<?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">sound devices</topic></authority><related type="narrower"><topic>[sound devices by acoustical characteristics]</topic></related><related type="narrower"><topic>[sound devices by function]</topic></related><related type="narrower"><topic>sound device components</topic></related><related type="narrower"><topic>sound modifying devices</topic></related><related type="narrower"><topic>audio maskers</topic></related><related type="narrower"><topic>audio oscillators</topic></related><related type="narrower"><topic>acoustical tonometers</topic></related><related type="narrower"><topic>clang analyzers</topic></related><related type="narrower"><topic>Galton whistles</topic></related><related type="narrower"><topic>harmonometers</topic></related><related type="narrower"><topic>laboratory organs</topic></related><related type="narrower"><topic>opeidoscopes</topic></related><related type="narrower"><topic>reverberators</topic></related><related type="narrower"><topic>phonelescopes</topic></related><related type="narrower"><topic>phonodeiks</topic></related><related type="narrower"><topic>phonometers</topic></related><related type="narrower"><topic>phono-projectoscopes</topic></related><related type="narrower"><topic>phonorganons</topic></related><related type="narrower"><topic>phonoscopes</topic></related><related type="narrower"><topic>photophones</topic></related><related type="narrower"><topic>pseudophones</topic></related><related type="narrower"><topic>quincke&apos;s tubes</topic></related><related type="narrower"><topic>Savart wheels</topic></related><related type="narrower"><topic>vibroscopes</topic></related><related type="narrower"><topic>sonometers</topic></related><related type="narrower"><topic>sound cages</topic></related><related type="narrower"><topic>sound controllers</topic></related><related type="narrower"><topic>sound generators</topic></related><related type="narrower"><topic>sound measurers</topic></related><related type="narrower"><topic>sound pendulums</topic></related><related type="narrower"><topic>sound perimeters</topic></related><related type="narrower"><topic>sound receivers</topic></related><related type="narrower"><topic>sound recorders</topic></related><related type="narrower"><topic>sound reproducers</topic></related><related type="narrower"><topic>sound spectrographs</topic></related><related type="narrower"><topic>sound stimulators</topic></related><related type="narrower"><topic>sound transmitters</topic></related><related type="narrower"><topic>tone variators</topic></related><related type="narrower"><topic>strobilions</topic></related><related type="narrower"><topic>tone difference apparatuses</topic></related><related type="narrower"><topic>tonoscopes</topic></related><related type="narrower"><topic>topophones</topic></related><related type="other"><topic>audio equipment</topic></related><related type="broader"><topic>Sound Devices</topic></related><variant type="other"><topic>devices, sound</topic></variant><variant type="other"><topic>sound device</topic></variant> <note xml:lang="en"><![CDATA[ Apparatuses, instruments, or other objects used to produce sound, whether musical or nonmusical.  ]]></note></mads>