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If frequencies above the Nyquist Frequency are not filtered out, energy in these will appear as spectral artefacts below the Nyquist Frequency. Optical and electronic anti aliasing can be used to prevent this. Sometimes the higher frequencies are said to be “folded” back so the term “folding” is used.

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Industri / Domain: Bahan-bahan kimia
Kategori: Spektroskopi
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