This report will document and analyze the process of making a simple audio equalizer that will be able to output stable sound through a speaker. The equalizer testing process will be divided into four steps: filters, operational amplifiers(op amps), summing amplifier, and finally an audio amplifier. To test the filters, I will use the Frequency Response Analysis(FRA) tool on the oscilloscope to see if the -3dB values match the deliverables. To test the rest, which mainly consists of op amps, I can measure the VRMS values when the wipers are maxed out or lowered all the way down and compare those values with the deliverables. Additionally, from the VRMS values we can calculate how much power is flowing into our speaker. Finally, we will use the FRA tool to see if our frequency response is a straight line, meaning our output doesn't have a lot of noise when different frequencies are going through the circuit. This experiment is relevant because in the real world because speakers are built using almost the same way as our experiment: filters and op amps.
Audio Equalizer
December 14, 2022