The Exterior Effects Room (EER) is a psychoacoustic test facility located at the NASA Langley Research Center, with a real-time simulation environment that includes a three-dimensional sound-reproduction system. The main purpose of the EER is to support research investigating human response to aircraft community noise. To compensate for the spectral coloration of the installation and room effects, the system required real-time application of equalization filters. The efforts taken to design, implement, and analyze the equalization filters for use in the real-time sound-reproduction system is described. Acoustic performance of the system was assessed for its crossover performance and stationary and dynamic conditions.
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