Marine mammals such as whales have been studied to be affected by underwater noises with behavioral and physiological responses. In Antarctic, human activities are increasing for scientific purposes, fishery and tourism in the sea. In the previous report, Antarctic tourism has been extremely growing that number of operators 5 hundred times from 1992 to 2018. However, ship noise effects have not been evaluated yet on seals living around Antarctica. In this study, I identified and counted the four types of vocalization of leopard seals near Jang Bogo Station at Terra Nova Bay Polynya (TNBP) using a low-frequency range passive auditory system within selected periods which were the first summer voyage of icebreaker research vessel (IBRV) Araon for three years (2016-2018). I aimed to test the hypothesis whether ship noise affects on the seal vocalizations in Antarctica. My findings show that leopard seals (i) decrease their vocalization frequency when the broadband noise source is presence which is likely to previous studies for different species in other region and (ii) increase their vocalization frequency by showing the Lombard effect as anti-masking behavior when the specific narrow bands induced by vessel propeller are existing which could not find in previous studies. These could be possible because leopard seal is known to sea ice dependent species in TNBP unlike mobile species such as whales. These newly findings suggest that leopard seals do flexibly anti-masking behavior due to the habitat preference unlike the whales.