In general
-
In terms of turbo vs. non-turbo sounds, which do you like better?
-
In terms of 4-stroke vs. 2-stroke
-
Which combination of the above do you like the best?
-
In general, which diesel sounds do you like best: EMD; alco, BW, GE etc…
Specific:
-
Which diesel model of any manufacturer do you like to listen best?
-
Which horn that is used on diesels do you like best? And on which model do you most often hear it?