Yeah, like John and Deejay said, female frogs do make minor noises. It sort of sounds like a squeak. I had two female Wood frogs together in a tank once and one grabbed on to the other (as a male would grab on to female to mate). They obviously weren’t’ trying to mate, but –as I came to learn—that female was trying to dominate over the other female; it was a territorial thing. Surprisingly, female Wood frogs are territorial, while the males aren't! Anyways, the female that was being attacked released several high pitched squeaks, nothing of which sounded like a male.