US Patent Issued to SOUTHEAST UNIVERSITY on July 28 for "Method for measuring normal incidence sound absorption coefficient of non-standard sized samples" (Chinese Inventors)

ALEXANDRIA, Va., July 28 -- United States Patent no. 12,693,267, issued on July 28, was assigned to SOUTHEAST UNIVERSITY (Nanjing, China).

"Method for measuring normal incidence sound absorption coefficient of non-standard sized samples" was invented by Hequn Min (Nanjing, China) and Huading Lou (Nanjing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for measuring the normal incidence sound absorption coefficient of anon-standard sized sample is provided. First, a PAM having a specific acoustic impedance and a same thickness is arranged next to the non-standard sized sample to form a flat-surface IAIS having a same cross section as an impedance tube; a relational expression between a surface ...