I am a true believer in using ear plugs and use them each and every time I ride. Over the years I have tried almost everything from foam, to molded to electronic but find myself gravitating back to foam which I use for a few times and then discard without the inconvenience of cleaning. About 25-30 dB reduction at the low frequencies muffles most engine and some wind noises while allowing me adequate awareness of surroundings.
I ride with a modular Shoei and Sena SRL comm. inter-phased with the bike so all comm, GPS instructions, music, phone calls, etc come though the Sena.
2018 BMW K1600GTL
2017 Indian Springfield