I am doing this project, concerned with fourier analysis, and there is a question i can't answer. Basicly I have to plot the power spectral density versus frequency, and they say that i only need to plot frequencies up to 200 Hz, since frequencies above that are meaningless.
2007-11-10 17:47:57 · 4 answers · asked by Val 4 in Science & Mathematics ➔ Engineering
oh the question was why are frequencies above 200 Hz meaningless? :)
2007-11-10 18:49:01 · update #1
When doing a Fourier analysis on a frequency, the multiples (harmonics) that comprise that frequency decrease in amplitude as their frequency increases. In your application, the amplitudes (and therefore the power) of the frequency components above 200 Hz must be insignificant.
2007-11-10 20:47:58 · answer #1 · answered by Jim P 3 · 0⤊ 0⤋
It depends on your problem.
It is only a guess, but maybe the output is from a low-pass filter with a cut-off freq. at 200 Hz?
Without the full question it is hard to tell.
2007-11-10 19:13:40 · answer #2 · answered by TV guy 7 · 0⤊ 0⤋
"gentle aspects" have differing spectral traces b/c of the quantity of capability each and each very own and is seen interior the style of wavelengths, and is measured by way of E=hv E- capability h- Planck's consistent v-wavelength right here're some hyperlinks that gives you you greater information. desire this enables.
2016-12-16 04:59:07 · answer #3 · answered by ? 4 · 0⤊ 0⤋
yes
2007-11-10 18:34:37 · answer #4 · answered by frank 5 · 0⤊ 0⤋