I have a 600cc suzuki bandit currently sitting in my back garden at home waiting for me to pass my superbike license which I am saving for... (really excited but that's offtopic!!!). I have been doing driving lessons since September and had worry of jumping too as sometimes I'm really jumpy. I have found that the only time I jumped was my first few lessons with my driving instructor who was a man (trigger). But I did have concerns about jumping generally when I'm generally scared so I get you.

Personally I think that as I concentrate so much on driving, and my concentration is on that it is calming, and I find I actually am more focused. I assume it will be the same with a bike. Also, bike's are noisy, not much is going to be noiser other than an actual crash, which would hopefully not happen but not be a consequence of sudden noise. Uhhm, my thinking on this is to give it a go, break in gently... drive in quiet places. Then move to busier, and learn to cope with hazards and unexpected cars/obtacles etc. You may find your arousal betters your reflexes rather than causing an accident. Or you may find that that the arousal is too high and your reflexes are far too sharp and may cause an accident- hence my advice to start in quieter places until you desensitise to it.

I don't know if that is useful or the right advice but it's my thinking on this issue!