Public-address systems consisting of electronic audio amplifiers, namely, digital data to audio amplifiers with ambient audio sensors and compatible with control interfaces for triggering audio announcements and transmissions of audio and texts to output devices, namely, speakers, paging systems, amplifiers, computers, smartphones, and tablets

'address':3 'ambient':17 'amplifi':9,15,42 'announc':28 'audio':8,14,18,27,32 'compat':21 'comput':43 'consist':5 'control':23 'data':12 'devic':37 'digit':11 'electron':7 'interfac':24 'name':10,38 'output':36 'page':40 'public':2 'public-address':1 'sensor':19 'smartphon':44 'speaker':39 'system':4,41 'tablet':46 'text':34 'transmiss':30 'trigger':26

EARBRIDGE

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