Plug-In DIN 60268-16 STI RASTI STIPA

Measurement of speech intelligibilty according to DIN/IEC 60268-16 Supports STI STIPA RASTI. Measurement can be done via impulse response or modulated noise. Speech-intelligibility is the key feature to human communication. For evacuation systems, telecommunication, announcement systems (e.g. train stations) or rooms for education, poor speech-intelligibility will degrade their function or even become a security issue. In many countries there exist limits for the speech-intelligibility. For new public buildings a certification measurement is required and the speech-intelligibility results must be documented. In most cases this must be performed according to IEC 60849 or ISO 7240-16. The first orginal measurements were based on statistical analysis of listening tests. In contrast, the STI-method specified in DIN/IEC 60268-16 is an objective method. It uses special test signals (modulated noise) that simulate human voice and computes the influence of a transmission channel which degrades the speech-intelligibility. The speech intelligibility of a transmission channel depends on: the speech level frequency response of the channel non-linear distortions background noise level quality of the sound reproduction equipment echos (reflections with delay > 100ms) the reverberation time psychoacoustic effects (masking effects) The STI method uses 7 octave bands in the range of 125Hz to 8000Hz. It computes a single value, that reflects the speech-intelligibility.This value can be in the range of  0 to 1.0. A value of 0 is equivalent to a very poor speech-intelligibility. 1.0 is an ideal channel with excellent speech transmission. Features Conforms to IEC 60268-16:2003 and 2011 STI, STIPA, RASTI Very easy usage. Make your first STIPA measurement within 2 min. Measurement via modulated noise and room impulse response. (direct and indirect method) Background noise can be included via spectral values or .wav file. No spreadsheet calculation required. Auditory masking conforms to IEC 60268-16 ED 3.0 (2003) and ED 4.0 (2011) Displays modulation indices for each band Octave analyzer Speech level measurement according to IEC 60268-16:2011 Annex J.2 Easy export of data You can find the quick guide here