Something is hidden in the bathroom air duct

He gave me no further information at that time

During the last few weeks, I’ve heard a different sound in the air duct above my bathroom. At first, the noise was faint plus subtle. I only heard the different sound in the middle of the evening, yesterday, I started hearing the different faint sounds while in the day as well. My fiance has been out of town on contractor for the past 3 weeks, so I can’t have him check on the problem. I wasn’t going to pay a contractor to come out plus look at the air duct, although I was afraid that an pet was stuck in the attic, but one of my coworkers got me distraught when they told me that an exterminator found a litter of kittens in his attic air duct. I doubt it highly that the problem was a litter of kittens or puppies, but the noise wasn’t going away. I contacted the Heating and A/C contractor first, plus they gave me an appointment for the next day. On Sunday, the Heating and A/C contractor came over to check on the problem. He removed the wall board from our attic entrance plus carefully climbed into the ceiling. He was gone for 20 or 30 minutes, before I saw his face again. He came down the stairs plus grabbed some additional tools. He gave me no further information at that time. He was gone in the attic for another thirty minutes, but when he finally came back, he was carrying more than one small pieces of sheet metal. The Heating and A/C contractor told me that the ducting metal was loose, plus it was rubbing together every time the Heating and A/C unit was on. That was the source of my different sound.
Air conditioning technician