Researchers at the Electronics and Telecommunications Research Institute of South Korea have developed a new magnetic induction wireless technology capable of transmitting voice signals up to 100 meters underground . The system is designed to address critical safety communication gaps in military operations , mining industries , and rescue missions during natural disasters. How Through-The-Earth Technology Works Developed as part of the “Through-The-Earth” project , this communication breakthrough was demonstrated successfully at a depth of 100 meters. Traditional radio frequency communication systems can only penetrate a few meters into the ground. To overcome this limitation, the new system utilizes extremely low-frequency electromagnetic waves , generating an electric current that produces low-frequency radio magnetic induction . This physical mechanism allows the signals to pass efficiently through dense soil , concrete , and rock layers over much greater distances.…