A public addressing system can identify user preferences including language, volume, and method of delivery to provide improved content in a given geographical area using perceptual computing techniques. The system can also support the use of personal devices including wearables in order to deliver private personalized messages discreetly. For example, one embodiment of a public announcement system gathers and aggregates demographic data of a population in a public place. The public announcement system creates inferences from this data to predict content delivery preferences, such as a sequence of languages or delivery characteristics (e.g., speech rate, content and volume). The delivery preferences can be ranked and then a recommendation for a public announcement provided.
SYSTEMS, METHODS AND DEVICES FOR PUBLIC ANNOUNCEMENTS