Excited audience members in Australia. Stimulation or sensory excitation is the action of various agents or forms of energy (stimuli) on receptors that generate impulses that travel through nerves to the brain (afferents).
Auditory Hallucinations. Theses auditory, or aural, hallucinations are the most common type of schizophrenia hallucination. They are a disruption of the normal hearing process, involving hearing annoyances such as clicks, hums, or screeches, and can be as complex as hearing complete voices.
Hallucinations are where someone sees, hears, smells, tastes or feels things that don't exist outside their mind. They're common in people with schizophrenia, and are usually experienced as hearing voices. Hallucinations can be frightening, but there's usually an identifiable cause. For example, they can occur as a result of: taking illegal drugs or alcohol. a mental illness, such as schizophrenia or dementia.