US Patent Issued to Korea University Research and Business Foundation on Jan. 28 for "High frequency noise filtering earplug using metasurface" (South Korean Inventors)

ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,207,990, issued on Jan. 28, was assigned to Korea University Research and Business Foundation (Seoul, South Korea).

"High frequency noise filtering earplug using metasurface" was invented by Young June Moon (Seoul, South Korea) and Hyung Keun Chung (Seongnam-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Proposed is an earplug that can effectively reduce high-frequency noise using a metasurface. The high-frequency noise filtering earplug using a metasurface according to an embodiment of the present disclosure may include an eartip with an internal passage, an interference attenuation module having a damping passage for reducing noise and...