Reply to: ‘‘Comments on the influence of wind and temperature gradients on sound propagation calculated with the two‐way wave equation’’ [J. Acoust. Soc. Am. 91, 498–500 (1992)]

As shown by Pierce [J. Acoust. Soc. Am. 87, 2292–2299 (1990)], the influence of the static pressure on sound propagation through the atmosphere is only of the second order. For very accurate predictions, the improvements suggested by Raspet et al. [J. Acoust. Soc. Am 91, 498–500 (1992)] can be used, but then other second‐order effects and cross products should be taken into account as well. The two‐dimensional Fourier transform can be used for three‐dimensional sound‐pressure predictions considering the method of stationary phase. Errors are well within 2% for common temperature and wind gradients, provided that the wind vector is parallel to the vertical plane through the source and receiver. For situations with a cross‐wind vector full three‐dimensional calculations are recommended. These situations were avoided in the original article [Nijs and Wapenaar, J. Acoust. Soc. Am. 87, 1987–1998 (1990)].