Excessive road noise has plagued most Honda vehicles for many years. I have owned Accords from 1993, 1998, 2002, 2004, 2008, 2010, and 2018. All had too much road noise. Until the newest one, I was driving big miles, 40-50,000 miles annually so lots of replacement tires as well. It seemed like no amount of tire research on my part regard fixed the problem. At the same time, every generation of Accord, especially the 2018, was billed as being much quieter than the previous generation Not in my experience. I have test driven a few Acura’s, all were quiet cars. So I guess Honda does know how to build them. Honda is not alone with this issue. Apparently, Nissan and Mazda are no better. Toyota, GM, and VW make quieter cars. For me, though, the positive features of an Accord still win out.
I seen comments regarding suspension grommets, body mounts, acoustic glass, better sound deadeners, etc. I have not heard of the tie down hole idea; might have some merit. I am not an engineer, so the problem needs to be addressed by others.