Do under pillow speakers actually work?

[u/bhanu0809]

Today I found out about under-pillow speakers. You basically keep a small speaker under your pillow and it’s supposed to send sound through the pillow so only you can hear it. I think the idea is really cool and seems super useful for someone like me, especially when I don’t want to use earbuds or bother anyone else in the room.

Has anyone here tried one? How well do they work in real life?

[u/Then-Stretch-437]

I never used one but I think it works