It hasn’t been added in the bleeding-edge Sphinx svn repo under cont_ad.h/cont_ad_base.c – if it is part of a brand new area of source in svn let me know the names of the source files and I’ll take a look. Good noise robustness is important for everyone’s project, but performance in very noisy environments is always going to be less accurate and with mistakes in speech/silence estimation. To set expectations, if there is new VAD implementation and it is mature enough to go into production code, it might be possible to look at and maybe add starting in April or May – this isn’t an area of the project where changes can be made quickly or with any kind of pressure because it heavily affects every app that uses the project.