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Designing Emergency Voice/Alarm Communications Systems for Speech Intelligibility requires
awareness of the area dimensions, anticipated background noise level; wall, ceiling, and floor
materials; anticipated occupancy, and any other characteristics that may influence the desired
acoustical properties. This guide has presented a summary of those considerations in order to
better understand the concept of speech intelligibility.
If an area is quite large, or is expected to have significant reverberation characteristics, or has
other complicating influences such as high ambient noise, speaker selection and placement will
require sophisticated modeling tools to determine the equipment needed for proper speech
intelligibility. However, if the areas of concern are easily defined, are relatively small, and are
expected to provide minimal reverberation, the methods described in this guide provide a good
reference toward understanding proper speaker selection and placement.
Contact your local SimplexGrinnell representative for additional information concerning the
STI-CIS Analyzer and for information about the Simplex line of Emergency Voice/Alarm
Communications Systems.
Conclusion
In Closing