Good for protection
Technology of this kind has not changed much. I bought a similar pair of ear plugs to this (same design), about 25 years ago. The sound is still slightly muffled, but much better than foam ear plugs. I guess I was expecting that these would be better than the 25 year old ones, but they sound pretty much the same. There is really no substitute to listening with the naked ear if you want to hear sound in its pure form, but these are great for hearing protection. I have used them at concerts, and the sound quality is good enough, considering the alternative of after concert ringing in the ears and permanent hearing damage.
Rating: 4 stars