Just wanna ask CIEM owners, say you put on your CIEMS and leave them in without being connected to anything. Now play some sounds/music through your desktop speakers, Is there any difference in the level of isolation (the volume from the speakers) when you open or close your mouth?
I'm finding the external music softer when my mouth is opened. With my mouth closed, external music is actually a little louder, but there's still gd isolation so to speak. And when I play music through the CIEMs, bass impact isn't affected. So I'm unsure if I have a bad fit.
Is this normal to have such variations, or does everyone experience tighter seal (softer external sounds) with their mouth closed?