macro to prevent trinket use error sounds

[Ynir]

Some trinkets make a noise when activated when their use is on cooldown.

I combine trinket activation with Shield Block and Shield Slam:

#showtooltip Shield Slam
/script UIErrorsFrame:Hide()
/cast Shield Block
/use Repelling Charge
/use 14
/script UIErrorsFrame:Clear()
/script UIErrorsFrame:Show()
/cast Shield Slam
/startattack

The fourth line causes a noise when the trinket is on cooldown. The function to prevent the noise is related to the UIErrorsFrame set of calls that prevent error message spams in midscreen.

I once saw a sound suppression call in a macro but can't find the example again. Does anyone know the call, or where I can go for more info?