Should be a track that the carriage rolls through on the real, the whole bottom of it, also the cover can get loose screws causing the plastic to vibrate

If it is a genie screw drive opener then a low temp grease would be better on it to quiet it down

Basically what others said but another issue could be that the door shakes the track just enough to mess up the eyes for a second or the wire that connects the eyes to the opener itself are barely holding on

Another department is already on the case