Adaptation of the NRL Acoustic Research Tank Facility for Experiments in Parametric Sonar, with Preliminary Results
Abstract
The NRL Acoustic Research Tank Facility, with its capability for obtaining numerical planar scans and graphic recordings of radiation patterns, has been adapted for use in parametric sonar studies. In a preliminary set of experiments, the facility was used to study difference-frequency radiation from an acoustic parametric source. The source used a USRD type E8 transducer, driven simultaneously at two frequencies close to the resonance frequency of 1.5 MHz. This report describes the experimental apparatus and illustrates the flexibility of the tank facility as a research tool in nonlinear acoustics. It also presents measured values of the difference-frequency sound pressure level and a sequence of radiation patterns that illustrates beam formation in the near field of the parametric source.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 29, 1973
- Accession Number
- AD0756176
Entities
People
- Anthony I. Eller
Organizations
- United States Naval Research Laboratory