Conceptualized, designed, built and tested product based on Fourier analysis concepts to obtain high
frequency sine waves from digital square wave oscillators, resulting in less expensive / more compact product.
Working with sound, he creates reactive environments with sensors and audio controllers that use both low and high
frequency sine waves and vibration generators to physically affect people and spaces.
Not exact matches
By scrutinizing its shape just before the final cataclysm, the scientists found that it closely approximated a simple
sine wave with a steadily increasing
frequency and amplitude.
I found that F3 (HadCRUT3) could be fitted accurately with
sine waves of
frequency nf for n = 1 to 5, each involving 2 coefficients (amplitude and time - shift), plus one more for
frequency f (= 1 / ToothW) for a total of 11 coefficients.
David Springer:, Rossander's configuration generates the rising side of a
sine wave with a
frequency of 200 some years.
It is the sum of two
sine wave where the difference in
frequency is the ratio 1:1.618...
Morever, Rossander's configuration generates the rising side of a
sine wave with a
frequency of 200 some years.
Girma for a bit of fun I reconstructed the hadcrut3V global tempreature series from
sine waves of different
frequencies amplitudes and phases (I think it is pretty good fit over 1850 to 2010 — and beyond!).
Viewed in the
frequency domain a
sine wave has a constant
frequency, leading one to describe it as in equilibrium.
Fourier based spectral analysis will yield of
sine waves of different
frequencies — but it is an illusion.
So if we have a
sine wave of
frequency X then in order to digitally determine X we need to sample the signal at 2X.
The best you can do with any series probably is to limit what you do claim as a «trend» is that it is bounded by a single
sine wave over the series as a lower
frequency limit if you are going to be «accurate»..