ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,538,081, issued on Jan. 27, was assigned to PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA (Torrance, Calif.).

"Sound measuring device" was invented by Risako Tanigawa (Osaka, Japan), Toshiyuki Matsumura (Osaka, Japan) and Yuki Terashima (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A sound measuring device includes: a light source that emits a laser beam; a frame including at least one reflective surface that faces a predetermined space through which sound travels, and transversely surrounds the predetermined space with respect to a sound propagation direction; and a light receiver that receives the laser beam multiply reflected ...