Anthropometry of external auditory canal by non-contactable measurement

Jen Fang Yu, Kun Che Lee, Ren Hung Wang, Yen Sheng Chen, Chun Chieh Fan, Ying Chin Peng, Tsung Hsien Tu, Ching I. Chen, Kuei Yi Lin*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

35 Scopus citations


Human ear canals cannot be measured directly with existing general measurement tools. Furthermore, general non-contact optical methods can only conduct simple peripheral measurements of the auricle and cannot obtain the internal ear canal shape-related measurement data. Therefore, this study uses the computed tomography (CT) technology to measure the geometric shape of the ear canal and the shape of the ear canal using a non-invasive method, and to complete the anthropometry of external auditory canal. The results of the study show that the average height and width of ear canal openings, and the average depth of the first bend for men are generally longer, wider and deeper than those for women. In addition, the difference between the height and width of the ear canal opening is about 40% (p<0.05). Hence, the circular cross-section shape of the earplugs should be replaced with an elliptical cross-section shape during manufacturing for better fitting.

Original languageEnglish
Pages (from-to)50-55
Number of pages6
JournalApplied Ergonomics
StatePublished - 01 09 2015

Bibliographical note

Publisher Copyright:
© 2015 Elsevier Ltd and The Ergonomics Society.


  • Anthropometry
  • Computed tomography
  • External auditory canal


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