We present a computational aeroacoustics method to evaluate sound generated by low Mach number flows in complex configurations in which turbulence interacts with arbitrarily shaped solid objects. This hybrid approach is based on Lighthill’s acoustic analogy in conjunction with sound source information from an incompressible calculation. In this method, Lighthill’s equation is solved using a boundary element method that allows the effect of scattered sound from arbitrarily shaped solid objects to be incorporated. We present validation studies for sound generated by laminar and turbulent flows over a circular cylinder at Re 100 and 10,000, respectively. Our hybrid approach is validated against directly computed sound using a high-order compressible flow solver as well as the solution of the Ffowcs Williams and Hawkings equation in conjunction with compressible sound sources. We demonstrate that the sound predicted by a second-order hybrid approach is as accurate as sound directly computed byasixth-ordercompressible flowsolverinthefrequencyrangeinwhichlow-ordernumericscanaccuratelyresolve the flow structures. As an example of an engineering problem, we calculated the sound generated by flow over an automobile side-view mirror and compared it to experimental measurements. Nomenclature CD, CL = drag and lift coefficients, respectively c = speed of sound d = dimension of the problem eij = viscous stress tensor f = frequency G = Green’s function of the Helmholtz operator k = wave number L, Lc = width of the mirror, recirculation length M, Mi = freestream Mach number, freestream vector Mach