Controlled round-window stimulation in human temporal bones yielding reproducible and functionally relevant stapedial responses
The results suggest that 90-μm pretension of the RW membrane is essential for optimum and reproducible RW stimulation. The displacements are shown to be roughly consistent with the equal-volume displacement hypothesis under specific assumptions about the displacement mode of the RW membrane. It is further suggested that the large inter-patient variability in the effectiveness of RW stimulation might be due primarily to the success of coupling, rather than to variability of functionally relevant anatomical parameters.
from Hearing Research