In NASCAR, drivers do not listen to music while they drive. The sport of NASCAR is one that requires the absolute focus of every driver involved in a race. Besides the fact that all of the drivers are trying to do the best that they can and finish the race in the best possible position, there is also a built in honor code and responsibility that each driver has to ensure the safety and integrity of the sport and every driver involved. All of the drivers are being put in the safest position possible by their respective teams and NASCAR as possible prior to each race, however, when driving a car at such high speeds, there are many dangerous risk factors associated with the sport which means each participant must be as careful as possible not to endanger themselves or any other driver that is competing. NASCAR race cars can top out at a speed of up to 321kmh or 200 mph, so the drivers need to make sure that they are as focused as possible on the race and their specific strategies at all times with no distractions involved.
One of the biggest issues involved with listening to music during a race has to do with the fact that the music essentially cannot be heard while the car is operating at full capacity and speed. NASCAR race cars can be incredibly loud and NASCAR races in general are considered to be one of the louder sporting events in the entire world. NASCAR races can generate so much noise that they could be compared to a jet flyover at 1000 feet. Therefore, with so much noise going on during the race and at track level throughout the race, it would be very difficult for any driver to actually hear the music that they would be listening to through the race.
Another factor that would play into the tough logistics of listening to music during a race would be the fact that many of the drivers are constantly communicating with their crew chiefs and their teams to make sure that they have a good understanding of what is happening throughout the race and coming up with strategies on the fly of the best moves possible to make during the race. A driver would never want to jeopardize a chance to communicate with the team in the hopes of advancing in the race, only for that communication to somehow be hindered by music.
NASCAR drivers are locked into a different kind of zone once a race starts. NASCAR drivers are some of the greatest drivers in the world, and no athlete at the top of their game would ever want to be distracted while competing at the highest level and doing the thing that they love. This is no different from all NASCAR drivers. With the potential of music playing while a driver is racing, it can be a significant hindrance to the drivers and what they want to accomplish throughout the race.
NASCAR driver Martin Truex Jr. was asked about listening to music during races and felt it was too difficult for him to hear, and that it made him feel "disconnected from the car." This is one of the biggest issues regarding listening to music during races. NASCAR races can take a very long time and require complete and utter focus throughout the entire race. It is incredibly important for all of the drivers competing in the race to make sure that they feel as though they are connected with the car and the track at all times during the race.
NASCAR is a sport that requires very few to no mistakes if a driver wants to win a race due to the skill level and drive of most of the drivers. Even the smallest slip-up or lack in concentration could cost drivers a race and can influence the amount of money the driver and the team make. Therefore, there is simply too much risk and not enough reward for NASCAR drivers to be listening to music during a race. Although listening during practice laps or in the garage may be acceptable to uplift mood or to have some fun with the team, race day is a completely different story. NASCAR drivers are dedicated to their craft, and would never want an outside factor like music to influence how they do in competitive race in any way shape or form.