Acoustics – Sound-modifying means
Patent
1985-09-09
1986-12-02
Fuller, Benjamin R.
Acoustics
Sound-modifying means
181158, 181242, H05K 500
Patent
active
046258280
ABSTRACT:
A flush-dish microphone system for measuring aircraft flyover noise is disclosed. The system includes an acoustically hard base supporting a microphone. The base is configured along its periphery to define a plurality of outwardly extending tapered members. Each of the tapered members includes a pair of converging edges that are each at least in part curved. The curved edges produce a favorable progressive match of acoustic impedance at the ground/tapered member boundary that reduces edge diffraction contamination of the noise signal being measured by the microphone.
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Miller Wendell R.
Shivashankara Belur N.
Stubbs Gene W.
Fuller Benjamin R.
The Boeing Company
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