<http://schema.org/description>
"&amp;quot;Stop, what&amp;#039;s that sound?&amp;quot; Doesn&amp;#039;t it creep you out when you don&amp;#039;t know? There are lots of sounds out there that baffle even scientists."^^<http://www.w3.org/2001/XMLSchema#string>
<http://science.howstuffworks.com/science-vs-myth/unexplained-phenomena/10-unidentified-sounds2.htm>