LiveCycle Message Box Beep

Is it possible to change or mute the default ("4") host message box beep in LiveCycle?  I can change the beep type using xfa.host.app.beep() however the message box triggers the default beep ("4") then the app beep I specify will trigger.  The same default beep ("4") triggers regardless which type of messagebox I select.  e.g.

0 (Error), 1 (Warning), 2 (Question), 3 (Status), and 4 (Default).

Thanks.