<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31351178</termId><termName>anechoic rooms</termName><termType>PT</termType><termNote><![CDATA[ Specially constructed rooms with walls desgined with such sound-absorbency that the interior is as close to total silence as possible. They are generally used for scientific experiments. ]]></termNote><termCreatedDate>2026-03-30 20:34:45</termCreatedDate><relation><relationType>UF</relationType><termId>31351179</termId><termName>anechoic chambers</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31351180</termId><termName>anechoic room</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31351181</termId><termName>chambers, anechoic</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31351182</termId><termName>rooms, anechoic</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31323761</termId><termName>rooms and spaces by property</termName><termType>PT</termType></relation></term>  </Zthes>