<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31307755</termId><termName>topophones</termName><termType>PT</termType><termNote><![CDATA[ Devices comprised of acoustic receivers positioned at right angles to one another and attached to a shaft that is held by the user. The sound collected by these horns is conducted to ear-pieces through rubber hoses. Developed to discover the position of the source of sounds in space, as invented ca.1880, particularly for use on ships to locate the position of foghorns. ]]></termNote><termCreatedDate>2026-03-30 20:22:49</termCreatedDate><relation><relationType>UF</relationType><termId>31307756</termId><termName>topophone</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31299038</termId><termName>sound devices</termName><termType>PT</termType></relation></term>  </Zthes>