WorldCat Identities

Reeder, D. Benjamin

Works: 1 works in 2 publications in 1 language and 14 library holdings
Roles: Author
Classifications: QC242.2,
Publication Timeline
Most widely held works by D. Benjamin Reeder
Acoustic scattering by axisymmetric finite-length bodies with application to fish : measurement and modeling by D. Benjamin Reeder( Book )

2 editions published in 2002 in English and held by 12 WorldCat member libraries worldwide

This thesis investigates the complexities of acoustic scattering by finite bodies in general and by fish in particular through the development of an advanced acoustic scattering model and detailed laboratory acoustic measurements. A general acoustic scattering model is developed that is accurate and numerically efficient for a wide range of frequencies, angles of orientation, irregular axisymmetric shapes and boundary conditions. The model presented is an extension of a two-dimensional conformal mapping approach to scattering by irregular, finite-length bodies of revolution. An extensive series of broadband acoustic backscattering measurements has been conducted involving alewife fish (Alosa pseudoharengus), which are morphologically similar to the Atlantic herring (Clupea harengus). A greater-than-octave bandwidth (40-95 kHz), shaped, linearly swept, frequency modulated signal was used to insonify live, adult alewife that were tethered while being rotated in 1-degree increments over all angles of orientation in two planes of rotation (lateral and dorsal/ventral). Spectral analysis correlates frequency dependencies to morphology and orientation. Pulse compression processing temporally resolves multiple returns from each individual which show good correlation with size and orientation, and demonstrate that there exists more than one significant scattering feature in the animal
Audience Level
Audience Level
  Kids General Special  
Audience level: 0.76 (from 0.76 for Acoustic s ... to 0.76 for Acoustic s ...)