I am curious how the audiogram determine the 3 gain (and output power) curves. I understand that there are several formulas for this, but the audiogram only measures your hearing threshold. Even if 2 persons have the same audiogram, their hearing may differ above the hearing threshold. Are such differences ignored? Is the same formula used for differing audiograms?
The reason I ask is that the Equal Loudness Curves (ELC) are based on a formula. One input to this formula is the hearing threshold of a person with ”normal” hearing. The output is 10 power curves that are separated by the same amount at the frequency 1000 Hz. So I was wondering what happens if I put in my audiogram in this formula instead of the ”normal”. I decided to implement the formula in Mathematica and found that It distorted the ELCs significantly at lower powers, but not so much at higher powers.Then I sampled the formula to get the 50, 65 and 80 db curves and plugged them into the output power curves (not the gain curves) of the Music program in SmartFit just to see what happened. I tried it on my classical guitar. To my surprise it sounded very natural. Has anyone tried this?