A device (200) for generating an aerosol cloud, the device (200) comprising: a body (210) defining an inner cavity, an outer surface, and an opening (213) extending between the inner cavity of the body (210) and the outer surface; at least one ultrasonic element (220) operable to aerosolize a liquid disposed in the inner cavity; and at least one sensor (226) associated with the at least one ultrasonic element (220).