Videomaker – Learn video production and editing, camera reviews › Forums › Technique › Sound › Sony pj710v hiss
Keep an eye on your gain. If it's turned up too high, you'll get that hiss. If you can't get around increasing the gain, you might want to try using a preamp between your mic and your camera.
Unfortunatly the sony camera has no audio control except normal and low setting.
I'll be that's the problem then. The camera is likely adding a layer of auto-adjusted gain.
Is the mic self powered? That is, does it require a battery?
Yes all the microphones that I listed above were powered with selfbattery.