Toppy, that makes sense, and yes, I always ride about with foam earplugs scrunched -up and jammed into my ears before any outing. Has anyone tried newer noise cancelling technology earplugs where there is a micro-delay that picks up the offending noise , processes that ultra-fast, then delivers silence to brain ? Studying relationships of noise to stress levels too,seems those who deal with noise can arrive fresher than those who tough it out.