TuneSound tube plugs are solid inserts for HYPƐAR Sonic Superior earplugs that deliver maximum bass and the lowest possible background noise. Swap them in when you want full isolation for focused listening or very loud environments. TuneSound™System tube filters/plugs are needed for HYPƐAR™Sonic earplugs model Superior. You easily change yourself to which tube dampers/plugs you want for each occasion. Tube plug for maximum bass and smallest possible background noise.