“Acoustic methods have been used for detecting blockages in pipes and even the ears of newborn babies for many years. The study, published in Journal of Aircraft, set out to discover if similar methods could be used for real aircraft Pitot tubes”
Tears and sweat. Free contributors, heroically, completed 7 localizations! And are working on 19 languages! Check out the online translation project on Crowdin https://bit.ly/31FBA5F.