Here’s an interesting podcast on NPR about the loudness compression used in most recording these days. This is bad for everyone, but particularly those using hearing aids or cochlear implants. Although hearing pitch and timbre is difficult for people with hearing impairments, loudness is generally well-perceived. That is, until recording engineers deliberately get rid of all the loudness cues in music!
Host Robert Siegel spoke to Bob Ludwig, a record mastering engineer, and A/Prof Andrew Oxenham, from the auditory perception and cognition lab at the University of Minnesota.