American Institute of Physics

New technology modifies music hall acoustics

A new technology that relies on a system of inflatable sound absorbers may help make any performance hall instantly convertible into a venue for music ranging from classical to hard rock. The technology will be described ...

May 31, 2013
3.4 / 5 (5) 0

Secrets of the cicada's sound

Of all the bugs that achieve the mantle of summer pest, cicadas are perhaps the most curious. They don't sting, they don't bite, they don't buzz around your head, they taste good in chocolate, but as the drowning din of the ...

May 31, 2013
3 / 5 (5) 4

Using fluctuating wind power

Incorporating wind power into existing power grids is challenging because fluctuating wind speed and direction means turbines generate power inconsistently. Coupled with customers' varying power demand, many ...

Mar 25, 2013
3.5 / 5 (6) 8 | with audio podcast

Magnetic shielding of ion beam thruster walls

Electric rocket engines known as Hall thrusters, which use a super high-velocity stream of ions to propel a spacecraft in space, have been used successfully onboard many missions for half a century. Erosion of the discharge ...

Feb 13, 2013
4.9 / 5 (15) 4 | with audio podcast