31. Some hydraulophones include an underwater hydrophone pickup to allow the sounds produced by the water to be electrically amplified. 32. In 2010, the latest generation " ZRay " model was completed and includes a 27 channel hydrophone array. 33. After a hydrophone was invented, she said, " recording gear that could be taken to sea was needed. 34. She sailed to Portsmouth, New Hampshire on 11 January 1946 and experiments were conducted on her special hydrophone gear. 35. Other sensors, including a radar capable of catching a periscope or antenna from the sub, complement the hydrophone systems. 36. Among the supplementary instruments scientists plan to install is a hydrophone capable of listening to whale calls and tracking their migrations. 37. Defense Headquarters later said the sounds picked up by a hydrophone on the Tui may have been whales or large fish. 38. Note the teardrop-shaped fairing for the large hydrophone array beneath the bow and the figure-eight pressure hull. 39. Sonobouys float on the surface and release a hydrophone that descends and can detect ULB signals up to below the surface. 40. The scientists then broadcast a short ping from a hydrophone moored near the shore, which acted in place of a submarine.
