Definitions:

CI(1) = First cochlear implant received

HA = Hearing Aid in contralateral ear

CI(1)+HA = Testing the patient while wearing both the first cochlear implant and a hearing aid in the opposite ear prior to receiving the second cochlear implant

1. Localization

Test set-up:

• 2 loudspeakers, each located +/- 45º from the front of the patient
• Speech noise presented randomly at 54, 59 and 64 dB HL
• Present 50 speech noise bursts; 25 to each side; random order

Test Conditions:

• CI(1)
• CI(1)+HA

2. Speech Perception in Noise; Noise facing CI(1)

Test set-up:

• Speech presented from loudspeaker placed directly in front (0º) of the patient at 70 dB C
• Speech noise presented from a loudspeaker at 90º from the front directly facing CI(1).  Noise presented at 60 dB C (i.e. + 10 dB signal-to-noise ratio).
• If the patient scores above 80% correct (ceiling effect) or below 20% correct (floor effect) at +10 dB signal-to-noise ratio, then an alternative signal-to-noise ratio should be used.  Record the signal-to-noise ratio.
• At least 20 sentences per test condition

Test Conditions:

• CI(1)
• CI(1)+HA

If there is time for additional testing, click here.

Test Forms to Download:

Localization Randomization 1

Localization Randomization 2

Localization Randomization 3

Speech Perception

Pre-Implant Thresholds

Patient Background Data Form