Physics Question #24
Willi Luke, a 18 year old male from the Internet asks on June 6, 1999,
I am currently doing research on the e-bow, a guitar effect that calls upon an infinite feedback loop to produce infinite sustain by keeping the string in constant vibration. However, I am baffled as to the internal components and devices that drive this implement. I hypothesize that it has a huge frequency which enables it to activate strings of variable widths, however, I am still puzzled as to the schematics. Coil type? magnetics?
viewed 15398 times
answered on June 6, 1999
The following website (http://www.tonefrenzy.com/heet_electronics_ebow.htm) explains it as an "electromagnetic design, involves holding a battery operated device that looks like a stubby, metallic check mark, in close proximity to the strings, near where you'd usually hold a pick. The electromagnetic vibration is strong enough to make the string vibrate by carefully holding the device right next to the string." Also, the manufacturers of the e-bow have their own site (http://www.ebow.com/index.html) which has a lot of information on how it works, but obviously they don't give away their trade secrets. You might also try the Delphion Intellectual Property Network page (http://www.delphion.com/ - now available by subscription only) which provides access to the whole patent, complete with the electronic schematic.
Add to or comment on this answer using the form below.
Note: All submissions are moderated prior to posting.
If you found this answer useful, please consider making a small donation to science.ca.