I wonder if anyone has made a set of earplugs that specifically target attenuation so that primary speech frequencies are less affected. I know foamies roll off HF aggressively (looks like 2k is the knee point[1])

My issue with foam earplugs is that they're too good at attenuating. I end up wearing them partially inserted, which is ok as long as you're staying still. If you are at a concert, or you're eating, or you have long hair, you'll disturb them.

[1]: https://www.offshorenorge.no/globalassets/dokumenter/drift/s...