General Dynamics Advanced Information Systems (GDAIS) technician Paul Schley fits miniature microphones in the ears of test subject Beth Greschner, also of GDAIS. The microphones record sound levels equivalent to those experienced by astronauts during sp
General Dynamics Advanced Information Systems (GDAIS) technician Paul Schley fits miniature microphones in the ears of test subject Beth Greschner, also of GDAIS. The microphones record sound levels equivalent to those experienced by astronauts during space shuttle liftoff (photo by Chris Gulliford, AFRL Human Effectiveness Directorate).