When he is not Bruce Wayne, the batman has said in such a low hoarse tone to throw people off regarding his original identity. Each and every iteration of Batman had its own distinct version of the voice. It has been found that Robert Pattinson is the one who has worked on his own iteration of the voice but has fallen so flat. In the middle of the shoot he completely forgot how a batman sounds. READ MORE - https://www.activenoon.com/i-forgot-to-speak-like-batman-while-shooting-says-robert-pattinson/2181/