Practical Measurement of Intelligibility
Introduction
AC Adapter
Measurement of intelligibility can be complicated, and it sometimes includes subjective analysis. To effectively implement intelligible systems in real buildings requires that a simple, accurate, and repeatable method of measuring intelligibility must be available. Fortunately, there are instruments on the market that meet this need. One of these is the
The meter uses the STIpa method to provide a fast and easy measurement of total system speech intelligibility. It measures both intelligibility and audibility, as it also has a built in dB meter. The meter automatically converts the STIpa measurement to CIS so that demonstrating that a system meets the requirements of NFPA 72 is easy and intuitive.
A proprietary test tone is played through the system which the analyzer uses to determine reduction in speech modulation.
| Talkbox |
Microphone
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| Speaker |
CD Player |
| Microphone |
| Holder |
STIpa
Test Tone CD
AC Adapter | Volume | |
Control | ||
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