Low frequency sound

Sounds with a frequency of 20 Hz and lower are called infrasound . Low frequency sound is understood to mean sound, the frequency of which is below 125 Hz. Infrasound and low frequency sound are difficult to hear, but they cannot be called completely inaudible.

At the other end of the spectrum are very low-frequency sounds (below 20 Hz), known as infrasound. Elephants use infrasound for communication , making sounds too low for humans to hear. Because low frequency sounds travel farther than high frequency ones, infrasound is ideal for communicating over long distances.3 Tem 2018

Sound at 20-200 Hz is called low-frequency sound, while for sound below 20 Hz the term infrasound is used. The hearing becomes gradually less sensitive for decreasing frequency, but despite the general understanding that infrasound is inaudible, humans can perceive infrasound, if the level is sufficiently high .