This presentation provides a review of tools used by the NASA Langley Research Center over the last four decades to experimentally characterize acoustic liners for aircraft noise reduction. Descriptions of past and present NASA test rigs are included to provide context for the application of data acquisition and analysis methods. These test rigs range from simple applications of a raylometer to a waveguide with detailed control over higher-order modes. Methods for impedance eduction based on data acquired in these test rigs are explored in some detail. Strengths and weaknesses of each data acquisition and analysis method are presented, as well as current practices applied in the NASA Langley Liner Technology Facility.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Experimental Characterization of Acoustic Liners


    Contributors:
    M. Jones (author)

    Publication date :

    2023


    Size :

    51 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English






    Optimized multisectioned acoustic liners

    BAUMEISTER, K. | AIAA | 1979


    Acoustic treatment of passenger liners

    Shearer, K. | Engineering Index Backfile | 1962


    Aerodynamic Optimisation of Acoustic Liners

    Shahzad, Haris / Hickel, Stefan / Modesti, Davide | AIAA | 2024