I figured this out. Go to Settings > Accessibility > Power Controls > turn Power Controls OFF.
Idk why this works, or what the h*ll Power Controls have to do with speech while opening folders, but it does. This was driving me nuts, and the Web hasn't been too helpful. So I figured it out thru trial and error. Apparently there are a lot of folks out there having this issue.
It is a Samsung issue and they have a fix. See:
FAQ | Productigeeky
I had that problem on my s2, just figured it out: go to settings>I don't even have that option under settings, its driving me nuts and quiet annoying at night.