The low frequency (LF) range is the frequency range between 30 kHz to 300 kHz with wavelengths between 10 km and 1 km. Long wave
is transmitted in the low frequency range.International Telecommunication Union (ITU) uses the band designation 5. The band number (N) and the frequency range have a direct mathematical relationship of 0.3 x 10expN to 3 x 10expN. The expN of band number 5 is 100,000, multiplied by 0.3 gives a lower frequency of 30 kHz.