US Patent Issued to TOA on April 8 for "Public address device, howling suppression device, and howling suppression method" (Japanese Inventor)

ALEXANDRIA, Va., April 9 -- United States Patent no. 12,273,692, issued on April 8, was assigned to TOA Corp. (Hyogo, Japan).

"Public address device, howling suppression device, and howling suppression method" was invented by Toshimitsu Suetsugu (Hyogo, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An object is to provide a public address device that effectively prevents occurrence of howling without a drop of the gain. A public address device 100 includes: a loudspeaker 1 that generates a reproduced sound on the basis of a loudspeaker driving signal u(n); a microphone 2 that collects the reproduced sound and an input sound v(n) to generate a microphone-collected-sound signal y(n); a first filter 301 ...