Asymmetry, Handedness and Auricle Morphometry

Tatlısumak, Ertuğrul; Yavuz, Mehmet Sunay; Kutlu, Necíp; Aşırdizer, Mahmut; Yoleri, Levent; Aslan, Asım

doi:10.4067/s0717-95022015000400057

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…Alexander et al (2011) discovered that linear dimensions, including height and width, showed a higher symmetry, while angular measurements had less symmetry between the left and right sides. Tatlisumak et al (2015) reported left ear length was significantly longer than the right length for the Turkish population while Jung and Jung (2003) concluded that Koreans have longer ear length on the right than the left side. These studies provided statistical findings of selected ear dimensions upon variables of population, age, gender, and symmetry.…”

Section: Resultsmentioning

confidence: 99%

“…Examples of (a) traditional measurement, (b) photogrammetric measurement (Ma et al, 2017), and (c) 3D scanning measurement Hossein, Payam, and Masih (2018) determined that Hamadan men had significantly greater ear size than Caucasian men. In regard to gender differences, these investigations revealed that females have smaller ear length and width than males for Korean (Jung & Jung, 2003), Turkish (Barut & Aktunc, 2006;Tatlisumak et al, 2015), and Italian peoples (Sforza et al, 2009). Alexander et al (2011) discovered that linear dimensions, including height and width, showed a higher symmetry, while angular measurements had less symmetry between the left and right sides.…”

Section: Resultsmentioning

confidence: 99%

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A systematic review on ear anthropometry and its industrial design applications

Luximon

2020

Hum Ftrs & Erg Mfg Svc

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Ergonomics is extensively studied to provide a scientific understanding of humans' physical and cognitive use of products and workplaces. Ergonomics of the external ear is crucial for the industrial design of various ear-related products. For this review, 50 articles regarding ear anthropometry and its applications in product design that met determined inclusion criteria were selected after searching four databases, including Scopus, Web of Science, PubMed, and Science Direct. Previous anthropometric information acquired with traditional measurement, photogrammetric method, and three dimensional (3D) anthropometric techniques (photogrammetry, magnetic resonance imaging, computerized tomography, 3D scanning, and ear impression).Those studies demonstrated that demographic factors, including age, ethnicity, gender, and ear symmetry, should be considered when designing for specific markets.Ear sizes kept growth throughout the entire lifetime. Results also showed that males had larger ear sizes than females in most populations. Most of linear, area, and ratio dimensions showed a good symmetry between left and right ears, while angular dimensions tended to be nonsymmetric. Differences in anthropometric findings existed among Asian, Western, and African populations. Hence, there is a need to establish more universal anthropometric databases for different ethnicities to meet the development of product form and function. Furthermore, fit and comfort perception was important to be examined for product design, which can be studied through questionnaire on comfort perception, analysis online comments of consumers, and virtual fit analysis. With a comprehensive presentation of literature, future research opportunities were inspired from the perspective of industrial design. K E Y W O R D S ear anthropometry, ear modeling, ergonomic application, industrial design, systematic review

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

A systematic review on ear anthropometry and its industrial design applications

Luximon

2020

Hum Ftrs & Erg Mfg Svc

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“…One of the most intricate body parts to model aside from the head is the auricle of the ear. Detailed information of the morphology, dimensions, location, and asymmetry of normal auricles is essential for diagnosing congenital abnormalities and syndromes, conducting forensic investigations, and ergonomically designing ear-related products (Coward et al, 2000;Purkait & Singh, 2007;Tatlisumak et al, 2015). Regardless of ethnicity, the literature shows that the mean dimensions of the auricle are larger in males than females, as evidenced by the numerous anthropometric studies that focus on the auricles of different ethnic groups, such as the Chinese (Liu, 2008;Wang et al, 2011;Yu et al, 2015;Zhu et al, 2017;Zhao et al, 2018;Fan et al, 2019), Koreans (Jung & Jung, 2003;Kang et al, 2006;Han et al, 2010;Lee et al, 2018), Malaysians (Kumar & Selvi, 2016), Indians (Purkait & Singh;Sharma et al, 2007;Purkait, 2013;Singhal et al, 2016), Sudanese Arabs (Ahmed & Omer, 2015), Italians (Russo, 1998;Ferrario et al,1999;Sforza et al, 2009), and Britons (Coward et al;Alexander et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Statistical Analysis of Shape of Auricular Concha for Mass Customization of OTC Hearing Aids

et al. 2021

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A detailed data of shape of auricular concha is currently not available. Therefore, this study constructed a framework to statistically analyze the shape of the auricular concha based on a database of 3D scanned images. The 3D models of the auricular concha from 308 study participants are converted into compatible NURBS surfaces generated through 795 data points to perform a requisite statistical analysis. Subsequently, the shape of the auricular concha of the participants is grouped into 29 clusters with a modified hierarchical clustering algorithm. Finally, a wear trial and simulation test are carried out to validate the wear comfort of a designed OTC hearing aids based on the average shape of each cluster. The experimental results show that the average shape obtained as per the cluster is capable of representing the common geometric properties of their corresponding members, and could thus be used as a reference in designing mass-customized OTC hearing aid. The method in this study is superior to conventional methods that rely on sparse results for shape analysis because it takes into account the intricate geometric shape of the auricular concha. The quantitative description of conchal morphometry will be beneficial for plastic surgeons, and for the ergonomic design of ear-related products.

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“…It is wellestablished fact that a detailed knowledge of the morphologic dimensions, location and asymmetry of normal auricle is essential for the diagnosis of congenital abnormalities and syndromes, forensic investigations and for the ergonomic design of hearing aids (Coward et al, 2000;Purkait & Singh, 2007;Tatlisumak et al, 2015). Therefore, a large number of anthropometric studies of normal auricle have been assessed in various populations, for instance, Koreans (Jung & Jung, 2003;Kang et al, 2006), Sudanese Arabs (Ahmed & Omer), Chinese (Liu, 2008;Wang et al, 2011) Indians (Purkait & Singh;Sharma et al, 2007;Purkait, 2013), Italians (GualdiRusso, 1998;Ferrario et al, 1999;Sforza et al, 2009), Britons (Coward et al; Alexander et al), Turks (Bozkir et al, 2006;Barut & Aktunc, 2006), Americans (Brucker et al, 2003), Germans (Niemitz et al, 2007), and Japanese (Asai et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

A Morphometric Study of Auricular Concha in the Population of Young Chinese Adults

Zhu

et al. 2017

Int. J. Morphol.

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SUMMARY:A detailed data of concha is currently not available. Therefore, the present study aimed to determine twelve morphometric measurements of concha, to investigate its sexual dimorphism and bilateral asymmetry, and to establish basic shapes of concha for both sexes and sides. The study sample comprised of 310 young Chinese aged 18-28 years. 141 left and 141 right ear impressions for females, 169 left and 169 right ear impressions for males were collected and scanned. The 3D coordinates of seven landmarks on each auricular concha were obtained using 3D scanning technology and curvature theory. From the landmarks, twelve morphometric measurements of concha were calculated and analyzed. The conchal morphometry exist significantly sexual dimorphism in this study sample. On average, all measurements were larger in males than in females regardless of the sides. There was significantly bilateral asymmetry among left and right conchae in both sexes. Some measurements were larger in the right sides and some measurements were larger in the left sides, but the bilateral difference in both measurements found to be less than 1mm. Additionally, the basic shapes of concha for both sexes and sides were established on the basis of the mean 3D coordinates of each landmark and the mean value of each measurement. The anthropometric method of this study could overcome the difficulty in locating landmarks of auricle complex structures, and attain a higher level of accuracy in the procedure of measurement. The quantitative description of conchal morphometry will be beneficial for plastic surgeons, and for the ergonomic design of hearing aids.

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Asymmetry, Handedness and Auricle Morphometry

Cited by 7 publications

References 17 publications

A systematic review on ear anthropometry and its industrial design applications

A systematic review on ear anthropometry and its industrial design applications

Statistical Analysis of Shape of Auricular Concha for Mass Customization of OTC Hearing Aids

A Morphometric Study of Auricular Concha in the Population of Young Chinese Adults

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