77 citations · 140 across the 9 of their papers we have counts for
12 papers
Sound Focusing by Acoustic Luneburg Lens
Sang-Hoon Kim
Luneburg lens is a gradient index lens that focuses the incoming wave on the opposite side of the lens without aberration. We developed a two-dimensional acoustic Luneburg lens by…
Air transparent soundproof window
Sang-Hoon Kim, Seong-Hyun Lee
A soundproof window or wall which is transparent to airflow is presented. The design is based on two wave theories of diffraction and acoustic metamaterials. It consists of a three…
Artificial Seismic Shadow Zone by Acoustic Metamaterials
Sang-Hoon Kim, Mukunda P. Das
We developed a new method of earthquakeproof engineering to create an artificial seismic shadow zone using acoustic metamaterials. By designing huge empty boxes with a few side-hol…
Seismic Waveguide of Metamaterials
Sang-Hoon Kim, Mukunda P. Das
We have developed a new method of an earthquake-resistant design to support conventional aseismic designs using acoustic metamaterials. We suggest a simple and practical method to…
Retroreflector Approximation of a Generalized Eaton Lens
Sang-Hoon Kim
We extended a previous study of the Eaton lens at specific refraction angles to the Eaton lens at any refraction angle. The refractive index of the Eaton lens is complicated and ha…
Generalized Eaton Lens at Arbitrary Refraction Angles
Sang-Hoon Kim
We extended the refraction angle of the Eaton lens into arbitrary angles. The refractive index of the Eaton lens is not analytical and can be obtained by numerical calculations onl…