Gofer doesn't sound like a white-knuckle passenger, just someone interested enough to ask a question.
The question seems to have been partially answered but would a sudden slew due to wake turbulence provoke something sounding like a "solid bang" on a 319?
I'm just thinking of the fairly horrendous sounds generated by an airframe in heavy turbulence, many of which could be described as solid bangs. Since they're continuous one associates them directly with the turbulence but a single "whack" in an otherwise smooth flight might, in isolation, seem more ominous.