What kind of sound deadening did you do to the top? I've been trying to figure out where the wind noise is from and what can help. It seems like if I out some kind of insulation along side between the roof and roll bars that I might have the best results, based on some testing. I already have the sound deadening package and roof liner. For me, the most prominent noise is wind. I don't have any whistling or I'll-fitting door windows, just general higher-volume sound.I totally disagree. Interior sound level is absolutely quantifiable. It also matters what what bronco trim level you have and what roads you drive on have an impact.
I have a 2.3L BaseSquatch which means that I have the least about of sound deadening from the factory, the loudest tires and the 2.3 seams to make more of a racket than the 2.7. Furthermore, the predominate highway surface here in SoCal is grooved concrete.
These all combine to give me a 75 DB interior noise level at 65 mph which is absolutely stupid loud for a modern vehicle. I have added a crap ton of sound deadening to the rear and doors which has dropped the interior sound level to 66 dB at 65 mph and 68 dB at 75 mph. I still need to do the front floor, transmission tunnel, and firewall. These changes are making it much more livable and you can now have a conversation at highway speeds.
To bring this point back home…. interior level is not at all subjective and completely quantifiable.
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