Could hearing imaginary sound be early symptoms of dementia?

Not really. It is just a symptom of high Dopamine should not scare u at all.The brain can play tricks on u in all the senses auditory visual oifactory gustatory and kinesthestic so all senses can be involved and Dopamine is the neurotransmitter which plays the trick when human being hallucinate as the threshold which filters so medicine which decrease Dopamine which may be increased due to many. Reasons is rx.