Abstract by Adam Kingsley
Physics and Astronomy
Understanding Super-Resolution in Time-Reversal Acoustics
Acoustic time-reversal uses impulses responses to focus one or more signals to a single point in space. The focusing signal-to-noise ratio can be improved by reducing the spatial extent of the focus. Under typical conditions, this tightening of the focus is limited by the wavelength of the signal. However, improved focusing has been shown by other researchers to be possible under special conditions. The presence of many scatterers in the near-field of the source/detector has been shown to create a focus with dimensions much smaller than a wavelength. Research is being planned to use reciprocal time-reversal techniques to better understand the methods by which this super-resolution is possible and ways that it can be improved and utilized.