Freesound Forums

I need continuous knocking sound (that will be hearable as)from the inside of cardboard box for an animation.

I've given this an attempt, which you can (hopefully) preview here:
http://www.freesound.org/tickets/62b8973679594b63b951d514d8855de9/

Once it has been moderated, and if that's what you're after, the sound will become available here for download:
http://www.freesound.org/people/InspectorJ/sounds/375982/