Spectral Instant

The word is also a common adjective for things that are ghostly or immaterial. Spectral Content - an overview | ScienceDirect Topics

In technical contexts, "spectral" refers to the distribution of a signal's properties, like energy or power, across different frequencies. Spectral

In medicine, spectral features are used to analyze brain waves (EEG) for tasks like sleep staging. 2. Film and Fiction (The Ghostly) The word is also a common adjective for