The XL2 Analyzer, with the STIPA Option installed, measures the speech intelligibility according to the latest revision of standard IEC 60268-16:2011 (edition 4) and older editions. It offers ambient noise correction and automated averaging for repeated measurements. The XL2 displays the speech transmission index (STI) and the common intelligibility scale (CIS), accompanied by the individual levels and modulation indices of the seven octave bands.
- Measurement in accordance with IEC 60268-16 (edition 2, 3 and 4)
- Ambient Noise Correction
- Automated Averaging
- Display of Modulation Indices
Announcements by Persons
The NTi Audio TalkBox is required for audio systems with voice microphones. The TalkBox feeds the special speech intelligibility test signal into the operator microphone of sound reinforcement systems. It presents the standardized voice-like acoustic signal emission simulating a human talker according to IEC 60268-16, at standardized levels. This setup considers the entire signal path for an accurate STIPA measurement. It includes all effects of the operator's microphone and environment.
The TalkBox provides two major advantages for STIPA measurements:
- An extended test coverage and an easy to handle test signal injection.
- Sampling frequency deviations are completely eliminated - a dangerous trap when using portable CD players.
Prerecorded Announcements from Mass Storage Media
The Minirator MR-PRO is used as a test signal generator for electrical signal injection into public address systems that commonly use alarm messages from a hard drive (systems without a microphone).
STI Reporting Tool
The STI Reporting Tool creates measurement reports according to the standards
- AS 1670.4
- CEN/TS 54-32:2015
- DIN EN 50849:2017
- IEC 60268-16
- ISO 7240-19:2007
- VDE V 0833-4-32:2016
- VDE 0828-1:2017-11
The tool calculates the effect of the actual ambient noise caused by the public onto the measured speech intelligibility. Thus it provides you the expected speech intelligibility in STI or CIS during real-life emergency announcements.
- PC running Windows XP, 7, 8 and 10
- Excel 2010, 2013 or 2016 (32 bit or 64 bit)
More about Speech Intelligibility