Audio stuff is different - I "hear" ads on NPR all the time... except they're ads, so I'm not really *hearing* them because they just become something I'm generally aware is happening but that I tune out. That's just how human brains *work*, right? I have things I wanna think about so until there's a change in sound that cues me in that we're back to real content, I just tune out could almost never tell you what product and/or service any of those ads were for or what was said in them.