ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,513,449, issued on Dec. 30, was assigned to DEVIALET (Paris).
"Noise canceling audio headset" was invented by Emil Garnell (Paris) and Vu Hoang Co Thuy (Paris).
According to the abstract* released by the U.S. Patent & Trademark Office: "The headset includes an electro-acoustic transducer, at least one noise reduction processing chain including external and internal microphones, a processing filter including mounted in parallel between the external microphone and an adder, at least one elementary filter each including a recursive filter and an elementary variable gain amplifier, a control unit for the gain of each elementary amplifier according to a signal coming from the external mic...