Weeks 9-10 ยท bridge & range
Siren through your bridge without a break.
Why this matters: per Estill and late CVT, the passaggio is the bridge between chest and head register, and learning to siren through it without a hard flip is what extends usable range. A smooth siren teaches the larynx to keep tilting and the resonance to migrate continuously instead of breaking.
5 trials. Each: glide on /u/ from low to high to low across your range (about 6 seconds). The detector watches for amplitude / clarity dips that signal a break. Pass = a clean siren with 0 detected breaks. 4 of 5 sessions passes.