@article{ref1,
title="Communication apparatus and helmet",
journal="Journal of the Acoustical Society of America",
year="2012",
author="Miranda, Stephen Alfred",
volume="132",
number="6",
pages="4090-4090",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0001-4966",
doi="10.1121/1.4770401",
url="http://dx.doi.org/10.1121/1.4770401"
}