Abstract: The diffuser (1) includes a receptacle which contains the odorous substance to be diffused in liquid form or the like, and which is closed by a diffusion membrane (3c), and means for rotating the receptacle about itself. The receptacle includes a plurality of compartments which enable the weight of the odorous substance to be distributed over the periphery of the axis of rotation (DD) of the receptacle. In a preferred embodiment, the receptacle includes at least one annular-type housing (3) which is centered on the axis of rotation of the receptacle, and which is partitioned into a plurality of identical compartments (5a, 5b, 5c, 5d, 5e, 5f).

Abstract: The dynamic diffuser for a naturally diffusing liquid substance such as a perfume comprises a receptacle for said substance and having a vertical flank which is closed by a membrane that is impermeable to liquid but permeable to gas. All or part of the membrane is caused to come into contact with said substance, at least intermittently, by revolving the receptacle about a horizontal axis. Air-flow generating means, e.g. impeller blades, serve to cause air to flow over the outside of the membrane.