Andy

Video Abstract

Marimba in Action and Building Process

Presentation

Graphs and Discussion

This graph of the length of each bar in centimeters vs. its frequency in Hertz illustrates the inverse relationship between the two variables. The line of best fit running through the points would have a negative slope. As the length increases, the frequency decreases, resulting in a lower note. However, this is not a perfectly inverse relationship of Velocity=length*frequency (as you can see from the graph, a bar that produces a note of 400Hz is not half as long as one that produces a note of 200Hz.) This is due to the visual choice of marimba having bars evenly gradated to have adjacent bars change by a constant length. Also, by changing the undercut of each bar, one can alter the note's frequency quite drastically without even changing the length of the bar.