Editing Beryllium (section)

===Acoustics===
The low weight and high rigidity of beryllium make it useful as a material for high-frequency [[speaker driver]]s. Because beryllium is expensive (many times more than [[titanium]]), hard to shape due to its brittleness, and toxic if mishandled, beryllium [[tweeter]]s are limited to high-end home,<ref>{{Cite web|url=http://www.scan-speak.dk/news/20100429a.pdf|archive-url=https://web.archive.org/web/20160303192100/http://www.scan-speak.dk/news/20100429a.pdf |archive-date=3 March 2016 |publisher=Scan Speak|date=May 2010|title=Scan Speak offers Be tweeters to OEMs and Do-It-Yourselfers}}</ref><ref>{{Cite web|url=http://www.hometheaterhifi.com/speakers/232-usher-be-718-bookshelf-speakers-with-beryllium-tweeters.html|archive-url=https://web.archive.org/web/20110613202401/http://www.hometheaterhifi.com/speakers/232-usher-be-718-bookshelf-speakers-with-beryllium-tweeters.html|archive-date=13 June 2011|first=John E. Jr.|last=Johnson|date=12 November 2007|access-date =18 September 2008|title=Usher Be-718 Bookshelf Speakers with Beryllium Tweeters}}</ref><ref>{{Cite web|url=http://www.krksys.com/krk-studio-monitor-speakers/expose.html|publisher=KRK Systems|access-date=12 February 2009|title=Exposé E8B studio monitor|archive-date=10 April 2011|archive-url=https://web.archive.org/web/20110410205303/http://www.krksys.com/krk-studio-monitor-speakers/expose.html|url-status=live}}</ref> [[pro audio]], and [[public address]] applications.<ref>{{Cite web|url=http://www.focalprofessional.com/en/technologies/index.php#tabs-2|archive-url=https://web.archive.org/web/20121231000340/http://www.focalprofessional.com/en/technologies/index.php#tabs-2|archive-date=31 December 2012|title=Beryllium use in pro audio Focal speakers}}</ref><ref>{{Cite web|work=VUE Audiotechnik |url=http://www.vueaudio.com/press/|access-date=21 May 2012|title=VUE Audio announces use of Be in Pro Audio loudspeakers|archive-url=https://web.archive.org/web/20120510155255/http://www.vueaudio.com/press/|archive-date=10 May 2012}}</ref> Some high-fidelity products have been fraudulently claimed to be made of the material.<ref>{{Cite web|url=http://www.docstoc.com/docs/45957370/BRUSH-WELLMAN |first=Mark |last=Svilar |date=8 January 2004 |access-date=13 February 2009 |title=Analysis of "Beryllium" Speaker Dome and Cone Obtained from China |archive-url=https://web.archive.org/web/20130517084140/http://www.docstoc.com/docs/45957370/BRUSH-WELLMAN |archive-date=17 May 2013 }}</ref>

Some high-end [[Magnetic cartridge|phonograph cartridges]] used beryllium cantilevers to improve tracking by reducing mass.<ref>{{Cite web|url=http://cdn.shure.com/user_guide/upload/2221/v15vxmr-user-guide-english.pdf|access-date=31 May 2017|title=Shure V15 VXmR User Guide|archive-url=https://web.archive.org/web/20170110184904/http://cdn.shure.com/user_guide/upload/2221/v15vxmr-user-guide-english.pdf|archive-date=10 January 2017}}</ref>