Experimental realization of a nonlinear acoustic lens with a tunable focus
Abstract
We realize a nonlinear acoustic lens composed of a two-dimensional array of sphere chains interfaced with water. The chains are able to support solitary waves which, when interfaced with a linear medium, transmit compact pulses with minimal oscillations. When focused, the lens is able to produce compact pressure pulses of high amplitude, the “sound bullets.” We demonstrate that the focal point can be controlled via pre-compression of the individual chains, as this changes the wave speed within them. The experimental results agree well both spatially and temporally with analytical predictions over a range of focus locations.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 06, 2014
- Source ID
- 10.1063/1.4857635
Entities
People
- Carly M. Donahue
- Chiara Daraio
- Luca Bonanomi
- Paul W. J. Anzel
- Thomas A. Keller
Organizations
- California Institute of Technology
- ETH Zurich
- Office of Naval Research