Driving on the highway, at speed, will put out at least 75 dBs.

80 is generally the line drawn when you’re causing hearing damage in humans. If you’re blasting out the sound to go over the sound of the vehicle, you are causing other issues.

Edit:

I probably should’ve re-linked the article I posted earlier in the branch, and thrown in a quote with one of the example findings:

This would require signal strength of greater than 289 dB just for the animal to hear the sound.