Research has repeatedly shown that familiar and unfamiliar voices elicit different neural responses. But it has also been suggested that different neural correlates associate with the feeling of having heard a voice and knowing who the voice represents. The terminology used to designate these varying responses remains vague. creating a degree of confusion in the literature. https://www.roneverhart.com/Doorking-2108-080-eVolve-Smart-Video-Intercom-System/