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Audio element detection in wireless sensor networks (WSNs) has great significance in our lives (e.g., in detecting traffic jam and accident, gun shots and explosion, and hurricane). It is particularly useful when video cameras cannot be used effectively (e.g., in darkness, with a wide range to cover); audio sensors are also much cheaper. However, most previous works on audio element detection require a large number of training examples to obtain satisfactory results. This becomes even moredoi:10.1155/2013/607187 fatcat:leju5hjotnee7os3bcn7ge6z7a