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. 2014 Jul 8;13:95. doi: 10.1186/1475-925X-13-95

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Copyright © 2014 Chen et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Measured and estimated sound pressures. The SPL at the ear-canal entrance (P_L), the esitimated SPL ( ${\hat{P}}_{TM}$ ) and measured SPL (P_TM) at the TM from two different subjects. (A): subject # 5; (B) subject # 3.