ETY Plugs High Fidelity Earplugs use a proprietary tuned resonator and acoustic resistor to replicate the natural response of the ear canal. Sound is reproduced unchanged, as the ear would hear it, only quieter. They reduce most noise to safe levels while preserving the lucidity of sounds. Traditional foam earplugs do not compare with high fidelity EtyPlugs. The well known bright colored foam plugs muffle sound by reduce mid-range and high frequencies resulting in muffled speech and music.