The ship's acoustic signature will also doubtless have been modified so that it runs as quietly as possible.

The innovative technology allows the user quickly and accurately to measure the acoustic signature of a pipe, to determine the severity and location of any defects.

The ships were built with steel hulls which were degaussed but no specific attempt was made to reduce electrical or acoustic signature.

Propulsion by water jet, again one in each hull, gives a low acoustic signature.

They have been used against submarines, as submarines sometimes lie on the seafloor to reduce their acoustic signature.