Look up my sound deadening thread. There’s about 100 things in each door that vibrate, rattle, buzz or just generally makes useless noises because of the way the door panels are built. The biggest offender is the lock rod where it comes through the top of the door and it’s trim piece. CLD, butyl rope and Tessa tape along with a few hours of your time can fix it.
Mine don’t make a single sound now…and I run an 8” midbass in the doors with a ton of power. I actually had to remove the outer door cladding and deaden that too it was buzzing so bad.