Hi ammar welcome to the forum
certain EGPWS warning are inhibited if you're above certain Radio altitudes or I wouldn't say inhibited so much as altered to another format.
one example would be:
mode 2 if you're above 798 ft it would trigger an oral warning saying PULL UP.
if you're bellow this radio height it would trigger a more nuisant oral warning repeating TERRAIN TERRAIN PULL UP and the frequency of it increases as you come closer to the ground.
Check the EGPWS modes and warnings and you'll come up with a couple of other stereotypes.
You may have to wait untill you get a more professional answer from some of our experienced buddies.
Good luck