The system re-scans a 640 X 480 pixel image 60 times a second. The light beam's final pass bounces off a small reflecting surface before entering the eye for imaging on the retina. Reference Aviation Week, July 1996. Digital data allows more information processing of additional parameters with the recording length of 25 hours of flight. Modern CVRs can be solid state units with high reliability and survivability.
Microphones can record up to four separate audio tracks.
The cockpit area ambient microphone is located near the center of the cockpit in order to pick up audio alarms and other cockpit sounds. The capsule must withstand an impact of 3400 Gs. Crush resistance is tested by applying 5000 pounds for 5 minutes. Reference Aerospace Engineering, June 1997. CCD sensor Visible light sensors that can emulate the human eye retina can reduce the amount of data processing normally necessary.