Can you see the leading edge of the transient, decay/sustain, resonance, ringing, etc. in the frequency response? I suppose that’s what I was referring to.
Seeing as all those things would reveal themselves as peaks of variable bandwidth in the frequency response, yes.
As long as we’re talking about LTI-systems (which headphones are), then yes.
Of course using digital signal processing one could conceive of a system that shows flat frequency response but endless ringing (e.g. a reverberation effect), but this is where we leave the LTI conditions.
We measure the acoustic phase, using Room EQ Wizard, and the graphs are wrapped. What’s the difference between ours and your measurements?
I measure with APx4.6 (from Audio Precision), and the results we’re getting for acoustic phase look drastically different.
How can I add pictures to a comment? I could show you the graph of e.g. the HD800S as measured on our system (APx526 / Gras 43AG)
If there was a difference in the impulse response, we would see it show up in either the frequency response or the phase response.
You can’t change the impulse response without also affecting frequency response and/or phase.