Headphones with ADEL Module - How Does it Work?
http://ElectroGravityPhysics.com - The ADEL (Ambrose Diaphonic Ear Lens) technology for in-ear monitors can be purchased from "64 Audio" and others.
Stephen Ambrose (original inventor of the first in-ear monitor and now founder and chief scientist of Asius Technologies) invented the ADEL technology to solve the 77% increase in hearing loss recently attributed to all personal listening devices - can be contacted here:
http://www.asiustechnologies.com
• Video
More information about organ Pipes:
http://physicsbuzz.physicscentral.com/
http://home.comcast.net/~pqboom/tour/
Helmholtz Resonator:
http://newt.phys.unsw.edu.au/jw/Helmh
Stethoscope invention of 1816:
http://en.wikipedia.org/wiki/Stethoscope
American Heart Association paper from1966 on sound amplication using a stehoscope (see figure 15 for graph showing a 60 dB gain around 30 Hz.):
http://circ.ahajournals.org/content/3
-Nils Rognerud
For more information visit my website: http://ElectroGravityPhysics.com
Feel free to send me personal email with any question or comment at [email protected]