My webcam mic is not longer recognized (but the camera is)

I have used a Logitec C920 webcam with built-in mic since 2020 connected to my Apple MacBook Air (2023) running the most recent version of Mac OS. Since last week, the Logitec camera connects just fine, but the mic is no longer recognized as an audio input. (My my iPhone is recognized along with the mic built into the MacBook.) Has anyone else had this problem? Any solutions?