Since the band covers the nominal range of human hearing (20 Hz to 20 kHz), if they were mechanical waves rather than EM waves, they’d be audible. Such long wavelengths give the VLF band ...
Defined through a late-2024 ground magnetic and very low frequency (VLF) electromagnetic (EM) survey ("VLF-EM survey"), these anomalies establish key interpreted structural and lithological ...
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