Do you have an idea how old the hose bib is?

Sometimes older valves can vibrate in the stem as the water goes past the washer. The sound telegraphs through the plumbing.

Tightening the packing nut on those older faucets would usually solve the problem.

A loose screw holding the faucet washer can cause such noise.

Thanks! I will try to tighten everything!

How are you going to remember to turn off the water when watering the lawn?

I put a timer on mine.