Nonlinear Acoustic Metamaterials for Sound Attenuation Applications
Abstract
We design and test nonlinear acoustic materials for amplitude dependent filtering of audible signals. We study the dynamic response of one-dimensional arrays of elastic particles in contact with each other, supported by deformable elastic rods, using experiments and numerical simulations. We study the effects of different curvatures of the support rods on the transmission of impacts and structural vibrations. We find that the combination of a nonlinear granular medium with linear support rods allows obtaining tunable filtering of the incoming signal, and selecting desired ranges of the transmitted frequency and amplitude. We conclude our study building a 3D prototype of the new filtering material using a 3D printer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 16, 2011
- Accession Number
- ADA539264
Entities
People
- Chiara Daraio
- Jinkyu Yang
Organizations
- California Institute of Technology