Measuring the External Ear for Hearing Protection Device Design

• Mohammad Amin Mououdi ^[1] ; Jafar Akbari ^[2] ; Maryam Mohammadi Khoshoei ^[3]
  1. [1] Mazandaran University of Medical Sciences

     Mazandaran University of Medical Sciences

     Irán

     
  2. [2] National Iranian Gas Company (IR)
  3. [3] National Iranian Oil Refining and Distribution Company (IR)

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• Localización: Ergonomics in Design: The Quaterly of Human Factors Applications, ISSN 1064-8046, Vol. 26, Nº. 3, 2018, págs. 4-8
• Idioma: inglés
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• Resumen

  • In this study we aimed to obtain anthropometric measurements of external ear dimensions for designing hearing protection devices (HPDs). We measured 3 dimensions of left and right ears of 153 operational workers and compared the measured data with earplugs (Eps) and earmuffs (Ems). The mean (± SD) earhole length, pinna length, and pinna width for the subjects were 14.6 (± 2.5), 62.8 (± 5.0), and 34.8 (± 4.2) mm, respectively. The mean longitudinal and transverse diameters of the Ems for the ear were close to the 95th and 97.5th percentile, respectively. The Ems met the optimal threshold of ergonomic design; however, the Eps required a better design.