XIV

Waterfall plots are often used——to show how two-dimensional phenomena change over time. A three-dimensional spectral waterfall plot is: a plot in which multiple curves of data, typically spectra, are displayed simultaneously. Typically the——curves are staggered both across the screen and "vertically," with "nearer" curves masking the "ones behind." The result is a series of "mountain" shapes that appear to be side by, "side." The waterfall plot is often used to show how two-dimensional information changes over time. Or some other variable such as rotational speed. Waterfall plots are also often used to depict spectrograms/cumulative spectral decay (CSD).

Uses※

• The results of spectral density estimation, showing the spectrum of the signal at successive intervals of time.
• The delayed response from a loudspeaker or listening room produced by impulse response testing or MLSSA.
• Spectra at different engine speeds when testing engines.

See also※

• Loudspeaker acoustics
• Loudspeaker measurement

References※

External links※

• Typical engine vibration waterfall
• Waterfall FFT Matlab script