Part 1 of Essay
produce clear, pure tones when struck by a mallet or suspended clapper. A wind chime usually consists of a set of individual alloy rods, tuned by length to a series of intervals considered pleasant. These are suspended from a devised frame in such a way that a centrally suspended clapper can reach and impact all the rods. ....

Part 2 of Essay
.... same as that of the rod-- when struck, the rod would transfer vibration to the enclosed air as well as directly to the atmosphere, resulting in a louder tone. A hard connection between rods and frame would also accomplish this result somewhat; the vibrations of each seperate rod would be commuted to the others, resulting in more vibrating surface area (and hence, more volume). The transmission of the chime's sound without the abovementioned alterations is quite simple; each rod releases longitudinal waves radi ....