Editing Pygmy sperm whale (section)

===Melon===
[[file:Kogia breviceps sagittal + coronal.svg|left|thumb|300px]]Like other [[toothed whale]]s, the pygmy sperm whale has a "[[melon (whale)|melon]]", a body of fat and wax in the head that it uses to focus and modulate the sounds it makes.<ref name=Clarke2003>{{cite journal | author = Clarke, M.R. | year = 2003 | title = Production and control of sound by the small sperm whale, ''Kogia breviceps'' and ''K. sima'' and their implications for other Cetacea | journal = Journal of the Marine Biological Association of the United Kingdom | volume = 83 | issue = 2 | pages = 241–263 | doi = 10.1017/S0025315403007045h| bibcode = 2003JMBUK..83..241C | s2cid = 84103043 }}</ref> The inner core of the melon has a higher wax content than the outer cortex. The inner core transmits sound more slowly than the outer layer, allowing it to refract sound into a highly directional beam.<ref name=Karoletal978>R., Karol; C., Litchfield; D., Caldwell; M., Caldwell (1978). ''Compositional topography of melon and spermaceti organ lipids in the pygmy sperm whale Kogia breviceps: Implications for echolocation''. Marine Biology, Volume 47 (2)</ref> Behind the melon, separated by a thin membrane, is the [[spermaceti organ]]. Both the melon and the spermaceti organ are encased in a thick fibrous coat, resembling a [[Synovial bursa|bursa]].<ref name=Cranford1996>{{cite journal | author = Cranford, T.W.| year = 1996 | title = Functional morphology and homology in the odontocete nasal complex: implications for sound generation | journal = Journal of Morphology | volume = 228 | issue = 2 | pages = 223–285 | doi = 10.1002/(SICI)1097-4687(199606)228:3<223::AID-JMOR1>3.0.CO;2-3 | pmid=8622183| s2cid = 35653583 |display-authors=etal}}</ref> The whale produces sound by moving air through the right nasal cavity, which includes a valvular structure, or ''museau de singe'', with a thickened vocal reed, functioning like the [[vocal cord]]s of humans.