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Acoustic Performance of a Real-Time Three-Dimensional Sound-Reproduction SystemThe Exterior Effects Room (EER) is a 39-seat auditorium at the NASA Langley Research Center and was built to support psychoacoustic studies of aircraft community noise. The EER has a real-time simulation environment which includes a three-dimensional sound-reproduction system. This system requires real-time application of equalization filters to compensate for spectral coloration of the sound reproduction due to installation and room effects. This paper describes the efforts taken to develop the equalization filters for use in the real-time sound-reproduction system and the subsequent analysis of the system s acoustic performance. The acoustic performance of the compensated and uncompensated sound-reproduction system is assessed for its crossover performance, its performance under stationary and dynamic conditions, the maximum spatialized sound pressure level it can produce from a single virtual source, and for the spatial uniformity of a generated sound field. Additionally, application examples are given to illustrate the compensated sound-reproduction system performance using recorded aircraft flyovers
Document ID
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Faller, Kenneth J., II
(California State Univ. Fullerton, CA, United States)
Rizzi, Stephen A.
(NASA Langley Research Center Hampton, VA, United States)
Aumann, Aric R.
(Analytical Services and Materials, Inc. Hampton, VA, United States)
Date Acquired
August 27, 2013
Publication Date
June 1, 2013
Subject Category
Report/Patent Number
Funding Number(s)
WBS: WBS 877868.
Distribution Limits
Public Use Permitted.
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