Anecdotal and no data to back it up, but I have a pair of Shure IEMs and I love it. I listen at a fairly comfortable level all the time, and usually when I tak

Anecdotal and no data to back it up, but I have a pair of Shure IEMs and I love it. I listen at a fairly comfortable level all the time, and usually when I take them out I'm surprised by how loud the world is around me. Seems like that should mean I'm listening at an objectively quieter level than ambient noise.