Questions

The human ear can respond to minute pressure variations inthe air if they are in the audible frequency range, roughly 20 Hz -20 kHz. In fact, tests conducted show an increased sensitivity in the 3000 Hz range which is the optimal amplification frequency in the human ear. So, the sensitivity of the human ear varies with the frequency of the sound.

In the exclusive economic zone, the coastal nation has sovereign rights for the purpose of exploring and exploiting, conserving and managing the natural resources, whether living or non-living, including production of energy from the water, currents and winds. However, In the exclusive economic zone, all nations, whether coastal or land-locked shall enjoy the freedom of navigation and overflight and of the laying of submarine cables and pipelines, and other internationally lawful uses of the sea. That means fourth right is not exclusive only for the coastal nations.