This gets particularly critical the higher you move up in frequency where all sorts of narrow band intefereneces appear (depending on the individual anatomy in correlation with the characteristics of the headphone). To me that makes perfect sense since some headphones come with a very wobbly response which can introduce sensible errors unless you significantly increase the number of bands. He recommends the use of narrow band noise instead of pure sine tones. I had good success with David Griesinger's loudness equalization procedure in the past, tuning my headphones to my average listening level (skipping the HRTF part). Wouldn't it be better to choose the average of 80 Phon instead? May I ask what the corrected curve does apply? Is it a rough compensation for higher listening levels, resulting in less treble and bass emphasis compared to the 'boosted' hearing threshold curve? Comparing the graphs it looks like you added the 100 Phon curve. I hope that will change with your implementation in Peace. Loudness equalizations get way to little love in the community.

Loudness equalization good or bad