The US Navy has demonstrated a sonar made from carbon nanotubes, called a thermophone, that takes heat and converts it into sound without any moving parts.
The demonstration was conducted using a small unmanned underwater vehicle (UUV) during the annual Advanced Naval Technology Exercise (ANTX) held at the Naval Undersea Warfare Center (NUWC) Newport Division, Rhode Island.
The carbon nanotubes heat up quickly, but they do not retain much heat, so they have high thermal conductivity, Louis Carreiro, senior scientist at NUWC, told Jane’s .
“They can heat quickly and cool quickly but by the same token the amount of heat they retain is very small, so they have a low heat capacity,” he said.
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