acceleration power spectral density
frequency-time spectral density function
four-dimensional spectral density
Evolutionary Spectral Density
energy spectral density
cyclic spectral density function
cyclic spectral density
cross-power spectral density
compensated spectral density log
Average spectral density function
auto-power spectral density function
auto-power spectral density
ARMA spectral density estimation
acceleration spectral density
1 D energy spectral density function