The Canberra Times reports that an air search for Prabhdeep Srawn is focusing on a specific location within the Kosciuszko National Park, about 350 kilometres southwest of Sydney.
It says a search helicopter used a thermal camera in an effort to locate the source of the voices, but no one has been found yet.
The 25-year-old Brampton, Ont., man hasn't been heard from since parking his rental car May 13 in the village of Charlotte Pass.
Members of his family have arrived in Australia to help in the search.
They believe that Srawn's chances of survival are a bit higher than a normal hiker because he has had extensive survival training as a reservist in both the Canadian and Australian military.
The search is being conducted by Australian National Parks and Wildlife Service officers, police and State Emergency Service volunteers.
The hiking route Srawn is believed to have taken is considered an easy walk in good weather, but it can quickly become very treacherous in bad weather.
Should the search be suspended completely, the family said it would ask the Canadian government to pressure Australian officials to send in the military.
Canadian consular officials in Sydney have been in contact with the family to offer their assistance.