Recording and Analysis of Extremely Low Frequency Signals in our Environment

The book explores the development of ELF (Extremely Low Frequency) receiver technology, stemming from an accidental discovery in 2001. Driven by curiosity, the author sought to create an affordable and accessible means of receiving ELF signals. The resulting technology incorporates both hardware and software designed with readily available, low-cost components. It allows users to utilize any standard PC equipped with a USB connector and sound card for detection and analysis, making it an innovative solution for enthusiasts and researchers in communication technology.