NASA NTRS · 19750002279
Acoustic grazing flow impedance using waveguide principles
Abstract
A grazing flow apparatus was designed to measure the impedance of acoustic materials when installed in environments that subject the material to grazing airflow. The design of the apparatus and the data analysis technique is based on the solution of the convected wave equation in an infinite length waveguide.
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Armstrong, D. L.. 1971-12-12. Acoustic grazing flow impedance using waveguide principles. https://ntrs.nasa.gov/citations/19750002279
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