Two sounds close enough to trade places: the “ng” of sing and the “n” of nose. Swap one for the other and a different word comes out — this page is how to keep them apart, in both directions.
Keep your tongue tip down behind your bottom teeth and raise the back of your tongue to the soft palate instead.
“The tip of the tongue is an impostor here! Keep it DOWN, and lift the BACK of the tongue, way back — nnng, from the back!”Nunzio, when he hears it
Bring your tongue tip up to touch the ridge behind your top teeth instead of raising the back of the tongue.
“You sing from the back room! Come to the front, bello — tongue tip up, touching behind the top teeth. Nnn!”Nunzio, when he hears it
You cannot hear your own swap. That is the whole problem.
Nunzio records you reading a sentence, scores every sound in it on your phone — nothing is uploaded — and tells you which of these two actually came out. Nunzio — Accent Coach is coming to the App Store and Google Play.