Comparison of different measurement technologies for the in-flight assessment of radiated acoustic intensity | Zendy

Jacob Klos | Zendy; Daniel L. Palumbo | Zendy; Ralph D. Buehrle | Zendy; Earl G. Williams | Zendy; Nicolas Valdivia | Zendy; Peter C. Herdic | Zendy; Bernard J. Sklanka | Zendy

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Comparison of different measurement technologies for the in-flight assessment of radiated acoustic intensity

Author(s) -

Jacob Klos,

Daniel L. Palumbo,

Ralph D. Buehrle,

Earl G. Williams,

Nicolas Valdivia,

Peter C. Herdic,

Bernard J. Sklanka

Publication year - 2005

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4779528

Subject(s) - fuselage , acoustics , microphone array , sound intensity , microphone , intensity (physics) , sound intensity probe , flight test , noise (video) , sound transmission class , acoustic holography , computer science , physics , aerospace engineering , optics , near and far field , sound (geography) , sound pressure , sound power , engineering , critical distance , artificial intelligence , image (mathematics)

Near‐field acoustical holography (NAH) microphone array measurement technologies are currently being investigated for use in aircraft for determining the sound intensity that is radiated through a trimmed aircraft fuselage. Two types of microphone array geometries are studied in this effort, spherical and conformal to the sidewall. Due to the complexity of the interior sound field and in‐flight excitation, questions have arisen concerning the capability of array techniques to measure these desired acoustic quantities. The main questions relate to the agreement between array measurements and traditional two‐microphone intensity probe measurements and the sensitivity of array measurements to backside sources present in the aircraft cabin. Thus, an investigation was performed in which the NAH array results were compared to intensity probe results measured in the NASA Langley Structural Acoustic Loads and Transmission facility, the Boeing Interior Noise Test Facility, and in flight on the NASA Aries 757 aircr...

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