Protecting one's hearing is always a smart thing to do. Hearing-aid manufacturer GN ReSound (GNR) believes that improving one's hearing is just as smart.
Here's a good bar-bet question: What is the most American-made vehicle in the United States? The Ford F-150? The Chevrolet Corvette? Close, but no cigar.
Although headquartered in Gothenburg, Sweden, the Volvo Group manufactures nearly all of its engines at factories in Skovde, Sweden; Hagerstown, MD; and Lyon, France. The Lyon facility produces various types and sizes of engines for Volvo and Renault trucks.
Like any technology, welding continues to evolve. This is especially true for a technique known as flash-butt welding, which has been around since the early 20th century.