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Speech Intelligibility STI-PA
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Public address systems in buildings like airports, railway stations, shopping centers or concert halls have to clearly inform persons in danger about escape information and directions in case of an emergency,. The NTi Audio STI-PA analyzers measure the speech intelligibility of emergency systems in accordance with the standard 2003 IEC 60268-16.
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XL2 STI-PA Analyzer
The STI-PA function measures the speech intelligibility of public announcement systems according the latest revision of IEC 60268-16:2003 standard. The XL2 displays the measurement results as STI or as CIS results, accompanied by the individual levels and modulation indices of the seven octave bands. The measurement results are acquired from the dedicated STI-PA test signal, generated by the
- included STI-PA Test CD
- Minirator MR-PRO, test signal generator, required for audio systems with line inputs
- NTi Audio TalkBox, acoustic signal generator, required for audio systems with voice microphones, thus measuring the complete signal chain
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STI-PA Analyzer Class 1
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The XL2 Audio and Acoustic Analyzer forms together with the M2210 Measurement Microphone a leading STI-PA Analyzer with class 1 frequency response according IEC 61672-1.
Order Information:
- XL2 + M2210, NTi Audio # 600 000 350
- XL2 STI-PA Option, NTi Audio # 600 000 338
- 2x Calibration Certificate, NTi Audio # 600 000 018
- STI-PA Signal Source Minirator MR-PRO or TalkBox (for details see below)
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The Exel Acoustic Set with STI-PA Option and TalkBox contains all instruments and accessories for precise speech intelligibility measurements.
Order Information:
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STI-PA Analyzer Class 2
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The XL2 Audio and Acoustic Analyzer forms together with the M4260 Measurement Microphone a professional STI-PA Analyzer according IEC 61672-1, class 2.
Order Information:
- XL2 + M4260, NTi Audio # 600 000 340
- XL2 STI-PA Option, NTi Audio # 600 000 338
- 2x Calibration Certificate, NTi Audio # 600 000 018
- STI-PA Signal Source Minirator MR-PRO or TalkBox (for details see below)
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STI-PA Analyzer Basic
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The Acoustilyzer in combination with the MiniSPL measurement microphone forms a comprehensive STI-PA analyzer according IEC 60268-16.
Order information:
- Acoustilyzer AL1, NTi Audio # 600 000 080
- MiniSPL, NTi Audio # 600 000 022
- AL1 STI-PA Option, NTi Audio # 800 000 013
- 2x Calibration Certificate, NTi Audio # 600 000 018
- STI-PA Signal Source Minirator MR-PRO or TalkBox (for details see below)
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The Acoustic & STI-PA Set Pro with NTi Audio TalkBox contains the instruments and accessories for end-to-end STI-PA measurements, as a complete kit packed in the protective Minstruments Case.
Order information:
- Acoustic & STI-PA Set Pro, NTi Audio # 600 000 066
- NTi Audio TalkBox, NTi Audio # 600 000 085
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Alarm messages by hard-disc: Minirator MR-PRO is STI-PA signal source
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The MR-PRO is an extremely powerful analog audio generator to satisfy every need for the professional engineer. Besides other common test signal the MR-PRO generates the STI-PA test signal.
Read more...
NTi Audio #: 600 000 310
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Alarm messages by human operator: NTi Audio TalkBox is STI-PA signal source
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The NTi Audio TalkBox greatly simplifies the acoustical feed of the STI-PA intelligibility test source signal into closed sound reinforcement systems. It presents the standardized voice-like acoustical signal emission simulating a human talker according to IEC 60268-16, combined with a TNO certified speech intelligibility signal at standardized levels.
Read more...
NTi Audio #: 600 000 085
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STI-PA Post Processing
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Measuring speech intelligibility with realistic environmental noise is often not applicable, e.g. in railway stations these measurements might not be carried out during peak hours at highest background noise level. In practice the STI-PA measurement will be much rather taken during the night as less persons getting disturbed by the played test signal and post calculated there after. The post processing software a free download here.
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