Editing Outer ear (section)

==Function==
{{Expand section|date=December 2013}}
One consequence of the configuration of the outer ear is selectively to boost the [[sound pressure]] 30- to 100-fold for frequencies around 3&nbsp;kHz. This amplification makes humans most sensitive to frequencies in this range—and also explains why they are particularly prone to acoustical injury and hearing loss near this frequency. Most human speech sounds are also distributed in the bandwidth around 3&nbsp;kHz.<ref name="Purves" >{{cite book | author = Purves, Dale, George J. Augustine, David Fitzpatrick, William C. Hall, Anthony-Samuel LaMantia, James O. McNamara, and Leonard E. White | title = Neuroscience. 4th ed. | publisher = Sinauer Associates | page = 317 |chapter=Chapter 13| year = 2008 | isbn = 978-0-87893-697-7}}</ref>