Phones Touch Tones Lab

Description of Lab:

For this lab, we recorded the noises made by each number on our phone keyboard. Using a microphone and going key by key on speakerphone, we measured the frequencies produced. Afterwards, we looked for patterns between the different frequencies and their relationship on the keyboard.

Goal of Lab:

The goal was to investigate the relationship between the frequencies made by the different keys on our phone. We looked at the frequencies of the noise made by each of the numbers on a phone keyboard, and in doing so, we found a pattern related to each key's location on the keyboard.

Data:

1: 698 and 1200
2: 700 and 1335
3: 700 and 1477
4: 760 and 1200
5: 769 and 1335
6: 760 and 850
7: 850 and 1200
8: 850 and 1335
9: 850 and 1477
*: 940 and 1200
0: 940 and 1335
#: 940 and 1477

Conclusion:

We learned that each column had an assigned frequency, as did each row. The peaks on our graph represented these two. The first peak represented the row value, and the second peak represented the column value