I know quite a few speaker brands with either third-party or own measurements, as well as a demonstrated grasp of the science. Same for headphones and IEMs to a lesser extent. I'm looking for CIEMs for the isolation and relatively consistent fit. I know that data is limited by differences in insertion depth and geometry of the IEM for each ear, but there seems to be a near-total absence of data or indeed, any indication of engineering beyond intuition and fluffy subjective impressions for CIEM brands. Several of them even peddle cable voodoo. The only one I know of that seems quite objective is UE. Are there any others I should look at?