This lab was all about oscilloscopes, and learning how to calibrate them to get effective voltage readings. I found this process to be pretty intuitive, and it wasn't too difficult to figure out the Volt/Div and Rate values needed to get a clear signal. As for the actual results, my data really doesn't show anything definitive.
Here is a schematic for the circuit we used. I couldn't find an audio jack representation in Circuit Lab so I just used a voltage source and a speaker as substitutes.
Here is my data for the experiment. As you can see, the voltage drops created by running audio through the circuit were fairly negligible, and there isn't a definitive pattern apparent in these results. I know there is a drop in voltage occurring as the audio is passed through the circuit, just because of the resistance present, and this drop is shown in most of the frequencies.
When I ran pink noise through the circuit, the signal was much quieter, and the low end was basically non-existent when compared to the unaltered signal. The same was true with white noise, though the higher frequencies were louder than pink noise, but that's due to the more evenly weighted nature of pink noise.
Final Project
I'm fairly certain I want to do something with the Reso-Drum, which seems fairly inexpensive to produce. The most expensive parts are the electromechanical transducers, which are about $20 each. However, since the tutorial I found uses a max patch as the sound source, I need to figure out some way to create a signal source that isn't so reliant on the computer. I might make my own max patch or something like that, but since this is analog electronics class, I assume I should try to make an oscillator type device as well.
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