Today's lecture saw us analysing last weeks mock test. We went over each answer to each question with our lecturer explaining why each answer was either correct or incorrect in regards to the appropriate question. We have been made aware that next week is the proper test.
Lab:
During the lab session we were to take the highest and lowest points of the waves in the sound files from last week, and use these files to find the decibel ratio's in each. I was trying to use the formula's for voltage and such, thinking these were the ones we were meant to use. I spent ages trying to find the appropriate values for the files that were to be used. A lab lecturer tried showing me wiki to explain these, although this was not what I needed. I knew what the values meant, I just needed help to find where these values/properties were located. I am grateful for his help all the same.
My lecturer then came over and said I was using the wrong values and looking at something I really didn't need to be looking at. I was to just be doing a basic calculation using the log and inverse log functions along with the found minimum's and maximum's from the sound waves (See figure 1). This made things a lot easier and I now understand what was being asked of me and how to do it. Hopefully this will make future classes much easier.
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| Figure 1 - Sound Level and the Decibel |
Next week:
Class test (proper).
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