The word is also a common adjective for things that are ghostly or immaterial. Spectral Content - an overview | ScienceDirect Topics
In medicine, spectral features are used to analyze brain waves (EEG) for tasks like sleep staging. 2. Film and Fiction (The Ghostly)
In technical contexts, "spectral" refers to the distribution of a signal's properties, like energy or power, across different frequencies.
This is the distribution of power over a frequency range, often described using Power Spectral Density (PSD) . It helps engineers see where the "strength" of a signal lies. Light and Imaging:
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