Hydrophone arrays use underwater microphones connected by cables to detect volcanic activity, earthquakes, and wildlife under the sea. Individual hydrophones are installed on continental slopes and underwater mountains to record sound waves across large ocean areas without obstruction. Hydrophone arrays can be designed with broadband sensitivity to locate submarines, track marine animals, and study climate change by detecting temperature differences.

1. HYDROPHONE ARRAY
Hydrophone arrays have been developed to detect and monitor previously
unheard volcanic and earthquake activity in the oceans and in sea waves.
Hydrophones are connected by undersea communication cables to facilities on
seaside. Individual are installed essentially on continental
hydrophone array
slopes and seamounts at locations that are unobstructed by seafloor features that
would block sound wave transmission across large areas of the oceans. There are
many ways to design hydrophones. We can design hydrophone with adequate
broadband sensitivity. The hydrophones are small, lightweight, and inexpensive
compared to the high-power projectors needed for active sonars. The
hydrophone arrays are used to locate submarines. To track marine mammals and
even to study global climate change by for example detecting temperature
differences hydrophone arrays used.