If your gas meter is making a strange noise, usually a chirping noise or high-pitched squeaking, it's likely caused by friction between moving parts in your system that may be rubbing together. Like any machine, parts succumb to wear and get out of adjustment. You should contact the utility company right away to assess the situation and determine the best way forward. If you hear a whistling or hissing, that's the sound of gas escaping the pipes or meter. That's why your gas company adds a smelly chemical to the gas so you can identify gas leaks easily.