PROJECT ARTEMIS ACOUSTIC SOURCE PERFORMANCE CHARACTERISTICS
Abstract
The Artemis acoustic source was designed to meet the requirements for an ocean surveillance study program. These requirements included a source level of 152 dB in a 100-Hz band centered at 400 Hz with a transducer operating depth of 1200 feet. The transducer, which was completed in June 1964, is a rectangular planar array 33 feet wide and 50 feet high. It is composed of 1440 variable-reluctance elements which are driven in parallel from a linear electronic amplifier. The source is installed aboard a modified T-2 class tanker having a well amidship through which the transducer array is lowered and retrieved. Initial tests of the partially completed source had revealed a severe acoustic interaction problem which imposed a restriction on the operating power level. A study program was initiated and experiments were conducted to investigate the interaction behavior and to discover means to alleviate its effects. Results demonstrated that improved performance could be obtained by modifying the original series-parallel connection of elements to an all-parallel form. The indicated modification was performed concurrent with the completion of the transducer array.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1967
- Accession Number
- AD0382670
Entities
People
- C. R. Rollins
- R. H. Ferris
Organizations
- United States Naval Research Laboratory