| Ultra low frequency ✕ | |
|---|---|
| Abbreviation | ULF |
| ITU band | 3 |
| Min frequency in air (Hz) | 300 |
| Max frequency in air (Hz) | 3000 |
| Min period in air (s) | 0.000333 |
| Max period in air (s) | 0.003333 |
| Min wave length in air (m) | 999308.193333 |
| Max wave length in air (m) | 99930.819333 |
| Example of use | Submarine communication, communication within mines |