Oswald Külpe at the double sound pendulum (~1900).
150 x 100 x 2.5 cm (h x w x d)
Oswald Külpe sitting in front of a double sound pendulum which was used e.g. for the determination of just noticable differences in audition.
Oswald Külpe sitting in front of a double sound pendulum which was used e.g. for the determination of just noticable differences in audition.