AFRL Tests Next-Generation NASA Communications System

  • Published
  • By Human Effectiveness Directorate
  • AFRL/HE
Air Force Research Laboratory engineers are testing a next-generation hearing protection and communications system for astronauts. The new system is designed for use inside the National Aeronautics and Space Administration's advanced crew escape suit during the remaining space shuttle missions. During liftoff, astronauts in the shuttle crew compartment experience noise levels of approximately 115 dB sound pressure level for less than one minute. AFRL engineers used the lab's 50,000 W microphone-inreal-ear facility to perform tests reproducing shuttle launch sound levels. While the test data will help NASA determine whether astronauts are exposed to potentially harmful noise levels during missions, it will also aid researchers focused on ensuring that communications remain as clear as possible throughout the all-important launch period.

ACES is a fully pressurized system that includes a bright orange full-body suit; a launch/entry helmet that attaches to the suit with locking rings; and a communication carrier assembly (also known as the "Snoopy cap"), which is worn under the helmet and contains protective ear caps and microphone boom assemblies. While the suit's primary use is for shuttle launch and entry, astronauts also wear ACES during any on-orbit emergency situations to protect themselves from exposure to the elements and contain themselves within a safe atmosphere.

NASA's upgraded technology and AFRL's related assessment techniques could also help guide the design of a helmet and communications system for NASA's Constellation program, a recently initiated space exploration mission geared towards returning humans to the moon and then pursuing Mars and other solar system destinations. To improve astronaut comfort, NASA plans to incorporate a dual-microphone system with a shorter boom that can adjust to accommodate a range of head shapes and sizes. The current, fixed-position boom sometimes results in the microphone being too far away from smaller crew members.