What does ELF energy mean?

Extremely low-frequency (ELF) waves are of interest for communications systems for submarines . The relatively weak absorption by seawater of electromagnetic radiation at low frequencies and the existence of prominent resonances of the natural cavity formed by Earth and the ionosphere make the range between 5…

Extremely low-frequency EMFs (ELF-EMFs). This non-ionizing radiation field can be generated by a variety of sources, including power lines, electrical wiring, and personal appliances like electric shavers, hair dryers, and electric blankets.

Power lines, household wiring, and any device that uses electricity can generate ELF radiation.18 Nis 2017

Extremely low frequency (ELF) electric and magnetic fields exist wherever electricity is generated, transmitted or distributed in powerlines or cables, or used in electrical appliances.