Earfun Free Pro - future tunings for different ear canal resonances

First of all thanks to everyone who joined the enthusiast level and for all the feedback so far regarding my latest tuning.

After my return from holidays I want to sit down and start preparing further tunings for the Earfun Free Pro optimised for other ear canal resonances than mine. I hear the main peak of the Earfun Free Pro at exactly 6500hz. So far I got values varying from 6000hz to 7100hz. I would kindly ask everyone to provide me his frequency again so that I can get as many values as possible to get a better idea of where the most incidence is and for which values I should try to do further optimisations. I am not sure if my optimisations will really work and if they can offer noticeably better results for those with different resonances than mine. This is just an idea and maybe one of its kind approach that has never been done before by anyone else. I will also need some feedback from you about the results how they will sound for you as I cannot promise if the adjusted tunings will sound more correct to you than the current one.

I thought about doing the following tunings:

6000, 6250, 6500 (already available), 6750, 7000.

I wonder if anyone really hears the peak at 8000hz which seems to be the value that every reviewer is using for their IEM measurements. Also most IEMs seem to be tuned for that ear canal resonance, which is totally flawed when looking at the provided values so far. The worst thing is, that even existing couplers seem to be flawed as they hardly offer a way to measure IEMs with peaks lower than 7000, I need to apply a mod to be able to measure the Earfun Free Pro with my own resonance let alone frequencies even lower than mine. I really wonder where the calculated average will be.

How to check your own ear canal resonance?

Switch to an empty EQ slot through the Airoha app and the EQ will reset to default values. Play pink noise and you should hear a distinct peak between 6000-7000hz which sounds like some kind of whistling. Take one of the filters and set it to -10dB and Q5 and adjust the frequency until you will hear the peak disappear. Start at 6500 maybe and go down or up with the frequency until you get a much smoother response and cannot hear the peak at all.

Then please leave a comment here just telling me your value to keep the comment section clean as this will help me with my further work to have all values collected here.

Thanks to all, as with your help we will hopefully manage to offer the best sound quality on the market optimised for everyones ear.