# PARAM, SPLFAC

Bulk Data Entry Specifies the scale factor (q) used to calculate the Sound Pressure Level in Radiated Sound Analysis.

Parameter Values Description
SPLFAC < Real > 0.0 >

Default = 1.0

This parameter specifies the scale factor (q) used to calculate the Sound Pressure Level in Radiated Sound Analysis. The equation used for the calculation is:

Sound Pressure

Total Complex Acoustic Sound Pressure requested by SPL is:

${p}_{\mathit{total}}\left(f\right)=\sum _{j=1}^{\mathit{np}}\left(\frac{f\rho q}{{r}_{j}}{\left[{V}_{\mathit{flux}}\left(f\right)\right]}_{j}{\text{ie}}^{-\text{i}k{r}_{j}}\right)$

Where,
$f$
Frequency of the sound wave in the medium.
$\rho$
Density of the acoustic medium defined by PARAM, SPLRHO.
${r}_{j}$
Distance from the acoustic source grid $j$ on the panel to the microphone location grid.
${\left[{V}_{\mathit{flux}}\left(f\right)\right]}_{j}$
Velocity flux of the source grid $j$ .
$k$
Wave number as defined in Wave Number.
$i$
Square root of -1.
$\mathrm{np}$
Number of source grids.
$q$
Value of the scale factor specified using the parameter PARAM, SPLFAC.