I’m still quite skeptical, but I suppose it’s possible that you actually enter these cars into sound competitions? Are your cars ridiculously customised bass machines?
If not, then I have to wonder how exactly did you measure the sound levels, because what you’re saying here is that your car is capable of Guinness world record breaking levels.
Here’s an example of 159dB:
Does your 158dB car do this?
According to this article:
After looking through various sources, I find that they all say pretty much the same thing - sound at these kind of levels is extremely damaging.
It doesn’t really matter what frequencies we can or can’t hear, the damaging thing is the huge pressure waves smashing into your ear drums.