Ultrasensitive Underwater Microphone Inspired by Orca Ears

From Gizmag Emerging Technology Magazine:

Given how poorly light and radio signals are able to travel underwater, sound is still the best medium for wireless undersea communications. Conventional underwater microphones - or hydrophones - have their limitations, however. One of their main problems is that the deeper they go, the less sensitive they become. Scientists from California's Stanford University have now found a solution to that problem, in the form of a hydrophone that is designed to perform like an orca's ear.

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