May be a stupid question...

My boyfriend and I are going to the drag strip today because they are having a diesel themed show as well as tractor pulls. I am so excited to go and get out of the house as I never have weekends off with my job. But this morning I realized how loud it will be and have been a little worried about whether it will hurt the babies ears or not. I stopped going to the gun range around 24 weeks when my OB said that the ears would be able to hear outside of my womb.... So should I be concerned about the noise level of all the trucks or am I just being a worrisome FTM??