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.
Keyâ²hole, the hole in which a key of a door, &c., is inserted; Keyâ²note, the key or fundamental note of a piece of music; any central principle or controlling thought; Keyâ²-pin, the pivot on which a pipe-key turns: a pin serving as fulcrum for a key of an organ, &c.; Keyâ²-plate, the escutcheon around a keyhole; Keyâ²ring, a ring for holding a bunch of keys; Keyâ²-seat, a groove for receiving a key, to prevent one piece of machinery from turning on another; Keyâ²stone, the stone at ...