Tag: Al-Askharah

Conceptual illustration of a sunlit golden dune with a steep slip face and a narrow sand-slide channel, with a metal sieve and two trays of sand in the foreground under a clear blue sky; illustrates grain-size experiments, not a photograph of the study site.

Why Can a Sand Dune Sing More Than One Note?

 cacophony  10/30/2026

Sorting grains made noisy singing sand produce a clearer note. Laboratory avalanches reveal what grain size contributes to a dune’s sound.

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