Might want to revisit the skydiving restriction. There is significant air pressure differences from 3,000 to 10,000 to 15,000 feet as anybody can tell when driving in and out of mountainous terrains. I've drove often in my line of work from 4,000 to 11,000 feet and there is significant changes in air pressure and is more pronounced if you have a cold, too. Skydiving you rapidly fall through and will experience rapid air pressure changes as opposed to slow changes, sometimes not even noticed, from driving 4,000 feet to say, 4,000 feet to 9,000 feet.
UCSF - Cochlear Implant
I'd say seek this question from a *qualified* person on CI since this is an expensive equipment you're dealing with.