IRVINE

A jet noise expert will discuss progress toward quieter airplanes at a free lecture at 4 p.m. Tuesday at UC Irvine. John M. Seiner, associate director for the Center for Physical Acoustics at the University of Mississippi, has researched noise suppression for aircraft, a hot topic in the county because of the proposed international airport at the El Toro Marine Corps Air Station. Information: (949) 824-5406.