[On the oscillation form of the stapes as a function of the volume. Experimental investigations into the human temproal bone preparation (author's transl)].

In order to further clarify the change in the oscillation form of the stapes as a function of the volume, measurements were performed in 10 fresh temporal bone preparations at two points at the short and long diameters of the base of the stapes from the labyrinthine side. The oscillations were recorded from two channels, first, by two electro-dynqual stress on the base of the stapes, also optically by modulating a light beam and electronically scanning by means of a phototransistor, and the oscillations were then recorded on a two-beam oscilloscope. The result was that it is not possible to prove any phase shift between the two measurement points at the short or at the long base of the stapes in a volume range within the physiological limits. Thus, any sweep phenomenon at high volumes does not exist. Also, a volume-dependent shift of the oscillation axis on a line within the base was not to be observed.