What instrument did Helmholtz develop?
A Polyphonic siren
A Telescope
A Stethoscope
An Abacus
Answer
Helmholtz developed a Polyphonic siren. The siren was a device that created a series of pitches in succession. This was done by varying the speed at which the siren rotated. The siren could produce a wide range of pitches, making it a useful tool for research into the perception of pitch.
The Remarkable Journey of Hermann von Helmholtz: A Quiz on a Pioneer of Physics and Physiology
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