ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,490,017, issued on Dec. 2.
"Method and arrangement for producing sound in an electronic device" was invented by Petri Soronen (Oulu, Finland) and Petteri Luukkanen (Oulu, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "An arrangement for producing sound in an electronic device comprises a magnetic vibrator comprising a first part and a second part provided with permanent magnets, and at least one induction coil. The arrangement further comprises a piezoelectric vibrator comprising piezoelectric material for generating audio-frequency vibrations resulting from deformations of the material by supplying to said material a second electrical signal. Th...