Seriously, if you are around amplified sound, play a musical instrument (yes classical players too), go to night clubs or gigs, or work with sound in any way, invest in some proper musicians' earplugs. You don't have to wear the horrible foam ones- the proper ones can be bought from Amazon (with Tom's affiliate link) or elsewhere for about £15 and are comfortable enough and leave the sound clear and undistorted, but not loud enough to damage your hearing. Your 30 year old self will thank you later! :)