The present invention relates to a volatile substance diffusing device (10), comprising (a) a fluid inlet (11) (b) being in fluid communication with a nebulizer chamber (14) (c) into which a nebulizing tube (13) is extended, (d) which is in fluid communication with a volatile substance supply tank (12) (e) said nebulizer chamber (14) opening into an upper neck (15) (f) to which a silencing device (16) is fitted (g) said silencing device (16) being in fluid communication with a hose (17) and said hose (17), at its end opposite to the silencing device (16), opens into a scent-release device (18) from which the volatile substance is released to be experienced as a mixture (19) of fluid and volatile substance by a user (20) approaching the scent-release device (18). The invention also relates to a method of diffusing a volatile substance into a fluid, said diffusion method being characterized in that (a) a volatile substance in liquid form is supplied from a container (12) to a volatile substance exit (13 a) of a nebulizing tube (13) extending into a nebulizer chamber (14), while simultaneously (b) a fluid is fed into said nebulizer chamber via a fluid inlet (11) being in fluid communication with said nebulizer chamber (14) (c) said fluid conveying said volatile substance through said nebulizer chamber (14) while mixing said volatile substance with said fluid and (d) further conveying the volatile substance/fluid mixture through the nebulizer chamber upper neck (15) into a silencing chamber (16) for expanding and diffusing said volatile substance within said mixture and (e) further conveying said volatile substance/fluid mixture through a hose (17) being in fluid communication with said silencing chamber (16) to a scent-release device (18), where the volatile substance diffused into the fluid is released to be experienced by a user (20) approaching the scent-release device (18). The invention also relates to the use of said device (10) for testing and other purposes.