Vibroscope

A mechanical vibroscope.

Vibroscope (Latin: vibrare 'vibrate' + scope) is an instrument for observing and tracing (and sometimes recording) vibration.^[1][2]

For example, a primitive mechanical vibroscope consists of a vibrating object with a pointy end which leaves a wave trace on a smoked surface of a rotating cylinder.^[3]

Vibroscopes are used to study properties of substances. For examples, polymers' torsional modulus and Young's modulus may be determined by vibrating the polymers and measuring their frequency of vibration under certain external forces.^[4] Similar approach works to determine linear density of thread-shaped objects, such as fibers, filaments, and yarn.^[5]

Vibroscopes are also used to study sound in different areas of the mouth during speech.^[6]

Jean-Marie Duhamel published about an early recording device he called a vibroscope in 1843.^[7]

References

1. Viroscope // Webster's Dictionary
2. Gibilisco, Stan (2001). The Illustrated Dictionary of Electronics. McGraw-Hill. p. 727. ISBN 0071372369. Retrieved 22 March 2013.
3. Avery, Elroy McKendree (1895). "School physics, a new text-book for high schools and academies". p. 238.
4. Wakelin, J. H.; Voong, E. T. L.; Montgomery, D. J.; Dusenbury, J. H. (10 March 1955). "Vibroscope Measurements of the Elastic Moduli of Nylon 66 and Dacron Filaments of Various Draw Ratios". Journal of Applied Physics. 26 (7): 786–792. Bibcode:1955JAP....26..786W. doi:10.1063/1.1722097. Archived from the original on 14 April 2013. Retrieved 22 March 2013.
5. Mackay, B.H.; Downes, J.G. (1958). "An Automatic Vibroscope". Textile Research Journal. Archived from the original on 28 April 2021. Retrieved 22 March 2013.
6. Vibroscope in a Russian pedagogic and physiology dictionary.
7. Burgess, Richard James (2014). The History of Music Production. Oxford University Press. p. 3. ISBN 978-0199357178. Retrieved 1 August 2019.