Print Email Facebook Twitter The NLR/NGTE joint programme on the measurement of attenuation and impedance in acoustic flow duct facilities. Title The NLR/NGTE joint programme on the measurement of attenuation and impedance in acoustic flow duct facilities. Author Zandbergen, T. Martlew, D.L. Institution National Aerospace Laboratory NLR Date 1981-03-17 Abstract The National Aerospace Laboratory NLR in the Netherlands and the National Gas Turbine Establishment NOTE operate similar acoustic flow duct facilities but with differences in their respective approaches to the measurement of attenuation and impedance of duct linings. A joint exercise was arranged with the object of comparing methods and results, particularly the direct measurement of impedance with its inference from attenuation measurements. Subject Aircraft enginesAeroacousticsAcoustic measurementsAcoustic transducersLiningsAcoustic ductsTest facilitiesAcoustic impedanceTransmission lossInsertion loss To reference this document use: http://resolver.tudelft.nl/uuid:d7fb0db2-5298-4afd-95a5-404ef0420639 Publisher Nationaal Lucht- en Ruimtevaartlaboratorium Access restriction Campus only Source NLR-TR 81032 U Part of collection Aerospace Engineering Reports Document type report Rights (c)1981 National Aerospace Laboratory NLR Files PDF NLR_TR_81032_U.pdf 15.08 MB Close viewer /islandora/object/uuid:d7fb0db2-5298-4afd-95a5-404ef0420639/datastream/OBJ/view