Convolutive acoustic mixtures approximation to an instantaneous model using a stereo boundary microphone configuration

Abstract

In this work it is demonstrated that, taking into account the conditions of a convolutive mixture of acoustic signals, it is possible to configure a mixture system whose separation model accomplishes the conditions of an a instantaneous mixture. This system is achievable by using stereo boundary microphones; this type of coincident microphones can be used to uniform delays of the propagation channels and to reduce the number of reflections that characterize the impulse response of the system. By means of coincident boundary microphones techniques, instantaneous BSS algorithms are applicable, thus providing optimal results with less computational cost. This system is validated in both anechoic and reverberant chambers. © Springer-Verlag 2004.