# PARAM, ERPC

Bulk Data Entry The speed of sound used in the ERP calculation.

Parameter Values Description
ERPC Real > 0.0

Default = 1.0

The speed of sound used in the ERP calculation:
$\mathit{ERP}=\mathit{ERPRLF}*\left(\frac{1}{2}\mathit{ERPC}*\mathit{ERPRHO}\right)\sum _{i}^{\mathit{ngrid}}{A}_{i}*{\nu }_{i}^{2}$