Videomaker – Learn video production and editing, camera reviews › Forums › Cameras and Camcorders › Other Camcorders › humming noise with Sony camcorders › All camcorders make a humm
All camcorders make a humming sound in the Record, Paused or Standby modes. Probably when it is in the Playback mode, it is not Paused? If it is Stopped then the head motor is not spinning with the tape wrapped around it. In those other modes the tape is wrapped around a spinning head drum and humming is what you will hear.
If it is not loud enough for the microphone to pick it up and record it I would suggest that you get ear plugs if it bothers you that much?
Until they develop recorders with no moving parts you will have some humming when they are running.