Noise coming from drivers side front tyre.

My 2013 Audi Q5 has recently developed a lowed whirring noise coming from the drivers side front tyre when on harsh roads and when travelling at over 70mph. I have taken the car into Audi and have been advised that there is nothing mechanically Wrong with the wheel bearing, suspension, brakes or callipers any of the obvious things. They advised it could just be a tyre issue. After being advised I changed the tyre for a decent make (Michelin excellence). However this has not got rid of the noise. I took it back to the garage and they said they were stumped. I am now at my wits end as I drive on the motorway daily for work and it’s driving me mad. Has any one also had this issue?.Please some one help!!!.