speaking tube

(redirected from Voicepipe)
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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 ?
They consist of army barracks, ammunition stores, water supply systems (wells, pumps and storage tanks), air filtering systems, diesel generators of electric power, a telephone network, voicepipes, grenade chutes, periscope orifices and, of course, arms and gun carriages.