Question

how do people live in igloo

Answer 1

people live in igloo silently without making noise

Answer 2

Also igloos are stereo-typically associated with all Eskimo peoples, they were traditionally associated with people of Canada's Central Arctic and Greenland's Thule area. Other Inuit people tended to use snow to insulate their houses, which were constructed from whalebone and hides.
First of all, igloos are built out of bricks of ice. Unlike solid ice, which is a poor insulator for heat, compressed snow has more air pockets, making it an ideal insulator. Now, inside the igloo, things aren’t normal either. This ice shelter is tiered for maximum protection. The coldest part of the igloo is its lowest level; this is where the entrance is located, which is usually at a right angle, providing protection from any high winds that may blow directly into the shelter. Fire is built at the second layer of the igloo to heat up the air. At the uppermost part of the igloo is where the people sleep. Since all the cool air inside the igloo goes to the bottom part and remains there, the upper levels stay warm. A small hole at the top also prevents the igloo from storing too much smoke.