In Sensitive Compartmented Information Facility (SCIF) rooms, utilizing an RF shielded door for an information vestibule adds an extra layer of protection. RF shielded doors have emerged as an ideal option for the outer opening of an information vestibule, due to the door’s hybrid capabilities of having an STC 50 rating along with shielding properties. SCIF rooms often have acoustic security requirements including denying aural access to classified information. While schools, boardrooms, or performing arts centers recommend STC 40 to 50 ratings, a SCIF compliant door must meet the ICD/ICS 705 standard determined by the Department of Defense in the United States and is typically STC rated at 50 or 55.