Use a capacitor, a resistor and an operational amplifier circuit to design an active first order low pass filter which passes frequencies that human can hear (below 15kHz). Show all the calculations required to find the values of all the passive components used in this amplifier circuit and sketch a circuit diagram for your design. Hint: assume the required value of capacitor. It should be less than 0.1 μF (for better
frequency stability) then calculate the value of R.