There could be a million business reasons other than the vehicle itself that they switched vehicles/sponsors. But sound is less critical when deer are acustomed to it. I have actually seem sound increase deer movement when it becomes routine. The area we hunt is heavily wooded with train Tracks and gravel roads. When either a train or a school bus would go by tbe deer would come out from everywhere.
John Dudley asked lee about movement and noise ect before amd during hunting season Lee told John that he drives through his property as often as possible meaning every day if he can on the side by side just to get the deer accustomed to it
