Owning an RV can be considered a bigger responsibility than owning a normal car. Unlike a car, RVs can be used as a portable home on the road and features many things that a car doesn't have. Bathrooms, water faucets, electricity, etc. So if you begin to hear a pulsing sound coming from your propane regulator, then you may have a problem.
In this tutorial, the RV Doctor explains what might be going on and what you'll need to do to prevent any possible damage from continuing. Good luck, be safe, and enjoy!