Sound pressure level spectrogram (plot_VS_SPL_spectrogram)

Post-processing documentation
Matlab commandplot_VS_SPL_spectrogram
Module VS.pp
Description PLOT_VS_SPL_SPECTROGRAM draws the acoustic noise sound pressure level spectrogram at 1m (variable speed SPL spectrum)
Parameters
Restrictions
See also plot_VS_ASWL_spectrogram, plot_VS_ASPL_overall, plot_ASPL_fft

Result

This MANATEE software post processing draws the acoustic noise spectrogram in term of sound pressure level. It gives the following graph on default simulation project:

Sound pressure level spectrogram at 1 m
Sound pressure level spectrogram at 1 m
plot_VS_SPL_spectrogram

One can see in this example that a strong resonance occurs due to coincidence between a magnetic force excitation of wavenumber r=2 with the ovalization mode of the stator stack (2,0).

Note that you can change some plot options of all default MANATEE post processings (e.g. axis limits, colormaps).

This graph help identifying the acoustic noise resonances occuring during variable speed operation of electrical machines.

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