What are the different levels of noise protection for custom-made ear plugs? Follow We offer -9db, -15db and -25db sound isolation levels. Related articles I have a technical (sound) issue with my earphones and they need repair, what do I do? User Guide Fitkit vs. Audiologist Impressions How long is the typical turnaround time from order to shipment for UE Pro Custom In-Ear Monitors? I'm a keyboard player. Which UE In-Ear Monitor is best for me?