What is the weight of one of these ear buds? I guess too much weight can easily give you head aches. On the other hand, it seems from the pics that further miniaturization is possible.
I know that NASA was doing some research on using the tympanic membrane to measure intercranial pressure. Ask around, please, and find out if anyone has considered that application. We really do need a better way to detect cerebrospinal leak (CSF Leaks). A CSF Leak was a significant contribution to my late wife's death.