Stealth acoustic materials

Abstract

We report the experimental design of a 1D stealth acoustic material, namely a material that suppresses the acoustic scattering for a given set of incident wave vectors. The material consists of multiple scatterers, rigid diaphragms, located in an air-filled acoustic waveguide. The position of the scatterers has been chosen such that in the Born approximation a suppression of the scattering for a broad range of frequencies is achieved and thus a broadband transparency. Experimental results are found in excellent agreement with the theory despite the presence of losses and the finite size of the material, features that are not captured in the theory. This robustness as well as the generality of the results motivates realistic potential applications for the design of transparent materials in acoustics and other fields of wave physics.

References in corpus (19)

• Achieving transparency with plasmonic coatings
• Local Density Fluctuations, Hyperuniformity, and Order Metrics
• Localization of ultrasound in a three-dimensional elastic network
• Designer disordered materials with large complete photonic band gaps
• Isotropic Band Gaps and Freeform Waveguides Observed in Hyperuniform Disordered Photonic Solids
• Experimental observation of the mobility edge in a waveguide with correlated disorder
• Broadband reflectionless metasheets: Frequency-selective transmission and perfect absorption
• Classical Disordered Ground States: Super-Ideal Gases, and Stealth and Equi-Luminous Materials
• Hyperuniformity and its Generalizations
• Direct determination of the transition to localization of light in three dimensions
• Photonic band gap in isotropic hyperuniform disordered solids with low dielectric contrast
• Ensemble Theory for Stealthy Hyperuniform Disordered Ground States
• Slow sound propagation in lossy locally resonant periodic structures
• Nondiffractive sonic crystals
• Evidences of evanescent Bloch waves in Phononic Crystals
• Enhancement of localization in one-dimensional random potentials with long-range correlations
• Hyperuniform disordered phononic structures
• Tunable wideband bandstop acoustic filter based on 2D multi-physical phenomena periodic systems
• Transmission in waveguides with compositional and structural disorder: experimental effects of disorder cross-correlations

Cited by in corpus (10)

• Multifunctional Composites for Elastic and Electromagnetic Wave Propagation
• Generating large disordered stealthy hyperuniform systems with ultra-high accuracy to determine their physical properties
• Optimized Large Hyperuniform Binary Colloidal Suspensions in Two Dimensions
• Extraordinary Optical and Transport Properties of Disordered Stealthy Hyperuniform Two-Phase Media
• Dynamical properties of particulate composites derived from ultradense stealthy hyperuniform sphere packings
• Existence of Nonequilibrium Glasses in the Degenerate Stealthy Hyperuniform Ground-State Manifold
• Quantifying when hyperuniformity of a many-particle system leads to uniformity across length scales
• Hyperuniformity of Weighted Particle Systems
• Tunable phononic transparency and opacity with isotopic defects
• Predictive Formulas for Scattering Mean Free Path for General Disordered Dielectric Media Beyond the Long-Wavelength Regime