We have a 2006 crv and we can't silence the alarm even with the engine running. I'm wanting to know where the alarm sounder is or if there is a fuse that can be removed to shut the thing up. 

I would check the door switches first as if any of them are faulty then this could be the reason for the alarm sounding.

Open each door in turn and see if the interior light comes on and goes off (including the tailgate) if you find one that doesn't behave as it should then that may be the cause.

Also try a battery reset to see if that silences the alarm