In the exclusive economic zone, the coastal State shall have the exclusive right to construct and to authorize and regulate the construction, operation and use of: (a) artificial islands; (b) installations and structures for the purposes provided for in article 56 and other economic purposes;
Infrasound may also be used for long-distance communication in African elephants. These calls range from 15â35 Hz and can be as loud as 117 dB, allowing communication for many kilometres, with a possible maximum range of around 10 km (6 mi).
Infrasound: The Fear Frequency. Infrasound is sound below 20 Hz, lower than humans can perceive. But just because we donât consciously hear it, that doesnât mean we donât respond to it; in certain individuals, low-frequency sound can induce feelings of fear or dread or even depression.