diggy_dude
Now 169% diggier!
I've noticed and have told friends that if they are going to be mixing, or running sound to NOT drive to where your going with the window down. It has an unbelievable affect on your ears.
The swish sound of the air flow can be as bad as listening to your car radio on 11 on that whole drive.
Bob Katz said something similar about traveling to a mastering gig. If you drive or fly a long way, allow time for a full night's sleep when you get there before doing the job.