This independent, table-top research project aimed to allow me to experience the gamut of research from conception to experimentation. I received a grant from the IU Graduate School for the research which in turn played a critical role in my awarding of the Goldwater Scholarship.
| Date | Summer 2003 |
|---|---|
| Primary Goals | To build and map the properties of a sonic crystal that manipulates sound in the ultrasonic range. |
| Software | Labview, root |
| Hardware | NI PCI-6036E DAQ, 3 stepper motors, 2 piezoelectric ultrasonic transducers, parabolic reflector |
A sonic crystal (SC) is an apparatus containing a arrangement of repeating structures that have the ability to manipulate sound waves. In the past SCs of larger size have been constructed and shown to focus audible sound waves. In addition, rectangular SCs have been shown to act as a Fabry-Perot interferometer. At the time of this project, no research could be found on SCs that manipulatedultrasonic waves.
The SC manipulated the ultrasonic sound field, but not in the same
manner as its audible counterpart. Producing a computer simulation of
the setup was beyond the scope of the project, so no reference
existed for comparison. Ultimately the sound field of several
SC shapes were mapped and plotted.
Sound Field Plots
Just the Speaker
Empty SC Case
Focusing SC
Rectangular SC
Powerpoint Presentation
Photo of Experimental Setup
Photo of a Focusing SC --
Along with the ultrasonic speaker and parabolic reflector.
Photo of Stepper Motor --
One of three computer controlled motors used for
automated data collection.
