Double sound pendulum
35 x 60 x 18 cm (h x w x d)

The sound pendulum was originally developed by Christian Heinrich Wolke (1741-1825), who called it the "Akumeter". Together with a pharmacist from Jever, Wolke tried to enable the deaf to hear by means of electrical stimulation. The success of the treatments was to be objectively recorded with the Akumeter.
The invention of the sound pendulum is often attributed to Gustav Theodor Fechner, who wanted to use it to verify Weber's law for the field of hearing.

Plus de The Center for the History of Psychology presents:

Otto Heller and his team at Chair III
150 x 100 x 2.5 cm (h x w x d)
The Center for the History of Psychology presents:
Gustav Lienert & Wilhelm Arnold
120 x 150 x 2 cm (h x w x d)
The Center for the History of Psychology presents:
A stimulus series of apples
18 x 80 x 40 cm (h x w x d)
The Center for the History of Psychology presents:
Institute for Psychology, Chair I
150 x 100 x 2 cm (h x w x d)
The Center for the History of Psychology presents:
Colloquium
100 x 150 x 2.5 cm (h x w x d)
The Center for the History of Psychology presents: