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AFMG Network Forum Index -> EASE 4 -> Speech spectrum for STI predictions    View previous topic :: View next topic  Speech spectrum for STI predictions Posted: Fri Sep 23, 2022 8:49 am ChrisH Member   Joined: 05 Apr 2006 Posts: 19 Location: England, UK Interesting to note on the AFMG newsletter that the IEC 60268-16 speech spectrum is being incorporated into the GLL viewer. I always apply the speech spectrum to any loudspeaker input signal when making STI predictions for PA/VA systems. However, many consultants and audio engineers do not, insisting that the STI, or STIPA calculation takes care of the speech spectrum. To me this means that not only is their total SPL prediction wrong, but also the octave band SNR and hence the STI/STIPA are wrong too. Can AFMG confirm for the record that applying the speech spectrum at the input stage is essential for STI predictions? Posted: Mon Nov 14, 2022 1:14 pm daniel Member   Joined: 20 May 2005 Posts: 7 Location: Switzerland "I always apply the speech spectrum to any loudspeaker input signal when making STI predictions..." That's what I do. And also consider the crest factor: sine = 3dB, speech approx. 12dB! Otherwise the total SPL calculation is not correct. AFMG Network Forum Index -> EASE 4 You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT   Page 1 of 1   All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Select a forum General----------------Board RulesForum Announcements Software Forums----------------EASE 5-FEEASE 4EASE EvacAFMG EASERAAFMG SysTuneAFMG SoundFlowAFMG ReflexEASE FocusEASE AddressSDK for GLL PLug-in API   Powered by phpBB © 2001-2003 phpBB Group Theme created by Vjacheslav Trushkin Variation by CodeWeavers and AFMG