🌐EnglishEnglishEspañolFrançaisNederlandsPortuguêsSvenskaРусский한국어中文日本語EntityQ1319005· pop 10· linked from 84 articlesspeaking tubeair pipe through which speech can be transmitted over an extended distanceConnectionsheadphoneEntitywireless communicationEntityCategoriesAccuracy disputes from September 2022History of telecommunicationsTelephony