The 136.1 Hz frequency is the sound of Earth itself - calculated from our planet's orbit around the sun. When you strike this fork, you're literally tuning yourself to Earth's rhythm. This weighted fork is often called the "OM fork" because it matches the traditional OM chant used in meditation for thousands of years. It works directly on your vagus nerve - the master control switch that tells your entire body to calm down. Within minutes of using it, most people notice their breathing deepens, their shoulders drop, and that constant background anxiety quiets. It's particularly powerful for those who feel disconnected, anxious, or unable to relax despite trying everything else. The vibration creates an immediate sense of being grounded and present.