Intervallapparatus according to Anton Appunn, Hanau
24 x 52 x 26 cm (h x w x d)
3D-Animation Intervallaparatus

The company Anton Appunn from Hanau near Frankfurt built interval apparatuses for Carl Stumpf's experiments. Together with Appunn, Stumpf conducted sound analyses on the organ as well as psychoacoustic investigations. Later, other companies also offered such acoustic devices.
The Appunn company also built instruments for Hermann von Helmholtz.

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The Center for the History of Psychology presents:

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Narziß Ach (1871-1946)
150 x 100 x 2.5 cm (h x w x d)
The Center for the History of Psychology presents:
Karl Marbe (1869-1953)
150 x 98 x 2.5 cm (h x w x d)
The Center for the History of Psychology presents:
Külpe on the Würzburg School
150 x 200 x 2.5 cm (h x w x d)
The Center for the History of Psychology presents:
Double sound pendulum
35 x 60 x 18 cm (h x w x d)
The Center for the History of Psychology presents:
Oswald Külpe at the double sound pendulum (~1900).
150 x 100 x 2.5 cm (h x w x d)
The Center for the History of Psychology presents: