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Posts Tagged ‘ intelligibility ’
Mike Knoras is a Project Manager for the Atlanta regional office of Aon Fire Protection Engineering Corporation (Aon FPE). Aon FPE consults on matters of life safety, code and fire protection, which includes emergency voice systems, mass notification systems and other systems that require audibility and intelligibility. As a licensed professional engineer with master’s degrees in electrical engineering and fire protection engineering, his vast experience spans fire alarm and life safety systems and emergency voice systems placed in high-rise buildings, public assembly areas, and large mixed-use occupancies.
As a relatively new concept to fire and life safety systems, intelligibility requirements will change how these systems are designed and installed. Designing for intelligibility can be complicated by a variety of factors. While the properties of the speaker have some impact on the intelligibility of a system, most factors have to do with the occupancy itself. So while important, speaker choice will not always ensure intelligibility.
Measuring intelligibility for fire and emergency communications systems (ECSs) will become more commonplace as local jurisdictions adopt the 2010 version of NFPA 72. Taking proper measures can be complex, and most fire and life safety system designers have to work around existing building features that affect intelligibility.