That's probably fairly accurate, depending on whether the expiration valves have any baffles in them (which they probably don't). You can stack masks to get extra protection effects if you can tolerate it. You could wear a surgical mask under your respirator to help to protect others better, for example.
I have tried to seal the exhalation valve of the half face respirator but it becomes more difficult to exhale. I can do it partially with the breath deflected to my neck. Would this perform similar to the surgical masks? I mentioned surgical masks because n95 are now so expensive and scarce, the public no longer use them. So i need to compare the half face and full face respirators to surgical masks only, not n95.
How do you compare a surgical mask only to the half or full face respirator as far as exhalation is concerned? Which has highest score or lower score. This is the hole in the half face respirator (which is similar to the full face respirator) with a small thin rubber flap shown in my original message)