A compact acoustic refrigeration system actively cools components, e.g., electrical circuits (22), in a borehole environment. An acoustic engine (12, 14) includes first thermodynamic elements (12) for generating a standing acoustic wave in a selected medium. An acoustic refrigerator (16, 26, 28) includes...http://www.google.fr/patents/US5165243?utm_source=gb-gplus-shareBrevet US5165243 - Compact acoustic refrigerator
