Cannot hear wav file despite seeing the wave form

It seems that my .wav file has become corrupt since I have a voice recorded .wav form which shows up in adobe audition! See the wave form put when play - silence . I copy the wave form and paste it and there is nothing . File explorer states that the file is large  ( there is something there ) - What has Audition done - it s 12min of audio recorded and now I have loost it !!???help