3 papers
cs.SD2025
An accurate measurement of parametric array using a spurious sound filter topologically equivalent to a half-wavelength resonator
Woongji Kim, Beomseok Oh, Junsuk Rho +1
Parametric arrays (PA) offer exceptional directivity and compactness compared to conventional loudspeakers, facilitating various acoustic applications. However, accurate measuremen…
cond-mat.mes-hall2025
Underwater Willis lens for broadband low-frequency focusing
Beomseok Oh, Dongwoo Lee, Yeon-Seong Choo +4
Broadband underwater sound focusing in the low-frequency range is essential for various applications such as battery-free environmental monitoring and sensing. However, achieving l…
physics.app-ph2024
Bound States-to-Bands in the Continuum in Cylindrical Granular Crystals
Yeongtae Jang, Seokwoo Kim, Dongwoo Lee +2
We theoretically investigate and experimentally demonstrate that genuine bound states in the continuum (BICs) -- polarization-protected BICs -- can be completely localized within f…