfunctions, Equations, Frequency, frequency independent beamformer weights, frequency independent flexible spherical beamforming, microphone arrays, Nails, Position measurement, RBF fitting, Robustness, sound analysis, spherical array data, spherical microphone array},
	isbn = {1-4244-0469-X},
	doi = {10.1109/ICASSP.2006.1661208},
	author = {Yerukhimovich,A. and Duraiswami, Ramani and Gumerov, Nail A. and Zotkin,Dmitry N}
}
@conference {14522,
	title = {Plane-wave decomposition analysis for spherical microphone arrays},
	booktitle = {IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, 2005},
	year = {2005},
	month = {2005/10//},
	pages = {150 - 153},
	publisher = {IEEE},
	organization = {IEEE},
	abstract = {Spherical microphone arrays have attracted attention for analyzing the sound field in a region and beamforming. The analysis of the recorded sound has been performed in terms of spherical wave-functions, and recently the use of plane-wave expansions has been suggested. We show that the plane-wave basis is intimately related to the spherical wave-functions. Reproduction in terms of both representations satisfies certain band-limit criteria. We provide an error bound that shows that to reproduce the spatial characteristics of a sound of a certain frequency we need to be able to accurately represent sounds of up to a particular order, which establishes a Nyquist-like criterion. The order of the sound field in turn is related to the number of microphones in the array necessary to achieve accurate quadrature on the sphere. These results are illustrated with simulations.},
	keywords = {Acoustic propagation, Acoustic scattering, acoustic signal processing, acoustic waves, array signal processing, band-limit criteria, beamforming, Educational institutions, Fourier transforms, Frequency, Laboratories, microphone arrays, Nails, Nyquist criterion, Nyquist-like criterion, Partial differential equations, plane-wave decomposition analysis, sound field analysis, spherical microphone arrays, spherical wave-functions},
	isbn = {0-7803-9154-3},
	doi = {10.1109/ASPAA.2005.1540191},
	author = {Duraiswami, Ramani and Zhiyun Li and Zotkin,Dmitry N and Grassi,E. and Gumerov, Nail A.}
}
@conference {18461,
	title = {Efficient evaluation of reverberant sound fields},
	booktitle = {Applications of Signal Processing to Audio and Acoustics, 2001 IEEE Workshop on the},
	year = {2001},
	month = {2001///},
	pages = {203 - 206},
	publisher = {IEEE},
	organization = {IEEE},
	abstract = {An image method due to Allen and Berkley (1979) is often used to simulate the effect of reverberation in rooms. This method is relatively expensive computationally. We present a fast method for conducting such simulations using multipole expansions. For M real and image sources and N evaluation points, while the image method requires O(MN) operations, our method achieves the calculations in O(M + N) operations, resulting in a substantial speedup. Applications of our technique are also expected in simulation of virtual audio},
	keywords = {AB algorithm, acoustic signal processing, architectural acoustics, audio signal processing, Computational modeling, Computer interfaces, Computer simulation, Educational institutions, image method, image sources, Impedance, Laboratories, microphone arrays, multipole expansions, Nails, performance evaluation, reverberant sound fields, reverberation, room reverberation, simulation, Simulations, speedup, virtual audio},
	isbn = {0-7803-7126-7},
	doi = {10.1109/ASPAA.2001.969578},
	author = {Duraiswami, Ramani and Gumerov, Nail A. and Zotkin,Dmitry N and Davis, Larry S.}
}
@conference {14529,
	title = {Modeling the effect of a nearby boundary on the HRTF},
	booktitle = {2001 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP {\textquoteright}01)},
	volume = {5},
	year = {2001},
	month = {2001///},
	pages = {3337-3340 vol.5 - 3337-3340 vol.5},
	publisher = {IEEE},
	organization = {IEEE},
	abstract = {Understanding and simplified modeling of the head related transfer function (HRTF) holds the key to many applications in spatial audio. We develop an analytical solution to the problem of scattering of sound from a sphere in the vicinity of an infinite plane. Using this solution we study the influence of a nearby scattering rigid surface, on a spherical model for the HRTF},
	keywords = {Acoustic scattering, acoustic signal processing, acoustic wave reflection, acoustic wave scattering, architectural acoustics, audio signal processing, Biological system modeling, boundary effect modeling, Computer interfaces, Ear, Educational institutions, Frequency, Head related transfer function, HRTF, HUMANS, infinite plane, Laboratories, Nails, Raman scattering, rigid surface, room environment, sound pressure level, sound scattering, spatial audio, sphere, spherical model, Transfer functions, wall influence},
	isbn = {0-7803-7041-4},
	doi = {10.1109/ICASSP.2001.940373},
	author = {Gumerov, Nail A. and Duraiswami, Ramani}
}
