I hear Beeping noise

i lost my AirPods just before I bought a iPhone Xs max and I know they are in my room somewhere as I used them with my iPad and iMac. In Find my IPhone they were last in my house. I do hear a beep noise once a day from my room. It is not from any iOS device as it comes from under my bed, is this possibly my AirPods beeping? yes, I have a very full and messy under bed storage.

Thanks