Abstract: Disclosed is an aerosol dispensing for dispensing a metered amount of an aerosol for dispersion in an area of use unit having a main body. The aerosol dispensing unit according to the present invention includes a reservoir within the main body for holding an aerosol, an outlet in fluid communication with the reservoir and arranged to dispense a metered amount of the aerosol upon activation of a trigger device, and an audio output system adapted to play a sound in response to the activation of said trigger device. The aerosol is preferably one of a deodorizing agent and a disinfectant. The trigger device is adapted to be activated either by a sensor used to detect a person within a given area, and activate the trigger device upon detection of the person, or alternatively, a timer is operatively connected to the trigger device to dispense the metered amount of aerosol and play the sound at timed intervals.