Howtosignalprocessing
- What is the power in a power spectrum?
- How do you calculate power spectrum?
- Why is RMS amplitude useful?
What is the power in a power spectrum?
The power spectrum of a signal indicates the relative magnitudes of the frequency components that combine to make up the signal. The data used to determine the power spectrum must reflect sufficient excitation in the signal.
How do you calculate power spectrum?
Power spectrum (PS) of biological time series (of an electroencephalogram recording, for instance) often shows a relationship of decreasing power as a function of frequency (f) according to the general equation: PS(f) = ψ × f-α (Norena et al., 2010).
Why is RMS amplitude useful?
The RMS amplitude format is valuable because it indicates the equivalent steady state energy value of an oscillating signal. For example, a sine wave (like a pressure wave) oscillates above and below zero Pascal. The average value of the wave is zero.
