- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
- The objectives are: measurement of dynamic properties of acoustical foams and incorporation of these properties in models governing three-dimensional wave propagation in foams; tests to measure sound transmission paths in the HP137 Jetstream 3; and formulation of a finite element energy model. In addition, the effort to develop a numerical/empirical noise source identification technique was completed. The investigation of a design optimization technique for active noise control was also completed. Monthly progress reports which detail the progress made toward each of the objectives are summarized.
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 19880010706.
Accession ID: 88N20090.
- No Copyright.
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