Hi,
Sorry everyone is having these experiences with their loved ones’ behavior and communication changes, especially whispering. You’ve all shared many possible factors, including changes in control over facial muscles, weakness, hearing impairment and or behavioral “selective hearing, “ problems with word retrieval or speech, and honestly the phenomenon we know as “showtiming,” or trying harder for other family and visitors or at doctors visits.

I’d like to add another perspective as someone living through this personally with my spouse, who has Vascular Parkinsonism after 7 strokes - and my experience as a licensed behavioral health clinician. Whispering very frequently also increases with episodic hallucinations, and different levels of paranoia that we see with Dementia and stroke patients. They will frequently whisper to their trusted family member in person or on the phone, especially if they are in a healthcare facility. The paranoia may be strictly from the changes to the brain, but can also come with medication changes or time of day or environment. Hope this perspective helps.