Cool Product

Hearing loss is one of my greatest fears. My oldest daughter failed the hearing test they give newborns, and I almost had a heart attack (the test is notoriously inaccurate, apparently, which my response then is "so why give it!? Her hearing is fine, btw). I am seriously considering a pair of these. I've seen the analog version, where there is a molded piece of plastic that you insert in your ear, and there is a tiny hole drilled in the center. They always seemed like they would negatively impact the sound in some way, especially in the high and mid range. The Etymotic Music Pro earplugs are essentially hearing aids that are programmed to reduce sound levels, while mainting a natural balance of mid, high and low frequencies. I'm curious to see (hear) how they perform in a choral setting. Does anyone have any experience using these type of earplugs?