Answer: earbuds/Headsets
Step-by-step explanation:
Okay, let us fill in the gap in the question above;
" EARBUD was enacted primarily to address driver distraction and driver error caused by being unable to hear the environment outside the vehicle due to the use of sound-delivering devices".
Although, mobile phones are great, but they are also dangerous Because of divided attention when operating it and driving simultaneously, Many road accidents has being caused by its distractions.
In order to solve this problem of distractions, in some states it is legal to use earbuds in one of the ears, and never both ears. As a driver, if you but on earbuds in both ears you may not be able to hear sirens or any other things that signifies danger while driving which might cause road accident.
Some headsets are meant and designed improve drivers' hearing ability or for community purpose. This kind of headsets are permitted in Alaska.