Hi Cara, that’s great you’ve found mimicking has helped you. I’ve found that helpful with eating as well, using that sound/action on myself to drown out the other.
The only trouble I’ve found is that it can lead to some slightly awkward/comedy moments if someone notices that you’re mirroring them, which is why I don’t tend to use it as much myself. One potential workaround might be to make a different noise yourself – one that distracts and drowns at the sounds of the trigger.