Some recent measurements of the attenuation of the direct sound in concert halls have produced results that are qualitatively very similar to results obtained from measurements of the horizontal propagation of sound over open grassland. In particular, both sets of results show large attenuations in the mid‐ to low frequency region, and the actual frequency of maximum attenuation depends in both cases on the heights of the source and the receiver above the floor or ground. This Letter draws attention to the similarities between the results of the two experiments and concludes that similar processes are involved.