Gazzah, HoucemDelmas, Jean PierreJesus, S. M.2017-04-072017-04-072016-080018-9251AUT: SJE00662;http://hdl.handle.net/10400.1/9357The problem of directional sensor placement and orientation is considered when statistical information about the source direction of arrival is available. We focus on two-sensor arrays and form a cost function based on the Cramer-Rao bound that depends on the probability distribution of the coplanar source direction. Proper positioning and orientation of the sensors enable the two-sensor array to have an accuracy comparable to that of a three-or four-sensor uniform circular array.engjournal article10.1109/TAES.2016.150655