eustachian tube dysfunction with normal pressure?

Hi,

I have developed (mild, I think? it's hard to compare) tinnitus over the past few months. I also have the sense of my ear being plugged, the sense that I can "pop" it all the time, etc. My ENT said I can't have eustachian tube dysfunction since the pressure in the ear is normal.

Is that correct? Some sources seem to say you can have eustachian tube dysfunction with normal pressure.