👉 Devocalisation, also known as vocal stasis or silent speech, is a condition where the voice does not change in pitch during speech. It occurs when the brain is shut down from receiving auditory input and therefore has no way of changing its pitch. This can happen due to various medical conditions such as epilepsy, hearing loss, stroke, and certain types of cancer. In this condition, the brain continues to produce sound waves with a constant frequency, but it does not change in pitch during speech.
