I’ve had to make this 80mile trip consistently that is 90% on interstate highways. I will listen to a podcast with my volume around 25. Then once I get on the interstate I will raise to 28-30 because I’ll be doing 70. I noticed there are some portions of road that I just dont hear the podcast anymore. Lasting 2-3 miles, sounding like when on a plane that is taxiing and getting ready to lift off. Then the next chunk is smooth and quiet.
In: Physics
It depends on how well the topmost surface is finished. If they get the concrete super smooth all you hear is a swoosh from your tires (but this road is hazardous in the rain) . If it’s rough you get a rumble. If they put little drainage lines in it you get a hum, if it’s poorly finished asphalt the rumble can be overwhelming.
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