The ATL consists of a fully vibration-isolated anechoic/hemi-anechoic test chamber with 21 ft by 17 ft by 17 ft (h) interior working dimensions. A 36 inch deep fiberglass anechoic wedge treatment with a high-open-area perforated metal facing provides 99% normal incidence sound absorption at frequencies at and above 100 Hz. Measurements as low as 50 Hz can be conducted with engineering grade precision (applicable frequency ranges depend on test requirements and specifics of the item under test). Removable floor wedge carts allow the facility to be configured as either a hemi-anechoic or fully anechoic chamber.

The ATL test chamber and control room were manufactured and installed by Eckel Industries.

For more information about the ATL Test Chamber, see the following publication:

Cooper, Beth A. "Design and Construction of a Convertible Hemi/Anechoic Acoustical Laboratory for Testing Spaceflight Hardware at the NASA Glenn Research Center." Proceedings of Noise-Con 2000. Newport Beach, CA. 03-05 Dec. 2000. (.pdf file)

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