Statistic and graphic characterization of .WAV file noise data from the generator page and characterization page.
Magnitude vs. Frequency, averaged over 409 FFT blocks of 1024 values each.
The vertical red line near the center is 10 kHz; the vertical green line at the right is 20 kHz, and the vertical red line at the far left is 100 Hz.
The horizontal light gray line is the average from
1 kHz to 20 kHz; the horizontal green lines above and
below the mean represent
Also see FFT Graph in the noise glossary.
Autocorrelation vs. Offset, averaged over 409 FFT blocks of 1024 values each.
The horizontal light gray line is zero. The 512 horizontal columns represent rotation positions. The spike at zero is normalized to 4096 which plots as 255.
Also see Autocorrelation Graph in the noise glossary.
Distribution of Data Values, around the mean and through 4 standard deviations on each side.
The vertical light gray line is the mean; the vertical green lines are standard deviations; and the red line is the ideal normal distribution.
Also see Normal Graph in the noise glossary.
Terry Ritter, his current address, and his top page.
Last updated: 1999-06-21