Has anyone else noticed this strange phenomena.... or is it just me ?

Close both front windows and sunroof. Lower both rear windows to approx 3 inches. At speeds of 35 mph upwards it sounds like you are flying a Chinook helicopter mission !!! (How cool is that)

I guess it is to do with differing air pressures internally and externally, no doubt someone will know what causes it. It is fun though... but not for long periods, as the sound eventually scrambles your brain.

I think this is actually covered in your handbook if Im right. Happens with most cars. I'm not Fat. RRS TDV6 HST.

I noticed that too. I got paranoid about driving with the rear windows down incase it took the back one out with the air pressure.

Happened in my M3 and also in my Focus, in different window configurations for each car

Annoys the crap outta me  2014.5 SDV6 AB Dynamic ... Fuji /Santorini Pan roof and 22's
2013 Porsche Boxster S 3.4
2014 Audi A3 S line Quattro
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Yup.

It´s covered on page 17 in the "quick start" section of the handbook.

"if a resonance/booming sound occurs with only the rear windows open,
lowering an adjacent front window about 25mm (1 inch) will
eliminate the condition.
This will change the frequency of the air volume moving in/out of the vehicle
and thus lessen or remove the booming sound"

Rgds

Uffe As a rule, I always resist temptations,
unless they are irresistible.
My Ride: 2006 RRS HSE TVD6 Java Black/Cherry Woods with HST factoryfitted pack.

Happened with my Merc E320 too 07,TDV8,Black, Black Heated leather all round, Rear Entertainment with Headpones & Remote, TV, DVD, Pure Dab Digital Radio, Sidesteps, Adaptive Headlights, sunroof, now working fuel burning heater )))