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Person

H. J. L. Struycken was a Dutch otolaryngologist, phonetician, and acoustician. After studying medicine in Groningen, in 1893 he started working at the Voorburg psychiatric hospital near Vught, where he attempted to distinguish psychiatric conditions from neurological speech disorders. His interest in phonetics and acoustics took Struycken to France and Germany, to visit clinics and approach instrument makers who could produce tuning forks for him to use in his clinical research.

1896
1950
Text
Nicola, Vicentino. 1561. “ Catalogo Della Biblioteca Del Liceo Musicale Di Bologna”. Nicolo Bevilacqua. http://www.bibliotecamusica.it/cmbm/scripts/gaspari/scheda.asp?id=1534.
Object, Instrument, Technology

In 1868, Henri-Victor Régnault described an apparatus for determining the speed of sound, capable of accurately measuring time intervals to fractions of a second.

Object, Instrument, Technology

The Fourier analyzer, which was called by Rudolph Koenig an “Analyzer of the timbre of sounds”, is a large device (about 36 inches tall) for simultaneously observing several components of a sound.

Object, Instrument, Technology

A windchest is a wooden box that holds air to be delivered to organ pipes, which are inserted in valved holes. These two examples were used in lectures to demonstrate the different characteristics of organ pipes of varying sizes and shapes.

Object, Instrument, Technology

The Case Collection of Physics Instruments (CCPI) has several dozen forks mounted on resonance boxes (see Fig. 1).

Object, Instrument, Technology

The fork-clock was first described by N. Niaudet in 1866. It is used to determine the frequency of a fork to high accuracy. The vibrating fork drives the clock in the same way as a pendulum in a pendulum clock–by way of an escapement mechanism. This Max Kohl clock uses a 100 Hz fork to drive a tiny escapement. Energy is provided by an enclosed wind-up spring. The three dials record the total number of vibrations. The absolute frequency of the fork can then be determined by comparison with an astronomical time standard.

Image
“Helmholtz Resonators By Rudolph Koenig”. n.d. Cleveland, OH: Case Western Reserve University.
Image
Koenig, Rudolph. 1889. Catalogue Des Appareils D'acoustique. Paris: Impr. de P. Mouillot.
Object, Instrument, Technology

(The following description is from a “Description of Appunn’s Tonnemeters,” by Alexander J. Ellis, F.R.S., &c.; MS in the Western Galleries of the South Kensington Museum, 1880. With the tonometers. Science Museum technical file T/1876-466. The note was written by Alexander J.