Acoustic analysis of remote structures within a medium

A device for analyzing structures within a medium, the device comprising:

• at least one acoustic signal transmitter and acoustic signal receiver configured to output an acoustic signal and to receive an acoustic signal;
• an analyzer configured to analyze received acoustic data;
• a signal modifier configured to modify at least one of a phase and amplitude of said acoustic signal at least one of said acoustic signal transmitter and acoustic signal receiver;
• control circuitry for controlling analysis of said structure, said control circuitry being configured to:
• initiate analysis of a first portion of said structure by controlling said signal modifier to apply a signal modification to at least one of said acoustic signal transmitter and acoustic signal receiver to modify an acoustic signal according to first modification data;
• and
• initiate analysis of further portion of said structure by controlling said signal modifier to apply a signal modification to at least one of said acoustic signal transmitter and acoustic signal receiver to modify an acoustic signal according to further modification data.