Abstract: A system for dispensing fluid in response to a sensed property such as an ambient sound comprises a sensor for detecting one or more properties, a processing stage for determining if the one or more sensed properties is/are within a predetermined range and/or above and/or below a predetermined level and dispenser for dispensing a fluid into an area surrounding the system if the one or more sensed properties is/are determined by the processing stage to be within a predetermined range and/or above and/or below a predetermined level and/or value.

Abstract: A method and device for creating and maintaining a personalised bubble of scent, the method including: providing a wearable device including a perfume reservoir, a perfume dispenser coupled to the perfume reservoir, and a controller to dispense a volume of perfume from the device at intervals; controlling said wearable device to dispense a pulse volume of scent from said perfume reservoir at a pulse interval; and determining said pulse volume and said pulse interval to maintain a mass per unit volume concentration of said perfume above a threshold level within a defined radius from said wearable device.