Eiron wrote:

I was thinking about doing some dummy head recording and the effect on
frequency response
of using an electret capsule in a model of an ear, compared to just
placing it on the surface of a head-sized sphere.

Any thoughts before I start moulding body parts in plaster?

If you model the ear's shape then you'll double the effect when listening
to the recording. Not required therefore I'd say.

Graham