CIII. The correlation function in the analysis of directive wave propagation
Henrik Nodtvedt · The London Edinburgh and Dublin Philosophical Magazine and Journal of Science · 1951
Summary It is shown that the auto-correlation function might be applied when investigating the directive properties of waves which cover a wide frequency spectrum. Examples are given which clearly show that the subsidiary maxima in the calculated polar diagrams are reduced when widening the frequency band of the received signals. These subsidiary maxima are, further, smaller than those obtained when using ordinary phase comparison methods under the same conditions. Some possible implications in the field of audio-acoustics are mentioned, dealing with the sense of directivity of the human ears.