A tonometer constructed from 56 individual tuning forks allowed Johann Heinrich Scheibler to measure absolute pitch by counting audible beats. This apparatus utilized a wooden board and a metronome to calculate vibration frequencies, marking a significant contribution to acoustics by a man primarily occupied with the manufacture of silk in the Prussian city of Krefeld.
Textile Manufacturing and Public Service
Born in Monschau in 1777, Scheibler established his career in Krefeld, Germany. While his primary professional identity was that of an entrepreneur within the textile industry, his role in the city extended into municipal administration. His work occurred during an era defined by the influence of chartered companies and the risks associated with long-distance trade, where the regional regulatory environment and capital availability in Germany dictated the scope of his industrial activities.
Twenty questions, eight minutes on the clock, and a percentile measured against everyone who has taken it. No sign-up.
Take the IQ test →Contributions to Musical Acoustics
Despite lacking a formal scientific background, Scheibler conducted extensive research into music theory and physics. His development of the tonometer, described in his 1834 publication 'Der physikalische und musikalische Tonmesser', provided a method for determining frequency intervals between tuning forks. By observing the beating frequency and applying the formula F1 plus beats equals F2, he refined methods previously explored by Joseph Sauveur. His 1837 work, 'Ueber mathematische Stimmung, Temperaturen und Orgelstimmung nach Vibrations-Differenzen oder Stößen', further addressed the mathematics of tuning and organ calibration.
The Aura Instrument
Scheibler also engaged with the technical aspects of musical performance. In 1816, he developed a device he named the 'Aura', which consisted of a support disc holding up to ten mouth harps. By tuning each harp to a distinct basic tone, he enabled the performance of chromatic sequences, showcasing his mechanical ingenuity alongside his theoretical interests in vibration and sound.
Fast facts
- Born: 1777, Monschau
- Died: 1838, Krefeld
- Citizenship: Germany
- Primary Occupation: Silk manufacturer
- Scientific Interests: Acoustics and music theory
- Notable Invention: Tonometer (1834)
- Musical Innovation: Aura (1816)
Questions readers ask
What was the purpose of Scheibler's tonometer?
It was designed to accurately measure pitch and absolute vibrations using 56 tuning forks and a metronome.
What was the Aura instrument?
The Aura was an instrument featuring up to ten mouth harps mounted on a support disc, tuned to allow for chromatic sequences.
.jpg)
