Any target curve is only valid for one volume level, thanks to our hearing acuity at different frequencies. I also feel (no concrete evidence)
that the flat curve is the desired target, which is then modified based on Fletcher-Munson curves and the target listening volume. (Who are we to tell recording engineers that they screwed it up by changing the frequency response of their creations?)
Since I often listen at wide range of volumes, dynamic equalization (Audyssey, Dolby,...) is my solution, with the flat target curve.
And since everybody's hearing is a little different, finding the "perfect" target curve for any one person is non trivial. Room treatments, and how directional the speakers are (monopole, dipole, etc...) can also influence what the preferred target curve should be.
that the flat curve is the desired target, which is then modified based on Fletcher-Munson curves and the target listening volume. (Who are we to tell recording engineers that they screwed it up by changing the frequency response of their creations?)
Since I often listen at wide range of volumes, dynamic equalization (Audyssey, Dolby,...) is my solution, with the flat target curve.
And since everybody's hearing is a little different, finding the "perfect" target curve for any one person is non trivial. Room treatments, and how directional the speakers are (monopole, dipole, etc...) can also influence what the preferred target curve should be.