Procurement
The process
Human skeletal material is available for purchase through licensed medical supply companies. The specimens originate from anatomical donation programmes — individuals who consented, during their lifetime, to the use of their remains for medical education and research. The documentation is thorough. The chain of custody is traceable. The ethics are clear, provided you do not think about it too hard on a Tuesday evening after your second glass of wine.
The calvaria used in the Sanskulla was sourced from a Belgian supplier specialising in anatomical specimens for universities. The ordering process took four minutes. The delivery took six business days. The box was smaller than expected.
Inside: one autopsy-cut cranial vault, wrapped in tissue paper. No instruction manual. No certificate of previous ownership. No name.
The question everyone asks
"Is it real?"
Yes.
"Whose was it?"
The supplier does not provide that information. The donation programme is anonymised. The skull belonged to someone who decided, at some point, that their head would be more useful to science than to the ground. This is either profoundly generous or profoundly indifferent. Both readings are valid.
What is known: the skull is adult, the sutures suggest an age of 40–60, and the autopsy cut indicates the individual's death was subject to post-mortem examination. Beyond that, the skull keeps its own counsel.
On the acoustics of bone
Bone conducts sound differently than wood. This is not a metaphor. It is a measurement. The calvaria resonates at frequencies that cherry wood does not, and vice versa. Together they produce something neither material achieves alone.
Diaphonization notes: temperature sensitivity
The clearing process failed twice before it worked. Both failures were temperature-related. The enzyme that digests soft tissue operates in a narrow thermal window. Outside that window, you get soup.
CRT safety, or: things they should print larger
A flyback transformer stores enough voltage to stop your heart. This information is printed in 6pt type on a label inside the casing, which you can only read after you have already opened the casing. The design philosophy here is unclear.