This paper examines an analytical model of the dynamic response, vibration isolation, and sound radiation of a resiliently supported track slab. Railroad rails are viewed as beams fastened elastically to a slab which is resiliently mounted to a substructure, and the slab is assumed to be a plate of finite width and infinite length. The analysis accounts for several different mechanisms of vibration transmission from the rail to the slab, including structural nearfield, farfield, and coincidence effects. The results show that the slab is a very effective vibration isolator but is a sounding board at low frequencies. Proper choice of rail and slab parameters can make this low‐frequency radiation comparable to the low‐frequency sound ordinarily generated by an electrically powered rail vehicle.