Water Tunnel Downstream Array (ARL No. 02-16) Design and Test Report
Abstract
A four-ring, broadband receiver array was designed, fabricated, and tested by the Applied Research Laboratory at Pennsylvania State University to replace the existing downstream array in the large diameter water tunnel. The new array (ARL no. 02-16) provides a substantially larger frequency-operating band (0.5 to 200 kHz) than the previous array. The array is fabricated from 1-3 composite materials and has four separate ring channels and a sum (all four rings) channel, which, along with the preamplifier, incorporates amplitude shading to provide low sidelobe levels (typically less than -30 dB). The array and preamplifier exhibit low noise levels that are less than 20 dB re: micron Pa/Hz(sup 1/2) for the sum channel over the majority of the operating band. This material is based upon work supported by the Office of Naval Research through the Naval Sea Systems Command under Grant No. N00014-01-1-0311, Instrumentation and Equipment Upgrades to Improve Acoustical and Fluid Dynamic Measurements in the Garfield Thomas Water Tunnel. (8 tables, 27 figures, 1 ref.)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 27, 2003
- Accession Number
- ADA418375
Entities
People
- B. L. Kline
- C. W. Allen
- E. C. Myer
Organizations
- Pennsylvania State University