Welcome to STIPA.info
This website is dedicated to collecting information, test signals, articles and other online resources about the Speech Transmission Index. For the moment, its primary use is to serve as a download location for the various test signals described in IEC-60268-16 rev. 5 (2020) annex C.
This site is maintained by members of the IEC-60268-16 maintenance team. If you would like to contribute, or if you would like us to link to your website, please send an email to This email address is being protected from spambots. You need JavaScript enabled to view it..