Hi there,

My understanding is you want to avoid what you’re describing, you want to free the air such that the only thing holding it from escaping is the tongue sealing the opening by touching the back of your teeth/roof of your mouth.

It sounds to me that you have identified that there is tension elsewhere in your body that is holding in the air.

That additional tension will reduce the resonance, make things less efficient, etc.

The throat should just stay open and relaxed.