ALEXANDRIA, Va., April 9 -- United States Patent no. 12,270,165, issued on April 8, was assigned to Sealed Air Verpackungen GmbH (Alsfeld, Germany).
"Sound absorber" was invented by Ralf Dirnberger (Oberndorf bei Salzburg, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a sound absorber (1) for a traffic route noise protection wall, wherein the sound absorber (1) comprises at least one plastic foam board (2). According to the invention, a first surface (3) of the plastic foam board (2) has a predeterminable number of sound absorber recesses (4) for predetermination of the absorption behavior with a predeterminable frequency response, wherein each of the sound absorber recesses...