<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">transducers</topic></authority><related type="narrower"><topic>magnetostrictive transducers</topic></related><related type="broader"><topic>equipment by process</topic></related><variant type="other"><topic>transducer</topic></variant> <note xml:lang="en"><![CDATA[ Generally, devices that can transform an input of physical quantity, usually coming from an energy source, into an output quantity typically of a different kind, for instance, converting solar heat into electricity, or pressure into hydraulic energy. Many devices, such as phonograph pickups, microphones, thermometers, loudspeakers, and light meters, can be termed transducers.  ]]></note></mads>