I don't have all the lenses needed for a full test, so if anyone has the STM 18-135mm.

For my tests I have an external shotgun mic on camera.
All shots are 50mm and f/5.6

By far, the winner is the Canon 18-55mm f/3.5-5.6 STM IS kit lens. Even the Canon STM 55-250mm was noisy as heck.

Lens/glass vibration is an issue with some lenses, especially when zoomed out to 135mm on the 28-135mm...

70D lens tests on Vimeo