I have Subaru Oem aero-bars and J racks (made by Thule). No problems with sound. Worked fine until I bought a second Kayak that that weighed 75 Lbs and was 13 ft long. It was too hard to load by myself, so I have since added a Torklift EcoHitch and carry the kayaks on a 4x8 trailer.
2016 Pure Red Crosstrek 2.0i Premium
CVT w/6-Speed Manual Mode
Aero crossbars, Kayak carrier, Bike carrier