Spectralpowerreferstothedistributionofpowerorenergyacrossdifferentfrequencieswithinasignal.Itisakeyconceptinsignalprocessingandanalysis,providinginsightsintothefrequencycomponentsthatmakeupasignal.Powerspectraldensity(PSD)isacommonmethodtoquantifyspectralpower,representinghowthepowerofasignalisdistributedoverfrequency.Thisisusefulinvariousfields,suchasaudioprocessing,vibrationanalysis,telecommunications,andbiomedicalsignalanalysis(e.g.,EEGorECGsignals).Byanalyzingspectralpower,researchersandengineerscanidentifydominantfrequencies,detectanomalies,filternoise,andoptimizesystemperformance.ItisoftencomputedusingtechniquesliketheFastFourierTransform(FFT)orwavelettransforms.Insummary,spectralpowerhelpscharacterizesignalsinthefrequencydomain,enablingdeeperunderstandingandmanipulationofcomplexwaveforms.
