What does ELF stand for?

ELF stands for "Extremely Low Frequency (30 - 300 Hz)"

How to abbreviate "Extremely Low Frequency (30 - 300 Hz)"?

"Extremely Low Frequency (30 - 300 Hz)" can be abbreviated as ELF

What is the meaning of ELF abbreviation?

The meaning of ELF abbreviation is "Extremely Low Frequency (30 - 300 Hz)"

What does ELF mean?

ELF as abbreviation means "Extremely Low Frequency (30 - 300 Hz)"