This is just the main Bass line, I did not tab through the chorus.
The part is rather catchy and you should be able to get the rhythm fairly easily by 
to the song.


G|-----------------------------------------|
D|-----------------------------------------|
A|------------3----3-------------3-5----5--|
E|---5--3-5------5-------7--5-7-------5----|


This starts when Sam (singer) gets to

 "...And never hear, these hissing voices..."

This repeats until the chorus and then starts again after.
I think that this is pretty accurate, although a very rough version.