Table 2. Stimulus and Recording Parameters for the Simultaneous Click Electrocochleography (ECochG) and Auditory Brainstem Response (ABR) Recording.

Stimulus and recording parameters	Setting
Two-channel recording using custom-made TM-electrode	Channel A for ECochG and channel B for ABR  • Inverting (−): TM-electrode linked to both channels (A and B)   • Noninverting (+): contralateral mastoid (channel A + ) and high forehead (channel B + )   • Common ground: mid-forehead and the ground end of the TM-electrode lead
Stimulus characteristics	85 dB nHL, alternating 100-μs-duration clicks Three click rates: 19.5/s, 97.7/s, and 234.4/s
Bandpass filter	10–3,000 Hz
Amplification	100,000
Sweeps	2,000 for the 19.5/s and 97.7/s rates 2,500 for the 234.4/s rate
Artifact rejection	30%
Window	50 ms