title: A model for the temporal evolution of the spatial coherence in decaying reverberant sound fields.
abstract: Reverberant sound fields are often modeled as isotropic. However, it has been observed that spatial properties change during the decay of the sound field energy, due to non-isotropic attenuation in non-ideal rooms. In this letter, a model for the spatial coherence between two sensors in a decaying reverberant sound field is developed for rectangular rooms. The modeled coherence function depends on room dimensions, surface reflectivity, and orientation of the sensor pair, but is independent of the position of source and sensors in the room. The model includes the spherically isotropic (diffuse) and cylindrically isotropic sound field models as special cases.
authors.affiliation: Multimedia Communications and Signal Processing, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstr. 7, 91058 Erlangen, Germany samnees@gmail.com, schwarz@lnt.de, wk@lnt.de.
authors.forename: Sam
authors.initials: S
authors.lastname: Nees
authors.affiliation: Multimedia Communications and Signal Processing, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstr. 7, 91058 Erlangen, Germany samnees@gmail.com, schwarz@lnt.de, wk@lnt.de.
authors.forename: Andreas
authors.initials: A
authors.lastname: Schwarz
authors.affiliation: Multimedia Communications and Signal Processing, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstr. 7, 91058 Erlangen, Germany samnees@gmail.com, schwarz@lnt.de, wk@lnt.de.
authors.forename: Walter
authors.initials: W
authors.lastname: Kellermann