The idea that scientists have recorded the "sounds of hell" in the Kola Superdeep Borehole is actually a myth or an urban legend. The Kola Superdeep Borehole is a real scientific drilling project conducted in the 1970s and 1980s in Russia. While the borehole did reach a depth of about 7.5 miles (12 kilometers), there is no scientific evidence or credible documentation to support the claim that "sounds of hell" were recorded.
The concept of the "sounds of hell" is rooted in religious folklore and has been popularized in various forms of media. It often refers to a belief that deep within the Earth or some other subterranean location, there exists a realm of torment or demonic presence.
It's important to approach such claims critically and seek reliable sources of information. In this case, there is no scientific basis or credible evidence to support the existence of recorded sounds from hell in the Kola Superdeep Borehole or any other scientific endeavor.