New HRCT-Based Measurement of the Human Outer Ear Canal as a Basis for Acoustical Methods
| Autor: | Cornelia Thiele, Johanna Grewe, Thomas Lenarz, Peter Raab, Magnus Teschner, Tobias Sankowsky-Rothe, Matthias Blau, Hamidreza Mojallal |
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| Rok vydání: | 2013 |
| Předmět: |
Adult
Male medicine.medical_specialty Adolescent Computer science Acoustics Audiology Auditory canal Young Adult Speech and Hearing Hearing Aids Hearing X ray computed Prosthesis Fitting otorhinolaryngologic diseases medicine Outer ear Humans Sound pressure Aged Retrospective Studies Aged 80 and over Anatomy Middle Aged Cochlear Implants medicine.anatomical_structure Female sense organs Tomography X-Ray Computed Eardrum Ear Canal |
| Zdroj: | American Journal of Audiology. 22:65-73 |
| ISSN: | 1558-9137 1059-0889 |
| DOI: | 10.1044/1059-0889(2012/12-0039) |
| Popis: | Purpose As the form and size of the external auditory canal determine its transmitting function and hence the sound pressure in front of the eardrum, it is important to understand its anatomy in order to develop, optimize, and compare acoustical methods. Method High-resolution computed tomography (HRCT) data were measured retrospectively for 100 patients who had received a cochlear implant. In order to visualize the anatomy of the auditory canal, its length, radius, and the angle at which it runs were determined for the patients' right and left ears. The canal's volume was calculated, and a radius function was created. Results The determined length of the auditory canal averaged 23.6 mm for the right ear and 23.5 mm for the left ear. The calculated auditory canal volume ( V total ) was 0.7 ml for the right ear and 0.69 ml for the left ear. The auditory canal was found to be significantly longer in men than in women, and the volume greater. Conclusion The values obtained can be employed to develop a method that represents the shape of the auditory canal as accurately as possible to allow the best possible outcomes for hearing aid fitting. |
| Databáze: | OpenAIRE |
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