MOUS_ICO Menu: Noise > Hard ground regions > Active
or
MOUS_ICO Menu: Noise > Hard ground regions > Dialog box…MOUS_ICO Select one or several hard ground regions in the listMOUS_ICO Dialog box: Active…
nco: Select a hard ground regionMOUS_ICO Popup menu: Active
Sets the selected hard ground regions active. Only active hard ground regions are included in noise calculations.