- Phonodeik
The Phonodeik is an
sound recording apparatusinvent ed byDayton Miller in 1908. The Phonodeik convert sound waves into visual images. The name was suggested by Edward W. Morley. Before electronic oscilloscopes, this device was used for analyzing soundswave s. The Phonodeik can be modified to project sound waves on a screen for public demonstration.Description
The Phonodeik used
photograph ic material to record sound. A diaphragm receiver of thin glass is at the end of a resonator horn. Behind the diaphragm is asteel pulley spindle mounted in jeweled bearings with an attachmirror and oscillating tension spring. Wrapped on the pulley spindle is thinsilk fiber s orplatinum wire turning around the mirror with amplitude. The sound vibrates the diaphragm on the bottom and a light beam is reflected to the sensitive photographic paper (or a projection screen).ee also
*
Oscilloscope
*Sonograph External links and references
* "Lecture III -- Methods of recording and photographing sound waves -- [http://www.srm.com/1916/lecture3phonodeik.html Phonodeik] ". The science of musical sounds.
* Hoekje, Peter L. and William Fickinger, " [http://adsabs.harvard.edu/cgi-bin/nph-bib_query?2001ASAJ..115.2492H Acoustic teaching apparatus before 1929 at the Case School of Applied Science] ".
* Gilliam, L., and W. Lichtenwanger, " [http://memory.loc.gov/ammem/dcmhtml/dmbio.html The Dayton C. Miller Flute Collection: A Checklist of the Instruments] ". Washington, D.C.: Library of Congress. 1961. [via American Menory]
* Greenslade, Jr., Thomas B., " [http://physics.kenyon.edu/EarlyApparatus/Acoustics/Sonograph/Sonograph.html The Sonograph ] ". [http://physics.kenyon.edu/EarlyApparatus/index.html Instruments for Natural Philosophy] , Kenyon College, Gambier, Ohio.
* " [http://www.sapere.it/gr/ArticleViewServletOriginal?otid=GEDEA_fonodeik&orid=GEDEA_fonodeik&todo=LinkToFree fonodèik] ". Enciclopedia Generale. (Italian)
* Miller, Dayton, " [http://vax.vmi.edu/MARION/AAD-1840 Sound Waves: Their Shape and Speed] ". 1937.
* Miller, Dayton. " [http://www.srm.com/1916/ The Science of Musical Sounds] ". 1916.
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