<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31307680</termId><termName>phonometers</termName><termType>PT</termType><termNote><![CDATA[ Instruments that measure the force or directionality of sound waves. Invented by Edison to measure the human voice. ]]></termNote><termCreatedDate>2026-03-30 20:22:48</termCreatedDate><relation><relationType>UF</relationType><termId>31307681</termId><termName>phonometer</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31299038</termId><termName>sound devices</termName><termType>PT</termType></relation></term>  </Zthes>