A typical automotive exhaust resonator is made of a hollow steel cylindrical tube and is attached to the muffler of an exhaust system. This type of resonator is designed similar to that of an acoustic resonator, which creates an âexhaust noteâ that gives the exhaust noise a less annoying and more pleasant tone.The sound can be enhanced by means of adjusting the exhaust note. typical automotive exhaust resonator is made of a hollow steel cylindrical tube and is attached to the muffler of an exhaust system. This type of resonator is designed similar to that of an acoustic resonator, which creates an âexhaust noteâ that gives the exhaust noise a less annoying and more pleasant tone.
buttonhole (plural buttonholes) 1  A hole through which a button is pushed to secure a garment or some part of one. ( 2 chiefly Britain) a flower worn in a buttonhole for decoration.
Button badges are a highly collectible round badge with a plastic coating over a design or image. They often have a metal pin back or a safety pin style back. The most popular size is 25.4-millimetre (1.00 in) but the badges can range anywhere from this size right up to 120-millimetre (4.7 in) badges. This style of badge is used in political campaigning and often given as part of a birthday greeting such as a birthday card.