There are several varieties of carpet beetles in Australia, but the treatment is the same. Treatment entails spraying the entire area of infected carpet, including (and this is the hard part) under all furniture. If it is to be done correctly and thoroughly, it is also advisable to “gas” which is actually a space spray, to ensure none are missed in the carpet treatment.
Carpet beetles, despite their name, actually thrive in bird nests, dead rodents, and even pipe lagging in roof voids, so a treatment of your roof void is also carried out. This entails blowing a pyrethrum dust into your roof void under pressure