Chirping / squealing ?

[kgjersda]

While driving my last trip I noticed an intermittent chirping / squealing at around 45mph. It's not connected to the engine revs but it seems to be speed dependent. I can't hear it above 55 and not under 35(ish). It's hard to pinpoint the sound as there's so much wind noise. But it does seem to come from the front/beneath me.


Has anyone else had this sound? Wheel bearings? Brakes? I'm not sure, I can't find any noise when turning the wheels by hand at standstill.