Quote:
Originally Posted by Vervain
Could you elaborate on this? It sounds interesting to try, but I don't quite understand how you use this method.
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It is mostly for engineers, but I can describe briefly the steps involved:
1. Record a sound file inboard the car of the acceleration, making a sharp sound when you drop the clutch, such as a short shout. Use this sound to crop the file to start at the 0.0 point.
2. Use Fourier transformation on the sound file to extract the frequencies.
3. Use pattern recognition to find the engine frequency. It is usually quite dominating and continous through the file.
4. Using the number of cylinders and the fact that it is a four stroke engine to compute the RPM from the frequency.
5. Use the dynamic tyre diameter and gear ratios to compute the RPM into speed.
6. Find the point in the file where the speed exceeds 100 km/h.
I used home made software for the entire process.