My band practices in a 10x10 cement warehouse. We have some stuff on the wall to help with the sound but my ears are KILLING me after practice. I wear earplugs throughout practice but they don't seem to do the job. Obviously my band is loud, but we're not ridiculously loud or anything. The earplugs I currently use are http://www.earplugstore.com/er-20-blister.html?cmp=googlebase&kw=er-20-blister&ppce=ZT1Gcm9vZ2xlJm49RnJvb2dsZStGZWVk&gclid=CI6r3uTz6LICFXSSPAodvW8Atw and I'm wondering if there are some better ones or some other alternative to save my hearing. THank you!