Materials that sends sound from water to air may assist eavesdroppers

A fabric that may transport underwater sounds into the air, permitting them to be heard clearly above the water’s floor, could possibly be used for monitoring aquatic environments or eavesdropping on underwater communications.

Sound usually can’t journey between water and air due to a mismatch in densities between the 2 mediums. It as a substitute displays on the boundary.

Now, Bin Liang at Nanjing College in China and his colleagues have developed a fabric that enables nearly all the sound to move …