Figure 3.

(a) Biphasic pressure change related to opening of the round window membrane with a needle. (b) Biphasic pressure change related to opening of the round window membrane with a cannula. (c) Unidirectional pressure change through opening of the round window membrane with a diode laser (4 W). (d) Unidirectional pressure change through opening of the round window membrane with a diode laser (6 W). (e) Unidirectional pressure change through opening of the round window membrane with a diode laser (10 W). (f) Unidirectional pressure change through opening of the round window membrane with a CO₂ laser (20 W).