Projects in sound - University of Strathclyde. It's Your Voice - Singing Workshop. GarageBand for iPhone 3GS, iPhone 4, iPhone 4S, iPhone 5, iPod touch (3rd generation), iPod touch (4th generation), iPod touch (5th generation) and iPad on the iTunes App Store. Introducing the 'nano-ear' Physicists in Germany have developed the first-ever "nano-ear" capable of detecting sound on microscopic length scales with an estimated sensitivity that is six orders of magnitude below the threshold of human hearing. The device is based on an optically trapped gold nanoparticle, and its inventors claim that it could be used to "listen" to biological micro-organisms as well as investigate the motion and vibrations in tiny machines. Particles can be trapped in "optical tweezers", which are formed when laser light is focused at a point in space.
An electric dipole moment is induced in the particle and it is drawn to the most intense part of the laser's electric field. The technique was discovered in the 1980s and is used routinely in research labs around the world. It is particularly useful for manipulating biological objects, since the optical field used to make the trap is non-destructive. Sound sources The team's set-up consisted of two sound sources placed in a water-based medium. Avid Recording Studio.