I am not sure if a bear will come out to a call or not. My guess would be yes an ocassional bear would come out to one. I know when moose calling bears have come out on ocassion and sit in the road and look at you. But
have never tried to call one out intentionaly so I would guess that one would. I am not sure about the hooting as they could be warning each other as a cub may be around.