Yes, you can.  When performing speech audiometry, you can mask the contralateral ear with headphones.  To do so, press the right mouse button on the speaker or headphones icon.

Then click on the masking icon to open the masking window.  Use the buttons to change the masker type, masker conduction and masker level.

 



This feature is not available in the webviewer.  
Audiqueen's webviewer displays the results entered in Audiqueen's Workstations.