supervised electronic audio communication system for use in safety and evacuation comprised of wall and/or ceiling speakers, hand held microphones, power supplies, chargers, back-up batteries, digital voice module, amplifiers, pre-amplifiers and microprocessors

'amplifi':31,34 'and/or':15 'audio':3 'back':25 'back-up':24 'batteri':27 'ceil':16 'charger':23 'communic':4 'compris':12 'digit':28 'electron':2 'evacu':11 'hand':18 'held':19 'microphon':20 'microprocessor':36 'modul':30 'power':21 'pre':33 'pre-amplifi':32 'safeti':9 'speaker':17 'supervis':1 'suppli':22 'system':5 'use':7 'voic':29 'wall':14

SAFEPATH

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