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Actually, you shouldn't have to correct for the Fletcher-Munsen curve.....

or, in fact, for any hearing problems, because that is a constant that you are living with. If you can't hear above 10 kHz in real life, why should you crank up the stereo so you can hear the 15 kHz on your system that you couldn't hear from a live performance?

So if you have a perfect room and perfect speakers and you are playing it back at the same level as the live performance (very important) then all should be well. If you think about it, the Fletcher-Munsen curve varies with level, but the performers compensate for it because they have the same hearing as everybody else (more or less) so at low sound levels they play bass instruments relatively louder (compared to flat) to compensate for the decreased sensitivity of the hearing mechanism at that level. Also, since the curves vary with sound level, if you adjust them for a different sound level than the original recorded level, it will be incorrect for louder or softer sounds compared to the compensation you do at the particular level you have chosen.

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