NASA NTRS · 19740000050
High-directivity acoustic antenna
Abstract
Acoustic antenna with unique electronic steering control is used to identify and define aerodynamic noise sources in free field, particularly in wind tunnel which is quite reverberant. Provision is made for high directivity as well as improved discrimination against unwanted background noise such as reverberation or echoes.
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El-Sum, H. M. A.. 1974-05-01. High-directivity acoustic antenna. https://ntrs.nasa.gov/citations/19740000050
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