Figure 1.

Simultaneous measurement of DP and DPOAE and locally damaged cochlea. (A) DPAOE was measured in the ear canal pressure responses close to the eardrum with a sensitive microphone with two-tone stimuli to the ear canal in a closed-field sound configuration (sound system coupled to the ear canal opening with bone wax). Simultaneously, the intracochlear DP was measured in ST pressure responses in turn one with a micro-pressure-sensor. (B) Sensor positioned close to the basilar membrane. (C) Sensor indenting the cochlear partition. BM: basilar membrane; IHC: inner hair cells; OHC: outer hair cells; ST: scala tympani; SV: scala vestibuli; TM: tectorial membrane.