Your thoughts on resonance peak (audibility) inside an ear canal?

What are your thoughts on ear canal resonance peaks in case of IEMs?
I mean, almost every single graph tool has this “warning” about an 8k Hz peak that it is just coupler’s resonance, but aren’t our ear canals built as if they were a tube with with a microphone at its end? This makes me wonder if resonace peaks happen in case of IEMs. I personally do not hear them, meanwhile some people claim that this phenomeon strongly influence how IEMs sound to them. Is it because some people have more “resonance-peak-prone” ears? Or do my ears have strong treble frequencies averaging? Or perhaps (in my case) it is kind of a situation where a resonance peak is ignored by ears like a nose is ignored by eyes?

it just doesnt bother you. the iem resonates at that frequency, not your ear. its audible. all objects have a resonant frequency. in the case of speakers, it adds gain to the frequency it happens at.

I guess it would vary from ear to ear due to their dimensions. The peak can shift with insertion depth right?

Yes (HRTF).

Yes (and also angle).

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