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Go Under the Dome of Silence
April 11, 2015

Join the NASA Glenn Research Center for a tour of the Aero-Acoustic Propulsion Laboratory (AAPL), and see where some of the world's most advanced aircraft noise-reduction ideas are developed and tested. The Aero-Acoustic Propulsion Laboratory’s acoustically designed dome protects residential communities from the laboratory’s high noise levels.  Unique in size and appearance, this world-class facility stands 65-feet high and 130-feet in diameter and has 17,000 two-foot-thick fiberglass wedges mounted on its walls and floor. Designed to prevent echoes and reverberations, the wedges give the facility a futuristic, maze-like appearance.  The Nozzle Acoustic Test Rig, one of three test rigs in the AAPL, is used to evaluate jet engine nozzle noise at speeds up to 220 miles per hour.

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Tour buses depart from the Main Gate of NASA John H. Glenn Research Center at the following times:

  • 10:00 a.m.
  • 11:00 a.m.
  • 12:00 p.m.
  • 1:00 p.m.

Please note the following important guidelines:

  • Advanced registration guarantees admission to the tour that begins at the Briefing Center.
  • Access to the Saturday tour program is limited to U.S. citizens and Lawful Permanent Residents (LPRs).
  • All adult visitors are required to present government-issued photo identification, and LPRs are required to present their Permanent Resident Card. This includes bus drivers for scheduled groups.
  • NASA reserves the right to limit the use of cameras and cell phones during the tour.

More Information:
>  Facility Tour Schedule
> Glenn Research Center Events

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One of three test rigs in the Aero-Acoustic Propulsion Lab
One of three test rigs in the Aero-Acoustic Propulsion Lab, the Nozzle Acoustic Test Rig is used to evaluate jet engine nozzle noise at speeds up to 220 miles per hour.
Image Credit: 
NASA
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Page Last Updated: March 6th, 2015
Page Editor: NASA Administrator