My hearing is fine, but I frequently struggle to hear dialog when playing a DVD movie in 7.1. I think it is mainly an issue with recording and mixing of the soundtrack, but perhaps it is also partly an issue with the quality of my center channel speaker, as Fathertime suggests. I let my pre-pro balance all the channels with the auto-setup microphone, but the dialog is just not loud enough against the music and effects.
Some AV receivers (Yamaha?) have a "dialog lift" feature that supposedly makes the dialog stand out more.
Some AV receivers (Yamaha?) have a "dialog lift" feature that supposedly makes the dialog stand out more.