quality:corruption
Types

If categorized by patients' subjective feelings about where the voices come from, audible thoughts can be either external or internal. Patients reporting an internal origin of the hallucination claim that the voices are coming from somewhere inside their body, mainly in their own heads, while those reporting an external origin feel the voice as coming from the environment. The external origins vary in the patients' description: some hear the voice in front of their ears, some attribute the ambient surrounding noise, like running water or wind, as the source. This sometimes influences patients' behaviours as they believe people around them can also hear these audible thoughts, therefore they may avoid social events and public places to prevent others from hearing their thoughts. Besides, study suggests that the locus of the voice may change as the patients' hallucinations develop. There's a trend of internalization of external perceptions, which means patients will locate the source of their hallucination from external objects to internal subjectivity over time.