By integrating these fibers into acoustic sensing systems, we can detect and measure sound waves with remarkable precision and efficiency. 62 uses two different types (in the following referred to as displacement and pressure sensors), both based on the principle of the fibre tip. A fiber-optic sensor is a sensor that uses optical fiber either as the sensing element ("intrinsic sensors"), or as a means of relaying signals from a remote sensor to the electronics that process the signals ("extrinsic sensors"). Fibers have many uses in remote sensing.