1. A method comprising: obtaining, by a server, non-verbal components of a plurality of speech signals which underwent de-identifying prior to being received by the server, so as to preserve privacy of the speaker at the server, and geographical locations respectively associated with the speech signals; deducing, by the server, physiological or psychological conditions corresponding to the non-verbal components, using predefined relations between characteristics of the non-verbal components and physiological or psychological conditions of human speakers; and providing a geographical distribution of the deduced physiological or psychological conditions by associating the deduced physiological or psychological conditions with the respective geographical locations of the obtained speech signals from which the conditions were deduced.