It's impossible to definitively say what the "quietest place on earth" is, as quietness is a relative concept and can be measured in different ways. However, there are some places that are known for their extreme silence.

Here are a few contenders:

* The anechoic chamber at Orfield Laboratories in Minneapolis, Minnesota: This chamber is designed to absorb 99.99% of sound, making it the quietest place on Earth according to the Guinness Book of World Records. People can only stay in the chamber for a short period of time because the lack of external sounds can trigger hallucinations.

* The South Pole: The extreme isolation and absence of wind and human activity make the South Pole one of the quietest places on Earth.

* The bottom of the Mariana Trench: The deepest point in the ocean is also extremely quiet, with almost no sound reaching the depths.

* The Boundary Waters Canoe Area Wilderness in Minnesota: This vast, remote area is known for its pristine wilderness and lack of human activity, creating an exceptionally quiet environment.

* The Sonoran Desert at night: The desert air is dry and still, and the lack of vegetation and human activity creates a sense of profound quietude.

Ultimately, the quietest place on Earth is subjective and depends on what you consider to be "quiet." Some people might find peace and quiet in the stillness of nature, while others might prefer the controlled silence of an anechoic chamber.