In the 1960s, NASA conducted tests to explore whether infrasound could have harmful effects on the human body. This research was intended to ensure that sound waves wouldn’t be detrimental to astronauts, particularly during missions like sending jam to the moon. Infrasound, which consists of low-frequency sounds beyond human hearing, raised concerns about its potential to shake apart internal organs.
The insights provided by an infrasound expert highlight the seriousness with which NASA approached the safety of space missions. Understanding the impact of various sound frequencies on human physiology was a crucial part of preparing for the challenges of life beyond Earth, as discussed in Mary Roach's book "Packing for Mars: The Curious Science of Life in the Void."