Telephone: elastic — Teylers Museum

Telephone: elastic

Many a child nowadays still knows the device: the cord-telephone. Pierce two plastic cups, pull a cord through the holes, make a knot in the cord so that it is fastened to the bottom and pull the cord between the cups taut. The sound that is whispered in one cup can clearly be understood by someone at the other end. What does this prove? Simply that sound waves are propagated not only through air, but also through a taut cord. This specimen with boxwood ‘cups’ was purchased by the Haarlem firm of Funckler around 1880. Around this time the electric telephone became the fashion and the cord-telephone was a popular setoff at demonstrations.

Administration name

Fysisch Kabinet

Title

Telephone: elastic

Translated title

Telephone: elastic

Object number

FK 0288

Reproduction reference

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