125 citations · 125 across the 1 of their papers we have counts for
5 papers
Origin of Negative Density and Modulus in Acoustic Metamaterials
Sam Hyeon Lee, Oliver B. Wright
This paper provides a review and fundamental physical interpretation for the effective densities and moduli of acoustic metamaterials. We introduce the terminology of hidden force…
Acoustic metamaterial exhibiting four different sign combinations of density and modulus
Yong Mun Seo, Jong Jin Park, Seung Hwan Lee +3
We fabricated a double negative acoustic metamaterial which consisted of Helmholtz resonators and membranes. Experimental data on the transmission and dispersion relation are prese…
Reverse Doppler Effect of Sound
Sam Hyeon Lee, Choon Mahn Park, Yong Mun Seo +2
We report observation of reverse Doppler effect in a double negative acoustic metamaterial. The metamaterial exhibited negative phase velocity and positive group velocity. The disp…
Negative Effective Density in An Acoustic Metamaterial
Sam Hyeon Lee, Choon Mahn Park, Yong Mun Seo +2
We report theoretical and experimental results for a new type of homogenized acoustic metamaterials with negative effective mass density. We constructed one-dimensional metamateria…
Acoustic Metameterial with Negative Modulus
Sam Hyeon Lee, Choon Mahn Park, Yong Mun Seo +2
We present experimental and theoretical results on an acoustic metamaterial that exhibits negative effective modulus in a frequency range from 0 to 450 Hz. One-dimensional acoustic…