TuneSound™PRO System music filters/plugs are needed for HYPƐAR™Sonic earplugs model Superior PRO. You easily change yourself to which music filters you want for each occasion. Music filters provide even damping for all frequencies, which gives a completely natural sound but with lower sound level. There are 4 music filters with different damping to choose from: Filter choice: DM Ocean, DM Blue, DM White and DM Black