Sound-producing sand avalanches P

  title={Sound-producing sand avalanches P},
  author={A S Holtz},
Sound-producing sand grains constitute one of nature’ s more puzzling and least understood physical phenomena. They occur naturally in two distinct types: booming and squeaking sands. Although both varieties of sand produce unexpectedly pure acoustic emissions when sheared, they diŒer in their frequency range and duration of emission, as well as the… CONTINUE READING