How are the speakers in the JBL Tune 250 BT headphones?

Question

Headphones

I have JBL Tune 250 BT headphones. When one of the headphones accidentally got food, a thick sauce for pasta (didn’t fill it, it dripped a little). When I tried to clean it, I overdid it, and tore off the membrane

(there was an aiset inside the naunika, it is held on one side).
To prevent debris from getting inside the earpiece, I sealed the hole with electrical tape.

The sound became different. Not so detailed. As I understand it, the earphone can no longer be saved, it is maintenance-free. But nevertheless, what role does the membrane play? How is the earpiece inside?

Answer 1

Approximately the same role as the hole in the back of the case in conventional speakers (phase inverter).
You did a little crap, don't take it as rudeness. Go to any tobacco store, buy pipe nets (50 rubles), cut out a small circle from one and glue it from the inside of the earpiece - it will be exactly the same as with the original one.