No. It may cause middle ear barotrauma if you have ET dysfunction already. If you have no issues equilibrating air pressure there is not going to be any problems.
You dropped a piece of plastic on the floor from what 2 feet high? It couldn't possible have been more than 70 db.
As many others have pointed our, tinnitus is likely not the main problem here.
Their compound tries to stop damage in the inner ear as it is still occuring weeks after the incident. This helps hearing function recover and lessens the symptons.
AM-101 is not thought to have any effect at the CNS level, thus chronic tinnitus, which is thought to occur at this level, is...
Yeah well there isn't much you can do. You can take steroids IMMEDIATELY after a hearing incident and it seems to be a hit or miss. Then there is AM-101 which is still in the clinical trial stage. You can be proactive all you want but those are realistically your only medical options.