speaking tube


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speaking tube

a form of hearing aid, a tube with an earpiece at one end and a cone at the other; speech into the cone is amplified to the ear.

speak·ing tube

(spēk'ing tūb)
A tube with an earpiece at one end and a cone at the other to amplify sound, especially speech, received by the cone.
References in periodicals archive ?
The inside had been preserved to give a flavour of how it looked during the last war, complete with speaking tubes between floors which kept the girls entertained for way too long.
The exhibition, which runs until February 17, features a number of speaking tubes and periscopes, or participatory scopes.
When you listen through the speaking tubes you can hear distorted sounds throughout the building.