I use the NoNoise plugs and I love them. They cut out the high frequency stuff but I can still hear music, voices, sirens and what not. I’ve used with all kinds of different helmets and manufacturers, as well both Sena and Cardo units. The volume needs to be about 2/3 up on the highway. They’re comfortable and since I’ve started using them, about 4 years ago, I’ve never had to deal with ringing in my ears after a ride.