It lowers/ muffles all surrounding noise. It's not a miracle worker. Just kidding. :).

@@Jean78578 alright, thanks very much!

I’m pretty sure she mentioned that she was adding the acoustic foam for the specific purpose of increasing the noise reduction. I’m not trying to come across as snippy but if you watched the whole video, you would not have needed to ask that question.

I'm guessing the more foam you can get in, the better noise reduction.

The only night time earplugs that work for me are the wax ones. A headset won't work..

I use ear protection ear muffs (like the kind Tech Angel is using) for sleeping. I use a travel pillow (shaped like a U) and I can get into a fairly comfortable side-sleeping position that way.

No. Unless you sleep exclusively on your back (not on your side)

Thanks for letting me know.

Lol

Eh, it works for me. Of course I don't sleep in them regularly...

Eh, it works for me. Of course I don't sleep in them regularly...

Yes. Very lightweight.

Often, packing materials include foam.

Any additional material added will help dampen sound.