I can provide information based on what is known about PTSD and flashbacks.
During a PTSD flashback, individuals often feel as though they are reliving a traumatic event from their past. The experience can be distressing and overwhelming, and it may involve vivid sensory perceptions, intense emotions, and a strong sense of being back in the traumatic situation. While some people may vocalize or talk during a flashback, it is not a universal experience. The manifestation of PTSD symptoms can vary from person to person.
In some cases, a person might speak or make sounds as part of their response to the flashback, while others may be completely silent or have minimal external reactions. The main characteristic of a flashback is the re-experiencing of the trauma in a way that makes the person feel as though the event is happening in the present moment.
It's important to remember that if you or someone you know is struggling with PTSD or any mental health condition, seeking professional help from a mental health professional is essential for proper evaluation and treatment. Mental health professionals can provide guidance, support, and appropriate interventions to help individuals cope with PTSD and its symptoms.