http://www.etymotic.com/musicians/er6more.html. |
http://www.etymotic.com/product_list/product_summary.asp?product_numberER −6. |
http://www.etymotic.com/musicians/er4more.html. |
http://www.etymotic.com/product_list/product_list_summary.asp?product_numberER −4P. |
http://www.koss.com/koss/kossweb.nsf/02ProductPrint/THEPLUG?OpenDocument. |
http://www.koss.com/koss/kossweb.nsf/02ProductPrint/KSC19?OpenDocument. |
http://www.koss.com/koss/kossweb.nsf/02ProductPrint/P4?OpenDocument. |
http://www.koss.com/koss/kossweb.nsf/02ProductPrint/StereoBudz?OpenDocument. |
http://www.jp.aiwa.com/corporate/report/2002_e/hp-vx100e.html. |
http://www.sonystyle.com/is-bin/INTERSHOP.enfinity/eCS/Store/en/-USD/SY_BrowseCatalog-Start;sid=LqEG2KngZJgG05b4. |
http://www.sel.sony.com/SEL/consumer/ss5/portable/accessories/fontopiartmear-budhead... |
Westone Music Products, The In-Ear Experts, Elite Series Brochure. |
http://www.westone.com/music/elite.html. |
http://www.earmold.com/music/universal.html. |
Westone Music Products, The In-Ear Experts, Universal Series Brochure. |
http://www.westone.com/music/universal.html. |
Sennheiser 2003 General Catalog, p. 6. |
http://www.sennheiserusa.com/pages/products/headphones/mx.htm. |
Jabra Corporation FreeSpeak BT200 Brochures. |
http://www.jabra.com/products/FreeSpeak_Bluetooth.htm. |
Future Sonics Incorporated, Ear Monitors Product Data Sheet, Oct. 2001. |
http://www.futuresonics.com/html/products.html. |