| Acoustic recordings in human ear canals to sounds at different locations. | |
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MedLine Citation:
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PMID: 20304288 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The head and pinna shape the sound reaching the tympanum. We explored this signal transformation in humans and a mini basketball for different sound locations in an anechoic chamber. For humans, we embedded microphones in ear molds that were custom fitted to the subject's ear canal. For the ball, the microphones were flush with the surface at +/- 90 degrees azimuths on the equator. Sounds were generated with a custom point source. In the ball, the signal level was nearly flat across frequency, with no gains. In contrast, in the ears, signal level changed in a complex way across frequency, with considerable gains. For frequencies < 2 kHz, the interaural level difference (ILD) increased with decreasing distance similarly in the human ears and ball. For frequencies > 4 kHz, ILDs in the human ears were larger and more complex than those in the ball such that the human ILDs were nonmonotonic with distance whereas the ball ILDs were monotonic with distance. |
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Authors:
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Clinton A Kuwada; Brian Bishop; Shigeyuki Kuwada; Duck O Kim |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery Volume: 142 ISSN: 1097-6817 ISO Abbreviation: Otolaryngol Head Neck Surg Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-03-22 Completed Date: 2010-04-15 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8508176 Medline TA: Otolaryngol Head Neck Surg Country: United States |
Other Details:
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Languages: eng Pagination: 615-7 Citation Subset: IM |
Copyright Information:
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Copyright 2010 American Academy of Otolaryngology-Head and Neck Surgery Foundation. Published by Mosby, Inc. All rights reserved. |
Affiliation:
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Division of Otolaryngology, Department of Neuroscience, University of Connecticut Health Center, Farmington, CT 06030-3401, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Ear Canal
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physiology* Head / anatomy & histology* Humans Sound Localization / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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