Stern's Tone variator, 1897.

Hills, Jennie

 
Stern's Tone variator, 1897.
4 0 c m
 
34cm
actual image size: 26cm x 32cm

Description

Invented by psychologist Wilhelm Stern, the tone variator is an instrument that was devised to test an individual's ability to judge very small differences in pitch. Stern invented this in order to study a person's sensitivity to 'change'. This marked a significant shift in the progres of psychophical research as, previously, this research had investigated a person's sensitivity to differences in constant stimuli.

© Science Museum / Science & Society Picture Library

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