Tom, our rig has a round alarm underneath the steering wheel that can be adjusted to emit less noise. You just turn it to bring down the horrific noise to a slightly irritating noise. Still there, but I don’t think ours can be heard much outside anymore. I discovered this when a jack sensor went out on me. Jack was stowed, but the rig thought it wasn’t, and it really, really wanted me to know that! The repair shop was an hour away, and I would have gone mad at the original volume. Maybe yours can be adjusted to be annoying without being ear splitting.
And to anyone who says get rid of it, it is a mandatory safety feature. Mine is on whenever the air brakes don’t have enough pressure or the jacks aren’t stowed.