The most striking difference between Australian, American and British accents is the pronunciation of individual letters. Vowel pronunciation is the most significant difference between British and Australian English. Australians elongate their vowels ("Eel-oon-gayte uur vowls"). Note that words ending with "ay" sound are pronounced "ie." Often today sounds like "to-die"
Some Australians speak quickly so the words run together and end sentences with an upward intonation. Sometimes comments sound like a question.
A lot of Australians shorten or abbreviate words and add an "o" to the end. Afternoon becomes "arvo" and business becomes "bizzo."
Overall, Australians use many words common to British English, such as "lift" instead of "elevator." If your country shows the Australian TV series Home and Away or Neighbours you will hear the Australian accent. Listen to the actors Hugh Jackman, Russell Crowe and Nicole Kidman as well.