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sound barrier noun

  • (uncountable) Sonic barrier, the sudden increase in drag (resistance) and other effects experienced by moving objects when their speed approaches that of sound or becomes supersonic (which used to be considered a barrier to higher speeds).
 Schallmauer
  • (countable) A noise barrier, a structure beside a highway designed to reduce the noise of traffic.
 Lärmschutzwall, Lärmschutzwand
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