A touchtone telephone of 12 buttons is arranged in four rows

A touch-tone telephone of 12 buttons is arranged in four rows and three columns. The arrangement provides 12 distinct signals by using seven tones divided into two groups: the low-frequency group (697 to 941 Hz) and the high-frequency group (1, 209 to 1,477 Hz), as it is shown below Using matlab, design a passive filter for Image I that will filter the range of frequencies for each buttons according to their high-band and low-band frequency. The purpose of the program is to collect 10 frequencies from the user, test the input frequency through the filter for each run, and store the number that each button is pressed for each run. At the end, the program shall display the number of times that each button was pressed with their respect range of frequencies.

Solution

12