[Skip to Navigation]
June 1934


Author Affiliations


Arch Otolaryngol. 1934;19(6):708-710. doi:10.1001/archotol.1934.03790060057007

This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.


The stroboscopic principle was first used for the examination of the vibrations of a taut string making a musical note. As these vibrations are too rapid for visual perception it was necessary to find some means whereby a slow motion effect could be obtained. This was done by the use of interrupted light, usually with a rapidly revolving perforated disk. By this means a fleeting glimpse was obtained as each perforation in the disk came into view. This divided the cycles or phases of the vibrations in such a way that there was an apparent retarding of the movement, although a true picture was given in its complete cycle. In other words, a small bit of each phase is seen, which, coupled with the next succeeding glimpse in a later cycle, gradually builds up an apparently complete cycle or vibration from many actual vibrations.

The human vocal cords also vibrate

First Page Preview View Large
First page PDF preview
First page PDF preview