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. 2016 Mar 29;4:10. doi: 10.1186/s40349-016-0053-z

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© Dietz-Laursonn et al. 2016

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License(http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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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Fig. 1 — Schematic sound field (spatial distribution of maximum pressures) with definition of −6 dB and 5 MPa focal sizes according to IEC 61846 [18] and schematic pressure-time histories at three different positions of the sound field (focus, −6 dB isobar, 5 MPa isobar)