Date of Award

4-2012

Degree Name

Master of Science in Engineering

Department

Mechanical and Aerospace Engineering

First Advisor

Dr. Koorosh Naghshineh

Second Advisor

Dr. Kapseong Ro

Third Advisor

Dr. Richard Hathaway

Keywords

Anechoic, termination, catenoid, reflection, transmission loss

Access Setting

Masters Thesis-Open Access

Abstract

An analytical model is developed in this thesis to predict the reflection coefficient of an anechoic termination consisting of a catenoidal horn connected to a tube lined with absorbing material. The theoretical predictions are compared to experimental measurements on a prototype. Comparisons are made for a variety of arrangements, including, an open horn, and a horn connected to absorbing terminations of two different lengths. The absorbing terminations are either open or closed to the environment and the analytical model can account for both these scenarios. The results indicate that the new model can accurately predict the reflection coefficient for each case presented, especially at low frequencies and for long absorbing terminations. A comparison with experimentally measured reflection coefficient is made between the analytical model presented in this thesis and the model of Bolton [1] in order to highlight the improvement over existing models.

Comments

This thesis is unavailable because permission has not been granted by the author.

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