Crested geckos can make small squeaks and similar noises but they are not loud. I have kept crested geckos for several years singly and in trios, never heard any noise from them at all and I do sleep in the same room they were kept in.

I never heard any noise from them even when awake, except from nervous hatchlings while I was taking them out of their cages so I can clean them.

Tokay geckos make alot more noise...and sounds like a short 'bark' almost.

Unless you are an extremely light sleeper, you have nothing to worry about being kept awake at night by crested geckos.
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PHLdyPayne