1977 Volume 20 Issue 6 Pages 709-712
Vibration mode of the human footplate was studied by means of holographic interferometry. Ten temporal bone specimens were treated as to be observed at the footplate from the inner ear side. The eardrum of each specimen was vibrated with a speaker generated by several test sounds of frequencies within the audible range, and vibration of the footplate was observed and recorded by holographic interferometry.
One of the noteworthy findings was that the axis of movement of the footplate seemed to exist at some distance outside of the footplate.
