High-Speed Motion Pictures of the Human Vocal Cords (1940)

Director
Producer	Bell Telephone Laboratories
Contributors	Motion Picture Library, American Medical Association
Length	12 minutes
B&W/Color	Black and White
UO Library Catalog description:	Illustrates apparatus developed for high speed photography of the human vocal cords. Describes briefly the position and action of vocal cords. Presents mirror views of normal larynx during production of sounds of different intensity and pitch. For laryngologists.
Call #	FILM MB294
Genre	Instructional
Rare	Yes
Online	No
Copyright status	Public Domain
Physical condition	Fair
Oregon-related	No

Notes:

This silent film documents (using Bell Telephone Lab’s patented down-the-throat camera) the physical motions of human vocal cords while at rest and while producing different notes and pitches. Also recorded are the effects of helium gas on the vocal cords.