The sound frequency of two metals?

Have any studies been done on the elastic properties of two unlike metals? I have noted a difference in the sound frequency of different horseshoes. Specifically, what is the effect of a horseshoe of one frequency striking a stake of another? I also assume that the speed of the strike is important, as well as the location struck. Are there any simple formula that provide answers? I am assuming that there is a direct correlation between frequency and vibration. Thank You