It's true that the canvas top lets in more noise and causes quite a bit of turbulence in the interior when you are cruising down the highway. (articles.orlandosentinel.com)
I haven't heard of turbulence training — I'll have to look into it! (pumpsandiron.com)
Principals and superintendents intent on radically improving schools and systems need to accept and be prepared for a good bit of turbulence. (ascd.org)