Phononic crystal: the barrier was created using two different lattices that comprised acrylic cylinders. (Courtesy: University of Hong Kong) A curious effect called “Klein tunnelling” has been ...
Consider the room in Figure above to be an anechoic chamber with dimensions 20 ft long × 15 ft wide × 12 ft high. A sound source is located in the room 1.5 ft above the floor, 8 ft away from one of ...
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