Constant noise-making, such as whistling, humming, singing, chattering, or muttering, is not uncommon in patients suffering from Alzheimer's disease and other types of dementia. As the disease progresses, it is likely your husband will eventually stop this behavior, possibly to be replaced by another such symptom. In the meantime, try to stay tolerant and remember that he would not constantly whistle if he could control his behavior better. Although it may seem maddening to you now, there will come a time when you will appreciate your husband’s ability to communicate—even if it is only by whistling.

Chewing gum could help as it might keep his mouth distracted. Just make sure that he does not have any teeth or jaw problems that could be aggravated by the constant chewing action, or any swallowing difficulties such that the gum could present a choking hazard. Also be sure to give him sugar-free gum.