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 ?
Likewise, stationary play equipment (such as freestanding speaking tubes or activity panels or ground-level sandboxes) that require a user to maintain constant contact with the ground have no individual use zone requirements, but must have sufficient space between it and adjacent equipment for play and circulation.
Their world is ruled by periscope-like speaking tubes that rise out of the ground to deliver snatches of adult speech, sometimes in unidentifiable languages; a sun with the smiling face of a real baby; and a broadcasting tower like a huge toy windmill.
The exhibition, which runs until February 17, features a number of speaking tubes and periscopes, or participatory scopes.